OpenStack T版—Placement组件部署

一、OpenStack—Placement组件部署

1.1、创建数据库实例和数据库用户

[root@ct ~]# mysql -uroot -p123456
MariaDB [(none)]> CREATE DATABASE placement;
MariaDB [(none)]>  GRANT ALL PRIVILEGES ON placement.* TO 'placement'@'localhost' IDENTIFIED BY 'PLACEMENT_DBPASS';
MariaDB [(none)]> GRANT ALL PRIVILEGES ON placement.* TO 'placement'@'%' IDENTIFIED BY 'PLACEMENT_DBPASS';
MariaDB [(none)]> flush privileges;
MariaDB [(none)]> exit

1.2、创建Placement服务用户和API的endpoint

[root@ct ~]# openstack user create --domain default --password PLACEMENT_PASS placement
#创建placement用户
[root@ct ~]# openstack role add --project service --user placement admin
#给与placement用户对service项目拥有admin权限
[root@ct ~]# openstack service create --name placement --description "Placement API" placement
#创建一个placement服务，服务类型为placement

1.2.1、注册API端口到placement的service中；注册的信息会写入到mysql中

[root@ct ~]# openstack endpoint create --region RegionOne placement public http://ct:8778
[root@ct ~]#  openstack endpoint create --region RegionOne placement internal http://ct:8778
[root@ct ~]# openstack endpoint create --region RegionOne placement admin http://ct:8778

1.3、安装placement服务

[root@ct ~]# yum -y install openstack-placement-api

1.4、修改placement配置文件

[root@ct ~]# cp /etc/placement/placement.conf{
    
    ,.bak}
[root@ct ~]# grep -Ev '^$|#' /etc/placement/placement.conf.bak > /etc/placement/placement.conf
[root@ct ~]# openstack-config --set /etc/placement/placement.conf placement_database connection mysql+pymysql://placement:PLACEMENT_DBPASS@ct/placement
[root@ct ~]# openstack-config --set /etc/placement/placement.conf api auth_strategy keystone
[root@ct ~]# openstack-config --set /etc/placement/placement.conf keystone_authtoken auth_url  http://ct:5000/v3
[root@ct ~]# openstack-config --set /etc/placement/placement.conf keystone_authtoken memcached_servers ct:11211
[root@ct ~]# openstack-config --set /etc/placement/placement.conf keystone_authtoken auth_type password
[root@ct ~]# openstack-config --set /etc/placement/placement.conf keystone_authtoken project_domain_name Default
[root@ct ~]# openstack-config --set /etc/placement/placement.conf keystone_authtoken user_domain_name Default
[root@ct ~]# openstack-config --set /etc/placement/placement.conf keystone_authtoken project_name service
[root@ct ~]# openstack-config --set /etc/placement/placement.conf keystone_authtoken username placement
[root@ct ~]# openstack-config --set /etc/placement/placement.conf keystone_authtoken password PLACEMENT_PASS
[root@ct ~]# cd /etc/placement
[root@ct placement]# cat placement.conf          #查看placement配置文件
[DEFAULT]
[api]
auth_strategy = keystone
[cors]
[keystone_authtoken]
auth_url = http://ct:5000/v3				#指定keystone地址
memcached_servers = ct:11211			#session信息是缓存放到了memcached中
auth_type = password
project_domain_name = Default
user_domain_name = Default
project_name = service
username = placement
password = PLACEMENT_PASS
[oslo_policy]
[placement]
[placement_database]
connection = mysql+pymysql://placement:PLACEMENT_DBPASS@ct/placement
[profiler]

[root@ct ~]# su -s /bin/sh -c "placement-manage db sync" placement     #导入数据库
[root@ct ~]# cd /etc/httpd/conf.d/
[root@ct conf.d]# cat 00-placement-api.conf 		#安装完placement会自动创建此文件
[root@ct conf.d]# vim 00-placement-api.conf   #修改Apache配置文件
Listen 8778

<VirtualHost *:8778>
  WSGIProcessGroup placement-api
  WSGIApplicationGroup %{
    
    GLOBAL}
  WSGIPassAuthorization On
  WSGIDaemonProcess placement-api processes=3 threads=1 user=placement group=placement
  WSGIScriptAlias / /usr/bin/placement-api
  <IfVersion >= 2.4>
    ErrorLogFormat "%M"
  </IfVersion>
  ErrorLog /var/log/placement/placement-api.log
  #SSLEngine On
  #SSLCertificateFile ...
  #SSLCertificateKeyFile ...
</VirtualHost>

Alias /placement-api /usr/bin/placement-api
<Location /placement-api>
  SetHandler wsgi-script
  Options +ExecCGI
  WSGIProcessGroup placement-api
  WSGIApplicationGroup %{
    
    GLOBAL}
  WSGIPassAuthorization On
</Location>
<Directory /usr/bin>			#此处是bug，必须添加下面的配置来启用对placement api的访问，否则在访问apache的
<IfVersion >= 2.4>				#api时会报403；添加在文件的最后即可
	Require all granted
</IfVersion>
<IfVersion < 2.4>				#apache版本；允许apache访问/usr/bin目录；否则/usr/bin/placement-api将不允许被访问
	Order allow,deny				
	Allow from all			#允许apache访问
</IfVersion>
</Directory>

[root@ct ~]# systemctl restart httpd   #重新启动apache

1.5、 测试

1.5.1、curl 测试访问

[root@ct ~]# curl ct:8778

1.5.2、查看端口占用（netstat、lsof）

[root@ct ~]# netstat -natp | grep 8778

1.5.3、检查placement状态

[root@ct ~]# placement-status upgrade check

2、小结

Placement提供了placement-apiWSGI脚本，用于与Apache，nginx或其他支持WSGI的Web服务器一起运行服务(通过nginx或apache实现python入口代理)。
根据用于部署OpenStack的打包解决方案，WSGI脚本可能位于/usr/bin 或中/usr/local/bin
Placement服务是从 S 版本，从nova服务中拆分出来的组件，作用是收集各个node节点的可用资源，把node节点的资源统计写入到mysql,Placement服务会被nova scheduler服务进行调用 Placement服务的监听端口是8778

■ 需修改的配置文件：
■ placement.conf
主要修改思路：
Keystone认证相关（url、HOST:PORT、域、账号密码等）
对接数据库（位置）
■ 00-placement-api.conf
主要修改思路：
Apache权限、访问控制