Docker 운영 Tip (daemon.json)

Docker default bridge 네트워크 대역 변경

내부 사설 IP와의 출동 등의 이슈

daemon.json

• /etc/docker/daemon.json

{
  "default-address-pools": [
    {
      "base": "10.1.0.0/16",
      "size": 24
    }
  ]
}

• Docker restart

$ sudo systemctl restart docker

반영 전

$ ip a
...
4: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
    link/ether 02:42:82:58:25:33 brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever
...

반영 후

$ ip a
...
1519: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
    link/ether 02:42:c0:d9:e2:56 brd ff:ff:ff:ff:ff:ff
    inet 10.1.0.1/24 brd 10.1.0.255 scope global docker0
       valid_lft forever preferred_lft forever
...

Data root directory 경로 변경

• 기본 경로 : /var/lib/docker

daemon.json

• /etc/docker/daemon.json

{
  "data-root": "/docker",
  "default-address-pools": [
    {
      "base": "10.1.0.0/16",
      "size": 24
    }
  ]
}

$ sudo systemctl restart docker

$ sudo ls -l /docker
합계 0
drwx--x--x 4 root root 120  8월 18 11:51 buildkit
drwx------ 2 root root   6  8월 18 11:51 containers
drwx------ 3 root root  22  8월 18 11:51 image
drwxr-x--- 3 root root  19  8월 18 11:51 network
drwx------ 4 root root 112  8월 18 11:51 overlay2
drwx------ 4 root root  32  8월 18 11:51 plugins
drwx------ 2 root root   6  8월 18 11:51 runtimes
drwx------ 2 root root   6  8월 18 11:51 swarm
drwx------ 2 root root   6  8월 18 11:51 tmp
drwx------ 2 root root   6  8월 18 11:51 trust
drwx------ 2 root root  50  8월 18 11:51 volumes

Docker log 용량 관리

• https://docs.docker.com/config/containers/logging/json-file/
• /containers/

daemon.json

• /etc/docker/daemon.json

{
  "data-root": "/docker",
  "log-opts": {
    "max-size": "100m"
  },
  "default-address-pools": [
    {
      "base": "10.1.0.0/16",
      "size": 24
    }
  ]
}