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Hooks

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Events

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Configuration

services:
  postgres:
    command: "postgres -D /var/lib/postgres"
    hooks:
      onstart:
        command: "echo 'Postgres started'"
        timeout: "10s"
      onerr:
        command: "/usr/local/bin/report-crash postgres"

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Execution

• Run via sh -c
• Fire-and-forget (no retries)
• Timeout kills with SIGKILL
• Failures logged but don’t affect service

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Behavior

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Tips

• Keep commands short
• Use env vars for secrets
• Make repeated actions idempotent