修改docker數(shù)據(jù)存儲路徑
docker的默認的數(shù)據(jù)存儲路徑為/var/lib/docker/舍哄，如果其所在磁盤空間較小誊锭，容易出現(xiàn)磁盤空間不足的問題表悬，這是就需要修改docker的數(shù)據(jù)存儲路徑丧靡，并遷移數(shù)據(jù)
docker的數(shù)據(jù)存儲路徑可通過docker info命令查看
[root]# docker info
...
Docker Root Dir: /var/lib/docker/
Debug Mode: false
Registry: https://index.docker.io/v1/
...
1.執(zhí)行命令df -h蟆沫，找一個大的磁盤温治， 然后創(chuàng)建新的數(shù)據(jù)目錄
df -h
mkdir -p /data/docker/lib
2.停止docker服務(wù)
systemctl stop docker
3.遷移/var/lib/docker目錄下的數(shù)據(jù)到新創(chuàng)建的目錄/data/docker/lib
rsync -avz /var/lib/docker /data/docker/lib/
4.修改docker配置文件/etc/docker/daemon.json饭庞，默認沒有熬荆，需要自己創(chuàng)建
{
"data-root": "/data/docker/lib/docker"
}
5.然后重啟docker服務(wù)就ok了
systemctl daemon-reload
systemctl restart docker
6.執(zhí)行docker info確認一下Docker Root Dir修改是否已經(jīng)生效
[root]# docker info
...
Docker Root Dir: /a8root/data/docker/lib/docker
Debug Mode: false
Registry: https://index.docker.io/v1/
...
7.執(zhí)行docker images 和docker ps -a 確認一下之前的鏡像和容器是否正常
[root@tx3-suggest-dev08 docker]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
mysql 5.7 6c20ffa54f86 7 days ago 448MB
redis latest fad0ee7e917a 2 months ago 105MB
tensorflow/serving 2.3.0 e0fe79fbb64f 12 months ago 286MB
elasticsearch 7.2.0 0efa6a3de177 2 years ago 861MB
elasticsearch 5.6.3 7e555e9f4ab4 3 years ago 581MB
[root@tx3-suggest-dev08 docker]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
a8ad4663a11b mysql:5.7 "docker-entrypoint.s…" 5 days ago Exited (0) About an hour ago mysql
2ca8588f37a5 elasticsearch:5.6.3 "/docker-entrypoint.…" 2 months ago Exited (143) 2 hours ago es
c9645fe96ce8 elasticsearch:7.2.0 "/usr/local/bin/dock…" 2 months ago Exited (143) 2 months ago elasticsearch
9ddbadad9900 redis "docker-entrypoint.s…" 2 months ago Exited (0) 2 hours ago redis-test
8.確定沒問題后就可以刪除/var/lib/docker/目錄中的文件來釋放磁盤空間了
rm -rf /var/lib/docker
