New approach to Gogs Docker Container

- VOLUME for ‘/data’
- Usage of S6 as PID 1 Process
- Usage of ‘socat’ so linked container (like databases) are binded to
localhost
- OpenSSH, Socat Link and Gogs are supervised using S6
- Size of container reduced to ~75Mo

docker/start.sh

@@ -1,43 +1,12 @@
-#!/bin/bash -
-#
+#!/bin/sh
 
-if ! test -d /data/gogs
-then
-	mkdir -p /var/run/sshd
-	mkdir -p /data/gogs/data /data/gogs/conf /data/gogs/log /data/git
-fi
+# Bind linked docker container to localhost socket using socat
+env | sed -En 's|(.*)_PORT_([0-9]*)_TCP=tcp://(.*):(.*)|\1_\2 socat -ls TCP4-LISTEN:\2,fork,reuseaddr TCP4:\3:\4|p' | \
+while read NAME CMD; do
+    mkdir -p /app/gogs/docker/s6/$NAME
+    echo -e "#!/bin/sh\nexec $CMD" > /app/gogs/docker/s6/$NAME/run
+    chmod +x /app/gogs/docker/s6/$NAME/run
+done
 
-if ! test -d /data/ssh
-then
-	mkdir /data/ssh
-	ssh-keygen -q -f /data/ssh/ssh_host_key -N '' -t rsa1
-	ssh-keygen -q -f /data/ssh/ssh_host_rsa_key -N '' -t rsa
-	ssh-keygen -q -f /data/ssh/ssh_host_dsa_key -N '' -t dsa
-	ssh-keygen -q -f /data/ssh/ssh_host_ecdsa_key -N '' -t ecdsa
-	ssh-keygen -q -f /data/ssh/ssh_host_ed25519_key -N '' -t ed25519
-	chown -R root:root /data/ssh/*
-	chmod 600 /data/ssh/*
-fi
-
-service ssh start
-
-ln -sf /data/gogs/log ./log
-ln -sf /data/gogs/data ./data
-ln -sf /data/git /home/git
-
-
-if ! test -d ~git/.ssh
-then
-  mkdir ~git/.ssh
-  chmod 700 ~git/.ssh
-fi
-
-if ! test -f ~git/.ssh/environment
-then
-  echo "GOGS_CUSTOM=/data/gogs" > ~git/.ssh/environment
-  chown git:git ~git/.ssh/environment
-  chown 600 ~git/.ssh/environment
-fi
-
-chown -R git:git /data .
-exec su git -c "./gogs web"
+# Exec S6 as process manager for gogs and dropbear ssh
+exec /usr/bin/s6-svscan /app/gogs/docker/s6/