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0263f3797a
| Author | SHA1 | Date | |
|---|---|---|---|
  justinandClaude Opus 5
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0263f3797a | ||
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justinandClaude Opus 5
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a51b512bab |
-10
@@ -16,13 +16,3 @@ catalog.json
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recovered/
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.claude/*
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!.claude/gitea-ship.json
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# demo harness: live credentials and generated media never go in git
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demo/demo_win.json
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demo/vo/*.wav
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demo/vo/narration.json
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demo/vo/durations*.json
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demo/*.cast
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demo/*.gif
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demo/*.mp4
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demo/marks.jsonl
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@@ -1,75 +0,0 @@
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# Demo recording harness
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Records the rewind loop running against a live ZVM as a narrated MP4. Terminal
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only: no screen capture, no video editor.
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```
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tmux ──▶ asciinema ──▶ agg ──▶ ffmpeg ──▶ mp4
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│ ▲
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└── left pane: driver, right pane: journal │
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│
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xAI /v1/tts ──▶ wav per beat ──────────┘ (mux_vo.py)
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```
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## Pieces
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| file | what it does |
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|---|---|
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| `windows_driver.py` | Windows demo. Intro over the diagram, then the live loop via WinRM. |
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| `driver.py` | The Linux equivalent, over SSH. |
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| `diagram.py` | Architecture diagram, revealed in four chunks against intro beats i1..i4. |
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| `journal.py` | Right-hand pane. Polls a VPG's checkpoints so the tag appears on camera. |
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| `record_win.sh` / `record.sh` | Drive tmux + asciinema, then agg and ffmpeg. |
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| `narration.md` | The script. One `[beat]` per block; the source of truth. |
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| `vo/build_narration.py` | Parses `narration.md`, synthesises a wav per beat, records durations. |
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| `mux_vo.py` | Aligns the wavs to the recorded beat marks and muxes the audio. |
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## Running it
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```bash
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cp demo/demo_win.example.json demo/demo_win.json # then fill in the guest creds
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export XAI_KEY_FILE=~/xai-api.key XAI_VOICE_ID=<id from /v1/custom-voices>
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python3 demo/vo/build_narration.py 1.0 # synthesise, writes durations.json
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demo/record_win.sh win1 # record; writes marks.jsonl
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python3 demo/mux_vo.py win1 # -> win1_narrated.mp4
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```
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`demo_win.json` holds live guest credentials and is gitignored. So are the
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generated `.wav`, `.cast`, `.gif` and `.mp4` files.
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## How the audio stays in sync
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The driver writes `marks.jsonl` as it runs: one line per beat with the real
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elapsed time it started. `mux_vo.py` delays each wav to its recorded mark, so
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sync survives a slow API call or an FLR mount that takes longer than usual.
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Nothing is predicted.
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Two things this depends on:
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- **`agg --idle-time-limit` must be larger than the longest pause** (the scripts
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pass 3600). The default is 5 seconds, which compresses idle time, and that
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silently breaks the mapping between wall clock and video time.
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- **Each beat holds for its narration length.** `hold()` sleeps out whatever is
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left after the work finishes, so a line is never cut off mid-sentence.
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Check alignment after a mux: the FLR wait should measure near silence.
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```bash
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ffmpeg -v error -i out.mp4 -vn -ac 1 /tmp/a.wav
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ffmpeg -hide_banner -ss 150 -t 6 -i /tmp/a.wav -af volumedetect -f null /dev/null 2>&1 | grep mean_volume
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```
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Speech sits around -22 dB; a correctly aligned gap reads about -91 dB.
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## Narration gotchas
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- **Do not map acronyms to run-together phonetics.** The `replace` map takes
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`{"phrase": "pronunciation"}`, and `{"VM": "vee em"}` gets spoken as one word,
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"vem". Either leave the acronym alone or expand it: `{"VM": "virtual machine"}`.
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- **Write for speech, not for the page.** Short declaratives and fragment stacks
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read well and sound robotic out loud. Commas and full stops are what the engine
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uses for pacing, so clauses joined with commas breathe; a wall of four-word
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sentences marches.
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- `volumedetect` reports `n_samples: 0` when pointed at a file whose first stream
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is video. Extract the audio first, then measure, or you will think a working
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track is silent.
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@@ -1,12 +0,0 @@
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{
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"vpg_id": "1816d7a4-3316-44dc-bafd-6d84f63d4ba9",
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"vpg_name": "local",
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"vm_query": "ad1(1)",
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"vm_identifier": "f7f0835d-a5e4-46fa-b710-4bc32076e820.vm-2033",
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"change_id": "win-demo-rewind",
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"guest_path": "C:\\demo\\app-config.yaml",
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"bad_content": "upstream: http://0.0.0.0:1 # BROKEN-BY-AGENT",
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"host": "192.0.2.10",
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"user": "EXAMPLE\\administrator",
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"password": "change-me"
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}
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@@ -1,44 +0,0 @@
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"""Architecture diagram, revealed in four chunks aligned to intro beats i1..i4."""
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C = "\033[36m"; B = "\033[1m"; D = "\033[2m"; G = "\033[32m"; Y = "\033[33m"; R = "\033[0m"
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CHUNKS = [
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[
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f" {B}{C}┌────────────────────────────────┐{R}",
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f" {B}{C}│{R} Developer / process owner {B}{C}│{R} {D}\"change this config\"{R}",
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f" {B}{C}└───────────────┬────────────────┘{R}",
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f" {B}{C} │{R}",
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f" {B}{C} ▼{R}",
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f" {B}{C}┌────────────────────────────────┐{R}",
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f" {B}{C}│{R} Business application on a VM {B}{C}│{R}",
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f" {B}{C}└───────────────┬────────────────┘{R}",
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],
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[
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f" {D} │ protected by{R}",
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f" {D} ▼{R}",
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f" {B}{G}┌────────────────────────────────┐{R} {D}┌───────────────────────────┐{R}",
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f" {B}{G}│{R} Zerto continuous protection {B}{G}│{R} vs {D}│ Nightly backup │{R}",
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f" {B}{G}│{R} {G}recovery point every few secs{R} {B}{G}│{R} {D}│ recovery point: hours old │{R}",
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f" {B}{G}└────────────────────────────────┘{R} {D}└───────────────────────────┘{R}",
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],
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[
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"",
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f" {B}{Y}┌────────────────────────────────┐{R}",
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f" {B}{Y}│{R} AI agent {B}{Y}│{R} 1. ask Zerto: is this protected?",
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f" {B}{Y}│{R} authorised to make the change {B}{Y}│{R} 2. tag a checkpoint in the journal",
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f" {B}{Y}└────────────────────────────────┘{R} 3. make the change, and test it",
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],
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[
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"",
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f" 4. {B}broken, and the agent cannot fix it{R}",
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f" recover the file, or the whole VM,",
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f" {G}from the checkpoint taken at step 2{R}",
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],
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]
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def frame(upto: int) -> str:
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"""Everything revealed through chunk `upto` (1-based)."""
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out = ["\033[H\033[2J", f" {B}{C}ZERTO AI REWIND{R} {D}how it fits together{R}", ""]
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for chunk in CHUNKS[:upto]:
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out.extend(chunk)
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return "\n".join(out)
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-254
@@ -1,254 +0,0 @@
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"""Left pane: drive zerto_rewind_mcp over real MCP stdio. Full rewind loop."""
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from __future__ import annotations
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import asyncio, json, os, shlex, subprocess, sys, time
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from pathlib import Path
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from mcp import ClientSession, StdioServerParameters
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from mcp.client.stdio import stdio_client
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SP = Path(__file__).parent
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CFG = json.loads((SP / "demo.json").read_text())
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REPO = "/home/justin/github/zerto-ai-rewind"
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RST, BOLD, DIM = "\033[0m", "\033[1m", "\033[2m"
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CYAN, GREEN, RED, YEL, MAG = "\033[36m", "\033[32m", "\033[31m", "\033[33m", "\033[35m"
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SPEED = float(os.environ.get("DEMO_SPEED", "1.0"))
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def recovered_bytes(rec: dict) -> bytes:
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"""zerto_recover_file returns the content now, not a path on the MCP host.
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The server may be on another machine, so a path there is of no use here.
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"""
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import base64
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if rec.get("encoding") == "base64":
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return base64.b64decode(rec["content"])
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return rec["content"].encode()
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def w(s=""):
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sys.stdout.write(s + "\n"); sys.stdout.flush()
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def type_out(s, delay=0.012, color=""):
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sys.stdout.write(color)
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for ch in s:
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sys.stdout.write(ch); sys.stdout.flush()
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time.sleep(delay * SPEED)
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sys.stdout.write(RST + "\n"); sys.stdout.flush()
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def beat(n=1.2):
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time.sleep(n * SPEED)
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STEP = [0]
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def step(title):
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STEP[0] += 1
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w()
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w(f"{BOLD}{CYAN}{'='*66}{RST}")
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type_out(f" STEP {STEP[0]} {title}", 0.008, BOLD + CYAN)
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w(f"{BOLD}{CYAN}{'='*66}{RST}")
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beat(0.5)
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def note(s):
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type_out(f" {s}", 0.010, DIM)
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def call_banner(tool, args):
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w(f"{MAG} -> MCP call{RST} {BOLD}{tool}{RST}")
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for k, v in args.items():
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w(f"{DIM} {k} = {v}{RST}")
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def show(payload, keep=None, limit=22):
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if keep:
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payload = {k: payload[k] for k in keep if k in payload}
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text = json.dumps(payload, indent=2, default=str)
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lines = text.splitlines()
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for line in lines[:limit]:
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w(f"{DIM} |{RST} {line}")
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if len(lines) > limit:
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w(f"{DIM} | ... {len(lines)-limit} more lines{RST}")
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def ssh_base():
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if CFG.get("password"):
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return ["sshpass", "-p", CFG["password"], "ssh", "-o", "StrictHostKeyChecking=no",
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"-o", "UserKnownHostsFile=/dev/null", "-o", "LogLevel=ERROR"]
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base = ["ssh", "-o", "StrictHostKeyChecking=no", "-o", "UserKnownHostsFile=/dev/null",
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"-o", "LogLevel=ERROR"]
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if CFG.get("key"):
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base += ["-i", CFG["key"]]
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return base
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def guest(cmd, show_cmd=True):
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target = f"{CFG['user']}@{CFG['host']}"
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full = ssh_base() + [target, cmd]
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if show_cmd:
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w(f"{YEL} $ ssh {target} {shlex.quote(cmd)}{RST}")
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r = subprocess.run(full, capture_output=True, text=True, timeout=60)
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out = (r.stdout + r.stderr).rstrip()
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for line in out.splitlines():
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w(f"{DIM} |{RST} {line}")
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return r.returncode, out
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async def main():
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w(f"\n{BOLD}{CYAN} ZERTO AI REWIND{RST} {DIM}live end-to-end{RST}\n")
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type_out(" An agent is about to change a file on a protected VM.", 0.014)
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type_out(" Zerto already journals that VM. Make the agent use it.", 0.014)
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beat(1.5)
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params = StdioServerParameters(
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command=f"{REPO}/.venv/bin/zerto-rewind-mcp",
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env={**os.environ, "ZERTO_REWIND_CONFIG": f"{REPO}/config.json"},
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)
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devnull = open(os.devnull, 'w')
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async with stdio_client(params, errlog=devnull) as (r, s):
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async with ClientSession(r, s) as sess:
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step("Connect to the rewind MCP")
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await sess.initialize()
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tools = await sess.list_tools()
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note(f"{len(tools.tools)} tools from zerto_rewind_mcp")
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for t in tools.tools:
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w(f"{DIM} - {t.name}{RST}")
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beat(2.0)
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async def _ticker(label):
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t0 = time.time()
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try:
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while True:
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await asyncio.sleep(5)
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el = int(time.time() - t0)
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sys.stdout.write(f"\r{DIM} {label} ... {el}s{RST}")
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sys.stdout.flush()
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except asyncio.CancelledError:
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el = int(time.time() - t0)
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if el >= 5:
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sys.stdout.write(f"\r{DIM} {label} ... {el}s done{RST}\n")
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else:
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sys.stdout.write("\r" + " " * 50 + "\r")
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sys.stdout.flush()
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raise
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async def call(name, **args):
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call_banner(name, args)
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tick = asyncio.create_task(_ticker("working"))
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try:
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res = await sess.call_tool(name, args)
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finally:
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tick.cancel()
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try:
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await tick
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except asyncio.CancelledError:
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pass
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return json.loads(res.content[0].text)
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# ---- 1. the good state on the guest
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step("The file the agent is about to break")
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guest(f"cat {CFG['guest_path']}")
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beat(1.8)
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# ---- 2. find protection
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step("zerto_find_protection - is this VM protected?")
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note("Reads skip the guard. This is the read.")
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found = await call("zerto_find_protection", query=CFG["vm_query"])
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show(found)
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if not found.get("ok"):
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w(f"{RED} find_protection not ok - stopping{RST}"); return 1
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vm = found["vm"]
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beat(2.5)
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# ---- 3. guard
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step("zerto_guard_before_mutate - pin the journal FIRST")
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note("Capture-before-execute. No tag, no change.")
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note("The checkpoint name records which agent, and what it is about to do.")
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note("Watch the journal pane on the right.")
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guard = await call("zerto_guard_before_mutate",
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query=CFG["vm_query"], change_id=CFG["change_id"], agent="claude",
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action=f"edit {CFG['guest_path']}")
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show(guard, keep=["ok", "tag", "tagged", "skipped", "errors", "message"])
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if not guard.get("ok"):
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w(f"{RED} GUARD FAILED - refusing the change{RST}"); return 1
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tag = guard["tag"]
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tagged = guard["tagged"][0]
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t_tag = time.strftime("%H:%M:%S")
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w(f"{GREEN}{BOLD} tagged checkpoint {tagged['checkpoint_id']} on {tagged['vpg_name']}{RST}")
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w(f"{GREEN} inserted at {t_tag}{RST}")
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w(f"{GREEN} name: {tag}{RST}")
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w(f"{DIM} this checkpoint is the rewind point. remember cp {tagged['checkpoint_id']}.{RST}")
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beat(4.0)
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# ---- 4. the bad change
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step("Now the agent makes the bad change")
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guest(f"printf '%s\\n' {shlex.quote(CFG['bad_content'])} > {CFG['guest_path']}")
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guest(f"cat {CFG['guest_path']}")
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t_bad = time.strftime("%H:%M:%S")
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w(f"{RED}{BOLD} the good content is gone from the guest ({t_bad}){RST}")
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note("Git never had this file. Last night's backup is hours stale.")
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beat(2.5)
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# ---- 5. refusal without a human
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step("zerto_recover_file without a human yes")
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deny = await call("zerto_recover_file",
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vpg_identifier=tagged["vpg_identifier"],
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vm_identifier=vm["vm_identifier"],
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checkpoint_identifier=tagged["checkpoint_id"],
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guest_path=CFG["guest_path"], confirmed=False)
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show(deny)
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w(f"{YEL} refused. FLR mounts a disk; a human says yes.{RST}")
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beat(2.5)
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# ---- 6. recover
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rec_cp = tagged["checkpoint_id"]
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step("Human says yes - FLR from the pre-mutation checkpoint")
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w(f"{BOLD} provenance{RST}")
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w(f" {GREEN}cp {tagged['checkpoint_id']} inserted {t_tag}{RST} {DIM}<- guard, BEFORE the change{RST}")
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w(f" {RED}bad write {t_bad}{RST} {DIM}<- the mutation, AFTER{RST}")
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assert rec_cp == tagged["checkpoint_id"], "recovery must use the guard checkpoint"
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w(f"{DIM} recovering from cp {rec_cp}, not the newest checkpoint.{RST}")
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note(f"name: {tag}")
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rec = await call("zerto_recover_file",
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vpg_identifier=tagged["vpg_identifier"],
|
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vm_identifier=vm["vm_identifier"],
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checkpoint_identifier=tagged["checkpoint_id"],
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guest_path=CFG["guest_path"], confirmed=True)
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show(rec)
|
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if not rec.get("ok"):
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w(f"{RED} FLR failed{RST}"); return 1
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beat(1.5)
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w(f"{YEL} recovered {rec['bytes']} bytes, sha256 {rec['sha256'][:16]}...{RST}")
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||||
body = recovered_bytes(rec).decode()
|
||||
for line in body.splitlines():
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||||
w(f"{GREEN}{BOLD} | {line}{RST}")
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||||
beat(2.5)
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||||
|
||||
# ---- 7. put it back
|
||||
step("Copy it back to the guest")
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||||
note("This part is scp, not Zerto. Zerto got the bytes back.")
|
||||
target = f"{CFG['user']}@{CFG['host']}"
|
||||
local_copy = SP / rec["name"]
|
||||
local_copy.write_bytes(recovered_bytes(rec))
|
||||
scp = (["sshpass", "-p", CFG["password"]] if CFG.get("password") else []) + \
|
||||
["scp", "-o", "StrictHostKeyChecking=no", "-o", "UserKnownHostsFile=/dev/null",
|
||||
"-o", "LogLevel=ERROR"] + (["-i", CFG["key"]] if CFG.get("key") else []) + \
|
||||
[str(local_copy), f"{target}:{CFG['guest_path']}"]
|
||||
w(f"{YEL} $ scp {rec['name']} {target}:{CFG['guest_path']}{RST}")
|
||||
subprocess.run(scp, capture_output=True, text=True, timeout=60)
|
||||
guest(f"cat {CFG['guest_path']}")
|
||||
beat(1.5)
|
||||
|
||||
w()
|
||||
w(f"{BOLD}{GREEN}{'='*66}{RST}")
|
||||
type_out(" REWOUND. RPO was the journal, not last night.", 0.016, BOLD + GREEN)
|
||||
w(f"{BOLD}{GREEN}{'='*66}{RST}")
|
||||
beat(4.0)
|
||||
return 0
|
||||
|
||||
sys.exit(asyncio.run(main()))
|
||||
@@ -1,78 +0,0 @@
|
||||
"""Right pane: live view of a VPG journal, tagged checkpoints highlighted."""
|
||||
from __future__ import annotations
|
||||
import asyncio, os, sys, time
|
||||
os.environ.setdefault("ZERTO_REWIND_CONFIG", "/home/justin/github/zerto-ai-rewind/config.json")
|
||||
from zerto_rewind_mcp.config import load_config
|
||||
from zerto_rewind_mcp.client import ZertoClient
|
||||
from zerto_rewind_mcp.checkpoints import checkpoint_tag, checkpoint_id
|
||||
from zerto_rewind_mcp.util import pick
|
||||
|
||||
VPG_ID = sys.argv[1]
|
||||
VPG_NAME = sys.argv[2] if len(sys.argv) > 2 else VPG_ID
|
||||
ROWS = int(os.environ.get("JOURNAL_ROWS", "10"))
|
||||
|
||||
DIM, RST, BOLD = "\033[2m", "\033[0m", "\033[1m"
|
||||
CYAN, GREEN, YEL = "\033[36m", "\033[32m", "\033[33m"
|
||||
|
||||
|
||||
def _wrap_tag(tag, width=52, maxlines=3):
|
||||
tag = tag.replace("; Used for File Level Restore", " [FLR]")
|
||||
out = []
|
||||
while tag and len(out) < maxlines:
|
||||
out.append(tag[:width]); tag = tag[width:]
|
||||
return out
|
||||
|
||||
|
||||
def ts_of(row):
|
||||
return str(pick(row, "TimeStamp", "Timestamp", "timestamp") or "")
|
||||
|
||||
|
||||
def render(rows, spin, tagged):
|
||||
out = ["\033[H\033[2J"]
|
||||
out.append(f"{BOLD}{CYAN} ZERTO JOURNAL {RST}{BOLD}{VPG_NAME}{RST}\n")
|
||||
out.append(f"{DIM} vpg {VPG_ID}{RST}\n")
|
||||
out.append(f"{DIM} {len(rows)} checkpoints{RST} {YEL}{len(tagged)} ai-tagged{RST} {DIM}{spin}{RST}\n\n")
|
||||
|
||||
out.append(f"{BOLD} AI TAGS{RST}\n")
|
||||
if not tagged:
|
||||
out.append(f"{DIM} (none yet){RST}\n")
|
||||
for row in tagged[-4:]:
|
||||
t = ts_of(row).replace("T", " ").replace(".000Z", "")[11:]
|
||||
out.append(f"{GREEN}{BOLD} * {t} cp {checkpoint_id(row)}{RST}\n")
|
||||
for seg in _wrap_tag(checkpoint_tag(row)):
|
||||
out.append(f"{GREEN} {seg}{RST}\n")
|
||||
|
||||
out.append(f"\n{BOLD} NEWEST{RST}\n")
|
||||
for row in rows[-ROWS:]:
|
||||
tag = checkpoint_tag(row)
|
||||
t = ts_of(row).replace("T", " ").replace(".000Z", "")
|
||||
cid = checkpoint_id(row)
|
||||
t = t[11:]
|
||||
if tag.startswith("ai:"):
|
||||
out.append(f"{GREEN}{BOLD} * {t} cp {cid} <-- new{RST}\n")
|
||||
elif tag:
|
||||
out.append(f"{DIM} {t} cp {cid} {tag[:20]}{RST}\n")
|
||||
else:
|
||||
out.append(f"{DIM} {t} cp {cid}{RST}\n")
|
||||
sys.stdout.write("".join(out))
|
||||
sys.stdout.flush()
|
||||
|
||||
|
||||
async def main():
|
||||
s = load_config()
|
||||
c = ZertoClient(base_url=s["zerto_url"], username=s["username"], password=s["password"],
|
||||
client_id=s.get("client_id", "zerto-client"), verify_tls=bool(s.get("verify_tls")))
|
||||
spinner = "|/-\\"
|
||||
i = 0
|
||||
while True:
|
||||
try:
|
||||
rows = await c.list_checkpoints(VPG_ID)
|
||||
tagged = [r for r in rows if checkpoint_tag(r).startswith("ai:")]
|
||||
render(rows, spinner[i % 4], tagged)
|
||||
except Exception as exc:
|
||||
sys.stdout.write(f"\n journal poll error: {exc}\n")
|
||||
sys.stdout.flush()
|
||||
i += 1
|
||||
await asyncio.sleep(3)
|
||||
|
||||
asyncio.run(main())
|
||||
@@ -1,39 +0,0 @@
|
||||
"""Build the narration track from recorded beat marks and mux it onto the video."""
|
||||
import json, subprocess, sys
|
||||
from pathlib import Path
|
||||
|
||||
SP = Path(__file__).parent
|
||||
VO = SP / "vo"
|
||||
take = sys.argv[1] if len(sys.argv) > 1 else "win1"
|
||||
video = SP / f"{take}.mp4"
|
||||
out = SP / f"{take}_narrated.mp4"
|
||||
|
||||
marks = [json.loads(l) for l in (SP / "marks.jsonl").read_text().splitlines() if l.strip()]
|
||||
dur = json.loads((VO / "durations.json").read_text())
|
||||
vlen = float(subprocess.run(["ffprobe", "-v", "error", "-show_entries", "format=duration",
|
||||
"-of", "default=nw=1:nk=1", str(video)],
|
||||
capture_output=True, text=True).stdout.strip())
|
||||
|
||||
inputs, filters, labels = [], [], []
|
||||
for i, m in enumerate(marks):
|
||||
wav = VO / f"{m['key']}.wav"
|
||||
if not wav.exists():
|
||||
print(f" missing {wav.name}, skipping"); continue
|
||||
delay_ms = int(m["t"] * 1000)
|
||||
inputs += ["-i", str(wav)]
|
||||
filters.append(f"[{i}:a]adelay={delay_ms}|{delay_ms},apad[a{i}]")
|
||||
labels.append(f"[a{i}]")
|
||||
end = m["t"] + dur.get(m["key"], 0)
|
||||
flag = "" if end <= vlen + 0.5 else " <-- OVERRUNS VIDEO"
|
||||
print(f" {m['key']:9} start {m['t']:7.2f}s len {dur.get(m['key'],0):5.2f}s end {end:7.2f}s{flag}")
|
||||
|
||||
mix = "".join(labels) + f"amix=inputs={len(labels)}:normalize=0,atrim=0:{vlen},asetpts=N/SR/TB[a]"
|
||||
cmd = (["ffmpeg", "-y", "-loglevel", "error"] + inputs + ["-i", str(video),
|
||||
"-filter_complex", ";".join(filters) + ";" + mix,
|
||||
"-map", f"{len(labels)}:v", "-map", "[a]",
|
||||
"-c:v", "copy", "-c:a", "aac", "-b:a", "160k", "-shortest", str(out)])
|
||||
r = subprocess.run(cmd, capture_output=True, text=True)
|
||||
if r.returncode != 0:
|
||||
print("ffmpeg failed:\n", r.stderr[-1500:]); sys.exit(1)
|
||||
print(f"\n video {vlen:.1f}s | narration ends {max(m['t']+dur.get(m['key'],0) for m in marks):.1f}s")
|
||||
print(f" -> {out}")
|
||||
@@ -1,52 +0,0 @@
|
||||
# Zerto AI Rewind - demo narration (v3, rewritten against the jp-voice profile)
|
||||
# Edit any line, then tell Claude to re-read this file.
|
||||
# Blank line separates beats. Lines starting with # are ignored.
|
||||
|
||||
## PART 1 - INTRO (architecture diagram on screen, builds as each beat lands)
|
||||
|
||||
[i1] Hello, and welcome to the Zerto AI Rewind demo.
|
||||
|
||||
[i2] AI agents are acting on production systems faster than ever, and a lot faster
|
||||
than backup was ever designed to keep up with. Zerto's continuous data
|
||||
protection is a good fit for that, because the journal is always running.
|
||||
|
||||
[i3] In this demo an AI agent makes a change to a production system. But before it
|
||||
does, it checks whether that VM is protected by Zerto, and if it is, it inserts
|
||||
a tagged checkpoint into the journal first.
|
||||
|
||||
[i4] That gives the agent something to fall back on. If the change breaks the
|
||||
application, and the agent can't fix it on its own, it can use file level or
|
||||
full system recovery to get back to the moment before it touched anything.
|
||||
|
||||
## PART 2 - THE DEMO (audience: a customer, not an engineer)
|
||||
|
||||
[d1] This is the agent connecting to Zerto. Everything from here runs against a live
|
||||
Zerto environment.
|
||||
|
||||
[d2] The machine is a production Windows server, and Zerto is already protecting it.
|
||||
The agent has been asked to change a configuration file on that server.
|
||||
|
||||
[d3] Before it changes anything, it asks Zerto a simple question. Is this machine
|
||||
protected, and which protection group is it in?
|
||||
|
||||
[d4] It is, so Zerto puts a tagged checkpoint into the journal, and the agent waits
|
||||
until Zerto confirms that checkpoint is really there before it goes any further.
|
||||
|
||||
[d5] Now the change goes in, and it breaks the file. The version that was there is
|
||||
gone from the server. Backup has a copy from last night, so that's hours old
|
||||
already. Zerto has one from seconds before the change.
|
||||
|
||||
[d6] The agent can't just recover on its own. Recovery has to be approved by a
|
||||
person, so at this point it stops and asks.
|
||||
|
||||
[d7] With approval, Zerto goes back to the checkpoint from just before the change,
|
||||
and hands back the original file exactly as it was.
|
||||
|
||||
[d8] Putting that file back onto the server is an ordinary copy. Zerto's job was
|
||||
keeping the data in the first place.
|
||||
|
||||
[d9] This was a single file, so file level recovery was enough. That same checkpoint
|
||||
would let you bring back the entire machine if the damage were bigger.
|
||||
|
||||
[d10] And that's the point. The recovery point is the journal, seconds before the
|
||||
change, instead of last night's backup window.
|
||||
@@ -1,52 +0,0 @@
|
||||
#!/usr/bin/env bash
|
||||
# Record the split-pane rewind demo to an MP4.
|
||||
set -uo pipefail
|
||||
SP="$(cd "$(dirname "$0")" && pwd)"
|
||||
REPO=/home/justin/github/zerto-ai-rewind
|
||||
PY="$REPO/.venv/bin/python"
|
||||
VPG_ID="$(python3 -c "import json;print(json.load(open('$SP/demo.json'))['vpg_id'])")"
|
||||
VPG_NAME="$(python3 -c "import json;print(json.load(open('$SP/demo.json'))['vpg_name'])")"
|
||||
TAKE="${1:-take1}"
|
||||
CAST="$SP/$TAKE.cast"; GIF="$SP/$TAKE.gif"; MP4="$SP/$TAKE.mp4"
|
||||
|
||||
tmux -L demo kill-server 2>/dev/null
|
||||
tmux -L rec kill-server 2>/dev/null
|
||||
sleep 1
|
||||
|
||||
# demo session: driver left, journal right
|
||||
tmux -L demo new-session -d -s demo -x 200 -y 50 -c "$REPO" \
|
||||
"$PY $SP/driver.py; echo; echo ' [take complete]'; sleep 3; tmux -L demo kill-server"
|
||||
tmux -L demo set-option -g status off
|
||||
tmux -L demo split-window -h -l 60 -t demo -c "$REPO" \
|
||||
"JOURNAL_ROWS=10 $PY $SP/journal.py $VPG_ID $VPG_NAME"
|
||||
tmux -L demo select-pane -t 0
|
||||
|
||||
# recorder session gives asciinema a pty
|
||||
tmux -L rec new-session -d -s rec -x 200 -y 50 \
|
||||
"$SP/recvenv/bin/asciinema rec '$CAST' --overwrite --quiet -c 'tmux -L demo attach -t demo'"
|
||||
|
||||
echo "recording -> $CAST"
|
||||
for i in $(seq 1 600); do
|
||||
tmux -L rec has-session -t rec 2>/dev/null || break
|
||||
sleep 2
|
||||
done
|
||||
tmux -L demo kill-server 2>/dev/null
|
||||
tmux -L rec kill-server 2>/dev/null
|
||||
sleep 1
|
||||
|
||||
[ -s "$CAST" ] || { echo "NO CAST PRODUCED"; exit 1; }
|
||||
echo "cast: $(du -h "$CAST" | cut -f1) duration: $(python3 -c "
|
||||
import json,sys
|
||||
last=0
|
||||
for l in open('$CAST'):
|
||||
l=l.strip()
|
||||
if l.startswith('['):
|
||||
last=json.loads(l)[0]
|
||||
print(f'{last:.0f}s')")"
|
||||
|
||||
"$SP/bin/agg" --font-size 14 --fps-cap 10 --idle-time-limit 2 --theme asciinema "$CAST" "$GIF"
|
||||
ffmpeg -y -loglevel error -i "$GIF" \
|
||||
-movflags +faststart -pix_fmt yuv420p -c:v libx264 -crf 20 \
|
||||
-vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" "$MP4"
|
||||
echo "MP4: $MP4 ($(du -h "$MP4" | cut -f1))"
|
||||
ffprobe -v error -show_entries format=duration:stream=width,height -of default=nw=1 "$MP4"
|
||||
@@ -1,42 +0,0 @@
|
||||
#!/usr/bin/env bash
|
||||
# Record the Windows rewind demo. NO idle compression: the video timeline must
|
||||
# equal wall clock so the narration can be aligned to the recorded beat marks.
|
||||
set -uo pipefail
|
||||
SP="$(cd "$(dirname "$0")" && pwd)"
|
||||
REPO=/home/justin/github/zerto-ai-rewind
|
||||
PY="$REPO/.venv/bin/python"
|
||||
VPG_ID=$(python3 -c "import json;print(json.load(open('$SP/demo_win.json'))['vpg_id'])")
|
||||
TAKE="${1:-win1}"
|
||||
CAST="$SP/$TAKE.cast"; GIF="$SP/$TAKE.gif"; MP4="$SP/$TAKE.mp4"
|
||||
|
||||
tmux -L demo kill-server 2>/dev/null; tmux -L rec kill-server 2>/dev/null; sleep 1
|
||||
rm -f "$SP/marks.jsonl"
|
||||
|
||||
tmux -L demo new-session -d -s demo -x 200 -y 50 -c "$REPO" \
|
||||
"$PY $SP/windows_driver.py; echo; echo ' [take complete]'; sleep 2; tmux -L demo kill-server"
|
||||
tmux -L demo set-option -g status off
|
||||
tmux -L demo split-window -h -l 60 -t demo -c "$REPO" \
|
||||
"JOURNAL_ROWS=10 $PY $SP/journal.py $VPG_ID ad1"
|
||||
tmux -L demo select-pane -t 0
|
||||
|
||||
tmux -L rec new-session -d -s rec -x 200 -y 50 \
|
||||
"$SP/recvenv/bin/asciinema rec '$CAST' --overwrite --quiet -c 'tmux -L demo attach -t demo'"
|
||||
|
||||
echo "recording -> $CAST"
|
||||
for i in $(seq 1 450); do tmux -L rec has-session -t rec 2>/dev/null || break; sleep 2; done
|
||||
tmux -L demo kill-server 2>/dev/null; tmux -L rec kill-server 2>/dev/null; sleep 1
|
||||
[ -s "$CAST" ] || { echo "NO CAST"; exit 1; }
|
||||
|
||||
echo "cast duration: $(python3 -c "
|
||||
import json
|
||||
last=0
|
||||
for l in open('$CAST'):
|
||||
l=l.strip()
|
||||
if l.startswith('['): last=json.loads(l)[0]
|
||||
print(f'{last:.1f}s')")"
|
||||
# idle-time-limit huge = no compression, so 1s of cast == 1s of video
|
||||
"$SP/bin/agg" --font-size 14 --fps-cap 10 --idle-time-limit 3600 --theme asciinema "$CAST" "$GIF"
|
||||
ffmpeg -y -loglevel error -i "$GIF" -movflags +faststart -pix_fmt yuv420p -c:v libx264 -crf 20 \
|
||||
-vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" "$MP4"
|
||||
echo "MP4: $MP4 ($(du -h "$MP4" | cut -f1))"
|
||||
ffprobe -v error -show_entries format=duration:stream=width,height -of default=nw=1 "$MP4"
|
||||
@@ -1,35 +0,0 @@
|
||||
"""Parse the approved markdown script into clips + durations."""
|
||||
import json, os, re, subprocess, sys
|
||||
from pathlib import Path
|
||||
SP = Path(__file__).parent
|
||||
SRC = Path(os.environ.get("NARRATION_MD", SP.parent / "narration.md"))
|
||||
KEY = Path(os.environ.get("XAI_KEY_FILE", "~/xai-api.key")).expanduser().read_text().strip()
|
||||
VOICE = os.environ.get("XAI_VOICE_ID", "") # a custom voice id from /v1/custom-voices
|
||||
SPEED = float(sys.argv[1]) if len(sys.argv) > 1 else 1.0
|
||||
|
||||
beats = re.findall(r"\[([id]\d+)\]\s*(.*?)(?=\n\n|\Z)", SRC.read_text(), re.S)
|
||||
lines = {k: " ".join(v.split()) for k, v in beats}
|
||||
(SP / "narration.json").write_text(json.dumps(lines, indent=2) + "\n")
|
||||
|
||||
# Do NOT map an acronym to run-together phonetics: {"VM": "vee em"} is spoken
|
||||
# as one word, "vem". Expand it instead, or leave it alone.
|
||||
REPLACE = {"VM": "virtual machine"}
|
||||
out = {}
|
||||
for key, text in lines.items():
|
||||
body = {"text": text, "voice_id": VOICE, "language": "en", "speed": SPEED,
|
||||
"replace": REPLACE, "output_format": {"codec": "wav", "sample_rate": 24000}}
|
||||
req = SP / "req.json"; req.write_text(json.dumps(body))
|
||||
dest = SP / f"{key}.wav"
|
||||
code = subprocess.run(["curl", "-sS", "-o", str(dest), "-w", "%{http_code}", "-X", "POST",
|
||||
"https://api.x.ai/v1/tts", "-H", f"Authorization: Bearer {KEY}",
|
||||
"-H", "Content-Type: application/json", "--data-binary", f"@{req}"],
|
||||
capture_output=True, text=True).stdout.strip()
|
||||
req.unlink()
|
||||
if code != "200":
|
||||
print(f" {key}: HTTP {code} FAILED"); sys.exit(1)
|
||||
d = float(subprocess.run(["ffprobe", "-v", "error", "-show_entries", "format=duration",
|
||||
"-of", "default=nw=1:nk=1", str(dest)], capture_output=True, text=True).stdout.strip())
|
||||
out[key] = round(d, 2)
|
||||
print(f" {key:5} {d:5.2f}s {len(text.split()):3} words")
|
||||
(SP / "durations.json").write_text(json.dumps(out, indent=1))
|
||||
print(f"\n {len(out)} clips, {sum(out.values()):.1f}s of narration")
|
||||
@@ -1,204 +0,0 @@
|
||||
"""Windows rewind demo. Beats hold for their narration length and log real start times."""
|
||||
from __future__ import annotations
|
||||
import json, os, sys, time
|
||||
from pathlib import Path
|
||||
|
||||
import winrm
|
||||
import diagram
|
||||
from mcp import ClientSession, StdioServerParameters
|
||||
from mcp.client.stdio import stdio_client
|
||||
|
||||
SP = Path(__file__).parent
|
||||
CFG = json.loads((SP / "demo_win.json").read_text())
|
||||
DUR = json.loads((SP / "vo" / "durations.json").read_text())
|
||||
REPO = "/home/justin/github/zerto-ai-rewind"
|
||||
MARKS = SP / "marks.jsonl"
|
||||
PAD = 0.8 # breath between beats
|
||||
|
||||
RST, BOLD, DIM = "\033[0m", "\033[1m", "\033[2m"
|
||||
CYAN, GREEN, RED, YEL, MAG = "\033[36m", "\033[32m", "\033[31m", "\033[33m", "\033[35m"
|
||||
|
||||
T0 = time.time()
|
||||
STEP = [0]
|
||||
|
||||
|
||||
|
||||
def recovered_bytes(rec: dict) -> bytes:
|
||||
"""zerto_recover_file returns the content now, not a path on the MCP host.
|
||||
|
||||
The server may be on another machine, so a path there is of no use here.
|
||||
"""
|
||||
import base64
|
||||
if rec.get("encoding") == "base64":
|
||||
return base64.b64decode(rec["content"])
|
||||
return rec["content"].encode()
|
||||
|
||||
def w(s=""):
|
||||
sys.stdout.write(s + "\n"); sys.stdout.flush()
|
||||
|
||||
|
||||
def type_out(s, delay=0.018, color=""):
|
||||
sys.stdout.write(color)
|
||||
for ch in s:
|
||||
sys.stdout.write(ch); sys.stdout.flush(); time.sleep(delay)
|
||||
sys.stdout.write(RST + "\n"); sys.stdout.flush()
|
||||
|
||||
|
||||
def begin(key, title=None):
|
||||
"""Mark the beat start so the narration can be aligned to it later."""
|
||||
t = time.time() - T0
|
||||
with MARKS.open("a") as fh:
|
||||
fh.write(json.dumps({"key": key, "t": round(t, 3)}) + "\n")
|
||||
if title:
|
||||
STEP[0] += 1
|
||||
w(); w(f"{BOLD}{CYAN}{'=' * 74}{RST}")
|
||||
type_out(f" STEP {STEP[0]} {title}", 0.010, BOLD + CYAN)
|
||||
w(f"{BOLD}{CYAN}{'=' * 74}{RST}")
|
||||
return t
|
||||
|
||||
|
||||
def hold(start_t, key):
|
||||
"""Keep this beat on screen until its narration has finished."""
|
||||
want = DUR.get(key, 6.0) + PAD
|
||||
spent = (time.time() - T0) - start_t
|
||||
if spent < want:
|
||||
time.sleep(want - spent)
|
||||
|
||||
|
||||
def show(payload, keep=None, limit=18):
|
||||
if keep:
|
||||
payload = {k: payload[k] for k in keep if k in payload}
|
||||
for line in json.dumps(payload, indent=2, default=str).splitlines()[:limit]:
|
||||
w(f"{DIM} |{RST} {line}")
|
||||
|
||||
|
||||
_sess = winrm.Session(f"http://{CFG['host']}:5985/wsman",
|
||||
auth=(CFG["user"], CFG["password"]), transport="ntlm")
|
||||
|
||||
|
||||
def guest_ps(ps, label):
|
||||
w(f"{YEL} PS {CFG['host']}> {label}{RST}")
|
||||
r = _sess.run_ps(ps)
|
||||
out = r.std_out.decode(errors="replace").strip()
|
||||
for line in out.splitlines():
|
||||
w(f"{DIM} |{RST} {line}")
|
||||
return out
|
||||
|
||||
|
||||
async def main():
|
||||
import asyncio
|
||||
MARKS.unlink(missing_ok=True)
|
||||
|
||||
for n, key in enumerate(("i1", "i2", "i3", "i4"), start=1):
|
||||
t = begin(key)
|
||||
sys.stdout.write(diagram.frame(n)); sys.stdout.write("\n"); sys.stdout.flush()
|
||||
hold(t, key)
|
||||
|
||||
params = StdioServerParameters(
|
||||
command=f"{REPO}/.venv/bin/zerto-rewind-mcp",
|
||||
env={**os.environ, "ZERTO_REWIND_CONFIG": f"{REPO}/config.json"})
|
||||
devnull = open(os.devnull, "w")
|
||||
async with stdio_client(params, errlog=devnull) as (r, s):
|
||||
async with ClientSession(r, s) as sess:
|
||||
t = begin("d1", "Connect to the rewind MCP")
|
||||
await sess.initialize()
|
||||
tools = await sess.list_tools()
|
||||
w(f"{DIM} {len(tools.tools)} tools from zerto_rewind_mcp{RST}")
|
||||
for x in tools.tools:
|
||||
w(f"{DIM} - {x.name}{RST}")
|
||||
hold(t, "d1")
|
||||
|
||||
async def call(name, **args):
|
||||
w(f"{MAG} -> MCP call{RST} {BOLD}{name}{RST}")
|
||||
for k, v in args.items():
|
||||
w(f"{DIM} {k} = {v}{RST}")
|
||||
res = await sess.call_tool(name, args)
|
||||
return json.loads(res.content[0].text)
|
||||
|
||||
t = begin("d2", "The file the agent is about to break")
|
||||
guest_ps(f"Get-Content '{CFG['guest_path']}'", f"Get-Content {CFG['guest_path']}")
|
||||
hold(t, "d2")
|
||||
|
||||
t = begin("d3", "zerto_find_protection")
|
||||
found = await call("zerto_find_protection", query=CFG["vm_query"])
|
||||
show(found, keep=["ok", "outcome", "vm"])
|
||||
if not found.get("ok"):
|
||||
w(f"{RED} not ok, stopping{RST}"); return 1
|
||||
hold(t, "d3")
|
||||
|
||||
t = begin("d4", "zerto_guard_before_mutate")
|
||||
guard = await call("zerto_guard_before_mutate", query=CFG["vm_query"],
|
||||
change_id=CFG["change_id"], agent="claude",
|
||||
action=f"edit {CFG['guest_path']}")
|
||||
show(guard, keep=["ok", "tag", "tagged"])
|
||||
if not guard.get("ok"):
|
||||
w(f"{RED} GUARD FAILED, refusing the change{RST}"); return 1
|
||||
tg = guard["tagged"][0]
|
||||
t_tag = time.strftime("%H:%M:%S")
|
||||
w(f"{GREEN}{BOLD} checkpoint {tg['checkpoint_id']} inserted {t_tag} task={tg['task_state']}{RST}")
|
||||
hold(t, "d4")
|
||||
|
||||
t = begin("d5", "Now the agent makes the bad change")
|
||||
guest_ps(f"Set-Content -Path '{CFG['guest_path']}' -Value '{CFG['bad_content']}' -Encoding ASCII; "
|
||||
f"Get-Content '{CFG['guest_path']}'", f"Set-Content {CFG['guest_path']} ...")
|
||||
t_bad = time.strftime("%H:%M:%S")
|
||||
w(f"{RED}{BOLD} the good config is gone from the guest ({t_bad}){RST}")
|
||||
hold(t, "d5")
|
||||
|
||||
t = begin("d6", "zerto_recover_file without a human yes")
|
||||
deny = await call("zerto_recover_file", vpg_identifier=CFG["vpg_id"],
|
||||
vm_identifier=CFG["vm_identifier"],
|
||||
checkpoint_identifier=tg["checkpoint_id"],
|
||||
guest_path=CFG["guest_path"], confirmed=False)
|
||||
show(deny)
|
||||
w(f"{YEL} refused.{RST}")
|
||||
hold(t, "d6")
|
||||
|
||||
t = begin("d7", "Human says yes: FLR from the pre-mutation checkpoint")
|
||||
w(f"{BOLD} provenance{RST}")
|
||||
w(f" {GREEN}cp {tg['checkpoint_id']} inserted {t_tag}{RST} {DIM}<- guard, BEFORE{RST}")
|
||||
w(f" {RED}bad write {t_bad}{RST} {DIM}<- the mutation, AFTER{RST}")
|
||||
rec = await call("zerto_recover_file", vpg_identifier=CFG["vpg_id"],
|
||||
vm_identifier=CFG["vm_identifier"],
|
||||
checkpoint_identifier=tg["checkpoint_id"],
|
||||
guest_path=CFG["guest_path"], confirmed=True,
|
||||
dest_dir=str(SP / "win_demo_out"))
|
||||
show(rec, keep=["ok", "bytes", "flr_path", "unmount"])
|
||||
if not rec.get("ok"):
|
||||
w(f"{RED} FLR failed{RST}"); return 1
|
||||
body = recovered_bytes(rec).decode()
|
||||
w(f"{YEL} recovered file:{RST}")
|
||||
for line in body.splitlines():
|
||||
w(f"{GREEN}{BOLD} | {line}{RST}")
|
||||
hold(t, "d7")
|
||||
|
||||
t = begin("d8", "Copy it back to the guest")
|
||||
# Ship the recovered bytes verbatim. Set-Content rewrites line
|
||||
# endings and appends one, which makes the restored file differ
|
||||
# from what Zerto handed back. WriteAllBytes does not.
|
||||
import base64
|
||||
blob = recovered_bytes(rec)
|
||||
b64 = base64.b64encode(blob).decode()
|
||||
guest_ps(
|
||||
f"[IO.File]::WriteAllBytes('{CFG['guest_path']}',"
|
||||
f"[Convert]::FromBase64String('{b64}'));"
|
||||
f"Get-Content '{CFG['guest_path']}';"
|
||||
f"'md5: ' + (Get-FileHash '{CFG['guest_path']}' -Algorithm MD5).Hash",
|
||||
f"WriteAllBytes {CFG['guest_path']} <{len(blob)} recovered bytes>")
|
||||
hold(t, "d8")
|
||||
|
||||
t = begin("d9")
|
||||
w(); w(f"{BOLD}{YEL} the same checkpoint, bigger blast radius{RST}")
|
||||
type_out(" one file -> file level recovery (what you just saw)", 0.012, DIM)
|
||||
type_out(" the whole VM -> offsite clone, failover test, or failover", 0.012, DIM)
|
||||
hold(t, "d9")
|
||||
|
||||
t = begin("d10")
|
||||
w(); w(f"{BOLD}{GREEN}{'=' * 74}{RST}")
|
||||
type_out(" REWOUND. The recovery point was the journal.", 0.018, BOLD + GREEN)
|
||||
w(f"{BOLD}{GREEN}{'=' * 74}{RST}")
|
||||
hold(t, "d10")
|
||||
return 0
|
||||
|
||||
import asyncio
|
||||
sys.exit(asyncio.run(main()))
|
||||
+23
-25
@@ -37,19 +37,14 @@ venv that has this package installed.
|
||||
The hook is synchronous: the host waits. That is the point, because the
|
||||
checkpoint has to exist before the change does.
|
||||
|
||||
Budget for the slow path, not the fast one. How long the guard takes is set by
|
||||
the VPG's checkpoint cadence, which is set in turn by its protected site:
|
||||
Budget for the slow path, not the fast one. A successful tag took about 4s
|
||||
against a healthy vSphere-protected VPG, but a **refusal took 63s**, because
|
||||
`wait_for_tag` spends 45s before giving up.
|
||||
|
||||
| protected at | cadence | guard takes |
|
||||
|---|---|---|
|
||||
| vSphere | 5s | ~7s |
|
||||
| Azure | 60s | ~40s |
|
||||
| AWS | 630s | ~111s |
|
||||
So:
|
||||
|
||||
The tag wait is derived from that cadence and capped at 300s, so:
|
||||
|
||||
- `timeout` in settings.json: 360 (seconds)
|
||||
- `ZERTO_HOOK_GUARD_TIMEOUT`: 330 (seconds), kept under it
|
||||
- `timeout` in settings.json: 180 (seconds)
|
||||
- `ZERTO_HOOK_GUARD_TIMEOUT`: 150 (seconds), kept under it
|
||||
|
||||
If the host's timeout fires first it cancels the hook and **discards its
|
||||
output**, and the tool call carries on through the normal permission flow. A
|
||||
@@ -73,23 +68,26 @@ likely to be running unattended.
|
||||
|
||||
`~/.zerto-guard-hook.log`, or `ZERTO_HOOK_LOG`. One line per decision.
|
||||
|
||||
## Why the timeouts are derived, not fixed
|
||||
## Known issue: false denials on cloud-protected VPGs
|
||||
|
||||
This hook used to deny every change to a cloud-protected VM.
|
||||
The `win2019-1` denial above was a **false negative**, and it is worth
|
||||
understanding before relying on this hook in an estate with cloud-protected
|
||||
workloads.
|
||||
|
||||
`wait_for_tag` gave up after a hardcoded 45s. That is generous on a
|
||||
`wait_for_tag` gives up after a hardcoded 45s. That is generous for a
|
||||
vSphere-protected VPG, which checkpoints every 5s and surfaces a tag in about
|
||||
4s, and impossible on an AWS-protected one, where a tag takes ~128s because the
|
||||
journal only checkpoints every 630s.
|
||||
4s. It is far too short elsewhere: a tag takes ~34s to appear on an
|
||||
Azure-protected VPG and ~128s on an AWS-protected one, because journal cadence
|
||||
is set by the protected site (5s vSphere, 60s Azure, 630s AWS).
|
||||
|
||||
So the guard reported "no checkpoint, refusing the change" while Zerto was in the
|
||||
middle of creating one. The checkpoint landed a minute later, in the journal,
|
||||
after the agent had already been told there was no rewind point.
|
||||
So the hook denied the change, and the checkpoint landed anyway. It is in the
|
||||
journal as `cp 56`, timestamped a minute after the hook reported failure. The
|
||||
guard told the agent there was no rewind point while Zerto was in the middle of
|
||||
creating one.
|
||||
|
||||
That is a worse failure than the one this hook exists to prevent. It is silent,
|
||||
it looks correct in the log, and it blocks legitimate work on every
|
||||
cloud-protected VM in the estate.
|
||||
That failure mode is worse than the one the hook guards against, because it is
|
||||
silent and looks correct: legitimate work is refused on every cloud-protected VM
|
||||
while the log reads like the guard is doing its job.
|
||||
|
||||
Both budgets are now derived from the VPG's measured cadence rather than
|
||||
guessed, which is why the numbers above differ by a factor of fifteen between
|
||||
platforms.
|
||||
Until `wait_for_tag` becomes cadence-aware, scope this hook's matcher to
|
||||
vSphere-protected workloads.
|
||||
|
||||
@@ -8,7 +8,7 @@
|
||||
{
|
||||
"type": "command",
|
||||
"command": "/home/you/zerto-ai-rewind/.venv/bin/python /home/you/zerto-ai-rewind/hooks/zerto_guard_hook.py",
|
||||
"timeout": 360
|
||||
"timeout": 180
|
||||
}
|
||||
]
|
||||
}
|
||||
|
||||
@@ -24,7 +24,7 @@ tagged checkpoint and waits for the Zerto task to reach Completed.
|
||||
"matcher": "mcp__.*",
|
||||
"hooks": [{"type": "command",
|
||||
"command": "/path/to/.venv/bin/python /path/to/hooks/zerto_guard_hook.py",
|
||||
"timeout": 360}]}]}}
|
||||
"timeout": 180}]}]}}
|
||||
"""
|
||||
|
||||
from __future__ import annotations
|
||||
@@ -40,11 +40,7 @@ LOG = os.environ.get("ZERTO_HOOK_LOG", os.path.expanduser("~/.zerto-guard-hook.l
|
||||
# Seconds the hook will wait for the checkpoint. Must stay under the hook
|
||||
# timeout configured in settings.json, or the host cancels us and the tool
|
||||
# call proceeds unguarded through the normal permission flow.
|
||||
# Must exceed the largest tag wait the guard can take. That is now derived from
|
||||
# the VPG's checkpoint cadence and capped at 300s (MAX_TAG_TIMEOUT_S), because a
|
||||
# tag takes ~128s to surface on an AWS-protected VPG. Too small a budget here
|
||||
# just moves the false denial from the guard into the hook.
|
||||
GUARD_TIMEOUT_S = float(os.environ.get("ZERTO_HOOK_GUARD_TIMEOUT", "330"))
|
||||
GUARD_TIMEOUT_S = float(os.environ.get("ZERTO_HOOK_GUARD_TIMEOUT", "150"))
|
||||
UNKNOWN_DECISION = os.environ.get("ZERTO_HOOK_UNKNOWN", "prompt") # prompt | allow | deny
|
||||
|
||||
|
||||
|
||||
@@ -4,7 +4,6 @@ from __future__ import annotations
|
||||
|
||||
import asyncio
|
||||
import re
|
||||
import statistics
|
||||
from datetime import UTC, datetime
|
||||
from typing import Any
|
||||
|
||||
@@ -24,15 +23,6 @@ _WS = re.compile(r"\s+")
|
||||
# so the name stays readable in the Zerto UI checkpoint list.
|
||||
TAG_MAX_LEN = 250
|
||||
|
||||
# Tag-wait budget. Checkpoint cadence is set by the VPG's protected site and
|
||||
# measured 5s (vSphere), 60s (Azure) and 630s (AWS) in one estate, so the wait
|
||||
# has to be derived rather than fixed.
|
||||
DEFAULT_TAG_TIMEOUT_S = 45.0 # cadence unmeasurable; the old constant
|
||||
MIN_TAG_TIMEOUT_S = 45.0
|
||||
MAX_TAG_TIMEOUT_S = 300.0 # AWS needed 128s; this leaves real headroom
|
||||
MIN_POLL_INTERVAL_S = 1.5
|
||||
MAX_POLL_INTERVAL_S = 15.0
|
||||
|
||||
|
||||
def _clean(value: Any, limit: int) -> str:
|
||||
"""One field of a checkpoint name: single-line, no separator collisions."""
|
||||
@@ -84,81 +74,29 @@ def checkpoint_id(row: dict[str, Any]) -> str:
|
||||
return str(value) if value is not None else ""
|
||||
|
||||
|
||||
def checkpoint_gaps(rows: list[dict[str, Any]], sample: int = 20) -> list[float]:
|
||||
"""Seconds between consecutive checkpoints, newest `sample` of them."""
|
||||
stamps: list[datetime] = []
|
||||
for row in rows[-sample:]:
|
||||
raw = str(pick(row, "TimeStamp", "Timestamp", "timestamp") or "")
|
||||
try:
|
||||
stamps.append(datetime.fromisoformat(raw))
|
||||
except ValueError:
|
||||
continue
|
||||
return [
|
||||
(stamps[i + 1] - stamps[i]).total_seconds()
|
||||
for i in range(len(stamps) - 1)
|
||||
if stamps[i + 1] >= stamps[i]
|
||||
]
|
||||
|
||||
|
||||
def cadence_seconds(rows: list[dict[str, Any]], sample: int = 20) -> float | None:
|
||||
"""How often this VPG writes a checkpoint. None when it cannot be measured."""
|
||||
gaps = checkpoint_gaps(rows, sample)
|
||||
return statistics.median(gaps) if gaps else None
|
||||
|
||||
|
||||
def tag_wait_budget(cadence: float | None) -> tuple[float, float]:
|
||||
"""How long to wait for a tag, and how often to look, given the cadence.
|
||||
|
||||
Cadence is set by the VPG's PROTECTED site, and the spread is enormous:
|
||||
measured 5s on vSphere, 60s on Azure, 630s on AWS. A single constant cannot
|
||||
serve all three. The old fixed 45s was generous for vSphere and impossible
|
||||
for AWS, where a tag took 128s to surface, so the guard reported "no
|
||||
checkpoint" while Zerto was still creating one and the change was refused
|
||||
for no reason.
|
||||
|
||||
Visibility does not scale linearly with cadence (the insert makes its own
|
||||
off-cadence checkpoint), so this is 2x cadence plus headroom, clamped.
|
||||
"""
|
||||
if cadence is None or cadence <= 0:
|
||||
return DEFAULT_TAG_TIMEOUT_S, MIN_POLL_INTERVAL_S
|
||||
timeout = min(max(2 * cadence + 30, MIN_TAG_TIMEOUT_S), MAX_TAG_TIMEOUT_S)
|
||||
interval = min(max(cadence / 10, MIN_POLL_INTERVAL_S), MAX_POLL_INTERVAL_S)
|
||||
return timeout, interval
|
||||
|
||||
|
||||
async def wait_for_tag(
|
||||
client: ZertoClient,
|
||||
vpg_identifier: str,
|
||||
tag: str,
|
||||
*,
|
||||
timeout_s: float | None = None,
|
||||
interval_s: float | None = None,
|
||||
timeout_s: float = 45.0,
|
||||
interval_s: float = 1.5,
|
||||
) -> dict[str, Any]:
|
||||
"""Wait until the tag is listed. Budget derived from the VPG's own cadence."""
|
||||
rows = await client.list_checkpoints(vpg_identifier)
|
||||
for row in rows:
|
||||
if checkpoint_tag(row) == tag:
|
||||
return row
|
||||
|
||||
cadence = cadence_seconds(rows)
|
||||
budget, poll = tag_wait_budget(cadence)
|
||||
timeout_s = budget if timeout_s is None else timeout_s
|
||||
interval_s = poll if interval_s is None else interval_s
|
||||
|
||||
deadline = asyncio.get_event_loop().time() + timeout_s
|
||||
last: list[dict[str, Any]] = []
|
||||
while asyncio.get_event_loop().time() < deadline:
|
||||
await asyncio.sleep(interval_s)
|
||||
rows = await client.list_checkpoints(vpg_identifier)
|
||||
for row in rows:
|
||||
last = await client.list_checkpoints(vpg_identifier)
|
||||
for row in last:
|
||||
if checkpoint_tag(row) == tag:
|
||||
return row
|
||||
measured = f"{cadence:.0f}s" if cadence else "unknown"
|
||||
await asyncio.sleep(interval_s)
|
||||
raise ZertoError(
|
||||
f"Tagged checkpoint {tag!r} did not appear on VPG {vpg_identifier} "
|
||||
f"within {timeout_s:.0f}s (this VPG checkpoints about every {measured}). "
|
||||
"Do not mutate. Check the Zerto task before assuming the insert failed: "
|
||||
"a completed task with no visible checkpoint means the wait was short, "
|
||||
"not that the insert was rejected."
|
||||
f"within {timeout_s:.0f}s. Do not mutate. "
|
||||
"On a cloud-protected VPG the tag routinely takes longer than this to appear "
|
||||
"(measured ~34s on Azure, ~128s on AWS), so this timeout may simply be too "
|
||||
"short rather than the insert having failed. Check the Zerto task before "
|
||||
"assuming it did not land."
|
||||
)
|
||||
|
||||
|
||||
|
||||
@@ -2,8 +2,6 @@
|
||||
|
||||
from __future__ import annotations
|
||||
|
||||
import base64
|
||||
import hashlib
|
||||
import json
|
||||
from pathlib import Path
|
||||
from typing import Any
|
||||
@@ -34,20 +32,6 @@ _catalog: MutatingCatalog | None = None
|
||||
_settings: dict[str, Any] = {}
|
||||
|
||||
|
||||
# Files above this are refused rather than streamed through a tool result.
|
||||
# FLR is for a config file or a dropped directory; a disk image belongs on the
|
||||
# whole-VM ladder in docs/recover-ladder.md.
|
||||
MAX_RECOVER_BYTES = 1_048_576
|
||||
|
||||
|
||||
def _encode_recovered(blob: bytes) -> dict[str, Any]:
|
||||
"""Text where it is text, base64 otherwise, so the caller can just use it."""
|
||||
try:
|
||||
return {"encoding": "text", "content": blob.decode("utf-8")}
|
||||
except UnicodeDecodeError:
|
||||
return {"encoding": "base64", "content": base64.b64encode(blob).decode("ascii")}
|
||||
|
||||
|
||||
def _dump(payload: Any) -> str:
|
||||
return json.dumps(payload, indent=2, default=str)
|
||||
|
||||
@@ -463,20 +447,16 @@ async def zerto_recover_file(
|
||||
checkpoint_identifier: str,
|
||||
guest_path: str,
|
||||
confirmed: bool = False,
|
||||
dest_dir: str | None = None,
|
||||
) -> str:
|
||||
"""File-level recovery from a journal checkpoint. The VM stays up.
|
||||
|
||||
Returns the file CONTENT, not a path. The caller may be on another machine,
|
||||
so a path on this host is of no use to them, and letting a caller choose
|
||||
where bytes land is an arbitrary write once this server is shared.
|
||||
|
||||
Requires confirmed=true (human yes). Cannot run during clone/test/live/EJC.
|
||||
10.9 FLR Operator role fails; use an Administrator account.
|
||||
|
||||
Locally replicated VPGs only. FLR is performed at the VPG's recovery site,
|
||||
so a VPG replicating to a cloud ZCA must be recovered from that ZCA's API.
|
||||
guest_path is the path on the guest: /home/x/f.conf or C:\\Users\\x\\f.txt.
|
||||
Files larger than max_recover_bytes are refused; use the whole-VM ladder.
|
||||
"""
|
||||
if not confirmed:
|
||||
return _dump(
|
||||
@@ -492,10 +472,7 @@ async def zerto_recover_file(
|
||||
gate = await _flr_site_gate(client, vpg_identifier)
|
||||
if not gate.get("ok"):
|
||||
return _dump(gate)
|
||||
# Server-owned, from config only. This string is also handed to the
|
||||
# appliance as initialDownloadPath, so a caller-supplied value would let a
|
||||
# caller point the ZVM at a path of their choosing.
|
||||
dest = Path(_settings.get("recovery_dir") or "./recovered")
|
||||
dest = Path(dest_dir or _settings.get("recovery_dir") or "./recovered")
|
||||
dest.mkdir(parents=True, exist_ok=True)
|
||||
session_id: str | None = None
|
||||
before = await _live_session_ids(client)
|
||||
@@ -514,29 +491,15 @@ async def zerto_recover_file(
|
||||
token = download_token_from(token_payload)
|
||||
blob = await client.fetch_download(token)
|
||||
name = Path(guest_path.replace("\\", "/")).name or "recovered.bin"
|
||||
limit = int(_settings.get("max_recover_bytes") or MAX_RECOVER_BYTES)
|
||||
if len(blob) > limit:
|
||||
payload = {
|
||||
"ok": False,
|
||||
"too_large": True,
|
||||
"bytes": len(blob),
|
||||
"limit": limit,
|
||||
"message": (
|
||||
f"{name} is {len(blob)} bytes, over the {limit} byte limit for "
|
||||
"file level recovery. Use a bounded whole-VM operation instead: "
|
||||
"offsite clone or failover test."
|
||||
),
|
||||
}
|
||||
else:
|
||||
out_path = dest / name
|
||||
out_path.write_bytes(blob)
|
||||
payload = {
|
||||
"ok": True,
|
||||
"name": name,
|
||||
"path": str(out_path.resolve()),
|
||||
"bytes": len(blob),
|
||||
"sha256": hashlib.sha256(blob).hexdigest(),
|
||||
"session_id": session_id,
|
||||
"flr_path": flr_path,
|
||||
**_encode_recovered(blob),
|
||||
"message": f"Recovered {len(blob)} bytes of {name} from the journal.",
|
||||
"message": f"Wrote {len(blob)} bytes to {out_path}",
|
||||
}
|
||||
except ZertoError as exc:
|
||||
payload = {"ok": False, "session_id": session_id, "message": str(exc)}
|
||||
|
||||
@@ -1,7 +1,5 @@
|
||||
from datetime import UTC, datetime
|
||||
|
||||
import pytest
|
||||
|
||||
from zerto_rewind_mcp.checkpoints import (
|
||||
TAG_MAX_LEN,
|
||||
checkpoint_id,
|
||||
@@ -52,93 +50,3 @@ def test_checkpoint_row_keys():
|
||||
row2 = {"checkpointId": "cp-2", "tag": "t"}
|
||||
assert checkpoint_id(row2) == "cp-2"
|
||||
assert checkpoint_tag(row2) == "t"
|
||||
|
||||
|
||||
def _rows(*offsets_seconds):
|
||||
from datetime import timedelta
|
||||
|
||||
base = datetime(2026, 9, 22, 12, 0, 0, tzinfo=UTC)
|
||||
return [
|
||||
{"TimeStamp": (base + timedelta(seconds=o)).isoformat().replace("+00:00", "Z")}
|
||||
for o in offsets_seconds
|
||||
]
|
||||
|
||||
|
||||
def test_cadence_measures_the_median_gap():
|
||||
from zerto_rewind_mcp.checkpoints import cadence_seconds
|
||||
|
||||
assert cadence_seconds(_rows(0, 5, 10, 15, 20)) == 5.0
|
||||
assert cadence_seconds(_rows(0, 60, 120, 180)) == 60.0
|
||||
# one irregular gap must not drag the answer around
|
||||
assert cadence_seconds(_rows(0, 5, 10, 400, 405, 410)) == 5.0
|
||||
|
||||
|
||||
def test_cadence_is_none_when_unmeasurable():
|
||||
from zerto_rewind_mcp.checkpoints import cadence_seconds
|
||||
|
||||
assert cadence_seconds([]) is None
|
||||
assert cadence_seconds([{"TimeStamp": "not-a-date"}]) is None
|
||||
assert cadence_seconds(_rows(0)) is None # one checkpoint gives no gap
|
||||
|
||||
|
||||
def test_tag_wait_budget_covers_every_measured_platform():
|
||||
"""The three cadences measured in one estate, and what each actually needed."""
|
||||
from zerto_rewind_mcp.checkpoints import tag_wait_budget
|
||||
|
||||
for cadence, observed_visibility in ((5.0, 4.0), (60.0, 34.0), (630.0, 128.0)):
|
||||
budget, interval = tag_wait_budget(cadence)
|
||||
assert budget > observed_visibility, (
|
||||
f"cadence {cadence}s budgets {budget}s but the tag took {observed_visibility}s"
|
||||
)
|
||||
assert interval >= 1.5
|
||||
|
||||
|
||||
def test_tag_wait_budget_is_clamped_at_both_ends():
|
||||
from zerto_rewind_mcp.checkpoints import (
|
||||
DEFAULT_TAG_TIMEOUT_S,
|
||||
MAX_TAG_TIMEOUT_S,
|
||||
MIN_TAG_TIMEOUT_S,
|
||||
tag_wait_budget,
|
||||
)
|
||||
|
||||
assert tag_wait_budget(0.1)[0] == MIN_TAG_TIMEOUT_S # absurdly fast VPG
|
||||
assert tag_wait_budget(100_000)[0] == MAX_TAG_TIMEOUT_S # absurdly slow one
|
||||
assert tag_wait_budget(None)[0] == DEFAULT_TAG_TIMEOUT_S
|
||||
assert tag_wait_budget(None)[1] == 1.5
|
||||
|
||||
|
||||
def test_wait_for_tag_returns_immediately_when_already_present():
|
||||
import asyncio
|
||||
|
||||
from zerto_rewind_mcp.checkpoints import wait_for_tag
|
||||
|
||||
class Client:
|
||||
def __init__(self):
|
||||
self.calls = 0
|
||||
|
||||
async def list_checkpoints(self, vpg):
|
||||
self.calls += 1
|
||||
return [{"Tag": "ai:x", "CheckpointId": "7"}]
|
||||
|
||||
c = Client()
|
||||
row = asyncio.run(wait_for_tag(c, "vpg", "ai:x"))
|
||||
assert row["CheckpointId"] == "7"
|
||||
assert c.calls == 1 # no sleep, no second poll
|
||||
|
||||
|
||||
def test_wait_for_tag_error_names_the_measured_cadence():
|
||||
import asyncio
|
||||
|
||||
from zerto_rewind_mcp.checkpoints import wait_for_tag
|
||||
from zerto_rewind_mcp.client import ZertoError
|
||||
|
||||
class Client:
|
||||
async def list_checkpoints(self, vpg):
|
||||
return _rows(0, 60, 120, 180) # 60s cadence, tag never appears
|
||||
|
||||
with pytest.raises(ZertoError) as err:
|
||||
# explicit tiny timeout so the test does not actually wait 150s
|
||||
asyncio.run(wait_for_tag(Client(), "vpg", "ai:missing", timeout_s=0.01, interval_s=0.01))
|
||||
msg = str(err.value)
|
||||
assert "about every 60s" in msg
|
||||
assert "was short, not that the insert was rejected" in msg
|
||||
|
||||
@@ -256,44 +256,3 @@ def test_flr_gate_refuses_remote_recovery_site_and_names_it():
|
||||
# must tell the operator where the operation actually lives
|
||||
assert out["recovery_site"] == "aws-zca"
|
||||
assert "aws-zca" in out["message"]
|
||||
|
||||
|
||||
def test_encode_recovered_text_and_binary():
|
||||
from zerto_rewind_mcp.server import _encode_recovered
|
||||
|
||||
text = _encode_recovered(b"listen: 0.0.0.0:8443\n")
|
||||
assert text["encoding"] == "text"
|
||||
assert text["content"] == "listen: 0.0.0.0:8443\n"
|
||||
|
||||
binary = _encode_recovered(b"\x89PNG\r\n\x1a\n\xff\xfe")
|
||||
assert binary["encoding"] == "base64"
|
||||
import base64 as b64
|
||||
|
||||
assert b64.b64decode(binary["content"]) == b"\x89PNG\r\n\x1a\n\xff\xfe"
|
||||
|
||||
|
||||
def test_recover_file_takes_no_caller_destination():
|
||||
"""The caller must not choose where bytes land, nor where the ZVM mounts.
|
||||
|
||||
dest_dir used to be a tool parameter whose value was also passed to the
|
||||
appliance as initialDownloadPath.
|
||||
"""
|
||||
import inspect
|
||||
|
||||
from zerto_rewind_mcp.server import zerto_recover_file
|
||||
|
||||
params = set(inspect.signature(zerto_recover_file).parameters)
|
||||
assert "dest_dir" not in params
|
||||
assert params == {
|
||||
"vpg_identifier",
|
||||
"vm_identifier",
|
||||
"checkpoint_identifier",
|
||||
"guest_path",
|
||||
"confirmed",
|
||||
}
|
||||
|
||||
|
||||
def test_recover_byte_cap_is_configurable_and_has_a_default():
|
||||
from zerto_rewind_mcp.server import MAX_RECOVER_BYTES
|
||||
|
||||
assert MAX_RECOVER_BYTES == 1_048_576
|
||||
|
||||
Reference in New Issue
Block a user