位置：/etc/containers/registries.conf
unqualified-search-registries = ["docker.io", "registry.access.redhat.com"]
[[registry]]
prefix = "docker.io"
insecure = false
blocked = false
location = "docker.io"
[[registry.mirror]]
location = "xxx.mirror.aliyuncs.com"
[[registry.mirror]]
location = "hub-mirror.c.163.com"
[[registry]]
prefix = "k8s.gcr.io"
location = "registry.aliyuncs.com/google_containers"
