问题1:fatal: unable to access ‘https://github.com/***/’: Operation timed out after 300032 milliseconds with 0 out of 0 bytes received

原因:链路的MTU导致,docker默认1500,应该主机或者路由有限制1450或者1340啥的,一般改为较小的1300就比较保险,参考Git clone command fails with timeout
解决:由于我是gitlab k8s runner的形式,设置参数如下Setting a MTU for dind

services:
  # include the docker-in-docker network service
  - name: docker:dind
    command: ["--mtu=1300"]

问题2:fatal: unable to access ‘https://github/***’: server certificate verification failed. CAfile: none CRLfile: none

原因:ca证书导致
解决:

  • 方式1:禁用gitlab ssl,dockerfile里添加 RUN git config --global http.sslVerify false
  • 方式2(推荐):安装更新ca,dockerfile里添加 RUN apt-get install -y ca-certificates && update-ca-certificates
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