9.8 KiB
node ls
List nodes in the swarm
Aliases
docker node ls, docker node list
Options
| Name | Type | Default | Description |
|---|---|---|---|
-f, --filter |
filter |
Filter output based on conditions provided | |
--format |
string |
Format output using a custom template: 'table': Print output in table format with column headers (default) 'table TEMPLATE': Print output in table format using the given Go template 'json': Print in JSON format 'TEMPLATE': Print output using the given Go template. Refer to https://docs.docker.com/go/formatting/ for more information about formatting output with templates |
|
-q, --quiet |
Only display IDs |
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.
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
$ 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
.Selfthat 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 (--filter)
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. Engine labels are configured in
the daemon configuration. To filter on
Swarm node labels, use node.label instead.
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
node.label
The node.label filter matches nodes based on node labels and on the presence
of a node.label alone or a node.label and a value.
The following filter updates nodes to have a region node label:
$ docker node update --label-add region=region-a swarm-test-01
$ docker node update --label-add region=region-a swarm-test-02
$ docker node update --label-add region=region-b swarm-test-03
$ docker node update --label-add region=region-b swarm-test-04
Show all nodes that have a region node label set:
$ docker node ls --filter node.label=region
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION
yg550ettvsjn6g6t840iaiwgb * swarm-test-01 Ready Active Leader 20.10.2
2lm9w9kbepgvkzkkeyku40e65 swarm-test-02 Ready Active Reachable 20.10.2
hc0pu7ntc7s4uvj4pv7z7pz15 swarm-test-03 Ready Active Reachable 20.10.2
n41b2cijmhifxxvz56vwrs12q swarm-test-04 Ready Active 20.10.2
Show all nodes that have a region node label, with value region-a:
$ docker node ls --filter node.label=region=region-a
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION
yg550ettvsjn6g6t840iaiwgb * swarm-test-01 Ready Active Leader 20.10.2
2lm9w9kbepgvkzkkeyku40e65 swarm-test-02 Ready Active Reachable 20.10.2
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
Format the output (--format)
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, trueindicates 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
To list all nodes in JSON format, use the json directive:
$ docker node ls --format json
{"Availability":"Active","EngineVersion":"20.10.5","Hostname":"docker-desktop","ID":"k8f4w7qtzpj5sqzclcqafw35g","ManagerStatus":"Leader","Self":true,"Status":"Ready","TLSStatus":"Ready"}