fix(systemd): handle starting containers that already exist

After a reboot, named containers for Deis components often
exist in a stopped state.  Prior to this commit,
Deis would fail to start the components due to a name conflict.
Now any existing named containers are removed in ExecStartPre
so ExecStart should always succeed.

Author: Gabriel Monroy

builder/systemd/deis-builder.service

@@ -7,7 +7,8 @@ After=deis-controller.service
 EnvironmentFile=/etc/environment
 TimeoutStartSec=20m
 ExecStartPre=/bin/sh -c "/usr/bin/docker history deis/builder >/dev/null || /usr/bin/docker pull deis/builder"
-ExecStartPre=/bin/bash -c "/usr/bin/docker start deis-builder-data || /usr/bin/docker run --name deis-builder-data -v /var/lib/docker deis/base /bin/true"
+ExecStartPre=/bin/sh -c "/usr/bin/docker inspect deis-builder >/dev/null && /usr/bin/docker rm -f deis-builder || true"
+ExecStartPre=/bin/sh -c "/usr/bin/docker start deis-builder-data || /usr/bin/docker run --name deis-builder-data -v /var/lib/docker deis/base /bin/true"
 ExecStart=/bin/sh -c "docker run --name deis-builder -p 2222:22 -e PUBLISH=22 -e HOST=$COREOS_PRIVATE_IPV4 -e PORT=2222 --volumes-from deis-builder-data --privileged deis/builder"
 ExecStartPost=/bin/sh -c "echo 'Waiting for builder on 2222/tcp...' && until cat </dev/null>/dev/tcp/$COREOS_PRIVATE_IPV4/2222; do sleep 1; done"
 ExecStop=/usr/bin/docker rm -f deis-builder

cache/systemd/deis-cache.service

@@ -4,7 +4,8 @@ Description=deis-cache
 [Service]
 EnvironmentFile=/etc/environment
 TimeoutStartSec=20m
-ExecStartPre=/bin/sh -c "/usr/bin/docker history deis/cache || /usr/bin/docker pull deis/cache"
+ExecStartPre=/bin/sh -c "/usr/bin/docker history deis/cache >/dev/null || /usr/bin/docker pull deis/cache"
+ExecStartPre=/bin/sh -c "/usr/bin/docker inspect deis-cache >/dev/null && /usr/bin/docker rm -f deis-cache || true"
 ExecStart=/bin/sh -c "docker run --name deis-cache -p 6379:6379 -e PUBLISH=6379 -e HOST=$COREOS_PRIVATE_IPV4 deis/cache"
 ExecStop=/usr/bin/docker rm -f deis-cache
 

controller/systemd/deis-controller.service

@@ -7,6 +7,7 @@ After=deis-logger.service
 EnvironmentFile=/etc/environment
 TimeoutStartSec=20m
 ExecStartPre=/bin/sh -c "/usr/bin/docker history deis/controller >/dev/null || /usr/bin/docker pull deis/controller"
+ExecStartPre=/bin/sh -c "/usr/bin/docker inspect deis-controller >/dev/null && /usr/bin/docker rm -f deis-controller || true"
 ExecStart=/bin/sh -c "docker run --name deis-controller -p 8000:8000 -e PUBLISH=8000 -e HOST=$COREOS_PRIVATE_IPV4 --volumes-from=deis-logger deis/controller"
 ExecStop=/usr/bin/docker rm -f deis-controller
 

database/systemd/deis-database.service

@@ -5,7 +5,8 @@ Description=deis-database
 EnvironmentFile=/etc/environment
 TimeoutStartSec=20m
 ExecStartPre=/bin/sh -c "/usr/bin/docker history deis/database >/dev/null || /usr/bin/docker pull deis/database"
-ExecStartPre=/bin/bash -c "/usr/bin/docker start deis-database-data || /usr/bin/docker run --name deis-database-data -v /var/lib/postgresql deis/base /bin/true"
+ExecStartPre=/bin/sh -c "/usr/bin/docker inspect deis-database >/dev/null && /usr/bin/docker rm -f deis-database || true"
+ExecStartPre=/bin/sh -c "/usr/bin/docker start deis-database-data || /usr/bin/docker run --name deis-database-data -v /var/lib/postgresql deis/base /bin/true"
 ExecStart=/bin/sh -c "docker run --name deis-database -p 5432:5432 -e PUBLISH=5432 -e HOST=$COREOS_PRIVATE_IPV4 --volumes-from deis-database-data deis/database
 ExecStop=/usr/bin/docker rm -f deis-database
 

logger/systemd/deis-logger.service

@@ -5,7 +5,8 @@ Description=deis-logger
 EnvironmentFile=/etc/environment
 TimeoutStartSec=20m
 ExecStartPre=/bin/sh -c "/usr/bin/docker history deis/logger >/dev/null || /usr/bin/docker pull deis/logger"
-ExecStartPre=/bin/bash -c "/usr/bin/docker start deis-logger-data || /usr/bin/docker run --name deis-logger-data -v /var/log/deis deis/base /bin/true"
+ExecStartPre=/bin/sh -c "/usr/bin/docker inspect deis-logger >/dev/null && /usr/bin/docker rm -f deis-logger || true"
+ExecStartPre=/bin/sh -c "/usr/bin/docker start deis-logger-data || /usr/bin/docker run --name deis-logger-data -v /var/log/deis deis/base /bin/true"
 ExecStart=/bin/sh -c "docker run --name deis-logger -p 514:514/udp -e PUBLISH=514 -e HOST=$COREOS_PRIVATE_IPV4 --volumes-from deis-logger-data deis/logger"
 ExecStop=/usr/bin/docker rm -f deis-logger
 

registry/systemd/deis-registry.service

@@ -5,7 +5,8 @@ Description=deis-registry
 EnvironmentFile=/etc/environment
 TimeoutStartSec=20m
 ExecStartPre=/bin/sh -c "/usr/bin/docker history deis/registry >/dev/null || /usr/bin/docker pull deis/registry"
-ExecStartPre=/bin/bash -c "/usr/bin/docker start deis-registry-data || /usr/bin/docker run --name deis-registry-data -v /data deis/base /bin/true"
+ExecStartPre=/bin/sh -c "/usr/bin/docker inspect deis-registry >/dev/null && /usr/bin/docker rm -f deis-registry || true"
+ExecStartPre=/bin/sh -c "/usr/bin/docker start deis-registry-data || /usr/bin/docker run --name deis-registry-data -v /data deis/base /bin/true"
 ExecStart=/bin/sh -c "docker run --name deis-registry -p 5000:5000 -e PUBLISH=5000 -e HOST=$COREOS_PRIVATE_IPV4 --volumes-from deis-registry-data deis/registry"
 ExecStartPost=/bin/sh -c "echo 'Waiting for listener on 5000/tcp...' && until cat </dev/null>/dev/tcp/$COREOS_PRIVATE_IPV4/5000; do sleep 1; done && docker pull deis/slugrunner:latest && docker tag deis/slugrunner $COREOS_PRIVATE_IPV4:5000/deis/slugrunner && docker push $COREOS_PRIVATE_IPV4:5000/deis/slugrunner"
 ExecStop=/usr/bin/docker rm -f deis-registry

router/systemd/deis-router.service

@@ -5,6 +5,7 @@ Description=deis-router
 EnvironmentFile=/etc/environment
 TimeoutStartSec=20m
 ExecStartPre=/bin/sh -c "/usr/bin/docker history deis/router >/dev/null || /usr/bin/docker pull deis/router"
+ExecStartPre=/bin/sh -c "/usr/bin/docker inspect deis-router >/dev/null && /usr/bin/docker rm -f deis-router || true"
 ExecStart=/bin/sh -c "docker run --name deis-router -p 80:80 -e PUBLISH=80 -e HOST=$COREOS_PRIVATE_IPV4 deis/router"
 ExecStop=/usr/bin/docker rm -f deis-router