Issue RotherOSS#51: first stab at running Daemon and Cron in own shell

Not really tested yet.

Dockerfile

@@ -51,6 +51,7 @@ RUN perl bin/docker/set_permissions.pl
 # start the webserver
 # start the Cron watchdog
 # Tell the webapplication that it runs in a container.
-USER otobo
+# The entrypoint takes one command: 'web' or 'cron'
 ENV OTOBO_RUNS_UNDER_DOCKER 1
-ENTRYPOINT ["/opt/otobo/bin/docker/entrypoint.sh"]
+ENV OTOBO_USER otobo
+ENTRYPOINT ["bin/docker/entrypoint.sh"]

bin/docker/entrypoint.sh

@@ -1,25 +1,45 @@
 #!/usr/bin/env bash
 
-# no command line arguments are handled
+# root handles 'cron' and defers 'web' to the OTOBO user
+if [ $UID -eq 0 ]; then
+    echo "otobo_user: $OTOBO_USER";
+    if [ "$1" = "cron" ]; then
+        # Start the OTOBO Daemon.
+        # The Daemon will exit immediately when SecureMode = 0.
+        # But this is OK, as Cron will restart it and it will run when SecureMode = 1.
+        su -c "./bin/otobo.Daemon.pl start" "$OTOBO_USER"
 
-# Start up OTOBO Daemon and the webserver
-# Run a watchdog over the Daemon via Cron
+        # assume that we are in /opt/otobo
+        su -c "mkdir -p var/tmp" "$OTOBO_USER"
 
-# assume that we are in /opt/otobo
-mkdir -p var/tmp
+        # set up the cronjobs as they are declared in var/cron
+        su -c "./bin/Cron.sh start" "$OTOBO_USER"
 
-# set up the cronjobs as they are declared in var/cron
-./bin/Cron.sh start
+        # Run a watchdog over the Daemon via Cron
+        # run cron in the foreground
+        exec cron -f
+        # nothing will be executed beyond that line,
+        # because exec replaces running process with the new one
+    fi
 
-# Start the Daemon.
-# The Daemon will exit immediately when SecureMode = 0.
-# But this is OK, as Cron will restart it and it will run when SecureMode = 1.
-./bin/otobo.Daemon.pl start
+    # everything else is run as otobo
+    exec su "$OTOBO_USER" "$0" -- "$@"
+    # nothing will be executed beyond that line,
+    # because exec replaces running process with the new one
+fi
 
-# maintainance jobs
-# TODO: decide whether it makes sense to run these jobs on startup
-#perl ./bin/otobo.Console.pl Maint::Config::Rebuild
-#perl ./bin/otobo.Console.pl Maint::Cache::Delete
+echo "The command $1 will be run from user $UID."
 
-# Start the webserver
-plackup --server Gazelle -R Kernel,bin/psgi-bin/otobo.psgi --port 5000 bin/psgi-bin/otobo.psgi
+if [ "$1" = "web" ]; then
+    # maintainance jobs
+    # TODO: decide whether it makes sense to run these jobs on startup
+    #perl ./bin/otobo.Console.pl Maint::Config::Rebuild
+    #perl ./bin/otobo.Console.pl Maint::Cache::Delete
+
+    # Start the webserver
+    plackup --server Gazelle -R Kernel,bin/psgi-bin/otobo.psgi --port 5000 bin/psgi-bin/otobo.psgi
+
+else
+    echo "Unknown option $1. Exiting."
+    exit -1
+fi

docker-compose.yml

@@ -33,6 +33,8 @@ services:
     # use ./Dockerfile for building, image otobo-web
     build:
       context: .
+    # give a name to the build image so that the service 'cron' can reuse it
+    image: otobo_web:latest
     depends_on:
       - db
     restart: always
@@ -41,6 +43,13 @@ services:
       - "5000:5000"
     volumes:
       - opt_otobo:/opt/otobo
+    command: web
+
+  cron:
+    image: otobo_web:latest
+    volumes:
+      - opt_otobo:/opt/otobo
+    command: cron
 
 # no volumnes need to be exposed across services
 volumes: