Docker pull 提示manifest unknown的报错

  今天构建一个Docker镜像推送到仓库时候提示错误

root@hwZ:~/DocHub# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
alfhua/dochub       v2.4                a81da441cfec        9 minutes ago       1.67GB
<none>              <none>              ef1268068df4        50 minutes ago      140MB
ubuntu              16.04               005d2078bdfa        4 weeks ago         125MB
root@hwZ:~/DocHub# docker pull alfhua/dochub:v2.4.latest
Error response from daemon: manifest for alfhua/dochub:v2.4.latest not found: manifest unknown: manifest unknown

  解决方法：加了一个latest标签即可

root@hwZ:~/DocHub# docker tag a81 alfhua/dochub:latest
root@hwZ:~/DocHub# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
alfhua/dochub       latest              a81da441cfec        18 minutes ago      1.67GB
alfhua/dochub       v2.4                a81da441cfec        18 minutes ago      1.67GB
<none>              <none>              ef1268068df4        59 minutes ago      140MB
ubuntu              16.04               005d2078bdfa        4 weeks ago         125MB
root@iZj6caw7yt2qgf4ax16ohwZ:~/DocHub# docker push alfhua/dochub
The push refers to repository [docker.io/alfhua/dochub]
ca7a09c80a7b: Pushed 
b4673298366c: Pushed 
……
4a048ea09024: Layer already exists 
b592b5433bbf: Layer already exists 
v2.4: digest: sha256:85a0713fa451a2c086a0082dd645f16d00634e62ef9ec2d3a0fce77236718e61 size: 2205