Docker Installation and kernel upgrades

Docker Installation and CentOS Kernel Upgrade

1.installationDocker

[email protected] ~]# sudo yum installhttp://mirrors.yun-idc.com/epel/6/i386/epel-release-6-8.noarch.rpm

[email protected] ~]# sudo yum install Docker-io

[[Email protected] ~]# service Docker start

[[email protected] ~]# Chkconfig Docker on

[email protected] ~]# Yum install git-y

2.kernel version too low,Upgrading the Kernel

[email protected] ~]# Docker pulldaocloud.io/library/nginx:1.9.9//pull Mirror times wrong Let's do docker-d

Cannot connect to the Docker daemon. Is ' docker-d ' running on this host?

[Email protected] ~]# docker-d

warn[0000] Running Linux kernel version2.6.32-431.el6.x86_64, which might be unstable running Docker.               Upgradeyour kernel to 3.10.0. Tip Kernel version number is too low

INFO[0000] Listening for HTTP on Unix (/var/run/docker.sock)

3.Upgrading the Kernel

RPM-IVH http://www.elrepo.org/elrepo-release-6-5.el6.elrepo.noarch.rpm

Yum--enablerepo=elrepo-kernelinstallkernel-ml-y

4. EditGrub.conffiles, modifyingGrubBoot order

Vim/etc/grub.conf

# grub.conf generated by Anaconda

#

# Note that you don't have the to rerun grub aftermaking changes to the This file

# notice:you does not have a/boot partition. This means

# all kernel and INITRD paths is relative to/, eg.

# root (hd0,0)

# kernel/boot/vmlinuz-version RO root=/dev/sda1

# initrd/boot/initrd-[generic-]version.img

#boot =/DEV/SDA

Default=0

Timeout=5

Splashimage= (hd0,0)/grub/splash.xpm.gz

Hiddenmenu

Title CentOS (4.4.0-1.el6.elrepo.x86_64)

Root (hd0,0)

kernel/vmlinuz-4.4.0-1.el6.elrepo.x86_64 ro Root=/dev/mapper/vg_gmdai-lv_rootrd_no_luks rd_LVM_LV=vg_gmdai/lv_ Swap Rd_no_md Rd_lvm_lv=vg_gmdai/lv_rootcrashkernel=auto. UTF-8 keyboardtype=pc keytable=us rd_no_dm rhgb quiet

Initrd/initramfs-4.4.0-1.el6.elrepo.x86_64.img

Title CentOS (2.6.32-431.el6.x86_64)

Root (hd0,0)

kernel/vmlinuz-2.6.32-431.el6.x86_64 roroot=/dev/mapper/vg_gmdai-lv_root Rd_no_luks Rd_LVM_LV=vg_gmdai/lv_swap rd_ No_mdrd_lvm_lv=vg_gmdai/lv_root Crashkernel=auto. UTF-8 keyboardtype=pc keytable=us rd_no_dm rhgbquiet

Initrd/initramfs-2.6.32-431.el6.x86_64.img

verify where the newly installed kernel is located,Then Setdefaultvalue(from0Start),generally the newly installed kernel is in the first position,so setdefault=0.

5, reboot, view kernel version number

[Email protected] ~]# uname-r

4.4.0-1.el6.elrepo.x86_64

This article is from the "Technology House private Space" blog, please be sure to keep this source http://chulinx.blog.51cto.com/4098114/1763053

Docker Installation and kernel upgrades