docker node ls
Estimated reading time: 5 minutesDescription
List nodes in the swarm
API 1.24+
The client and daemon API must both be at least
1.24
to use this command. Use the docker version
command on the client to check
your client and daemon API versions.
Swarm This command works with the Swarm orchestrator.
Usage
docker node ls [OPTIONS]
Options
Name, shorthand | Default | Description |
--filter , -f |
Filter output based on conditions provided | |
--format |
Pretty-print nodes using a Go template | |
--quiet , -q |
Only display IDs |
Parent command
Command | Description |
---|---|
docker node | Manage Swarm nodes |
Related commands
Command | Description |
docker node demote | Demote one or more nodes from manager in the swarm |
docker node inspect | Display detailed information on one or more nodes |
docker node ls | List nodes in the swarm |
docker node promote | Promote one or more nodes to manager in the swarm |
docker node ps | List tasks running on one or more nodes, defaults to current node |
docker node rm | Remove one or more nodes from the swarm |
docker node update | Update a node |
Extended description
Lists all the nodes that the Docker Swarm manager knows about. You can filter
using the -f
or --filter
flag. Refer to the filtering section
for more information about available filter options.
Examples
$ docker node ls
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS
1bcef6utixb0l0ca7gxuivsj0 swarm-worker2 Ready Active
38ciaotwjuritcdtn9npbnkuz swarm-worker1 Ready Active
e216jshn25ckzbvmwlnh5jr3g * swarm-manager1 Ready Active Leader
Note: In the above example output, there is a hidden column of
.Self
that indicates if the node is the same node as the current docker daemon. A*
(e.g.,e216jshn25ckzbvmwlnh5jr3g *
) means this node is the current docker daemon.
Filtering
The filtering flag (-f
or --filter
) format is of “key=value”. If there is more
than one filter, then pass multiple flags (e.g., --filter "foo=bar" --filter "bif=baz"
)
The currently supported filters are:
id
The id
filter matches all or part of a node’s id.
$ docker node ls -f id=1
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS
1bcef6utixb0l0ca7gxuivsj0 swarm-worker2 Ready Active
label
The label
filter matches nodes based on engine labels and on the presence of a label
alone or a label
and a value. Node labels are currently not used for filtering.
The following filter matches nodes with the foo
label regardless of its value.
$ docker node ls -f "label=foo"
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS
1bcef6utixb0l0ca7gxuivsj0 swarm-worker2 Ready Active
membership
The membership
filter matches nodes based on the presence of a membership
and a value
accepted
or pending
.
The following filter matches nodes with the membership
of accepted
.
$ docker node ls -f "membership=accepted"
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS
1bcef6utixb0l0ca7gxuivsj0 swarm-worker2 Ready Active
38ciaotwjuritcdtn9npbnkuz swarm-worker1 Ready Active
name
The name
filter matches on all or part of a node hostname.
The following filter matches the nodes with a name equal to swarm-master
string.
$ docker node ls -f name=swarm-manager1
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS
e216jshn25ckzbvmwlnh5jr3g * swarm-manager1 Ready Active Leader
role
The role
filter matches nodes based on the presence of a role
and a value worker
or manager
.
The following filter matches nodes with the manager
role.
$ docker node ls -f "role=manager"
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS
e216jshn25ckzbvmwlnh5jr3g * swarm-manager1 Ready Active Leader
Formatting
The formatting options (--format
) pretty-prints nodes output
using a Go template.
Valid placeholders for the Go template are listed below:
Placeholder | Description |
---|---|
.ID |
Node ID |
.Self |
Node of the daemon (true/false , true indicates that the node is the same as current docker daemon) |
.Hostname |
Node hostname |
.Status |
Node status |
.Availability |
Node availability (“active”, “pause”, or “drain”) |
.ManagerStatus |
Manager status of the node |
.TLSStatus |
TLS status of the node (“Ready”, or “Needs Rotation” has TLS certificate signed by an old CA) |
.EngineVersion |
Engine version |
When using the --format
option, the node ls
command will either
output the data exactly as the template declares or, when using the
table
directive, includes column headers as well.
The following example uses a template without headers and outputs the
ID
, Hostname
, and TLS Status
entries separated by a colon for all nodes:
$ docker node ls --format "{{.ID}}: {{.Hostname}} {{.TLSStatus}}"
e216jshn25ckzbvmwlnh5jr3g: swarm-manager1 Ready
35o6tiywb700jesrt3dmllaza: swarm-worker1 Needs Rotation