一、问题描述
在 CentOS 7 使用 Dockerfile 创建 docker 镜像的时候，出现如下错误：
[root@localhost client]# cat /etc/redhat-release
CentOS Linux release 7.6.1810 (Core)
[root@localhost client]#
[root@localhost client]# docker build -t="clientSocket:latest" .
invalid argument "clientSocket:latest" for t=clientSocket:latest: Error parsing reference: "clientSocket:latest" is not a valid repository/tag
See 'docker build --help'.
[root@localhost client]#二、错误原因
镜像名称不能有大写！
修改后创建成功，如下所示：
[root@localhost client]# docker build -t="clientsocket:latest" .
Sending build context to Docker daemon 4.096 kB
Step 1 : FROM centos:7
---> 8652b9f0cb4c
Step 2 : RUN yum install gcc -y
---> Using cache
---> aae47995580a
Step 3 : COPY . /work/socket
---> 44bcd2555495
Removing intermediate container 352f1fa2adab
Step 4 : WORKDIR /work/socket
---> Running in a5466d33eef1
---> 0453b5d33add
Removing intermediate container a5466d33eef1
Step 5 : RUN gcc -o client client.c
---> Running in f679f286a5a4
---> 74eab9bf677f
Removing intermediate container f679f286a5a4
Successfully built 74eab9bf677f
[root@localhost client]#完美解决！