Audiobuzz
693cf94695
Split-horizon DNS made lego's propagation check query the container's internal resolver, which doesn't serve the public _acme-challenge TXT record, so the challenge timed out. Add ACME_RESOLVERS (comma-separated host:port, default 8.8.8.8:53) → one --dns.resolvers flag each. Documented in .env + DEPLOY.md.
69 lines
3.0 KiB
Bash
Executable File
69 lines
3.0 KiB
Bash
Executable File
#!/bin/sh
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# renew-loop.sh — admin-UI cert issue/renew loop for the `acme` side-car.
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#
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# Runs inside the goacme/lego image (alpine-based). Obtains the fleet-manager
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# admin-UI cert from Let's Encrypt via DNS-01 over AWS Route 53, and writes it
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# into /out — bind-mounted to the SAME ./pki/admin dir the manager reads, so the
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# manager's certReloader hot-swaps it on the next mtime bump (NO restart).
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#
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# The UI is on the mgmt network (not internet-reachable), so only DNS-01 can
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# validate; Route 53 automates the _acme-challenge TXT record via the AWS API.
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# lego renews only within --days of expiry, so this can loop harmlessly.
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#
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# Env (from compose/.env): ACME_DOMAIN, ACME_EMAIL, AWS_* creds (or an instance
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# role), optional ACME_STAGING=1 for a dry-run against LE staging.
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set -eu
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DOMAIN=${ACME_DOMAIN:?set ACME_DOMAIN}
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EMAIL=${ACME_EMAIL:?set ACME_EMAIL}
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UID_OUT=${RUNTIME_UID:-65532} # distroless "nonroot" — must be able to read the key
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INTERVAL_OK=${INTERVAL_OK:-43200} # 12h between checks after success
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INTERVAL_ERR=${INTERVAL_ERR:-3600} # 1h retry after a failure
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STAGING=""
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[ -n "${ACME_STAGING:-}" ] && {
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STAGING="--server https://acme-staging-v02.api.letsencrypt.org/directory"
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echo "acme: using LE STAGING — certs are UNTRUSTED (dry run)"
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}
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# The goacme/lego image ships the binary at /lego (not on PATH); fall back to it
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# when we've overridden the entrypoint with the shell.
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LEGO=$(command -v lego 2>/dev/null || true)
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[ -z "$LEGO" ] && [ -x /lego ] && LEGO=/lego
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[ -z "$LEGO" ] && { echo "acme: FATAL lego binary not found (looked on PATH and /lego)"; exit 1; }
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# Force the DNS-01 propagation check against a PUBLIC resolver — the container's
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# internal/split-horizon DNS doesn't serve the public _acme-challenge record, so
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# lego's default (system resolver) never sees the TXT and times out. Accepts a
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# comma-separated list of host:port; each becomes a --dns.resolvers flag.
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RESOLVERS=""
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if [ -n "${ACME_RESOLVERS:-}" ]; then
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OLDIFS=$IFS; IFS=','
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for r in $ACME_RESOLVERS; do RESOLVERS="$RESOLVERS --dns.resolvers $r"; done
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IFS=$OLDIFS
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fi
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while true; do
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# First pass issues; later passes renew when near expiry.
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if [ -f "/le/certificates/$DOMAIN.crt" ]; then
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set -- renew --days 30
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else
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set -- run
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fi
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echo "acme: lego $* for $DOMAIN (Route 53 DNS-01)"
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# shellcheck disable=SC2086 # $STAGING/$RESOLVERS intentionally word-split
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if "$LEGO" --accept-tos --email "$EMAIL" --dns route53 --domains "$DOMAIN" \
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--path /le $RESOLVERS $STAGING "$@"; then
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install -m 644 "/le/certificates/$DOMAIN.crt" /out/fullchain.pem
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install -m 600 "/le/certificates/$DOMAIN.key" /out/privkey.pem
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chown "$UID_OUT:$UID_OUT" /out/fullchain.pem /out/privkey.pem 2>/dev/null \
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|| echo "acme: WARN could not chown to $UID_OUT (manager may not read the key)"
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echo "acme: staged /out/{fullchain,privkey}.pem; next check in ${INTERVAL_OK}s"
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sleep "$INTERVAL_OK"
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else
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echo "acme: lego FAILED (check AWS creds / zone perms); retry in ${INTERVAL_ERR}s"
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sleep "$INTERVAL_ERR"
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fi
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done
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