79 lines
3.2 KiB
PowerShell
79 lines
3.2 KiB
PowerShell
<#
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.SYNOPSIS
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Zerto post-failover script. Fires the on-prem Webhook Server which does
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the real work (DNS updates, service health checks, notifications).
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.DESCRIPTION
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Designed to be dropped into a Zerto VPG's post-recovery script slot. The
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Zerto Virtual Manager's PowerShell runner has a limited module set and
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runs scripts synchronously, so this script:
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- uses curl.exe (ships with Windows 10 1803+ / Server 2019+) instead
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of any module-dependent HTTP client;
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- calls an ASYNC webhook endpoint - the server returns 202 in
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milliseconds and runs the actual work in the background;
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- returns within seconds regardless of how long the post-failover
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actions take, so Zerto's failover sequence is never blocked.
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Wire this into your VPG via the Zerto UI:
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VPG settings -> Recovery -> Scripts -> Post-Recovery Script
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Path: C:\path\to\zerto-post-failover.ps1
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Parameters: leave empty (we read from $env:ZertoVPGName)
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.NOTES
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Configure $WebhookUrl and either:
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- paste the bearer token directly into $Bearer (simplest, but the
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token then lives in this file), or
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- point $BearerFile at a file readable only by the ZVM service
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account (better - same threat model as Zerto's own credential
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storage).
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#>
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$ErrorActionPreference = 'Stop'
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# ----------------------------- CONFIGURE ---------------------------------
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$WebhookUrl = 'http://webhook.contoso.local:8080/hook/post-failover'
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$Bearer = '' # paste here, or use $BearerFile
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$BearerFile = 'C:\ProgramData\Zerto\webhook-token.txt' # one line: the token
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# -------------------------------------------------------------------------
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if (-not $Bearer -and (Test-Path $BearerFile)) {
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$Bearer = (Get-Content -LiteralPath $BearerFile -TotalCount 1).Trim()
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}
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if (-not $Bearer) {
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throw "No bearer token. Set `$Bearer in this script or write the token to $BearerFile."
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}
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# Compose the payload. Zerto exposes a few env vars; fall back gracefully.
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$payload = @{
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operation = 'failover'
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vpg = if ($env:ZertoVPGName) { $env:ZertoVPGName } else { 'unknown' }
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timestamp = (Get-Date).ToUniversalTime().ToString('o')
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} | ConvertTo-Json -Compress
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# curl on Windows handles long / quoted JSON better via @file than via -d "...".
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$tempBody = Join-Path $env:TEMP ("zerto-webhook-{0}.json" -f ([guid]::NewGuid()))
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$payload | Out-File -FilePath $tempBody -Encoding utf8 -NoNewline
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try {
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Write-Host "POST $WebhookUrl (vpg=$($env:ZertoVPGName))"
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& curl.exe `
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--silent --show-error --fail-with-body `
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--max-time 10 `
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-X POST `
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-H "Authorization: Bearer $Bearer" `
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-H "Content-Type: application/json" `
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-d "@$tempBody" `
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"$WebhookUrl"
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if ($LASTEXITCODE -ne 0) {
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# curl prints its own error to stderr; surface a non-zero exit so Zerto's
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# script log records the failure but we don't block the failover.
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Write-Warning "Webhook call failed with curl exit $LASTEXITCODE; continuing."
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} else {
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Write-Host "Webhook accepted (run id is in the response above)."
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}
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}
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finally {
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Remove-Item $tempBody -ErrorAction SilentlyContinue
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}
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