7.7 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 string Service command args
--constraint-add stringSlice Add or update a placement constraint
--constraint-rm list Remove a constraint (default [])
--container-label-add list Add or update a container label (default [])
--container-label-rm list Remove a container label by its key (default [])
--dns-add list Add or update custom DNS servers (default [])
--dns-options-add list Add or update DNS options (default [])
--dns-options-rm list Remove DNS options (default [])
--dns-rm list Remove custom DNS servers (default [])
--dns-search-add list Add or update custom DNS search domains (default [])
--dns-search-rm list Remove DNS search domains (default [])
--endpoint-mode string Endpoint mode (vip or dnsrr)
--env-add list Add or update an environment variable (default [])
--env-rm list Remove an environment variable (default [])
--force Force update even if no changes require it
--group-add stringSlice Add an additional supplementary user group to the container
--group-rm list Remove a previously added supplementary user group from the container (default [])
--health-cmd string Command to run to check health
--health-interval duration-ptr Time between running the check (default none)
--health-retries int Consecutive failures needed to report unhealthy
--health-timeout duration-ptr Maximum time to allow one check to run (default none)
--help Print usage
--image string Service image tag
--label-add list Add or update a service label (default [])
--label-rm list Remove a label by its key (default [])
--limit-cpu NanoCPUs Limit CPUs (default 0.000)
--limit-memory MemoryBytes Limit Memory (default 0 B)
--log-driver string Logging driver for service
--log-opt list Logging driver options (default [])
--mount-add mount Add or update a mount on a service
--mount-rm list Remove a mount by its target path (default [])
--no-healthcheck Disable any container-specified HEALTHCHECK
--publish-add list Add or update a published port (default [])
--publish-rm list Remove a published port by its target port (default [])
--replicas uint64-ptr Number of tasks (default none)
--reserve-cpu NanoCPUs Reserve CPUs (default 0.000)
--reserve-memory MemoryBytes Reserve Memory (default 0 B)
--restart-condition string Restart when condition is met (none, on-failure, or any)
--restart-delay duration-ptr Delay between restart attempts (default none)
--restart-max-attempts uint64-ptr Maximum number of restarts before giving up (default none)
--restart-window duration-ptr Window used to evaluate the restart policy (default none)
--rollback Rollback to previous specification
--stop-grace-period duration-ptr Time to wait before force killing a container (default none)
-t, --tty Allocate a pseudo-TTY
--update-delay duration Delay between updates
--update-failure-action string Action on update failure (pause|continue) (default "pause")
--update-max-failure-ratio float32 Failure rate to tolerate during an update
--update-monitor duration Duration after each task update to monitor for failure
--update-parallelism uint Maximum number of tasks updated simultaneously (0 to update all at once) (default 1)
-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
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.
Adding and removing 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