service ps

Usage:  docker service ps [OPTIONS] SERVICE

List the tasks of one or more services

Options:
  -f, --filter filter   Filter output based on conditions provided
      --help            Print usage
      --no-resolve      Do not map IDs to Names
      --no-trunc        Do not truncate output
  -q, --quiet           Only display task IDs

Lists the tasks that are running as part of the specified services. This command has to be run targeting a manager node.

Examples

Listing the tasks that are part of a service

The following command shows all the tasks that are part of the redis service:

$ docker service ps redis

ID             NAME      IMAGE        NODE      DESIRED STATE  CURRENT STATE          ERROR  PORTS
0qihejybwf1x   redis.1   redis:3.0.5  manager1  Running        Running 8 seconds
bk658fpbex0d   redis.2   redis:3.0.5  worker2   Running        Running 9 seconds
5ls5s5fldaqg   redis.3   redis:3.0.5  worker1   Running        Running 9 seconds
8ryt076polmc   redis.4   redis:3.0.5  worker1   Running        Running 9 seconds
1x0v8yomsncd   redis.5   redis:3.0.5  manager1  Running        Running 8 seconds
71v7je3el7rr   redis.6   redis:3.0.5  worker2   Running        Running 9 seconds
4l3zm9b7tfr7   redis.7   redis:3.0.5  worker2   Running        Running 9 seconds
9tfpyixiy2i7   redis.8   redis:3.0.5  worker1   Running        Running 9 seconds
3w1wu13yupln   redis.9   redis:3.0.5  manager1  Running        Running 8 seconds
8eaxrb2fqpbn   redis.10  redis:3.0.5  manager1  Running        Running 8 seconds

In addition to running tasks, the output also shows the task history. For example, after updating the service to use the redis:3.0.6 image, the output may look like this:

$ docker service ps redis

ID            NAME         IMAGE        NODE      DESIRED STATE  CURRENT STATE                   ERROR  PORTS
50qe8lfnxaxk  redis.1      redis:3.0.6  manager1  Running        Running 6 seconds ago
ky2re9oz86r9   \_ redis.1  redis:3.0.5  manager1  Shutdown       Shutdown 8 seconds ago
3s46te2nzl4i  redis.2      redis:3.0.6  worker2   Running        Running less than a second ago
nvjljf7rmor4   \_ redis.2  redis:3.0.6  worker2   Shutdown       Rejected 23 seconds ago        "No such image: redis@sha256:6…"
vtiuz2fpc0yb   \_ redis.2  redis:3.0.5  worker2   Shutdown       Shutdown 1 second ago
jnarweeha8x4  redis.3      redis:3.0.6  worker1   Running        Running 3 seconds ago
vs448yca2nz4   \_ redis.3  redis:3.0.5  worker1   Shutdown       Shutdown 4 seconds ago
jf1i992619ir  redis.4      redis:3.0.6  worker1   Running        Running 10 seconds ago
blkttv7zs8ee   \_ redis.4  redis:3.0.5  worker1   Shutdown       Shutdown 11 seconds ago

The number of items in the task history is determined by the --task-history-limit option that was set when initializing the swarm. You can change the task history retention limit using the docker swarm update command.

When deploying a service, docker resolves the digest for the service's image, and pins the service to that digest. The digest is not shown by default, but is printed if --no-trunc is used. The --no-trunc option also shows the non-truncated task ID, and error-messages, as can be seen below;

$ docker service ps --no-trunc redis

ID                          NAME         IMAGE                                                                                NODE      DESIRED STATE  CURRENT STATE            ERROR                                                                                           PORTS
50qe8lfnxaxksi9w2a704wkp7   redis.1      redis:3.0.6@sha256:6a692a76c2081888b589e26e6ec835743119fe453d67ecf03df7de5b73d69842  manager1  Running        Running 5 minutes ago
ky2re9oz86r9556i2szb8a8af   \_ redis.1   redis:3.0.5@sha256:f8829e00d95672c48c60f468329d6693c4bdd28d1f057e755f8ba8b40008682e  worker2   Shutdown       Shutdown 5 minutes ago
bk658fpbex0d57cqcwoe3jthu   redis.2      redis:3.0.6@sha256:6a692a76c2081888b589e26e6ec835743119fe453d67ecf03df7de5b73d69842  worker2   Running        Running 5 seconds
nvjljf7rmor4htv7l8rwcx7i7   \_ redis.2   redis:3.0.6@sha256:6a692a76c2081888b589e26e6ec835743119fe453d67ecf03df7de5b73d69842  worker2   Shutdown       Rejected 5 minutes ago   "No such image: redis@sha256:6a692a76c2081888b589e26e6ec835743119fe453d67ecf03df7de5b73d69842"

Filtering

The filtering flag (-f or --filter) format is a key=value pair. If there is more than one filter, then pass multiple flags (e.g. --filter "foo=bar" --filter "bif=baz"). Multiple filter flags are combined as an OR filter. For example, -f name=redis.1 -f name=redis.7 returns both redis.1 and redis.7 tasks.

The currently supported filters are:

id
name
node
desired-state

ID

The id filter matches on all or a prefix of a task's ID.

$ docker service ps -f "id=8" redis

ID             NAME      IMAGE        NODE      DESIRED STATE  CURRENT STATE      ERROR  PORTS
8ryt076polmc   redis.4   redis:3.0.6  worker1   Running        Running 9 seconds
8eaxrb2fqpbn   redis.10  redis:3.0.6  manager1  Running        Running 8 seconds

Name

The name filter matches on task names.

$ docker service ps -f "name=redis.1" redis
ID            NAME     IMAGE        NODE      DESIRED STATE  CURRENT STATE      ERROR  PORTS
qihejybwf1x5  redis.1  redis:3.0.6  manager1  Running        Running 8 seconds

Node

The node filter matches on a node name or a node ID.

$ docker service ps -f "node=manager1" redis
ID            NAME      IMAGE        NODE      DESIRED STATE  CURRENT STATE      ERROR  PORTS
0qihejybwf1x  redis.1   redis:3.0.6  manager1  Running        Running 8 seconds
1x0v8yomsncd  redis.5   redis:3.0.6  manager1  Running        Running 8 seconds
3w1wu13yupln  redis.9   redis:3.0.6  manager1  Running        Running 8 seconds
8eaxrb2fqpbn  redis.10  redis:3.0.6  manager1  Running        Running 8 seconds

desired-state

The desired-state filter can take the values running, shutdown, and accepted.

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