@@ -154,6 +154,51 @@ $ docker service update --mount-rm /somewhere myservice

 myservice

 ```

+### Rolling back to the previous version of a service 

+

+Use the `--rollback` option to roll back to the previous version of the service. 

+

+This will revert the service to the configuration that was in place before the most recent `docker service update` command.

+

+The following example updates the number of replicas for the service from 4 to 5, and then rolls back to the previous configuration.

+

+```bash

+$ docker service update --replicas=5 web

+

+web

+

+$ docker service ls

+

+ID            NAME  MODE        REPLICAS  IMAGE

+80bvrzp6vxf3  web   replicated  0/5       nginx:alpine

+

+```

+Roll back the `web` service... 

+

+```bash

+$ docker service update --rollback web

+

+web

+

+$ docker service ls

+

+ID            NAME  MODE        REPLICAS  IMAGE

+80bvrzp6vxf3  web   replicated  0/4       nginx:alpine

+

+```

+

+Other options can be combined with `--rollback` as well, for example, `--update-delay 0s` to execute the rollback without a delay between tasks:

+

+```bash

+$ docker service update \

+  --rollback \

+  --update-delay 0s

+  web

+

+web

+

+```

+

 ### Add or remove secrets

 Use the `--secret-add` or `--secret-rm` options add or remove a service's