001-官网安装openstack之-安装前基础环境准备

0.安装常用软件包(根据个人习惯安装需要的软件包)

 [root@localhost ~]# yum -y install wget vim ntp net-tools tree openssh

1.配置域名解析

 1)修改主机名
 [root@localhost ~]# hostnamectl set-hostname controller
 2)配置域名解析，修改/etc/hosts文件，进行本地解析
 查看本机IP
 [root@controller ~]#ip add|sed -nr  's#^.*inet (.*)/24.*$#\1#gp'
 [root@controller ~]# echo "192.168.100.91 controller"  >> /etc/hosts

2.关闭防火墙,禁用selinux

 [root@controller ~]# systemctl  stop firewalld
 [root@controller ~]# systemctl  disable firewalld
 [root@controller ~]# setenforce 0               #临时关闭selinux
 [root@controller ~]# vim /etc/selinux/config   #修改selinux文件,永久关闭生效(重启生效)
 SELINUX=disabled
 或者直接使用sed命令修改
 [root@controller ~]#sed -i '/^SELINUX=.*/c SELINUX=disabled' /etc/selinux/config
 [root@controller ~]#sed -i 's/^SELINUXTYPE=.*/SELINUXTYPE=disabled/g' /etc/selinux/config
 [root@controller ~]#grep --color=auto '^SELINUX' /etc/selinux/config

3.配置时间同步

 1)控制节点安装时钟同步服务(ntp或chrony)
 同步时间的两种方式：
 一种是通过不网络时间，一种是自已搭建时钟服务器
 ---网络同步：
 [root@controller ~]#ntpdate ntp.aliyun.com
 ---本地搭建时钟服务器
 [root@controller ~]# yum install chrony -y
 2)修改配置文件
 [root@controller ~]# vim /etc/chrony.conf
 server ntp1.aliyun.com iburst
 server ntp2.aliyun.com iburst
 allow 192.168.100.0/24

 3)启动时钟服务,设置开机自启动，查看状态
 [root@controller ~]# systemctl  enable chronyd
 [root@controller ~]# systemctl  start chronyd
 [root@controller ~]# systemctl  status chronyd
 4)同步时间
 #设置时区
 [root@controller ~]# timedatectl set-timezone Asia/Shanghai
 #同步时间
 [root@controller ~]# chronyc sources
 5)检查是否同步
 查看
 [root@controller ~]# date
 [root@controller ~]# timedatectl status

4.yum源配置

 1)配置网络源（阿里云的base及epel源）
 下载Centos-Base源
 [root@controller ~]#mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
 [root@controller ~]#wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
 下载epel源：
 [root@controller ~]#mv /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel.repo.bak
 [root@controller ~]#wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
 安装openstack rocky版源
 [root@server ~]# yum -y  install centos-release-openstack-rocky
 2)配置本地yum源(已有相关的openstack包)
 [root@controller yum.repos.d]# pwd
 /etc/yum.repos.d
 [root@controller yum.repos.d]# mkdir /opt/yumbak
 [root@controller yum.repos.d]# mv * /opt/yumbak/
 [root@controller yum.repos.d]# ls
 [root@controller yum.repos.d]# vim server.repo
 [root@controller yum.repos.d]# cat server.repo
 [openstack]
 name=server
 baseurl=file:///yum
 enabled=1
 gpgcheck=0
 [root@controller yum.repos.d]# yum clean all
 [root@controller yum.repos.d]# yum makecache
 [root@controller yum.repos.d]# yum repolist

 3)更新软件包（yum源为网络方式时）
 #安装rocky仓库
 [root@controller ~]#yum install centos-release-openstack-rocky -y
 #清空缓存
 [root@controller ~]#yum clean all
 #建立yum缓存
 [root@controller ~]#yum makecache
 #查看仓库列表
 [root@controller ~]#yum repolist

5.安装openstack客户端相关软件

 [root@controller ~]#yum install python-openstackclient openstack-selinux -y
 ##更新升级软件包
 [root@controller ~]#yum update -y
 #安装完后重启系统
 [root@controller ~]#reboot

至此，openstack基础环境准备完毕