1.在原有的docker服務基礎上，下拉一個 registry 映象：

docker pull registry:2.6.2

2.執行：

docker run -d -p 5000:5000 --restart=always --name registry registry:2.6.2

 3.將自己的映象推送到私有倉庫：

    例如：docker.io/langwanghuangshifu/eureka-server:latest

docker push localhost:5000/langwanghuangshifu/eureka-server:latest

    執行提示：

    The push refers to a repository [localhost:5000/langwanghuangshifu/eureka-server]
    An image does not exist locally with the tag: localhost:5000/langwanghuangshifu/eureka-server

    此時，會發現推送失敗，由於docke hub 為預設的映象倉庫，推送命令實質上為：docker push docker.io/langwanghuangshifu/eureka-server:latest

    因此需要將上述映象更改映象標籤:

docker tag langwanghuangshifu/eureka-server:latest localhost:5000/langwanghuangshifu/eureka-server:latest

    再次執行：

docker push localhost:5000/langwanghuangshifu/eureka-server:latest

    推送成功：