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service update	The service update command description and usage	service, update

service update

Usage:  docker service update [OPTIONS] SERVICE

Update a service

Options:
      --args command                       Service command args
      --cap-add list                       Add Linux capabilities
      --cap-drop list                      Drop Linux capabilities
      --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
      --generic-resource-add list          Add an additional generic resource to the service's resources requirements
      --generic-resource-rm list           Remove a previously added generic resource to the service's resources requirements
      --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
      --init bool                          Use an init inside each service container to forward signals and reap processes
      --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
      --limit-pids int                     Limit maximum number of processes (default 0 = unlimited)
      --log-driver string                  Logging driver for service
      --log-opt list                       Logging driver options
      --max-concurrent                     Number of job tasks to run at once (default equal to --replicas)
      --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
      --sysctl-add list                    Add or update a Sysctl option
      --sysctl-rm list                     Remove a Sysctl option
  -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. The parameters are the same as docker service create. Refer to 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.

Note

This is a cluster management command, and must be executed on a swarm manager node. To learn about managers and workers, refer to the Swarm mode section in the documentation.

Examples

Update a service

$ docker service update --limit-cpu 2 redis

Perform a rolling restart with no parameter changes

$ 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-elsevolume, 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 section in the service create reference for details.
The --mount-rm flag takes the target path of the mount.

$ docker service create \
    --name=myservice \
    --mount type=volume,source=test-data,target=/somewhere \
    nginx:alpine

myservice

$ docker service update \
    --mount-add type=volume,source=other-volume,target=/somewhere-else \
    myservice

myservice

$ docker service update --mount-rm /somewhere myservice

myservice

Add or remove published service ports

Use the --publish-add or --publish-rm flags to add or remove a published port for a service. You can use the short or long syntax discussed in the docker service create reference.

The following example adds a published service port to an existing service.

$ docker service update \
  --publish-add published=8080,target=80 \
  myservice

Add or remove network

Use the --network-add or --network-rm flags to add or remove a network for a service. You can use the short or long syntax discussed in the docker service create reference.

The following example adds a new alias name to an existing service already connected to network my-network:

$ docker service update \
  --network-rm my-network \
  --network-add name=my-network,alias=web1 \
  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.

$ 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...

$ 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:

$ 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:

$ 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 for the reference.

Specify isolation mode (Windows)

service update supports the same --isolation flag as service create See service create for the reference.

Updating Jobs

When a service is created as a job, by setting its mode to replicated-job or to global-job when doing service create, options for updating it are limited.

Updating a Job immediately stops any Tasks that are in progress. The operation creates a new set of Tasks for the job and effectively resets its completion status. If any Tasks were running before the update, they are stopped, and new Tasks are created.

Jobs cannot be rolled out or rolled back. None of the flags for configuring update or rollback settings are valid with job modes.

To run a job again with the same parameters that it was run previously, it can be force updated with the --force flag.

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