Merge pull request #4056 from iancoffey/dbbackup

feat(database): backup the db on unit stop

Author: iancoffey

deisctl/units/deis-database.service

@@ -8,6 +8,7 @@ ExecStartPre=/bin/sh -c "docker inspect deis-database-data >/dev/null 2>&1 || do
 ExecStartPre=/bin/sh -c "IMAGE=`/run/deis/bin/get_image /deis/database` && docker history $IMAGE >/dev/null 2>&1 || docker pull $IMAGE"
 ExecStartPre=/bin/sh -c "docker inspect deis-database >/dev/null 2>&1 && docker rm -f deis-database >/dev/null 2>&1 || true"
 ExecStart=/bin/sh -c "IMAGE=`/run/deis/bin/get_image /deis/database` && docker run --name deis-database --rm --volumes-from=deis-database-data -p 5432:5432 -e EXTERNAL_PORT=5432 -e HOST=$COREOS_PRIVATE_IPV4 $IMAGE"
+ExecStopPost=-/usr/bin/docker exec deis-database sudo -u postgres envdir /etc/wal-e.d/env wal-e backup-push /var/lib/postgresql/9.3/main
 ExecStopPost=-/usr/bin/docker exec deis-database sudo service postgresql stop
 Restart=on-failure
 RestartSec=5