K8S中Harbor使用Nginx反向代理无法获取image
问题：Kubernetes创建Pod失败，无法获取image
Failed create pod sandbox: rpc error: code = Unknown desc = failed pulling image “harbor.od.com/public/pause:latest”: Error response from daemon: Get http://harbor.od.com/v2/public/pause/manifests/latest: Get http://harbor.od.com:180/service/token?scope=repository%3Apublic%2Fpause%3Apull&service=harbor-registry: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers
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环境：
harbor.od.com二进制包安装，使用docker-compose启动，
harbor.yaml配置port：180
然后通过部署nginx，反向到后端harbor上
故障排查：
1.使用docker pull 仓库镜像也无法获取
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Error response from daemon: Get http://harbor.od.com/v2/public/pause/manifests/latest: Get http://harbor.od.com:180/service/token?scope=repository%3Apublic%2Fpaue%3Apull&service=harbor-registry: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
2.使用docker loginx登录Harbor
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Error response from daemon: Get https://harbor,od,com/v2/: dial tcp: lookup harbor,od,com: no such host
3.修改成使用IP的方式登录Harbor
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Error response from daemon: Get http://harbor.od.com/v2/: Get http://harbor.od.com:180/service/token?account=admin&client_id=docker&offline_token=true&service=habor-registry: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
分析问题：
docker使用Http请求获取镜像，harbor是通过nginx的80端口访问，但是通过Log上看到的是使用Get方式，另外还要带有域名加180端口方式验证，应该是配置问题引起
https://www.cnblogs.com/liucx/
解决问题：
修改harbor.yml配置文件，取消external_url注释，设置为：
external_url: http://harbor.od.com:80
然后，docker-compose down停止所有服务，删除当前配置目录：rm -rf ./common/config下配置清单，重新执行install.sh生成配置，即可解决
配置大概解释：如果使用外部代理就要启动该项
