How to install docker in centos6.5

I eat strawberries 2021-01-22 11:27:30
install docker centos6.5 centos


1、 Upgrade the kernel , Because the default kernel does not support docker function ,docker It is generally required that the kernel version be in 3.10 above

(1) View kernel version

$ uname -r

(2) Import public key digital certificate

$ rpm -Uvh https://www.elrepo.org/elrepo-release-6-8.el6.elrepo.noarch.rpm

It should be noted that , According to the official website ,centos6.x The corresponding certificates are all like this

(3) install ELRepo

$ rpm -ivh http://www.elrepo.org/elrepo-release-6-5.el6.elrepo.noarch.rpm

(4) install kernel-lt(lt=long-term)

$ yum --enablerepo=elrepo-kernel install kernel-lt -y

(5) edit grub.conf file , modify Grub The order of guidance , Confirm where the newly installed kernel is , Then set the default value ( from 0 Start ), Generally, the newly installed kernel is in the first position , So set default=0.

# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,0)
# kernel /vmlinuz-version ro root=/dev/mapper/vg_eypdyf83-lv_root
# initrd /initrd-[generic-]version.img
#boot=/dev/sda
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (4.4.163-1.el6.elrepo.x86_64)

(6) Restart the system , Looking at the system kernel, you can see that the kernel has been updated

2、 install docker

(1) Ban selinux, because selinux and LXC There are conflicts , So it needs to be disabled

# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled # You can modify it here
# SELINUXTYPE= can take one of these two values:
# targeted - Targeted processes are protected,
# mls - Multi Level Security protection.
SELINUXTYPE=targeted

(2) install Fedora EPEL

$ yum -y install http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

(3) install docker

$ yum install -y docker-io

(4) Run in guard mode Docker

$ docker -d

(5) take Docker Boot up

$ chkconfig docker on

(6) start-up Docker

$ service docker start

3、 establish docker User group

By default ,docker The command will use Unix socket And Docker Engine Communications . And only root Users and docker Only users of the group can access Docker Engine Unix socket. For safety reasons , commonly Linux It will not be used directly on the system root user . therefore , Better yet, it will need to be used docker Of users joining docker User group .

(1) Create user group

$ sudo groupadd docker

(2) Add current user to user group

$ sudo usermod -aG docker $USER

(3) You can also create a new user to join docker User group

$ sudo usermod -aG docker dockerio
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