CentOS7安装OpenStack-01.系统环境准备和相关组件安装

官方文档：https://docs.openstack.org

1.0.系统环境

生产测试应用的服务器最好是物理机，虚拟目前可以完成搭建测试体验
系统选择是目前的最新版本：CentOS Linux release 7.7.1908 (Core)
控制节点：Controller ：192.168.182.143
计算节点：Nova：192.168.182.142

1.1.配置域名解析

1）配置主机名

# 在控制节点上执行
hostnamectl set-hostname controller
echo '
# controller
192.168.182.143       controller
# compute1
192.168.182.142       compute1
'>>/etc/hosts

1.2.关闭防火墙和selinux

systemctl stop firewalld.service
systemctl disable firewalld.service
systemctl status firewalld.service

setenforce 0
getenforce
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/sysconfig/selinux
grep SELINUX=disabled /etc/sysconfig/selinux

1.3.配置时间同步

1）在控制端配置时间同步服务

# 在所有的节点上执行 
yum install chrony -y

2）编辑配置文件确认有以下配置

vim /etc/chrony.conf
# 在控制节点上配置
# 去掉原有的server
server  ntp6.aliyun.com iburst
allow 192.168.182.0/24

3）重启ntp服务，并配置开机自启动

systemctl restart chronyd.service
systemctl status chronyd.service
systemctl enable chronyd.service
systemctl list-unit-files |grep chronyd.service

4）设置时区，同步时间

timedatectl set-timezone Asia/Shanghai
chronyc sources
timedatectl status

1.4.配置相关yum源

1）配置阿里云的base和epel源

mv -f /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

mv /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel.repo.backup
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo

2）安装openstack-rocky的仓库

yum install centos-release-openstack-rocky -y
yum clean all
yum makecache

# 也可以手动创建OpenStack的阿里云yum源地址

echo '[centos-openstack-rocky]
name=CentOS-7 - OpenStack rocky
baseurl=http://mirrors.aliyun.com/centos/7/cloud/$basearch/openstack-rocky/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-Cloud

[centos-openstack-rocky-test]
name=CentOS-7 - OpenStack rocky Testing
baseurl=http://mirrors.aliyun.com/centos/7/cloud/$basearch/openstack-rocky/
gpgcheck=0
enabled=0

[centos-openstack-rocky-debuginfo]
name=CentOS-7 - OpenStack rocky - Debug
baseurl=http://mirrors.aliyun.com/centos/7/cloud/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-Cloud

[centos-openstack-rocky-source]
name=CentOS-7 - OpenStack rocky - Source
baseurl=http://mirrors.aliyun.com/centos/7/cloud/$basearch/openstack-rocky/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-Cloud

[rdo-trunk-rocky-tested]
name=OpenStack rocky Trunk Tested
baseurl=http://mirrors.aliyun.com/centos/7/cloud/$basearch/rdo-trunk-rocky-tested/
gpgcheck=0
enabled=0'>/etc/yum.repos.d/CentOS-OpenStack-Rocky.repo

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3）更新软件包

yum update -y

4）安装openstack客户端相关软件

yum install python-openstackclient openstack-selinux -y

1.5.在控制节点安装数据库

1）安装mariadb相关软件包

yum install mariadb mariadb-server MySQL-python python2-PyMySQL -y

2）创建openstack的数据库配置文件

vim /etc/my.cnf.d/mariadb-server.cnf
# 在[mysqld]添加以下配置
# -----------------------------------
[mysqld]
bind-address = 0.0.0.0
default-storage-engine = innodb
innodb_file_per_table = on
max_connections = 4096
collation-server = utf8_general_ci
character-set-server = utf8
init-connect = 'SET NAMES utf8'
# -----------------------------------

3）启动数据库设置开机启动

systemctl restart mariadb.service
systemctl status mariadb.service 

systemctl enable mariadb.service 
systemctl list-unit-files |grep mariadb.service

4）初始化数据库并重新启动

# 最后安全初始化，运行``mysql_secure_installation``脚本
mysql_secure_installation
步骤依次如下：
回车
n
Y
Y
Y
Y

# 重启服务
systemctl restart mariadb.service

1.6.在控制节点安装消息队列rabbitmq

1）安装rabbitmq-server

yum install rabbitmq-server -y

2）启动rabbitmq，并配置自启动

systemctl start rabbitmq-server.service
systemctl status rabbitmq-server.service

systemctl enable rabbitmq-server.service
systemctl list-unit-files |grep rabbitmq-server.service

3）创建消息队列中openstack账号及密码

# 添加openstack用户和密码，配置用户权限，配置读，写权限

rabbitmqctl add_user openstack openstack
rabbitmqctl set_permissions openstack ".*" ".*" ".*"
rabbitmqctl set_permissions -p "/" openstack ".*" ".*" ".*"

# 启用web管理插件，需要重启服务使之生效

rabbitmq-plugins enable rabbitmq_management
systemctl restart rabbitmq-server.service
rabbitmq-plugins list
lsof -i:15672

# web访问：http://192.168.182.143:15672

1.7.在控制节点上安装Memcached

# 认证服务认证缓存使用Memcached缓存令牌。缓存服务memecached运行在控制节点。在生产部署中，推荐联合启用防火墙、认证和加密保证它的安全。

1）安装Memcached用于缓存令牌

yum install memcached python-memcached -y

2）修改memcached配置文件

# 修改配置，改成本机的IP地址，为了外部能访问
sed -i 's#127.0.0.1#192.168.182.143#g' /etc/sysconfig/memcached

3）启动memcached并设置开机自启动

systemctl start memcached.service
systemctl status memcached.service
netstat -anptl|grep memcached

systemctl enable memcached.service
systemctl list-unit-files |grep memcached.service

1.8.在控制节点上安装Etcd服务

# 这个Etcd服务是新加入的，用于自动化配置

1）安装etcd服务

yum install etcd -y

2）修改etcd配置文件

vim /etc/etcd/etcd.conf
-----------------------------------
#[Member]
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="http://192.168.182.143:2380"
ETCD_LISTEN_CLIENT_URLS="http://192.168.182.143:2379"
ETCD_NAME="controller"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.182.143:2380"
ETCD_ADVERTISE_CLIENT_URLS="http://192.168.182.143:2379"
ETCD_INITIAL_CLUSTER="controller=http://192.168.182.143:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster-01"
ETCD_INITIAL_CLUSTER_STATE="new"
------------------------------------

# 注意上面的IP地址不能用controller替代，无法解析

3）启动etcd并设置开机自启动

systemctl start etcd.service
systemctl status etcd.service
netstat -anptl|grep etcd

systemctl enable etcd.service
systemctl list-unit-files |grep etcd.service

~~~至此，控制节点controller就完成基础环境的配置，下面可以开始安装 openstack 的组件~~~