搭建自己的Docker(容器)镜像加速器
容器镜像加速服务器
本Github项目可快速部署容器镜像加速服务器。 由于配置格式及docker客户端配置限制， 本项目仅适用于使用containerd runtime的容器镜像加速。
本项目两个分支：
main: 使用nginx作为反向代理traefik: 使用traefik进行流量路由
前置要求
Python版本 3.8+- 安装
certbot（仅nginx版本需要，traefik版本不需要） - 安装
docker - 安装
docker compose - 一个公网可解析的域名
填写配置文件
在config.json中填写必要的配置：
registries: 需要加速的镜像站列表, 填写域名即可， 默认为https协议；domain: 加速器域名，需提前申请并注册到互联网名称服务器，公网可解析；email: 填写一个合法的邮箱地址即可
运行
执行以下命令
- 如使用
main分支代码将自动申请SSL证书(如在nginx/ssl目录下没有证书存在)，生成配置文件 - 如使用
traefik分支代码， 无需进行证书申请，traefik会自动连接Let’s Encrypt进行证书申请
然后启动加速器：
python3 main.py
输出内容例如：
Applying SSL certificate...
SSL certificate for docker.uglyduck.site is already present.
Generating registry server configurations...
registry-1.docker.io
docker.elastic.co
gcr.io
k8s.gcr.io
quay.io
nvcr.io
rocks.canonical.com
mcr.microsoft.com
Generating Nginx configuration...
Generating Docker Compose configuration...
Starting Docker Compose...
[+] Running 10/10
✔ Network mirror-server_default Created 0.1s
✔ Container registry-1_docker_io Started 0.2s
✔ Container mcr_microsoft_com Started 0.2s
✔ Container docker_elastic_co Started 0.2s
✔ Container nginx Started 0.2s
✔ Container gcr_io Started 0.2s
✔ Container rocks_canonical_com Started 0.2s
✔ Container quay_io Started 0.2s
✔ Container k8s_gcr_io Started 0.2s
✔ Container nvcr_io Started 0.2s
Docker Compose has started successfully.
关闭加速器
docker compose down
containerd客户端配置
- 为每个目标站点创建配置目录(目录名称可以随便写，能看懂即可)
mkdir -p /etc/containerd/certs.d/dockerhub # 源站点registry-1.docker.io
mkdir -p /etc/containerd/certs.d/quary # 源站点quary.io
...
- 为各个站点配置加速(配置文件名为
hosts.toml)
其中:
server为源镜像站点host.后面是加速器站点及uri, 格式为<加速器域名>/<源站点域名>
示例1: dockerhub加速配置
cat <<EOF > /etc/containerd/certs.d/dockerhub/hosts.tomal
server = "https://registry-1.docker.io"
[host."https://docker.uglyduck.site/registry-1.docker.io"]
capabilities = ["pull", "resolve"]
EOF
示例2: quary.io加速配置
cat <<EOF > /etc/containerd/certs.d/quary/hosts.tomal
server = "https://quary.io"
[host."https://docker.uglyduck.site/quary.io"]
capabilities = ["pull", "resolve"]
EOF
如上， 为每个需要加速的站点都进行上述配置。
重启containerd
systemctl restart containerd
测试配置
docker测试
docker需在/etc/docker/daemon.json中进行配置， 且只能加速dockerhub的镜像， 本项目不针对docker客户端加速。
使用ctr客户端测试
使用ctr命令拉取镜像时需要指定--hosts-dir参数：
ctr image pull docker.io/library/amazoncorretto:11 --hosts-dir /etc/containerd/certs.d
docker.io/library/amazoncorretto:11: resolved |++++++++++++++++++++++++++++++++++++++|
index-sha256:6c4b652bb05c91148d08c0c0856875725744d3368f195a7a1b4013910ba8efc0: exists |++++++++++++++++++++++++++++++++++++++|
manifest-sha256:c9ebd5d4c48014cc08040eec2adb3c1da77b3e1d1e47b05450dd088873f77c26: exists |++++++++++++++++++++++++++++++++++++++|
config-sha256:cb1efffd6bb7aeeaa2c36cb00d7201547c222f712ee80ed1aa856368f90272a4: exists |++++++++++++++++++++++++++++++++++++++|
layer-sha256:f956a2176a592b2f85941102c85f1a745c5e74f263c66fc5212bf9eb619f28e1: downloading |+++++++++++++++++++-------------------| 31.0 MiB/59.8 MiB
layer-sha256:88fcfc4c5843cedbd18a8793ed07b4046649d10f26bb1b69d14be76b565cb914: downloading |++++++++++++++++++++------------------| 75.0 MiB/141.3 MiB
elapsed: 5.7 s total: 106.0 (18.6 MiB/s)
使用nerdctl客户端测试
配置并重启containerd后， nerdctl可以自动识别到加速器配置：
nerdctl pull docker.io/library/amazoncorretto:11
docker.io/library/amazoncorretto:11: resolved |++++++++++++++++++++++++++++++++++++++|
index-sha256:6c4b652bb05c91148d08c0c0856875725744d3368f195a7a1b4013910ba8efc0: exists |++++++++++++++++++++++++++++++++++++++|
manifest-sha256:c9ebd5d4c48014cc08040eec2adb3c1da77b3e1d1e47b05450dd088873f77c26: exists |++++++++++++++++++++++++++++++++++++++|
config-sha256:cb1efffd6bb7aeeaa2c36cb00d7201547c222f712ee80ed1aa856368f90272a4: exists |++++++++++++++++++++++++++++++++++++++|
layer-sha256:88fcfc4c5843cedbd18a8793ed07b4046649d10f26bb1b69d14be76b565cb914: downloading |++++++++++++++------------------------| 54.0 MiB/141.3 MiB
layer-sha256:f956a2176a592b2f85941102c85f1a745c5e74f263c66fc5212bf9eb619f28e1: downloading |++++++--------------------------------| 11.0 MiB/59.8 MiB
elapsed: 2.1 s total: 65.0 M (30.9 MiB/s)