REL-0.1 Initial Release

Dockerfiles/prod/data/postfix.sh

@@ -0,0 +1,95 @@
+#!/usr/bin/env bash
+#
+# Wrapper to have postfix run in foreground
+# mode in order to be called by supvervisord
+#
+#
+# CREDITS:
+# This script is mostly based on the following Gist:
+# https://gist.github.com/chrisnew/b0c1b8d310fc5ceaeac4
+#
+
+
+
+###
+### Be strict
+###
+set -e
+set -u
+set -o pipefail
+
+
+###
+### Variables
+###
+if [ -f "/etc/alpine-release" ]; then
+	MAILLOG="/var/log/maillog"
+elif [ -f "/etc/debian_version" ]; then
+	MAILLOG="/var/log/mail.log"
+else
+	MAILLOG="/var/log/maillog"
+fi
+
+MAILPID="/var/spool/postfix/pid/master.pid"
+
+
+###
+### Sanity checks
+###
+if ! command -v pidof >/dev/null 2>&1; then
+	echo "pidof is required for cleaning up tail command."
+	exit 1
+fi
+
+# Give rsyslogd some time to start up
+sleep 2
+
+if ! pidof rsyslogd >/dev/null 2>&1; then
+	echo "rsyslogd is not running, but required for mail logging."
+	exit 1
+fi
+
+# force new copy of hosts there (otherwise links could be outdated)
+# TODO: check if required
+#cp /etc/hosts /var/spool/postfix/etc/hosts
+
+
+###
+### Trap signals
+###
+trap "postfix stop" SIGINT
+trap "postfix stop" SIGTERM
+trap "postfix reload" SIGHUP
+
+
+###
+### Startup
+###
+
+# start postfix
+postfix start
+
+# Capture output
+tail -qF -n 0 "${MAILLOG}" &
+tail_pid="${?}"
+
+
+###
+### Warm-up time
+###
+sleep 3
+
+
+###
+### Wait for kill signales
+###
+while kill -0 "$(cat "${MAILPID}")" >/dev/null 2>&1; do
+	# Check every second
+	sleep 1
+done
+
+
+###
+### Clean-up
+###
+kill "${tail_pid}"