OpenStack中彻底删除计算节点

院长技术

发布于 2020-06-13 18:24:03

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发布于 2020-06-13 18:24:03

文章被收录于专栏：院长运维开发

上一节我们尝试了追加安装一台计算节点，这一节我们讲一讲，怎么彻底删除。下面记录了在openstack中彻底删除计算节点nova-node2.openstack的操作：在控制节点上操作查看计算节点：

[root@nova-node1 src]# openstack host list
Host Name	Service	Zone
nova-node1.openstack	conductor	internal
nova-node1.openstack	cert	internal
nova-node1.openstack	consoleauth	internal
nova-node1.openstack	scheduler	internal
nova-node1.openstack	compute	nova
nova-node2.openstack	compute	nova

[root@nova-node1 src]# nova service-list
Id	Binary	Host	Zone	Status	State	Updated_at	Disabled Reason
1	nova-conductor	nova-node1.openstack	internal	enabled	up	2016-11-02T11:25:08.000000	-
4	nova-cert	nova-node1.openstack	internal	enabled	up	2016-11-02T11:25:07.000000	-
5	nova-consoleauth	nova-node1.openstack	internal	enabled	up	2016-11-02T11:25:07.000000	-
6	nova-scheduler	nova-node1.openstack	internal	enabled	up	2016-11-02T11:25:07.000000	-
7	nova-compute	nova-node1.openstack	nova	enabled	up	2016-11-02T11:24:59.000000	-
8	nova-compute	nova-node2.openstack	nova	enabled	down	2016-10-31T05:55:24.000000	-

虽然上面显示的一个计算节点nova-node2.openstack 的State状态是down，但是Status状态还是enabled可用。现在需要使它为不可用。

[root@nova-node1 src]# nova service-disable nova-node2.openstack nova-compute
Host	Binary	Status
nova-node2.openstack	nova-compute	disabled

[root@nova-node1 src]# nova service-list
Id	Binary	Host	Zone	Status	State	Updated_at	Disabled Reason
1	nova-conductor	nova-node1.openstack	internal	enabled	up	2016-11-02T11:25:48.000000	-
4	nova-cert	nova-node1.openstack	internal	enabled	up	2016-11-02T11:25:47.000000	-
5	nova-consoleauth	nova-node1.openstack	internal	enabled	up	2016-11-02T11:25:47.000000	-
6	nova-scheduler	nova-node1.openstack	internal	enabled	up	2016-11-02T11:25:47.000000	-
7	nova-compute	nova-node1.openstack	nova	enabled	up	2016-11-02T11:25:49.000000	-
8	nova-compute	nova-node2.openstack	nova	disabled	down	2016-11-02T11:25:48.000000	-

在数据库里清理（nova库） [root@nova-node1 ~]# mysql -p Enter password: Welcome to the MariaDB monitor. Commands end with ; or g. Your MariaDB connection id is 230863 Server version: 5.5.50-MariaDB MariaDB Server

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

MariaDB [(none)]> use nova; Database changed MariaDB [nova]> delete from nova.services where host="nova-node2.openstack"; Query OK, 1 row affected (0.00 sec) MariaDB [nova]> delete from compute_nodes where hypervisor_hostname="nova-node2.openstack"; Query OK, 1 row affected (0.00 sec)

MariaDB [nova]> select host from nova.services;
host
nova-node1.openstack
nova-node1.openstack
nova-node1.openstack
nova-node1.openstack
nova-node1.openstack

5 rows in set (0.00 sec)

MariaDB [nova]> select hypervisor_hostname from compute_nodes;
hypervisor_hostname
nova-node1.openstack

1 row in set (0.00 sec)

再次查看计算节点，就发现已经删除了nova-node2.openstack

[root@nova-node1 src]# openstack host list
Host Name	Service	Zone
nova-node1.openstack	conductor	internal
nova-node1.openstack	cert	internal
nova-node1.openstack	consoleauth	internal
nova-node1.openstack	scheduler	internal
nova-node1.openstack	compute	nova

[root@nova-node1 src]# nova service-list
Id	Binary	Host	Zone	Status	State	Updated_at	Disabled Reason
1	nova-conductor	nova-node1.openstack	internal	enabled	up	2016-11-02T11:44:08.000000	-
4	nova-cert	nova-node1.openstack	internal	enabled	up	2016-11-02T11:44:08.000000	-
5	nova-consoleauth	nova-node1.openstack	internal	enabled	up	2016-11-02T11:44:07.000000	-
6	nova-scheduler	nova-node1.openstack	internal	enabled	up	2016-11-02T11:44:07.000000	-
7	nova-compute	nova-node1.openstack	nova	enabled	up	2016-11-02T11:44:09.000000	-