mix
8ce050ef7f
Initial feature-complete implementation of the v1.0 specification (phases 0-11 of `docs/implementation-plan.md`). Added: - Panel (Go, single static binary) with SQLite persistence, one-time - Domain management with per-domain DKIM (RSA-2048, generated in pure Go) and - Application (sender identity) management: SASL credentials via `sasldb2`, - Full Postfix relay config generated from env at container start: SMTPS 465, - Journal milter (pure Go, `go-milter`) recording every send to `send_log`; … (6 more in CHANGELOG) Full detail: CHANGELOG.md (0.1.0).
48 lines
1.4 KiB
Python
48 lines
1.4 KiB
Python
#!/usr/bin/env python3
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"""Supervisor event listener: bring the container down on unrecoverable failure.
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If any managed program exhausts its restart retries and enters FATAL, this
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listener signals supervisord (its parent) to terminate, so the whole container
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exits and Docker's `restart` policy can recreate it cleanly — rather than
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lingering "alive" with a dead Postfix/OpenDKIM/panel (spec 4).
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Communication with supervisord uses the event listener protocol over stdin and
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stdout, so stdout must carry only protocol tokens.
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"""
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import os
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import signal
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import sys
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def write_stdout(s):
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sys.stdout.write(s)
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sys.stdout.flush()
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def main():
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while True:
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# Tell supervisord we are ready for the next event.
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write_stdout("READY\n")
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line = sys.stdin.readline()
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if not line:
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return
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headers = dict(pair.split(":", 1) for pair in line.split())
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payload_len = int(headers.get("len", 0))
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if payload_len:
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sys.stdin.read(payload_len)
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# We only subscribe to PROCESS_STATE_FATAL, so any event means a managed
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# program can no longer be restarted. Take the container down.
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sys.stderr.write(
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"crashexit: a managed process entered FATAL; shutting down container\n"
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)
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sys.stderr.flush()
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os.kill(os.getppid(), signal.SIGTERM)
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write_stdout("RESULT 2\nOK")
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if __name__ == "__main__":
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main()
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