openshift 容器云从入门到崩溃之二《准备环境》

openshift 从3.9开始就开始支持系统组件在容器里运行了，之前版本都是直接运行在操作系统上，名字也改了叫OKD

目前最新的稳定版本是3.11，所以就安装3.11版本

准备环境：

主机名	系统	建议最小配置	角色
m1.example.com	centos7	4核16G	master
m2.example.com	centos7	4核16G	master
m3.example.com	centos7	4核16G	master
n1.example.com	centos7	4核8G	node
n2.example.com	centos7	4核8G	node
n3.example.com	centos7	4核8G	node

准备基础环境

1、打通m1到所有节点的ssh免登陆

# ssh-keygen
# for host in m1.example.com \
    m1.example.com \
    m2.example.com \
    m3.example.com \
    n1.example.com \
    n2.example.com \
    n3.example.com; \
    do ssh-copy-id -i ~/.ssh/id_rsa.pub $host; \
    done

2、安装依赖

# yum install -y wget git net-tools bind-utils yum-utils iptables-services bridge-utils bash-completion kexec-tools sos psacct
# yum update
# reboot
# yum install docker-1.13.1

3、配置docker存储

额外挂载一块硬盘，作为docker的存储

# vim /etc/sysconfig/docker-storage-setup
DEVS=/dev/vdb
VG=docker-vg
SETUP_LVM_THIN_POOL=yes
AUTO_EXTEND_POOL=yes
DATA_SIZE=%FREE
DOCKER_ROOT_VOLUME_SIZE=%FREE

# vim /etc/sysconfig/docker-storage
DOCKER_STORAGE_OPTIONS="--storage-driver devicemapper --storage-opt dm.fs=xfs --storage-opt dm.thinpooldev=/dev/mapper/docker--vg-docker--pool --storage-opt dm.use_deferred_removal=true"

初始化docker存储

# docker-storage-setup

2、配置ansible

yum -y ansible

下载openshift ansible文件

# git clone https://github.com/openshift/openshift-ansible
# cd openshift-ansible/
# git checkout release-3.11