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docker-cli-openbsd/docs/reference/commandline/service_update.md

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---
title: "service update"
description: "The service update command description and usage"
keywords: "service, update"
---
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# 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
--isolation string Service container isolation mode
--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: <name|uid>[:<group|gid>])
--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.
### Specify isolation mode (Windows)
`service update` supports the same `--isolation` flag as `service create`
See [`service create`](./service_create.md) 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)
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