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建立自己的docker repository

6个月前 15 分钟

如果你不知道docker是什么，请参考 这个slides。

在 ubuntu 下安装 docker 请参考 官方教程 。注意，由于 docker 的核心技术是 Linux container，所以如果想在 osx 下安装 docker 请使用 vagrant。

安装docker-registry

首先clone docker-registry：

$ git clone https://github.com/dotcloud/docker-registry
$ cd docker-registry

$ cp config_sample.yml config.yml

然后打开 config.yml，设置dev（缺省）的storage路径为 /var/docker/registry：

# This is the default configuration when no flavor is specified
dev:
    storage: local
    storage_path: /var/docker/registry
    loglevel: debug

创建这个目录：

$ sudo mkdir -p /var/docker/registry
$ sudo chown -R tchen /var/docker

docker-registry使用了python，需要以下库的支持：

$ sudo apt-get install build-essential python-dev libevent-dev python-pip libssl-dev

然后建立 virtualenv 并安装requirements：

$ sudo pip install virtualenv
$ virtualenv --no-site-packages venv
$ . venv/bin/activate
$ pip install -r requirements.txt

配置supervisor

如果系统没有安装supervisor，请先安装:

$ sudo apt-get install supervisor

安装完成后，配置 supervisor：

$ sudo vim /etc/supervisor/conf.d/docker-registry.conf

填入以下内容：

[program:docker-registry]
directory=/home/dev/deployment/docker-registry
user=dev
command=/home/dev/deployment/docker-registry/venv/bin/gunicorn -b 0.0.0.0:7030 -k gevent --max-requests 100 --graceful-timeout 3600 -t 3600 -w 8 wsgi:application
redirect_stderr=true
stderr_logfile=none
stdout_logfile=/var/log/supervisor/docker-registry.log
autostart=true
autorestart=true

重新加载 supervisor 配置：

$ sudo supervisorctl
supervisor> reread
docker-registry: available
supervisor> update
docker-registry: added process group
supervisor> status
docker-registry                  RUNNING    pid 4371, uptime 0:00:01

这样，docker-registry 服务就正常运行了。

配置nginx

接下来把 nginx request proxy 到 docker-registry app 就大功告成了。

$ sudo vim /etc/nginx/sites-available/docker-registry

填入以下内容：

server {
  listen 80;
  client_max_body_size 200m;
  server_name docker.your-domain.com;
  access_log /var/log/nginx/docker-registry.access.log;
  error_log /var/log/nginx/docker-registry.error.log;
  location / {
    proxy_pass http://localhost:7030;
    include /etc/nginx/proxy_params;
  }
}

然后将其加入 sites-enabled 并重启nginx：

$ cd /etc/nginx/sites-enabled/
$ sudo ln -s ../sites-available/docker-registry docker-registry
$ sudo /etc/init.d/nginx restart

把 docker 二级域名加入到你的域名服务器中，然后打开浏览器访问 http://docker.your-domain.com 就可以看到如下页面：

"docker-registry server (dev)"

至此，docker-registry 就正常运行了。

接下来看看系统都有哪些 docker images：

(venv)tchen@docker:~$ sudo docker images
REPOSITORY                            TAG                   IMAGE ID            CREATED             SIZE
colinsurprenant/ubuntu-raring-amd64   latest                2eb422301015        6 weeks ago         91.89 MB (virtual 91.89 MB)
colinsurprenant/ubuntu-raring-amd64   raring-amd64          2eb422301015        6 weeks ago         91.89 MB (virtual 91.89 MB)
colinsurprenant/ubuntu-raring-amd64   ubuntu-raring-amd64   22ca6d4b1576        6 weeks ago         91.89 MB (virtual 91.89 MB)
ubuntu                                12.04                 8dbd9e392a96        7 months ago        131.5 MB (virtual 131.5 MB)
ubuntu                                latest                8dbd9e392a96        7 months ago        131.5 MB (virtual 131.5 MB)
ubuntu                                precise               8dbd9e392a96        7 months ago        131.5 MB (virtual 131.5 MB)
ubuntu                                12.10                 b750fe79269d        7 months ago        24.65 kB (virtual 180.1 MB)
base                                  latest                b750fe79269d        7 months ago        24.65 kB (virtual 180.1 MB)
ubuntu                                quantal               b750fe79269d        7 months ago        24.65 kB (virtual 180.1 MB)
base                                  ubuntu-12.10          b750fe79269d        7 months ago        24.65 kB (virtual 180.1 MB)
base                                  ubuntu-quantal        b750fe79269d        7 months ago        24.65 kB (virtual 180.1 MB)
base                                  ubuntu-quantl         b750fe79269d        7 months ago        24.65 kB (virtual 180.1 MB)

我们选择 base 对应的 image，将其 push 到自己的服务器。首先将其标记为要push到自己的服务器：

$ sudo docker tag b750fe79269d docker.your-domain.com/tchen/base

然后push:

$ sudo docker push docker.your-domain.com/tchen/base
The push refers to a repository [docker.your-domain.com/tchen/base] (len: 1)
Sending image list
Pushing repository docker.your-domain.com/tchen (1 tags)
Pushing 27cf784147099545

2013/11/12 03:35:18 Received HTTP code 413 while uploading layer: <html>
<head><title>413 Request Entity Too Large</title></head>
<body bgcolor="white">
<center><h1>413 Request Entity Too Large</h1></center>
<hr><center>nginx/1.4.3</center>
</body>
</html>

如果出现以上错误，请修改之前nginx配置中的 client_max_body_size 200m;，将其扩大至能够容纳你的image。

成功后可以看到：

$ sudo docker images
REPOSITORY                            TAG                   IMAGE ID            CREATED             SIZE
colinsurprenant/ubuntu-raring-amd64   latest                2eb422301015        6 weeks ago         91.89 MB (virtual 91.89 MB)
colinsurprenant/ubuntu-raring-amd64   raring-amd64          2eb422301015        6 weeks ago         91.89 MB (virtual 91.89 MB)
colinsurprenant/ubuntu-raring-amd64   ubuntu-raring-amd64   22ca6d4b1576        6 weeks ago         91.89 MB (virtual 91.89 MB)
ubuntu                                12.04                 8dbd9e392a96        7 months ago        131.5 MB (virtual 131.5 MB)
ubuntu                                latest                8dbd9e392a96        7 months ago        131.5 MB (virtual 131.5 MB)
ubuntu                                precise               8dbd9e392a96        7 months ago        131.5 MB (virtual 131.5 MB)
ubuntu                                12.10                 b750fe79269d        7 months ago        24.65 kB (virtual 180.1 MB)
docker.your-domain.com/base              latest                b750fe79269d        7 months ago        24.65 kB (virtual 180.1 MB)
base                                  latest                b750fe79269d        7 months ago        24.65 kB (virtual 180.1 MB)
docker.your-domain.com/tchen             latest                b750fe79269d        7 months ago        24.65 kB (virtual 180.1 MB)
docker.your-domain.com/tchen/base        latest                b750fe79269d        7 months ago        24.65 kB (virtual 180.1 MB)
ubuntu                                quantal               b750fe79269d        7 months ago        24.65 kB (virtual 180.1 MB)
base                                  ubuntu-12.10          b750fe79269d        7 months ago        24.65 kB (virtual 180.1 MB)
base                                  ubuntu-quantal        b750fe79269d        7 months ago        24.65 kB (virtual 180.1 MB)
base                                  ubuntu-quantl         b750fe79269d        7 months ago        24.65 kB (virtual 180.1 MB)

本地的image就可用了，尝试一下：

$ sudo docker run -i -t docker.your-domain.com/tchen/base /bin/bash

在其他机器上要pull这个image，很简单：

$ sudo docker pull docker.your-domain.com/tchen/base
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