Does docker support centos6 installation?

Docker supports centos6 installation; official documents require that "Linux kernel" must be at least 3.8 to install docker, and docker can only run in 64-bit systems, because the kernel versions of "RHEL6" and "CentOS6" are 2.6, so you must first upgrade the kernel of the "CentOS6" system before installing it.

The operating environment of this tutorial: centos6.5 system, docker version 19.03, Dell G3 computer.

docker supports centos6 installation

Official documents require Linux kernel to be at least 3.8, and docker can only run on 64-bit systems. Since the kernel version of RHEL6 and CentOS6 is 2.6, the kernel must be upgraded first.

Docker is an open source application container engine that can easily create a lightweight, portable, self-sufficient container for any application. LXC, AUFS, Go language, and cgroups of Linux are used to achieve resource independence, and isolation of files, resources, networks, etc. can be easily achieved. The ultimate goal is to achieve application isolation similar to PaaS platforms.

The following takes CentOS6.5 (64-bit) as an example to introduce the docker installation steps and usage:

1. Upgrade the kernel (with aufs module)

1. Use yum to install the 3.10 kernel with aufs module

cd  /etc/yum .repos.d 
wget http: //www .hop5. in /yum/el6/hop5 .repo
yum  install  kernel-ml-aufs kernel-ml-aufs-devel

2. Modify grub’s main configuration file /etc/grub.conf and set default=0, which means the content under the first title is The kernel that is started by default (generally the newly installed kernel is in the first position).

3. Restart the system. At this time, your kernel will be successfully upgraded.

[root@localhost ~] # uname -r
3.10.5-3.el6.x86_64

Check whether the kernel supports aufs:

[root@localhost ~] # grep aufs /proc/filesystems
nodev    aufs

2. Install docker

1. First close selinux:

setenforce 0
sed  -i  '/^SELINUX=/c\SELINUX=disabled'  /etc/selinux/config

2 . The docker-io package has been provided in the Fedora EPEL source. Download and install epel:

rpm -ivh http: //mirrors .sohu.com /fedora-epel/6/x86_64/epel-release-6-8 .noarch.rpm
sed  -i  's/^mirrorlist=https/mirrorlist=http/'  /etc/yum .repos.d /epel .repo

3. Install docker-io with yum:

yum -y  install  docker-io

service docker start

## Check the docker log:

cat  /var/log/docker

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