OpenStack组件部署之Placement

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

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一、创建数据库实例和数据库用户

mysql -uroot -p
CREATE DATABASE placement;
GRANT ALL PRIVILEGES ON placement.* TO 'placement'@'localhost' IDENTIFIED BY 'PLACEMENT_DBPASS';
GRANT ALL PRIVILEGES ON placement.* TO 'placement'@'%' IDENTIFIED BY 'PLACEMENT_DBPASS';
flush privileges;
exit；

二、创建Placement服务用户和API的endpoint

创建placement用户

openstack user create --domain default --password PLACEMENT_PASS placement

给placement用户对service项目的admin权限

openstack role add --project service --user placement admin

创建一个placement服务，服务类型为placement

openstack service create --name placement --description "Placement API" placement

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

openstack endpoint create --region RegionOne placement public http://ct:8778
openstack endpoint create --region RegionOne placement internal http://ct:8778
openstack endpoint create --region RegionOne placement admin http://ct:8778

三、安装placement服务

yum -y install openstack-placement-api

修改placement配置文件

cp -a /etc/placement/placement.conf{
    
    ,.bak}
grep -Ev '^$|#' /etc/placement/placement.conf.bak > /etc/placement/placement.conf
openstack-config --set /etc/placement/placement.conf placement_database connection mysql+pymysql://placement:PLACEMENT_DBPASS@ct/placement
openstack-config --set /etc/placement/placement.conf api auth_strategy keystone
openstack-config --set /etc/placement/placement.conf keystone_authtoken auth_url  http://ct:5000/v3
openstack-config --set /etc/placement/placement.conf keystone_authtoken memcached_servers ct:11211
openstack-config --set /etc/placement/placement.conf keystone_authtoken auth_type password
openstack-config --set /etc/placement/placement.conf keystone_authtoken project_domain_name Default
openstack-config --set /etc/placement/placement.conf keystone_authtoken user_domain_name Default
openstack-config --set /etc/placement/placement.conf keystone_authtoken project_name service
openstack-config --set /etc/placement/placement.conf keystone_authtoken username placement
openstack-config --set /etc/placement/placement.conf keystone_authtoken password PLACEMENT_PASS

导入数据库

su -s /bin/sh -c "placement-manage db sync" placement

四、修改Apache配置文件

vim /etc/httpd/conf.d/00-placement-api.conf

##末行添加##
<Directory /usr/bin>
<IfVersion >= 2.4>
	Require all granted
</IfVersion>
<IfVersion < 2.4>
	Order allow,deny
	Allow from all
</IfVersion>
</Directory>

重新启动apache

systemctl restart httpd

五、测试

curl 测试访问

curl ct:8778

查看端口占用（netstat、lsof）

netstat -natp | grep 8778

检查placement状态

placement-status upgrade check