运行docker-compose或者输入 docker-compose --version 报错。

Question

运行docker-compose或者输入 docker-compose --version 报错。 不知道跟linux内核或者docker版本有没有关系。
报错信息:
Executing docker install script, commit: a8a6b338bdfedd7ddefb96fe3e7fe7d4036d945a
Warning: the "docker" command appears to already exist on this system.

If you already have Docker installed, this script can cause trouble, which is
why we're displaying this warning and provide the opportunity to cancel the
installation.

If you installed the current Docker package using this script and are using it
again to update Docker, you can safely ignore this message.

You may press Ctrl+C now to abort this script.

Answer 1

之前也是在网上找文章去安装docker-compose，只有一个能正常启动，
#安装docker

安装yum-utils

yum install -y yum-utils

配置yum源

yum-config-manager
--add-repo
https://download.docker.com/linux/centos/docker-ce.repo

安装docker-ce

yum install -y docker-ce

设置开机启动服务

systemctl enable docker

启动服务

systemctl start docker

#Docker compose安装

安装epel源

yum install -y epel-release

安装docker-compose，如果没有python3会安装python3

yum install -y docker-compose