--- title: "service update" description: "The service update command description and usage" keywords: "service, update" --- # service update ```Markdown Usage: docker service update [OPTIONS] SERVICE Update a service Options: --args command Service command args --config-add config Add or update a config file on a service --config-rm list Remove a configuration file --constraint-add list Add or update a placement constraint --constraint-rm list Remove a constraint --container-label-add list Add or update a container label --container-label-rm list Remove a container label by its key --credential-spec credential-spec Credential spec for managed service account (Windows only) -d, --detach Exit immediately instead of waiting for the service to converge (default true) --dns-add list Add or update a custom DNS server --dns-option-add list Add or update a DNS option --dns-option-rm list Remove a DNS option --dns-rm list Remove a custom DNS server --dns-search-add list Add or update a custom DNS search domain --dns-search-rm list Remove a DNS search domain --endpoint-mode string Endpoint mode (vip or dnsrr) --entrypoint command Overwrite the default ENTRYPOINT of the image --env-add list Add or update an environment variable --env-rm list Remove an environment variable --force Force update even if no changes require it --group-add list Add an additional supplementary user group to the container --group-rm list Remove a previously added supplementary user group from the container --health-cmd string Command to run to check health --health-interval duration Time between running the check (ms|s|m|h) --health-retries int Consecutive failures needed to report unhealthy --health-start-period duration Start period for the container to initialize before counting retries towards unstable (ms|s|m|h) --health-timeout duration Maximum time to allow one check to run (ms|s|m|h) --help Print usage --host-add list Add a custom host-to-IP mapping (host:ip) --host-rm list Remove a custom host-to-IP mapping (host:ip) --hostname string Container hostname --image string Service image tag --label-add list Add or update a service label --label-rm list Remove a label by its key --limit-cpu decimal Limit CPUs --limit-memory bytes Limit Memory --log-driver string Logging driver for service --log-opt list Logging driver options --mount-add mount Add or update a mount on a service --mount-rm list Remove a mount by its target path --network-add network Add a network --network-rm list Remove a network --no-healthcheck Disable any container-specified HEALTHCHECK --no-resolve-image Do not query the registry to resolve image digest and supported platforms --placement-pref-add pref Add a placement preference --placement-pref-rm pref Remove a placement preference --publish-add port Add or update a published port --publish-rm port Remove a published port by its target port -q, --quiet Suppress progress output --read-only Mount the container's root filesystem as read only --replicas uint Number of tasks --reserve-cpu decimal Reserve CPUs --reserve-memory bytes Reserve Memory --restart-condition string Restart when condition is met ("none"|"on-failure"|"any") --restart-delay duration Delay between restart attempts (ns|us|ms|s|m|h) --restart-max-attempts uint Maximum number of restarts before giving up --restart-window duration Window used to evaluate the restart policy (ns|us|ms|s|m|h) --rollback Rollback to previous specification --rollback-delay duration Delay between task rollbacks (ns|us|ms|s|m|h) --rollback-failure-action string Action on rollback failure ("pause"|"continue") --rollback-max-failure-ratio float Failure rate to tolerate during a rollback --rollback-monitor duration Duration after each task rollback to monitor for failure (ns|us|ms|s|m|h) --rollback-order string Rollback order ("start-first"|"stop-first") --rollback-parallelism uint Maximum number of tasks rolled back simultaneously (0 to roll back all at once) --secret-add secret Add or update a secret on a service --secret-rm list Remove a secret --stop-grace-period duration Time to wait before force killing a container (ns|us|ms|s|m|h) --stop-signal string Signal to stop the container -t, --tty Allocate a pseudo-TTY --update-delay duration Delay between updates (ns|us|ms|s|m|h) --update-failure-action string Action on update failure ("pause"|"continue"|"rollback") --update-max-failure-ratio float Failure rate to tolerate during an update --update-monitor duration Duration after each task update to monitor for failure (ns|us|ms|s|m|h) --update-order string Update order ("start-first"|"stop-first") --update-parallelism uint Maximum number of tasks updated simultaneously (0 to update all at once) -u, --user string Username or UID (format: [:]) --with-registry-auth Send registry authentication details to swarm agents -w, --workdir string Working directory inside the container ``` ## Description Updates a service as described by the specified parameters. This command has to be run targeting a manager node. The parameters are the same as [`docker service create`](service_create.md). Please look at the description there for further information. Normally, updating a service will only cause the service's tasks to be replaced with new ones if a change to the service requires recreating the tasks for it to take effect. For example, only changing the `--update-parallelism` setting will not recreate the tasks, because the individual tasks are not affected by this setting. However, the `--force` flag will cause the tasks to be recreated anyway. This can be used to perform a rolling restart without any changes to the service parameters. ## Examples ### Update a service ```bash $ docker service update --limit-cpu 2 redis ``` ### Perform a rolling restart with no parameter changes ```bash $ docker service update --force --update-parallelism 1 --update-delay 30s redis ``` In this example, the `--force` flag causes the service's tasks to be shut down and replaced with new ones even though none of the other parameters would normally cause that to happen. The `--update-parallelism 1` setting ensures that only one task is replaced at a time (this is the default behavior). The `--update-delay 30s` setting introduces a 30 second delay between tasks, so that the rolling restart happens gradually. ### Add or remove mounts Use the `--mount-add` or `--mount-rm` options add or remove a service's bind mounts or volumes. The following example creates a service which mounts the `test-data` volume to `/somewhere`. The next step updates the service to also mount the `other-volume` volume to `/somewhere-else`volume, The last step unmounts the `/somewhere` mount point, effectively removing the `test-data` volume. Each command returns the service name. - The `--mount-add` flag takes the same parameters as the `--mount` flag on `service create`. Refer to the [volumes and bind mounts](service_create.md#volumes-and-bind-mounts-mount) section in the `service create` reference for details. - The `--mount-rm` flag takes the `target` path of the mount. ```bash $ docker service create \ --name=myservice \ --mount \ type=volume,source=test-data,target=/somewhere \ nginx:alpine \ myservice myservice $ docker service update \ --mount-add \ type=volume,source=other-volume,target=/somewhere-else \ myservice myservice $ docker service update --mount-rm /somewhere myservice myservice ``` ### Roll 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 ``` Services can also be set up to roll back to the previous version automatically when an update fails. To set up a service for automatic rollback, use `--update-failure-action=rollback`. A rollback will be triggered if the fraction of the tasks which failed to update successfully exceeds the value given with `--update-max-failure-ratio`. The rate, parallelism, and other parameters of a rollback operation are determined by the values passed with the following flags: - `--rollback-delay` - `--rollback-failure-action` - `--rollback-max-failure-ratio` - `--rollback-monitor` - `--rollback-parallelism` For example, a service set up with `--update-parallelism 1 --rollback-parallelism 3` will update one task at a time during a normal update, but during a rollback, 3 tasks at a time will get rolled back. These rollback parameters are respected both during automatic rollbacks and for rollbacks initiated manually using `--rollback`. ### Add or remove secrets Use the `--secret-add` or `--secret-rm` options add or remove a service's secrets. The following example adds a secret named `ssh-2` and removes `ssh-1`: ```bash $ docker service update \ --secret-add source=ssh-2,target=ssh-2 \ --secret-rm ssh-1 \ myservice ``` ### Update services using templates Some flags of `service update` support the use of templating. See [`service create`](./service_create.md#templating) for the reference. ## Related commands * [service create](service_create.md) * [service inspect](service_inspect.md) * [service logs](service_logs.md) * [service ls](service_ls.md) * [service ps](service_ps.md) * [service rm](service_rm.md) * [service rollback](service_rollback.md) * [service scale](service_scale.md)