12 KiB
| title | description | keywords |
|---|---|---|
| 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
--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
-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 or update 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 list Add a network
--network-rm list Remove a network
--no-healthcheck Disable any container-specified HEALTHCHECK
--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") (default "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. 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
$ 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-addflag takes the same parameters as the--mountflag onservice create. Refer to the volumes and bind-mounts section in theservice createreference for details. -
The
--mount-rmflag takes thetargetpath of the mount.
$ 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
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.
$ 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.