Docker私有倉庫管理和刪除本地倉庫中的鏡像
一:Docker私有倉庫安裝
1、 下載鏡像是有鏡像倉庫:
[root@localhost ~]# systemctl start docker #如果已經(jīng)有鏡像了,強制刪除原來的鏡像的方式如下: [root@xxx-pub /]# docker rmi -f docker.io/registry Untagged: docker.io/registry:latest Untagged: docker.io/registry@sha256:51bb55f23ef7e25ac9b8313b139a8dd45baa832943c8ad8f7da2ddad6355b3c8 [root@xxx-pub /]# #開始下載最新的鏡像。 [root@localhost ~]# docker pull registry Using default tag: latest latest: Pulling from library/registry 4064ffdc82fe: Pull complete c12c92d1c5a2: Pull complete 4fbc9b6835cc: Pull complete 765973b0f65f: Pull complete 3968771a7c3a: Pull complete Digest: sha256:20bbbc0f6384cf7dc6e292ccbe75935b73c92ec776543c970904bc60feceb129 Status: Downloaded newer image for registry:latest [root@localhost ~]#
2、 啟動并且掛載鏡像倉庫到本地磁盤:
[root@xxx-pub /]# docker run -d -v /registry:/home/docker-registry -p 5000:5000 --restart=always --privileged=true --name registry registry:latest Unable to find image 'registry:latest' locally Trying to pull repository docker.io/library/registry ... latest: Pulling from docker.io/library/registry Digest: sha256:51bb55f23ef7e25ac9b8313b139a8dd45baa832943c8ad8f7da2ddad6355b3c8 Status: Downloaded newer image for docker.io/registry:latest b7bd2b14ed488936afe798be95f3cd56f604fb092d45cf6f4a58359bcad0d34c [root@xxx-pub /]#
- -v /registry:/home/docker-registry:默認情況下,會將倉庫存放于容器內的/home/docker-registry目錄下,指定本地目錄掛載到容器。
- -p 5000:5000 :端口映射。即本地5000端口,映射到registry中的5000端口。
- –restart=always1:在容器退出時總是重啟容器,主要應用在生產(chǎn)環(huán)境。
- –privileged=true:在CentOS7中的安全模塊selinux把權限禁掉了,參數(shù)給容器加特權,不加上傳鏡像會報類似權限錯誤。OSError: [Errno 13] Permission denied: ‘/tmp/registry/repositories/liibrary')或者(Received unexpected HTTP status: 500 Internal Server Error)
- –name registry:指定容器的名稱。
為了持久化數(shù)據(jù),將volume掛載到/home/docker-registry
3、 我們給一個本地鏡像打個標簽然后上傳:
查看本地有哪些鏡像:
[root@xxx-pub /]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE docker.io/centos centos7.5.1804 fdf13fa91c6e 4 weeks ago 200 MB docker.io/registry latest b2b03e9146e1 2 months ago 33.3 MB [root@xxx-pub /]#
以docker.io/centos為案例。
[root@xxx-pub /]# docker tag fdf13fa91c6e localhost:5000/xxx-centos7.5.1804:1.0 ##localhost:5000表示倉庫地址,fdf13fa91c6e表示images id,xxx-centos7.5.1804表示鏡像名稱,1.0表示版本號。 或: [root@xxx-pub /]# docker tag docker.io/centos:centos7.5.1804 localhost:5000/xxx-centos7.5.1804:1.0
4、 直接上傳:
[root@xxx-pub /]# docker push localhost:5000/xxx-centos7.5.1804:1.0 The push refers to a repository [localhost:5000/xxx-centos7.5.1804] bcc97fbfc9e1: Pushed 1.0: digest: sha256:7c14180942615fef85cb5c8b1388e028be1a8f79694a5fa30a4025173e42ad61 size: 529 [root@xxx-pub /]#
在PUSH的過程中可能報類似如下的錯誤(以下是網(wǎng)絡上的錯誤提示):
[root@localhost ~]# docker push 192.168.174.128:5000/hello:latest The push refers to a repository [192.168.174.128:5000/hello] unable to ping registry endpoint https://192.168.174.128:5000/v0/ v2 ping attempt failed with error: Get https://192.168.174.128:5000/v2/: http: server gave HTTP response to HTTPS client v1 ping attempt failed with error: Get https://192.168.174.128:5000/v1/_ping: http: server gave HTTP response to HTTPS client [root@localhost ~]#
解決辦法:
使用的是https,修改/etc/sysconfig/docker(這里是Centos7下的docker)文件,加上ADD_REGISTRY='–add-registry 192.168.18.162:5000',INSECURE_REGISTRY='–insecure-registry 192.168.18.162:5000' (上面是歷史的docker版本的配置),如下圖:
但是在新的docker容器倉庫的配置中,自己的docker容器中的配置采用(這里在docker registry和另外pull鏡像的機器上都指定如下的配置):
指定完成之后,要重啟docker,重啟的配置如下:
[root@youx-pub volumes]# systemctl restart docker
另外:查看一下docker.service,查看一下配置文件:
[root@youx-pub registry]find / -name docker.service /sys/fs/cgroup/memory/system.slice/docker.service /sys/fs/cgroup/devices/system.slice/docker.service /sys/fs/cgroup/blkio/system.slice/docker.service /sys/fs/cgroup/cpu,cpuacct/system.slice/docker.service /sys/fs/cgroup/pids/system.slice/docker.service /sys/fs/cgroup/systemd/system.slice/docker.service /usr/lib/systemd/system/docker.service [root@youx-pub registry]# vim /usr/lib/systemd/system/docker.service
然后執(zhí)行一下:
#因為可以用于systemctl啟動的docker.service文件變化了,所以得執(zhí)行以下配置。然后執(zhí)行docker的重啟工作 systemctl daemon-reload systemctl restart docker
如果還是報如下錯誤:
[root@youx-pub registry]# docker push 192.168.18.162:5000/nginx:1.2 The push refers to a repository [192.168.18.162:5000/nginx] Get https://192.168.18.162:5000/v1/_ping: http: server gave HTTP response to HTTPS client [root@youx-pub registry]#
解決辦法是:
在/etc/docker下創(chuàng)建daemon.json,內容是:
{"insecure-registries":["192.168.18.162:5000"]}
然后再重啟docker容器:
[root@youx-pub volumes]# systemctl restart docker
5、 上傳完成,我們可以查看一下掛載目錄是否有鏡像:
[root@xxx-pub docker-registry]# pwd /home/docker-registry [root@xxx-pub docker-registry] # ls /registry/ Docker
6、 關于本地鏡像的查看:
[root@xxx-pub docker-registry]# curl http://192.168.18.162:5000/v2/_catalog {"repositories":["xxx-centos7.5.1804","xxx-centos7.5.1804-v1.0"]} [root@xxx-pub docker-registry]#
7、 看到有兩個鏡像,我們要獲取他的標簽信息以便下載呢:
[root@xxx-pub docker-registry]# curl http://192.168.18.162:5000/v2/xxx-centos7.5.1804/tags/list {"name":"xxx-centos7.5.1804","tags":["1.0"]} [root@xxx-pub docker-registry]#
8、 然后我們直接下載鏡像(到另電腦上):
[root@bigdata2 ~]# docker pull 192.168.18.162:5000/youx-centos7.5.1804:1.0 Using default tag: latest Trying to pull repository 192.168.18.162/youx-centos7.5.1804 ... Get https://192.168.18.162/v1/_ping: dial tcp 192.168.18.162:443: getsockopt: no route to host [root@bigdata2 ~]#
如果出現(xiàn)上面的情況,解決辦法是:
編譯:
[root@youx-pub volumes]# vim /etc/containers/registries.conf 這個文件。 舊的是編輯:/etc/sysconfig/docker 這個文件
然后重啟docker
[root@youx-pub volumes]# systemctl restart docker
然后發(fā)現(xiàn)可以pull了
#要注意的是,這里的地址是:倉庫地址:倉庫端口號/REPOSITORY:TAG [root@bigdata2 ~]# docker pull 192.168.18.162:5000/youx-centos7.5.1804:1.0
如果還不行,需要修改/etc/docker/daemon.json,內容如下:
[root@bigdata2 docker]# cat daemon.json {"insecure-registries":["192.168.18.162:5000"]}
二、從另外一臺機器上上傳鏡像到docker鏡像倉庫:
[root@bigdata2 ~]# docker tag centos7-jdk8-nginx:1.0 192.168.18.162:5000/centos7-jdk8-nginx:1.0 [root@bigdata2 ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE 192.168.18.162:5000/centos7-jdk8-nginx 1.0 bcacd65e2a2e 2 minutes ago 2.18 GB [root@bigdata2 ~]# docker push 192.168.18.162:5000/centos7-jdk8-nginx:1.0 The push refers to a repository [192.168.18.162:5000/centos7-jdk8-nginx] f018e9c38a66: Pushed 2a47dcd341ef: Pushed c5dea3bc729a: Pushed bcc97fbfc9e1: Pushed 1.0: digest: sha256:d907ff2f8eb590209700c01ce85c78d0bc778a4238539d747e4667d68cb52102 size: 1163 [root@bigdata2 ~]#
然后進入docker鏡像倉庫所在位置:
[root@youx-pub registry]# curl http://192.168.18.162:5000/v2/_catalog {"repositories":["centos7-jdk8-nginx","nginx"]} [root@youx-pub registry]# curl http://192.168.18.162:5000/v2/centos7-jdk8-nginx/tags/list {"name":"centos7-jdk8-nginx","tags":["1.0"]} [root@youx-pub registry]#
三、本地鏡像如何刪除,正常是不提供刪除功能的,所以使用第三方的插件來進行刪除
插件github上的位置:
https://github.com/burnettk/delete-docker-registry-image
1、下載資源
[root@master registry]# curl https://raw.githubusercontent.com/burnettk/delete-docker-registry-image/master/delete_docker_registry_image.py | sudo tee /usr/local/bin/delete_docker_registry_image >/dev/null sudo chmod a+x /usr/local/bin/delete_docker_registry_image
2、 設置相關環(huán)節(jié)變量:
查找REGISTRY_DATA_DIR,命令: [root@youx-pub registry]# find / -name registry [root@youx-pub registry]# find / -name registry /var/lib/docker/overlay2/d72320cd67b42f7ae66342cc6dedab7abe5e89106de8c4919ec8c5a6e5940b09/diff/var/lib/ucf/registry /var/lib/docker/overlay2/92211417089f7be8239def550e1e89ce3f0e50ac57f2c36ba723ca312ea06ae3/diff/bin/registry /var/lib/docker/overlay2/c1716aea0b380eb94ead9aa02552769acd4c3dac8e6dab735997f1709ce79a33/diff/etc/docker/registry /var/lib/docker/overlay2/46f719f01255c431b4343e78607341d6d66ea482bc6d03c3b4e05e7413f46be6/diff/var/lib/registry /var/lib/docker/overlay2/46f719f01255c431b4343e78607341d6d66ea482bc6d03c3b4e05e7413f46be6/merged/bin/registry /var/lib/docker/overlay2/46f719f01255c431b4343e78607341d6d66ea482bc6d03c3b4e05e7413f46be6/merged/etc/docker/registry /var/lib/docker/overlay2/46f719f01255c431b4343e78607341d6d66ea482bc6d03c3b4e05e7413f46be6/merged/var/lib/registry /var/lib/docker/volumes/1522d54c954c755250cb71686cacd9714cd3d0f0c706ec18c1e490c7881fe713/_data/docker/registry /opt/data/registry /registry [root@youx-pub registry]# 發(fā)現(xiàn) [root@youx-pub repositories]# pwd /var/lib/docker/volumes/1522d54c954c755250cb71686cacd9714cd3d0f0c706ec18c1e490c7881fe713/_data/docker/registry/v2/repositories [root@youx-pub repositories]# ls centos7-jdk8-nginx nginx [root@youx-pub repositories]# 所以設置鏡像倉庫的位置為: [root@master registry]# export REGISTRY_DATA_DIR=/var/lib/docker/volumes/1522d54c954c755250cb71686cacd9714cd3d0f0c706ec18c1e490c7881fe713/_data/docker/registry/v2
地址就是咱們掛載地址:
看一下相關標簽:
[root@youx-pub registry]# curl http://192.168.18.162:5000/v2/_catalog {"repositories":["youx-centos7.5.1804","youx-centos7.5.1804-v1.0"]} [root@youx-pub registry]# curl http://192.168.18.162:5000/v2/youx-centos7.5.1804-v1.0/tags/list {"name":"youx-centos7.5.1804-v1.0","tags":["latest"]} [root@youx-pub registry]#
可以之后我們直接刪除:
[root@master registry]# delete_docker_registry_image --image youx-centos7.5.1804-v1.0:latest
INFO [2017-04-08 11:39:39,793] Deleting /registry/docker/registry/v2/repositories/nginx/_manifests/tags/v1
咱們再看一下本地倉庫的鏡像有幾個:
[root@master registry]# curl http://192.168.18.162:5000/v2/_catalog {"repositories":["youx-centos7.5.1804"]}
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