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Docker Registry

前言 Docker 是围绕 Images 进行管理的 image.png 构建一个私有的镜像仓库可以更高效地管理镜像 在 Docker 中,镜像仓库叫 Registry A registry is Registry 是开源的,高弹性的,可以更为容易地对生产测试环境里的镜像进行定制化管理 The Registry is a stateless, highly scalable server side The Registry is open-source, under the permissive Apache license. 这里分享一下 Docker Registry 的相关基础,详细可以参阅 官方文档 Tip: 当前的最新版本为 Docker 1.10 Released on January 15, 2016

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Docker Registry

本文讲解如何实现Docker Registry,其实这个在第一篇Docker入门一文中已经简单介绍,本文仅是对一些细节做个说明。 Why Docker Registry? How to install Docker Registry? 其实创建私有的Docker仓库非常简单,只需要运行一个Registry容器即可,该容器存储在Docker HUB中。 docker run -d -p 5000:5000 -v /myregistry:/var/lib/registry registry -d 是后台启动容器。 5000 是 registry 服务端口。 -v 将容器 /var/lib/registry目录映射到宿主机的/myregistry,用于存放镜像数据。 需要注意的是在安装registry的节点和客户端需要访问私有Registry的节点都需要执行此步操作。 修改文之后执行以下命令重启节点docker。

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    empire-registry

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    Docker镜像仓库registry

    目前常用 registry 版本为 v2,registry v2 拥有断点续传、并发拉取镜像多层等特点。 : -itd:在容器中打开一个伪终端进行交互操作,并在后台运行; -v:把宿主机的/data/registry目录绑定 到 容器/var/lib/registry目录(这个 目录是registry ; --name registry:创建容器命名为registry,你可以随便命名; registry:latest:这个是刚才pull下来的镜像; 查看镜像仓库中的所有镜像 [root@localhost registry容器所映射的主机目录,所有的镜像文件都存放到/data/registry目录下 [root@localhost ~]# cd /data/registry [root@localhost registry]# ls docker 先来看一下目录构成情况 [root@localhost registry]# tree docker/ docker/ └── registry └─

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    Docker Registry16

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    Docker Registry7

    运行Registry [root@h104 ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED anaconda-ks.cfg certs dockerfile [root@h104 ~]# docker run -d -p 5000:5000 --restart=always --name registry -v `pwd`/data:/var/lib/registry -v `pwd`/certs:/certs -e REGISTRY_HTTP_TLS_CERTIFICATE=/certs/docker.crt -e REGISTRY_HTTP_TLS_KEY=/certs/docker.key registry:2 b578e321f33f6f2a0c34340b35239d1ce724c4523f3b2266bc01239658fc3f46 :2 "/bin/registry /etc/d" 6 seconds ago Up 5 seconds 0.0.0.0:5000->5000/tcp

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    Docker Registry9

    原因是证书中指定的主机名为 docker-registry 而不是 h104 [root@h103 ~]# vim /etc/hosts [root@h103 ~]# grep docker-registry /etc/hosts 192.168.100.104 h104 docker-registry [root@h103 ~]# docker push docker-registry:5000/ubuntu The push refers to a repository [docker-registry:5000/ubuntu] (len: 1) unable to ping registry endpoint https://docker-registry:5000/v0/ v2 ping attempt failed with error: Get https://docker-registry:5000 endpoint https://docker-registry:5000/v0/ v2 ping attempt failed with error: Get https://docker-registry

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    Docker Registry18

    [root@docker ~]# vim docker-compose.yml [root@docker ~]# cat docker-compose.yml registry2: restart : always image: registry:2 ports: - 5002:5002 environment: REGISTRY_AUTH:htpasswd REGISTRY_AUTH_HTPASSWD_REALM:Registry Realm REGISTRY_AUTH_HTPASSWD_PATH:/auth/htpasswd REGISTRY_HTTP_TLS_CERTIFICATE :/certs/docker.crt REGISTRY_HTTP_TLS_KEY:/certs/docker.key volumes: - /root/data:/var/lib/registry :htpasswd 是错的 REGISTRY_AUTH: htpasswd 是对的

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    Docker Registry13

    Registry负载均衡 目前可以使用多个容器共享存储的方式来实现负载均衡 下面的三点要一样: 存储空间 HTTP Secret 证书 Redis 缓存(如果有的话) ---- 访问控制 可以使用本地基础认证在 anaconda-ks.cfg certs dockerfile [root@docker ~]# mkdir auth [root@docker ~]# docker run --entrypoint htpasswd registry

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    Docker Registry14

    创建一个registry 这个registry 指定了卷 TLS加密 基础认证 先清掉docker中同名的registry,然后再创建,否则会报冲突,也可以给这个registry改为其它名字 [root v `pwd`/certs:/certs \ > -v `pwd`/auth:/auth \ > -e "REGISTRY_AUTH=htpasswd" \ > -e "REGISTRY_AUTH_HTPASSWD_REALM =Registry Realm" \ > -e "REGISTRY_AUTH_HTPASSWD_PATH=/auth/htpasswd" \ > -e "REGISTRY_HTTP_TLS_CERTIFICATE =/certs/docker.crt" \ > -e "REGISTRY_HTTP_TLS_KEY=/certs/docker.key" \ > registry:2 71de3ba937945006578d495ed09ec36ca141130e1e22b3083018b9d43a251767 /tcp registry 3d9f0915226f registry:2 "htpasswd -Bbn testus" 5 minutes ago

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    Docker Registry19

    [root@docker ~]# vim docker-compose.yml [root@docker ~]# cat docker-compose.yml registry2: restart : always image: registry:2 ports: - 5002:5002 environment: REGISTRY_AUTH: htpasswd REGISTRY_AUTH_HTPASSWD_REALM: Registry Realm REGISTRY_AUTH_HTPASSWD_PATH: /auth/htpasswd REGISTRY_HTTP_TLS_CERTIFICATE /registry - /root/certs:/certs - /root/auth:/auth [root@docker ~]# . ->5002/tcp root_registry2_1 71de3ba93794 registry:2 "/bin/registry /etc/d" 4 hours

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    Registry GC源码分析

    The Stpes to GC in product ###Steps: detect and make sure docker stop $registry docker run -it --name gc --rm --volumes-from registry registry:2.5.0 garbage-collect --dry-run /etc/registry/config.ym delete truely docker run -it --name gc --rm --volumes-from registry registry:2.5.0 garbage-collect /etc/registry/config.yml docker start $registry ###Code Analysis of Registry GC ? blobs marked eligible. for example, when the number of blobs marked eligible more than 500, trigger the Registry

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    Docker Registry10

    :5000/ubuntu The push refers to a repository [docker-registry:5000/ubuntu] (len: 1) unable to ping registry endpoint https://docker-registry:5000/v0/ v2 ping attempt failed with error: Get https://docker-registry :5000/ubuntu The push refers to a repository [docker-registry:5000/ubuntu] (len: 1) unable to ping registry endpoint https://docker-registry:5000/v0/ v2 ping attempt failed with error: Get https://docker-registry endpoint https://docker-registry:5000/v0/ v2 ping attempt failed with error: Get https://docker-registry

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    Docker Registry11

    push docker:5000/ubuntu The push refers to a repository [docker:5000/ubuntu] (len: 1) unable to ping registry push docker:5000/ubuntu The push refers to a repository [docker:5000/ubuntu] (len: 1) unable to ping registry

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    Docker Registry1

    概要 ---- 依赖 Registry 要求构建在不小于 1.6.0 版本的 Docker 引擎上 The Registry is compatible with Docker engine version 1.6.0 or higher ---- Registry的创建与销毁 创建运行Registry [root@h103 ~]# docker run -d -p 5000:5000 --name registry registry:2 Unable to find image 'registry:2' locally 2: Pulling from library/registry fcee8bcfe180: a842b52833778977f7b4466b90cc829e0f9aae725aebe3e32a5a6c407acd2a03 Status: Downloaded newer image for registry

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    Docker Registry2

    Downloaded newer image for ubuntu:latest docker.io/library/ubuntu: this image was pulled from a legacy registry Important: This registry version will not be supported in future versions of docker. VIRTUAL SIZE ubuntu latest 8693db7e8a00 9 hours ago 187.9 MB registry VIRTUAL SIZE ubuntu latest 8693db7e8a00 9 hours ago 187.9 MB registry localhost:5000/myfirstimage latest 8693db7e8a00 9 hours ago 187.9 MB registry

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    Docker Registry3

    推送镜像到Registry [root@h103 ~]# docker push localhost:5000/myfirstimage The push refers to a repository sha256:a27637294694a32300c5a9b94c9078709ec75216dd875fbdbc89acb0eb803401 size: 6806 [root@h103 ~]# ---- 从Registry 0 [root@h103 ~]# ---- 销毁Registry registry和其它实例没有任何区别,使用stop然后rm就可以便捷地进行销毁 [root@h103 ~]# docker ps :2 "/bin/registry /etc/d" 22 hours ago Up 2 minutes 0.0.0.0:5000->5000/tcp :2 "/bin/registry /etc/d" 22 hours ago Exited (2) 1 seconds ago

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    Docker Registry4

    部署本地Registry服务 [root@h103 ~]# docker run -d -p 5000:5000 --restart=always --name registry registry:2 :2 "/bin/registry /etc/d" 7 seconds ago Up 5 seconds 0.0.0.0:5000->5000/tcp registry [root@h103 ~]# docker pull ubuntu && docker tag ubuntu localhost:5000/ubuntu Using default Important: This registry version will not be supported in future versions of docker. registry [root@h103 ~]# docker stop registry && docker rm -v registry registry registry [root@h103 ~]

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    Docker Registry12

    push docker:5000/ubuntu The push refers to a repository [docker:5000/ubuntu] (len: 1) unable to ping registry

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    Docker Registry20

    : restart: always image: registry:2 ports: - 5002:5000 environment: REGISTRY_AUTH: htpasswd REGISTRY_AUTH_HTPASSWD_REALM: Registry Realm REGISTRY_AUTH_HTPASSWD_PATH: /auth/htpasswd REGISTRY_HTTP_TLS_CERTIFICATE: /certs/docker.crt REGISTRY_HTTP_TLS_KEY: /certs/docker.key volumes tcp registry 3d9f0915226f registry:2 "htpasswd -Bbn testus" 4 hours ago Exited tcp root_registry2_1 71de3ba93794 registry:2 "/bin/registry /etc/d" 4 hours ago

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