Using supervisord to start services.

build/Dockerfile

@@ -26,6 +26,7 @@ RUN apt-get update \
     sqlite3 \
     ssl-cert \
     telnet \
+    supervisor \
     && rm -rf /var/lib/apt/lists/*
 
 ENV MAILTRAP_USER mailtrap
@@ -62,6 +63,9 @@ RUN mkdir -p /var/lib/roundcube/db && \
 # API
 COPY root/usr/share/roundcube/api.php /usr/share/roundcube/
 
+# Supervisord
+COPY root/etc/supervisor/conf.d/supervisord.conf /etc/supervisor/conf.d/supervisord.conf
+
 COPY root/docker-entrypoint.sh /
 RUN chmod 777 /docker-entrypoint.sh
 

build/root/docker-entrypoint.sh

@@ -1,4 +1,21 @@
 #!/usr/bin/env bash
+set -e
+
+# ln_if_file_exists src dest
+function ln_if_file_exists () {
+    if [ -e "$1" ]; then
+        ln -sf "$1" "$2"
+    fi
+}
+
+# Symlink logfiles
+ln_if_file_exists "/dev/null" "/var/log/mail.err"
+ln_if_file_exists "/dev/null" "/var/log/mail.info"
+ln_if_file_exists "/dev/null" "/var/log/mail.log"
+ln_if_file_exists "/dev/null" "/var/log/mail.warn"
+#ln_if_file_exists "/dev/null" "/var/log/auth.log"
+ln_if_file_exists "/proc/1/fd/1" "/var/log/auth.log"
+ln_if_file_exists "/proc/1/fd/1" "/var/log/syslog"
 
 # Setup roundcube des_key
 RC_DES_KEY=`cat /dev/urandom | head -n 256 | sha256sum | awk '{print $1}'`;
@@ -38,10 +55,4 @@ newaliases
 postmap /etc/postfix/transport
 
 # Start services
-service rsyslog start
-service dovecot start
-service postfix start
-service php8.2-fpm start
-service nginx start
-
-touch /var/log/mail.err /var/log/mail.log && tail -f /var/log/mail.err /var/log/mail.log
+/usr/bin/supervisord

build/root/etc/supervisor/conf.d/supervisord.conf

@@ -0,0 +1,25 @@
+[supervisord]
+user=root
+nodaemon=true
+logfile=/dev/null
+logfile_maxbytes=0
+user=root
+stdout_logfile=/dev/fd/1
+stdout_logfile_maxbytes=0
+redirect_stderr=true
+autorestart=true
+
+[program:rsyslog]
+command=/usr/sbin/rsyslogd -n
+
+[program:dovecot]
+command=/usr/sbin/dovecot -c /etc/dovecot/dovecot.conf -F
+
+[program:postfix]
+command=/usr/sbin/postfix start-fg
+
+[program:php8.2-fpm]
+command=/usr/sbin/php-fpm8.2 --nodaemonize --fpm-config=/etc/php/8.2/fpm/pool.d/www.conf
+
+[program:nginx]
+command=/usr/sbin/nginx -g "daemon off;"

docker-compose.example.yml

@@ -2,7 +2,6 @@ version: "3"
 services:
   mailtrap:
     image: dbck/mailtrap:latest
-    init: true
     environment:
       - TZ=Europe/Berlin
       - MAILTRAP_USER=username