正文
上一篇，我们已经成功通过 registry 搭建了一个 docker 私有仓库，但仔细点我们会发现，在拉取和推送镜像时，需要附加 --insecure-registry 参数，很不方便，这次来优化一下这块。
一、生成证书
- 生成 CA 根证书
openssl genrsa -out ca.key 2048 openssl req -x509 -new -nodes -key ca.key -subj "/CN=<YOUR IP>" -days 36500 -out ca.crt
- 生成registry ca 证书
cat > domain_ssl.cnf <<EOF [ req ] req_extensions = v3_req distinguished_name = req_distinguished_name [ req_distinguished_name ] [ v3_req ] basicConstraints = CA:FALSE keyUsage = nonRepudiation, digitalSignature, keyEncipherment subjectAltName = @alt_names [ alt_names ] DNS.1 = <YOUR HOSTNAME> IP.1 = <YOUR IP> EOF
- DNS.1 写成 registry 的访问域名
- IP.1 写成 registry 所在的机器的IP
- 生成 key 和 crt
openssl genrsa -out domain.key 2048 openssl req -new -key domain.key -config etcd_ssl.cnf -subj "/CN=etcd-server" -out domain.csr openssl x509 -req -in domain.csr -CA ca.crt -CAkey ca.key -CAcreateserial -days 36500 -extensions v3_req -extfile domain_ssl.cnf -out domain.crt
- 将
domain.crt和domain.key复制到/etc/docker/registry/certs/目录
二、配置systemd环境变量
systemctl edit registryd
文件内容如下：
[Service] Environment="REGISTRY_HTTP_TLS_CERTIFICATE=/etc/docker/registry/certs/domain.crt" Environment="REGISTRY_HTTP_TLS_KEY=/etc/docker/registry/certs/domain.key"
重启并查看服务状态：
[root@qijing0 ~]# systemctl restart registryd && systemctl status registryd ● registryd.service - private registry Loaded: loaded (/usr/lib/systemd/system/registryd.service; enabled; vendor preset: disabled) Drop-In: /etc/systemd/system/registryd.service.d └─override.conf Active: active (running) since Mon 2022-11-21 23:08:20 EST; 8ms ago Docs: https://github.com/distribution/distribution#readme Main PID: 15662 (registry) Tasks: 5 Memory: 6.5M CGroup: /system.slice/registryd.service └─15662 /usr/bin/registry serve /etc/docker/registry/config.yml Nov 21 23:08:20 qijing0 systemd[1]: Started private registry.
三、在客户端机器安装证书
复制 domain.crt 到 /etc/containerd/certs.d/domain/ 目录下。
并重启 containerd
四、验证
推送镜像验证：
[root@k8s0 server]# nerdctl push domain/test-server:0.0.5 INFO[0000] pushing as a reduced-platform image (application/vnd.docker.distribution.manifest.v2+json, sha256:e0f152bb79f22dcbaaf4429cf8bc3cff75d831a5bee8042acf018560f5900586) manifest-sha256:e0f152bb79f22dcbaaf4429cf8bc3cff75d831a5bee8042acf018560f5900586: done |++++++++++++++++++++++++++++++++++++++| config-sha256:cf3c9b089da1f8120c9ee912752dd14d56d7ef769d81d6a81423dea7324a3e5b: done |++++++++++++++++++++++++++++++++++++++| elapsed: 0.1 s total: 6.4 Ki (63.3 KiB/s)
- 可以看到现在能正常推送镜像了
拉取镜像验证：
[root@k8s1 tmp]# nerdctl pull registry.domain.cn/test-server:0.0.5 registry.domain.cn/test-server:0.0.5: resolved |++++++++++++++++++++++++++++++++++++++| manifest-sha256:e0f152bb79f22dcbaaf4429cf8bc3cff75d831a5bee8042acf018560f5900586: done |++++++++++++++++++++++++++++++++++++++| config-sha256:cf3c9b089da1f8120c9ee912752dd14d56d7ef769d81d6a81423dea7324a3e5b: done |++++++++++++++++++++++++++++++++++++++| elapsed: 0.1 s total: 0.0 B (0.0 B/s) [root@k8s1 tmp]# date Tue Nov 22 13:54:41 CST 2022
- 可以看到现在能正常拉取镜像了
【附加1】、安装 konradkleine/docker-registry-frontend:v2 用户界面
上一节安装的是joxit/docker-registry-ui，没升级成https之前还蛮好使用的，升级之后，就一直报 CORS 跨域错误，折腾了会，还是决定换一个用户界面程序，来支持 https：
docker run \ -d \ -e ENV_DOCKER_REGISTRY_HOST=registry.domain.cn \ -e ENV_DOCKER_REGISTRY_PORT=443 \ -e ENV_DOCKER_REGISTRY_USE_SSL=1 \ -p 5001:80 \ konradkleine/docker-registry-frontend:v2
安装完之后，也不是一帆风顺，刚开始也获取不到镜像列表，我从浏览器访问，按f12之后，发现解析不了域名，于是手动进入容器内部，在 /etc/hosts 中添加了域名：
[root@qijing0 ~]# docker exec -it 6d /bin/bash root@6d48c37a52c5:/# cat >>/etc/hosts<<EOF > 192.168.3.1 registry.domain.cn > EOF
ok!，现在可以了，通过浏览器能顺利访问到镜像列表了，足够了。
用户界面首页
镜像列表
