Source-to-image构建镜像的时候，总是显示镜像拉取失败，然后重新拉取镜像，一直这样循环往复。
下面是部分日志信息：
2019-12-17T06:37:55.79355462Z I1217 06:37:55.793382 1 cleanup.go:33] Removing temporary directory /tmp/s2i556422677
2019-12-17T06:37:55.793600785Z I1217 06:37:55.793415 1 fs.go:302] Removing directory ‘/tmp/s2i556422677′
2019-12-17T06:37:55.805300619Z I1217 06:37:55.805018 1 s2i.go:75] Build failed
2019-12-17T06:37:55.805340446Z E1217 06:37:55.805050 1 errors.go:307] An error occurred: non-zero (13) exit code from kubesphere/python-36-centos7:v2.1.0
