OpenStack의 nova 서비스에서 compute node를 제거하는 command가 없음.
nova database에서 직접 제거해야 함
1. 서비스 확인
root@controller:~# nova service-list
+----+------------------+------------+----------+----------+-------+----------------------------+-----------------+
| Id | Binary | Host | Zone | Status | State | Updated_at | Disabled Reason |
+----+------------------+------------+----------+----------+-------+----------------------------+-----------------+
| 1 | nova-cert | controller | internal | enabled | up | 2015-09-03T00:59:23.000000 | - |
| 2 | nova-consoleauth | controller | internal | enabled | up | 2015-09-03T00:59:23.000000 | - |
| 3 | nova-scheduler | controller | internal | enabled | up | 2015-09-03T00:59:21.000000 | - |
| 4 | nova-conductor | controller | internal | enabled | up | 2015-09-03T00:59:15.000000 | - |
| 5 | nova-compute | compute1 | nova | enabled | up | 2015-09-03T00:59:22.000000 | - |
| 6 | nova-network | compute1 | internal | enabled | up | 2015-09-03T00:59:20.000000 | - |
| 7 | nova-network | compute2 | internal | enabled | up | 2015-09-03T00:59:23.000000 | - |
| 8 | nova-compute | compute2 | nova | enabled | up | 2015-09-03T00:59:15.000000 | - |
| 9 | nova-network | compute3 | internal | enabled | up | 2015-09-03T00:59:18.000000 | - |
| 10 | nova-compute | compute3 | nova | enabled | up | 2015-09-03T00:59:18.000000 | - |
| 11 | nova-network | compute4 | internal | enabled | down | 2015-09-02T08:45:55.000000 | - |
| 12 | nova-compute | compute4 | nova | enabled | up | 2015-09-03T00:59:17.000000 | None |
| 13 | nova-compute | compute5 | nova | disabled | up | 2015-09-03T00:58:56.000000 | - |
| 14 | nova-network | compute5 | internal | disabled | up | 2015-09-03T00:59:05.000000 | - |
+----+------------------+------------+----------+----------+-------+----------------------------+-----------------+
2. 서비스 disable
root@controller:~# nova service-disable compute5 nova-compute
root@controller:~# nova service-disable compute5 nova-network
3. Hypervisor 정보 확인
root@controller:~# nova hypervisor-list
+----+---------------------+
| ID | Hypervisor hostname |
+----+---------------------+
| 1 | compute1 |
| 2 | compute2 |
| 3 | compute3 |
| 4 | compute4 |
| 5 | compute5 |
+----+---------------------+
3. Database에서 정보 삭제
root@controller:~# mysql -u root -p
- compute_nodes, services 두 개 테이블이 Foreign Key로 연결되어 있어 순서대로 정보 삭제 해야 함
(1) compute_nodes 테이벌 정보 삭제
- Compute Node 정보 table
MariaDB [nova]> desc compute_nodes;
+----------------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------------------+--------------+------+-----+---------+----------------+
| created_at | datetime | YES | | NULL | |
| updated_at | datetime | YES | | NULL | |
| deleted_at | datetime | YES | | NULL | |
| id | int(11) | NO | PRI | NULL | auto_increment |
| service_id | int(11) | NO | MUL | NULL | |
| vcpus | int(11) | NO | | NULL | |
| memory_mb | int(11) | NO | | NULL | |
| local_gb | int(11) | NO | | NULL | |
| vcpus_used | int(11) | NO | | NULL | |
| memory_mb_used | int(11) | NO | | NULL | |
| local_gb_used | int(11) | NO | | NULL |
|
| hypervisor_type | mediumtext | NO | | NULL | |
| hypervisor_version | int(11) | NO | | NULL | |
| cpu_info | mediumtext | NO | | NULL | |
| disk_available_least | int(11) | YES | | NULL | |
| free_ram_mb | int(11) | YES | | NULL | |
| free_disk_gb | int(11) | YES | | NULL | |
| current_workload | int(11) | YES | | NULL | |
| running_vms | int(11) | YES | | NULL | |
| hypervisor_hostname | varchar(255) | YES | | NULL |
|
| deleted | int(11) | YES | | NULL | |
| host_ip | varchar(39) | YES | | NULL | |
| supported_instances | text | YES | | NULL | |
| pci_stats | text | YES | | NULL | |
| metrics | text | YES | | NULL | |
| extra_resources | text | YES | | NULL | |
| stats | text | YES | | NULL | |
| numa_topology | text | YES | | NULL | |
+----------------------+--------------+------+-----+---------+----------------+
MariaDB [nova]> select id,service_id,hypervisor_hostname from compute_nodes;
+----+------------+---------------------+
| id | service_id | hypervisor_hostname |
+----+------------+---------------------+
| 1 | 5 | compute1 |
| 2 | 8 | compute2 |
| 3 | 10 | compute3 |
| 4 | 12 | compute4 |
| 5 | 13 | compute5 |
+----+------------+---------------------+
- compute5의 정보 삭제
MariaDB [nova]> delete from compute_nodes where id=5;
Query OK, 1 row affected (0.00 sec)
(2) services 테이블 정보 삭제
- services 테이블 조회 및 삭제
MariaDB [nova]> select * from services;
+---------------------+---------------------+------------+----+------------+------------------+-------------+--------------+---------- +---------+-----------------+
| created_at | updated_at | deleted_at | id | host | binary | topic | report_count | disabled | deleted | disabled_reason |
+---------------------+---------------------+------------+----+------------+------------------+-------------+--------------+---------- +---------
| 2015-08-24 06:25:42 | 2015-09-03 00:58:56 | NULL | 13 | compute5 | nova-compute | compute | 84345 | 1 | 0 | NULL |
| 2015-08-24 06:26:23 | 2015-09-03 00:59:05 | NULL | 14 | compute5 | nova-network | network | 84344 | 1 | 0 | NULL |
+---------------------+---------------------+------------+----+------------+------------------+-------------+--------------+---------- +---------+-----------------+
14 rows in set (0.00 sec)
- services 테이블 삭제
MariaDB [nova]> delete from services where id=13;
Query OK, 1 row affected (0.00 sec)
MariaDB [nova]> delete from services where id=14;
Query OK, 1 row affected (0.00 sec)
4. 서비스 정보 및 hypervisor 정보 조회
root@controller:~# nova service-list
+----+------------------+------------+----------+----------+-------+----------------------------+-----------------+
| Id | Binary | Host | Zone | Status | State | Updated_at | Disabled Reason |
+----+------------------+------------+----------+----------+-------+----------------------------+-----------------+
| 1 | nova-cert | controller | internal | enabled | up | 2015-09-03T01:10:43.000000 | - |
| 2 | nova-consoleauth | controller | internal | enabled | up | 2015-09-03T01:10:43.000000 | - |
| 3 | nova-scheduler | controller | internal | enabled | up | 2015-09-03T01:10:41.000000 | - |
| 4 | nova-conductor | controller | internal | enabled | up | 2015-09-03T01:10:45.000000 | - |
| 5 | nova-compute | compute1 | nova | enabled | up | 2015-09-03T01:10:42.000000 | -
|
| 6 | nova-network | compute1 | internal | enabled | up | 2015-09-03T01:10:40.000000 | - |
| 7 | nova-network | compute2 | internal | enabled | up | 2015-09-03T01:10:43.000000 | - |
| 8 | nova-compute | compute2 | nova | enabled | up | 2015-09-03T01:10:45.000000 | - |
| 9 | nova-network | compute3 | internal | enabled | up | 2015-09-03T01:10:48.000000 | - |
| 10 | nova-compute | compute3 | nova | enabled | up | 2015-09-03T01:10:48.000000 | - |
| 11 | nova-network | compute4 | internal | disabled | up | 2015-09-03T01:10:40.000000 | - |
| 12 | nova-compute | compute4 | nova | disabled | up | 2015-09-03T01:10:47.000000 | - |
+----+------------------+------------+----------+----------+-------+----------------------------+-----------------+
root@controller:~#
root@controller:~# nova hypervisor-list
+----+---------------------+
| ID | Hypervisor hostname |
+----+---------------------+
| 1 | compute1 |
| 2 | compute2 |
| 3 | compute3 |
| 4 | compute4 |
+----+---------------------+
5. 해당 노드에서 nova 관련 서비스 제거
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