Installing Docker on CentOS 6 after removal of docker-io

Question

For some time, the docker-io package has been used to install Docker on CentOS 6.

Since early this month, this package no longer appears to be available:

[[email protected]:0 yum.repos.d]# yum install docker-io
Loaded plugins: fastestmirror, presto
Setting up Install Process
Determining fastest mirrors
 * base: mirror.intergrid.com.au
 * extras: mirror.ventraip.net.au
 * updates: mirror.ventraip.net.au
base                                                                 | 3.7 kB     00:00
base/primary_db                                                      | 4.7 MB     00:00
epel                                                                 | 4.7 kB     00:00
epel/primary_db                                                      | 6.0 MB     00:00
extras                                                               | 3.4 kB     00:00
extras/primary_db                                                    |  28 kB     00:00
updates                                                              | 3.4 kB     00:00
updates/primary_db                                                   | 3.2 MB     00:00
No package docker-io available.
Error: Nothing to do

docker-io was previously part of the epel repository and has been the recommended way to install Docker (albeit, an older version) on CentOS 6 in a number of places.

Is there any other way Docker can be installed on CentOS 6?

Answer 1

I'm not sure why docker-io suddenly disappeared, but the same version previously available through the epel repository can be installed directly from this rpm hosted by Docker:

[root@server]# yum install
https://get.docker.com/rpm/1.7.1/centos-6/RPMS/x86_64/docker-engine-1.7.1-1.el6.x86_64.rpm

[root@server]# docker --version
Docker version 1.7.0, build 0baf609

Answer 2

You should install docker-engine from epel-release:

1. Add docker repository for installing latest copy of Docker for Centos 6

Update, install epel repo then create a repo called docker.repo and fill in the information for docker repo:

[user@docker7 ~]# sudo yum update -y
[user@docker7 ~]# sudo yum install epel-release
[user@docker7 ~]# sudo vi /etc/yum.repos.d/docker.repo

[docker-repo]
name=Docker Repo
baseurl=https://yum.dockerproject.org/repo/main/centos/$releasever/
enabled=1
gpgcheck=1
gpgkey=https://yum.dockerproject.org/gpg

2. Install docker package, then enable the service to start upon reboot, also start the docker service.

Now install docker-engine and enable docker to start at boot with systemctl. Then enable docker command and also start docker with systemctl start docker

              For centos 7 
[user@docker7 ~]$ sudo yum install -y docker-engine
[user@docker7 ~]$ sudo systemctl enable docker
[user@docker7 ~]$ sudo systemctl start docker
[user@docker7 ~]$ sudo systemctl status docker

              For centos 6 
[user@docker7 ~]$ sudo chkconfig docker on 
[user@docker7 ~]$ sudo service docker start 
[user@docker7 ~]$ sudo service docker status

[user@docker7 ~]$ ps aux | grep docker
root      2382  0.3  1.4 498424 26536 ?        Ssl  20:17   0:00 /usr/bin/dockerd
root      2385  0.0  0.2 263104  5568 ?        Ssl  20:17   0:00 docker-containerd -l unix:///var/run/docker/libcontainerd/docker-containerd.sock --metrics-interval=0 --start-timeout 2m --state-dir /var/run/docker/libcontainerd/containerd --shim docker-containerd-shim --runtime docker-runc

3.Manage Docker as a non-root user