新增計算節點到 CELL 資料庫

1. 載入管理者環境變變數。

   [root@ip112 ~]# . admin.token
   

2. 確認資料庫中有計算主機。

   [root@ip112 ~]# openstack compute service list --service nova-compute
   +----+--------------+------------------------+------+---------+-------+----------------------------+
   | ID | Binary       | Host                   | Zone | Status  | State | Updated At                 |
   +----+--------------+------------------------+------+---------+-------+----------------------------+
   | 13 | nova-compute | ip112.csie.cyut.edu.tw | nova | enabled | up    | 2018-05-24T14:28:49.000000 |
   +----+--------------+------------------------+------+---------+-------+----------------------------+
   

3. 發理取得資料庫中的計算主機。

   [root@ip112 ~]# su -s /bin/sh -c "nova-manage cell_v2 discover_hosts --verbose" nova
   /usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py:332: 
   NotSupportedWarning: Configuration option(s) ['use_tpool'] not supported
     exception.NotSupportedWarning
   Found 2 cell mappings.
   Skipping cell0 since it does not contain hosts.
   Getting computes from cell 'cell1': 4b4e2923-ee89-4057-b7d1-473951f313c2
   Checking host mapping for compute host 'ip112.csie.cyut.edu.tw': 9784a642-7c16-473b-91ed-95ee3d066021
   Creating host mapping for compute host 'ip112.csie.cyut.edu.tw': 9784a642-7c16-473b-91ed-95ee3d066021
   Found 1 unmapped computes in cell: 4b4e2923-ee89-4057-b7d1-473951f313c2
   

4. 當新增計算節點時，必須再執行上一個動作，也可在 /etc/nova/nova.conf 的 scheduler 章節中設定自動發現週期。

   [root@ip112 ~]# egrep '^(\[scheduler|^discover)' /etc/nova/nova.conf
   [scheduler]
   discover_hosts_in_cells_interval = 300