OCI的目标是提供一个开放、标准化的容器技术基础，以促进容器技术的创新和应用,遵循这些规范，容器技术可以更好地支持跨平台和跨环境的部署，同时保持高效和安全.

1.clean containers logs

[root@k8s-master ~]# docker info |grep Root  //docker rootdir
 Docker Root Dir: /var/lib/docker

container logs:
/var/lib/docker/containers/container_id/xxxx.json.log

#list logs size
find /var/lib/docker/containers/ -name *-json.log |xargs du -sh

#reset log
cat /dev/null >/var/lib/docker/containers/xxxx/xxxx.log-json.log

2.docker-log-driver

#docker logs-driver type

    --log-driver=json-file  //default   /var/lib/docker/containers/xxxx/xxx.log

json-file
syslog
journald
gelf
fluentd
none   //关闭日志记录

#daemon.json

/etc/docker/daemon.json
{
    "registry-mirrors": [
        "http://f613ce8f.m.daocloud.io"
    ], 
    "log-driver": "json-file", 
    "log-opts": {
        "max-size": "100m", 
        "max-file": "3"
    }
}

systemctl daemon-reload  && systemctl restart docker

注意这个修改只对新容器生效，老容器不生效

3.rancher-set loglevel

docker exec -ti <container_id> loglevel --set trace/debug/info/error

4.logrotate

/etc/logrotate.d/docker
/var/lib/docker/containers/*/*.log {
    daily
    rotate 3
    compress
    delaycompress
    missingok
    copytruncate
}