使用容器名称而不是容器 ID 保存 docker 个容器日志

Saving docker container logs with container names instead of container IDs

使用默认的 json-file 日志记录驱动程序,是否可以使用容器名称而不是容器 ID 来记录轮换 docker 容器日志?

日志文件名中的容器 ID 看起来不太可读,这是我想用容器名称保存日志的时候吗?

可以使用日志选项配置引擎以在日志中包含标签:

# cat /etc/docker/daemon.json 
{
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "10m",
    "max-file": "3",
    "labels": "com.docker.stack.namespace,com.docker.swarm.service.name,environment"
  }
}

# docker run --label environment=dev busybox echo hello logs
hello logs
root@vm-11:/etc/docker# docker ps -l
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS                     PORTS               NAMES
9615c898c2d2        busybox             "echo hello logs"   8 seconds ago       Exited (0) 7 seconds ago                       eloquent_germain

# docker logs --details 961
environment=dev hello logs

# more /var/lib/docker/containers/9615c898c2d2aa7439581e08c2e685f154e4bf2bb9fd5ded0c384da3242c6c9e/9615c898c2d2aa7439581e08c2e685f154e4bf2bb9fd5ded0c384da3242c6c9e-json.log
{"log":"hello logs\n","stream":"stdout","attrs":{"environment":"dev"},"time":"2020-09-22T11:12:41.279155826Z"}

您需要在对 daemon.json 进行更改后重新加载 docker 引擎,并且更改仅适用于新创建的容器。对于 systemd,重新加载是通过 systemctl reload docker.

完成的

要专门传递不是标签的容器名称,您可以传递“标记”设置:

# docker run --name test-log-opts --log-opt tag="{{.Name}}/{{.ID}}" busybox echo hello log opts
hello log opts

# docker ps -l
CONTAINER ID        IMAGE               COMMAND                 CREATED             STATUS                     PORTS               NAMES
c201d0a2504a        busybox             "echo hello log opts"   6 seconds ago       Exited (0) 5 seconds ago                       test-log-opts

# docker logs --details c20
tag=test-log-opts%2Fc201d0a2504a hello log opts

# more /var/lib/docker/containers/c201d0a2504addedb2b6785850a83e8931052d0d9778438e9dcc27391f45fec2/c201d0a2504addedb2b6785850a83e8931052d0d9778438e9dcc27391f45fec2-json.log
{"log":"hello log opts\n","stream":"stdout","attrs":{"tag":"test-log-opts/c201d0a2504a"},"time":"2020-09-22T11:15:26.998956544Z"}

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