docker service inspect
内容説明 | Display detailed information on one or more services |
---|---|
利用方法 | docker service inspect [OPTIONS] SERVICE [SERVICE...] |
Swarm このコマンドは Swarm オーケストレーターにおいて動作します。
内容説明
Inspects the specified service.
By default, this renders all results in a JSON array. If a format is specified, the given template will be executed for each result.
Go's text/template package describes all the details of the format.
メモ
これはクラスター管理コマンドであるため、Swarm のマネージャーノード上で実行する必要があります。 マネージャーノードとワーカーノードについては、本ドキュメントの Swarm モード を参照してください。
オプション
オプション | デフォルト | 内容説明 |
---|---|---|
-f, --format | Format output using a custom 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 | |
--pretty | Print the information in a human friendly format |
利用例
Inspect a service by name or ID
You can inspect a service, either by its name, or ID
For example, given the following service;
$ docker service ls
ID NAME MODE REPLICAS IMAGE
dmu1ept4cxcf redis replicated 3/3 redis:7.4.1
Both docker service inspect redis
, and docker service inspect dmu1ept4cxcf
produce the same result:
$ docker service inspect redis
The output is in JSON format, for example:
[
{
"ID": "dmu1ept4cxcfe8k8lhtux3ro3",
"Version": {
"Index": 12
},
"CreatedAt": "2016-06-17T18:44:02.558012087Z",
"UpdatedAt": "2016-06-17T18:44:02.558012087Z",
"Spec": {
"Name": "redis",
"TaskTemplate": {
"ContainerSpec": {
"Image": "redis:7.4.1"
},
"Resources": {
"Limits": {},
"Reservations": {}
},
"RestartPolicy": {
"Condition": "any",
"MaxAttempts": 0
},
"Placement": {}
},
"Mode": {
"Replicated": {
"Replicas": 1
}
},
"UpdateConfig": {},
"EndpointSpec": {
"Mode": "vip"
}
},
"Endpoint": {
"Spec": {}
}
}
]
$ docker service inspect dmu1ept4cxcf
[
{
"ID": "dmu1ept4cxcfe8k8lhtux3ro3",
"Version": {
"Index": 12
},
...
}
]
Formatting (--pretty)
You can print the inspect output in a human-readable format instead of the default
JSON output, by using the --pretty
option:
$ docker service inspect --pretty frontend
ID: c8wgl7q4ndfd52ni6qftkvnnp
Name: frontend
Labels:
- org.example.projectname=demo-app
Service Mode: REPLICATED
Replicas: 5
Placement:
UpdateConfig:
Parallelism: 0
On failure: pause
Max failure ratio: 0
ContainerSpec:
Image: nginx:alpine
Resources:
Networks: net1
Endpoint Mode: vip
Ports:
PublishedPort = 4443
Protocol = tcp
TargetPort = 443
PublishMode = ingress
You can also use --format pretty
for the same effect.
Format the output (--format)
You can use the --format option to obtain specific information about a
The --format
option can be used to obtain specific information about a
service. For example, the following command outputs the number of replicas
of the "redis" service.
$ docker service inspect --format='{{.Spec.Mode.Replicated.Replicas}}' redis
10