docker限制容器日志大小

容器日志一般存放在/var/lib/docker/containers/container_id/下面，以json.log结尾的文件(业务日志)很大.

临时清空日志

# 注意不能用rm命令
cat /dev/null > /var/lib/docker/containers/容器id/容器id-json.log

如果是docker-compose
通过配置容器docker-compose.yml的max-size选项来实现:

nginx: 
image: nginx:1.12.1 
restart: always 
logging: 
  driver: "json-file"
  options: 
    max-size: "5g"

限制docker容器日志大小

// vim /etc/docker/daemon.json
{
"log-driver":"json-file",
"log-opts": {"max-size":"500m", "max-file":"3"}
}

重启docker生效

systemctl daemon-reload
systemctl restart docker