OpenStack Train版-4.安装placement放置服务

1. 创建数据库

[root@controller ~]# mysql -u root -proot
MariaDB [(none)]> CREATE DATABASE placement;

授予数据库权限
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)]> exit；
2. 创建placement用户
[root@controller ~]# openstack user create --domain default --password PLACEMENT_PASS placement
+---------------------+----------------------------------+
| Field | Value |
+---------------------+----------------------------------+
| domain_id | default |
| enabled | True |
| id | 0985d973136a463d88acd8d9de3ef65e |
| name | placement |
| options | {} |
| password_expires_at | None |
+---------------------+----------------------------------+

[root@controller ~]# openstack role add --project service --user placement admin
3. 创建placement服务实体
[root@controller ~]# openstack service create --name placement --description "Placement API" placement
+-------------+----------------------------------+
| Field | Value |
+-------------+----------------------------------+
| description | Placement API |
| enabled | True |
| id | 9ce7600f5b2b4b1e84c72530a7759845 |
| name | placement |
| type | placement |
+-------------+----------------------------------+
4. 创建placement服务访问端点
[root@controller ~]# openstack endpoint create --region RegionOne placement public http://controller:8778
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | c8aaff1cb2a643ffbef8db7e9eea74c1 |
| interface | public |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 9ce7600f5b2b4b1e84c72530a7759845 |
| service_name | placement |
| service_type | placement |
| url | http://controller:8778 |
+--------------+----------------------------------+
[root@controller ~]# openstack endpoint create --region RegionOne placement internal http://controller:8778
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | ea7d331296a346d09042ba8dff22e135 |
| interface | internal |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 9ce7600f5b2b4b1e84c72530a7759845 |
| service_name | placement |
| service_type | placement |
| url | http://controller:8778 |
+--------------+----------------------------------+

[root@controller ~]# openstack endpoint create --region RegionOne placement admin http://controller:8778
+--------------+----------------------------------+
| Field | Value |
+--------------+----------------------------------+
| enabled | True |
| id | e72da71692084241a09d7ec1e882fbd3 |
| interface | admin |
| region | RegionOne |
| region_id | RegionOne |
| service_id | 9ce7600f5b2b4b1e84c72530a7759845 |
| service_name | placement |
| service_type | placement |
| url | http://controller:8778 |
+--------------+----------------------------------+
5. 安装placement软件包
yum install openstack-placement-api -y

6. 修改配置文件
[root@controller ~]# cp /etc/placement/placement.conf /etc/placement/placement.conf.bak
[root@controller ~]# grep -Ev '^$|#' /etc/placement/placement.conf.bak > /etc/placement/placement.conf
[root@controller ~]# openstack-config --set /etc/placement/placement.conf placement_database connection mysql+pymysql://placement:PLACEMENT_DBPASS@controller/placement

[root@controller ~]# vim /etc/placement/placement.conf
[api]
# ...
auth_strategy = keystone

[keystone_authtoken]
# ...
auth_url = http://controller:5000/v3
memcached_servers = controller:11211
auth_type = password
project_domain_name = Default
user_domain_name = Default
project_name = service
username = placement
password = PLACEMENT_PASS

填充placement数据库
[root@controller ~]# su -s /bin/sh -c "placement-manage db sync" placement

修改placement的apache配置文件（官方文档坑点之一，这个步骤官方文档没有提到，如果不做，后面计算服务检查时将会报错）
[root@controller ~]# vim /etc/httpd/conf.d/00-placement-api.conf
.....
<Directory /usr/bin>
<IfVersion >= 2.4>
Require all granted
</IfVersion>
<IfVersion < 2.4>
Order allow,deny
Allow from all
</IfVersion>
</Directory>
.....

7. 重启apache服务
[root@controller ~]# systemctl restart httpd

检查服务是否启动成功，使用netstat -tnlup查看端口情况，如果存在8778的端口，表示placement服务启动成功。
[root@controller ~]# lsof -i:8778
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
httpd 11116 root 6u IPv6 53596 0t0 TCP *:8778 (LISTEN)
httpd 11125 apache 6u IPv6 53596 0t0 TCP *:8778 (LISTEN)
httpd 11126 apache 6u IPv6 53596 0t0 TCP *:8778 (LISTEN)
httpd 11127 apache 6u IPv6 53596 0t0 TCP *:8778 (LISTEN)
httpd 11128 apache 6u IPv6 53596 0t0 TCP *:8778 (LISTEN)
httpd 11129 apache 6u IPv6 53596 0t0 TCP *:8778 (LISTEN)

进一步检查，使用命令：curl http://controller:8778，直接访问placement的API地址，看是否能返回json。
[root@controller ~]# curl http://controller:8778
{"versions": [{"status": "CURRENT", "min_version": "1.0", "max_version": "1.36", "id": "v1.0", "links": [{"href": "", "rel": "self"}]}]}
8. 检查健康状态
[root@controller ~]# placement-status upgrade check