docker 安装要求内核大于3.10 ， 而centos6 机器上内核一般是2.6 ， 除了升级内核外， 还可以安装低版本的docker ， 本文介绍docker 1.7的安装。
机器 环境
[root@node202 docker]# uname -a Linux node202.hmbank.com 2.6.32-573.el6.x86_64 #1 SMP Wed Jul 1 18:23:37 EDT 2015 x86_64 x86_64 x86_64 GNU/Linux [root@node202 docker]# cat /etc/system-release Red Hat Enterprise Linux Server release 6.7 (Santiago)
添加epel源
rpm -iUvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
安装
yum -y install docker-io
======================================================================================================================================================================================= Package Arch Version Repository Size ======================================================================================================================================================================================= Installing: docker-io x86_64 1.7.1-2.el6 epel 4.6 M Installing for dependencies: libcgroup x86_64 0.40.rc1-26.el6 base 131 k lua-alt-getopt noarch 0.7.0-1.el6 epel 6.9 k lua-filesystem x86_64 1.4.2-1.el6 epel 24 k lua-lxc x86_64 1.0.11-1.el6 epel 16 k lxc x86_64 1.0.11-1.el6 epel 124 k lxc-libs x86_64 1.0.11-1.el6 epel 257 k Transaction Summary ======================================================================================================================================================================================= Install 7 Package(s)
报错1
Warning: '-bip' is deprecated, it will be replaced by '--bip' soon. See usage. INFO[0000] Listening for HTTP on unix (/var/run/docker.sock) WARN[0000] You are running linux kernel version 2.6.32-573.el6.x86_64, which might be unstable running docker. Please upgrade your kernel to 3.10.0. INFO[0000] [graphdriver] using prior storage driver "devicemapper" WARN[0000] Running modprobe bridge nf_nat failed with message: install /bin/true install /sbin/modprobe --ignore-install bridge && /sbin/sysctl -q -w net.bridge.bridge-nf-call-arptables=0 net.bridge.bridge-nf-call-iptables=0 net.bridge.bridge-nf-call-ip6tables=0 install /bin/true insmod /lib/modules/2.6.32-573.el6.x86_64/kernel/net/bridge/bridge.ko , error: exit status 1 FATA[0000] Error starting daemon: Error initializing network controller: Error creating default "bridge" network: package not installed
modprobe bridge 报错：
centos无法将安装bridge内核模块。
报错2
# 启动docker服务
root@node202 ~]# docker -d INFO[0000] Listening for HTTP on unix (/var/run/docker.sock) WARN[0000] You are running linux kernel version 2.6.32-573.el6.x86_64, which might be unstable running docker. Please upgrade your kernel to 3.10.0. WARN[0009] Running modprobe bridge nf_nat failed with message: insmod /lib/modules/2.6.32-573.el6.x86_64/kernel/net/llc/llc.ko insmod /lib/modules/2.6.32-573.el6.x86_64/kernel/net/802/stp.ko install /sbin/modprobe --ignore-install bridge && /sbin/sysctl -q -w net.bridge.bridge-nf-call-arptables=0 net.bridge.bridge-nf-call-iptables=0 net.bridge.bridge-nf-call-ip6tables=0 insmod /lib/modules/2.6.32-573.el6.x86_64/kernel/net/bridge/bridge.ko insmod /lib/modules/2.6.32-573.el6.x86_64/kernel/net/ipv4/netfilter/nf_defrag_ipv4.ko insmod /lib/modules/2.6.32-573.el6.x86_64/kernel/net/netfilter/nf_conntrack.ko insmod /lib/modules/2.6.32-573.el6.x86_64/kernel/net/ipv4/netfilter/nf_conntrack_ipv4.ko insmod /lib/modules/2.6.32-573.el6.x86_64/kernel/net/ipv4/netfilter/nf_nat.ko , error: exit status 1 WARN[0010] Your kernel does not support cgroup memory limit: mountpoint for memory not found WARN[0010] mountpoint for cpu not found FATA[0010] Error mounting devices cgroup: mountpoint for devices not found
原因： cgroup 在宿主机上没有挂载 。
修改 /etc/fstab
在结尾加上 none /sys/fs/cgroup cgroup defaults 0 0
reboot服务器 。 解决。
配置从私有仓库拉取镜像
- 修改 /etc/sysconfig/docker
最后一行添加：
DOCKER_OPTS="--insecure-registry node205:5000"
- 修改 /etc/init.d/docker
为exec添加上述运行参数 ：
$exec -d $other_args $DOCKER_OPTS &>> $logfile &
- 重启 service docker restart