Matt Mabrey
6c1dc7d45f
- scripts/entrypoint.sh (new): prefers the live bind-mounted backup-cron.sh, but falls back to a copy baked into the image at build time if the mount is missing. If neither exists, it stays up and idle (instead of crash-looping) so the container remains reachable via console/exec for diagnosis. - scripts/backup-cron.sh (updated): resolves db-backup.sh the same live-or-fallback way, re-checked on every loop iteration, so if the bind mount comes back healthy later, this container picks up the live scripts on its next backup run with no restart needed. - scripts/backup.Dockerfile (updated): bakes all three scripts into the image under /app/scripts-default/ as the fallback, and sets the new wrapper as ENTRYPOINT.
36 lines
1.3 KiB
Bash
36 lines
1.3 KiB
Bash
#!/bin/sh
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# Entry point for the `backup` sidecar container's periodic loop. Runs
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# db-backup.sh on a fixed interval (default: daily) -- a sleep loop instead of
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# a cron daemon, kept deliberately simple so it works in a bare
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# postgres:16-alpine image.
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#
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# Resolves db-backup.sh the same way entrypoint.sh resolves this file: prefer
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# the live bind-mounted copy at /scripts (so edits don't need a rebuild), fall
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# back to the copy baked into the image at build time if the mount is
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# missing, empty, or stale. Resolving fresh on every loop iteration also means
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# that if the mount comes back healthy later (e.g. someone fixes the host
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# directory) this container picks it up on the very next run, with no
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# restart needed.
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set -eu
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resolve() {
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# $1 = script filename, e.g. db-backup.sh
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if [ -f "/scripts/$1" ]; then
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echo "/scripts/$1"
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else
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echo "/app/scripts-default/$1"
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fi
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}
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INTERVAL="${BACKUP_INTERVAL_SECONDS:-86400}" # 86400 = once a day
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echo "[backup] sidecar started; interval=${INTERVAL}s, keep=${BACKUP_KEEP:-14}, dir=${BACKUP_DIR:-/backups}"
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# Take one backup shortly after start so a freshly-deployed stack has an
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# immediate restore point instead of waiting a whole interval.
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sleep 20
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while true; do
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DB_BACKUP="$(resolve db-backup.sh)"
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sh "$DB_BACKUP" || echo "[backup] run failed; will retry next interval" >&2
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sleep "$INTERVAL"
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done
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