docker 移動 data-root 到其他資料夾

起因

步驟

1. 停止 docker service

   sudo systemctl stop docker

2. 檢查原有設定、複製檔案

   cat /etc/docker/daemon.json

   sudo rsync -azAHX /var/lib/docker /volume/docker-dataroot

3. 更換設定路徑

   option 1 modify docker config

   vi  /etc/docker/daemon.json
   {
     "data-root": "/volume/docker-dataroot"
   }

   *option 2 soft link folder**

   sudo mv /var/lib/docker /path-you-want-to-backup
   ln -s /volume/docker-dataroot/var/lib/docker

4. 重啟 docker service

   sudo systemctl start docker

Reference

https://stackoverflow.com/questions/52488300/how-to-change-root-dir-of-docker-on-ubuntu-18-04-lts-docker-change-location-of