docker registry 刪除鏡像 垃圾回收

操作步驟

1. 通過環境變量修改默認配置，允許刪除
2. 獲取image的sha值
3. 進入registry容器中，執行垃圾回收
4. 刪除殘留目錄

#環境變量 REGISTRY_STORAGE_DELETE_ENABLED=true 用於覆蓋默認設置
docker run -d -v /opt/registry:/var/lib/registry -e REGISTRY_STORAGE_DELETE_ENABLED=true -p 5000:5000 --restart=always --name registry registry:2

#聲明要刪除的鏡像名稱
image=...
#獲取sha
sha=`ls /opt/registry/docker/registry/v2/repositories/$image/_manifests/revisions/sha256`
#刪除 需替換registryurl
curl -XDELETE http://<registryurl>/v2/$image/manifests/sha256:$sha
#垃圾回收
docker exec -it registry sh
registry garbage-collect /etc/docker/registry/config.yml
exit
#刪除殘留目錄
rm -rf /opt/registry/docker/registry/v2/repositories/$image

參考：
https://docs.docker.com/registry/configuration/#delete
https://docs.docker.com/registry/garbage-collection/
https://blog.csdn.net/happyzwh/article/details/86300733
https://www.jianshu.com/p/2d63b0461a51