【Docker】docker logs过大解决办法

前言

运维的一台机器，docker开了两年多，日志占用十几G了，需要清理,一般来说，docker的日志路径都是在/var/lib/docker/containers/容器id/中。

查看日志大小

查找所有1G以上的日志

[root@VM-8-8-centos docker]# find /var/lib/docker/ -name "*-json.log" -size +1024M
/var/lib/docker/containers/e8bc28c83391b5262fa385a865f8b6d03b13b6fb9756fe33052cb2b59cbf3344/e8bc28c83391b5262fa385a865f8b6d03b13b6fb9756fe33052cb2b59cbf3344-json.log
/var/lib/docker/containers/f3e2ebcd67e7603e5f1312f2092f70e3d8d652aeb06d53d39233ec4e408ca9d5/f3e2ebcd67e7603e5f1312f2092f70e3d8d652aeb06d53d39233ec4e408ca9d5-json.log

临时解决

针对日志过大的问题，可以使用cat /dev/null > 文件的方式来清理

[root@VM-8-8-centos docker]# cat /dev/null >  /var/lib/docker/containers/e8bc28c83391b5262fa385a865f8b6d03b13b6fb9756fe33052cb2b59cbf3344/e8bc28c83391b5262fa385a865f8b6d03b13b6fb9756fe33052cb2b59cbf3344-json.log
[root@VM-8-8-centos docker]# ls -lah /var/lib/docker/containers/e8bc28c83391b5262fa385a865f8b6d03b13b6fb9756fe33052cb2b59cbf3344/e8bc28c83391b5262fa385a865f8b6d03b13b6fb9756fe33052cb2b59cbf3344-json.log
-rw-r----- 1 root root 9.8K Dec  6 14:30 /var/lib/docker/containers/e8bc28c83391b5262fa385a865f8b6d03b13b6fb9756fe33052cb2b59cbf3344/e8bc28c83391b5262fa385a865f8b6d03b13b6fb9756fe33052cb2b59cbf3344-json.log

[root@VM-8-8-centos docker]# cat /dev/null >  /var/lib/docker/containers/f3e2ebcd67e7603e5f1312f2092f70e3d8d652aeb06d53d39233ec4e408ca9d5/f3e2ebcd67e7603e5f1312f2092f70e3d8d652aeb06d53d39233ec4e408ca9d5-json.log
[root@VM-8-8-centos docker]# ls -lah /var/lib/docker/containers/f3e2ebcd67e7603e5f1312f2092f70e3d8d652aeb06d53d39233ec4e408ca9d5/f3e2ebcd67e7603e5f1312f2092f70e3d8d652aeb06d53d39233ec4e408ca9d5-json.log
-rw-r----- 1 root root 0 Dec  6 14:32 /var/lib/docker/containers/f3e2ebcd67e7603e5f1312f2092f70e3d8d652aeb06d53d39233ec4e408ca9d5/f3e2ebcd67e7603e5f1312f2092f70e3d8d652aeb06d53d39233ec4e408ca9d5-json.log

永久解决

当然可以通过docker 配置文件的方式来限制日志的大小咯。

logging:
      driver: “json-file”
      options:
        max-size: “100m”

以上代码限制为100m