1. Problem description
When using Dockerfile to create a docker image on CentOS 7, the following error occurred:
[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]#Second, the cause of the error
The image name cannot be capitalized!
Created successfully after modification, as shown below:
[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]#Perfect solution!