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vim /etc/containerd/config.toml

128     [plugins."io.containerd.grpc.v1.cri".registry]
129       [plugins."io.containerd.grpc.v1.cri".registry.mirrors."172.31.7.104"]
130         endpoint = ["http://172.31.7.104"]
131       [plugins."io.containerd.grpc.v1.cri".registry.mirrors."harbor.12345.com"]
132         endpoint = ["http://harbor.12345.com"]
133       config_path = ""
134 
135       [plugins."io.containerd.grpc.v1.cri".registry.auths]
136 
137       [plugins."io.containerd.grpc.v1.cri".registry.configs]
138         [plugins."io.containerd.grpc.v1.cri".registry.configs."172.31.7.104".tls]
139           insecure_skip_verify = true
140         [plugins."io.containerd.grpc.v1.cri".registry.configs."172.31.7.104".auth]
141           username='admin'
142           password='123456'
143         [plugins."io.containerd.grpc.v1.cri".registry.configs."harbor.12345.com".tls]
144           insecure_skip_verify = true
145         [plugins."io.containerd.grpc.v1.cri".registry.configs."harbor.12345.com".auth]
146           username='admin'
147           password='123456'




systemctl restart containerd

crictl info
...
    "registry": {
      "configPath": "",
      "mirrors": {
        "172.31.7.104": {
          "endpoint": [
            "http://172.31.7.104",
            "http://harbor.12345.com"
          ]
        },
        "docker.io": {
          "endpoint": [
            "https://docker.mirrors.ustc.edu.cn",
            "http://hub-mirror.c.163.com"
          ]
        },
        "gcr.io": {
          "endpoint": [
            "https://gcr.mirrors.ustc.edu.cn"
          ]
        },
        "harbor.12345.com": {
          "endpoint": [
            "http://harbor.12345.com"
          ]
...