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  • openstack中彻底删除计算节点的操作记录

    在使用openstack的过程中,我们经常会添加好几台计算节点来部署虚拟机,在后续使用中由于某些原因,一些计算节点出现了问题,需要将这些出了问题的计算节点从openstack的控制节点中踢出去!但是很多时候,在删除计算节点的时候由于删除不彻底而导致了后面使用openstack出现了诸多问题。

    下面记录了在openstack中彻底删除计算节点linux-node2.openstack的操作:

    在控制节点上操作

    查看计算节点

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

    虽然上面显示的一个计算节点linux-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@linux-node1 src]# nova service-disable linux-node2.openstack nova-compute  
    +-----------------------+--------------+----------+
    | Host                  | Binary       | Status   |
    +-----------------------+--------------+----------+
    | linux-node2.openstack | nova-compute | disabled |
    +-----------------------+--------------+----------+
    [root@linux-node1 src]# nova service-list  
    +----+------------------+-----------------------+----------+----------+-------+----------------------------+-----------------+
    | Id | Binary           | Host                  | Zone     | Status   | State | Updated_at                 | Disabled Reason |
    +----+------------------+-----------------------+----------+----------+-------+----------------------------+-----------------+
    | 1  | nova-conductor   | linux-node1.openstack | internal | enabled  | up    | 2016-11-02T11:25:48.000000 | -               |
    | 4  | nova-cert        | linux-node1.openstack | internal | enabled  | up    | 2016-11-02T11:25:47.000000 | -               |
    | 5  | nova-consoleauth | linux-node1.openstack | internal | enabled  | up    | 2016-11-02T11:25:47.000000 | -               |
    | 6  | nova-scheduler   | linux-node1.openstack | internal | enabled  | up    | 2016-11-02T11:25:47.000000 | -               |
    | 7  | nova-compute     | linux-node1.openstack | nova     | enabled  | up    | 2016-11-02T11:25:49.000000 | -               |
    | 8  | nova-compute     | linux-node2.openstack | nova     | disabled | down  | 2016-11-02T11:25:48.000000 | -               |
    +----+------------------+-----------------------+----------+----------+-------+----------------------------+-----------------+
    

    在数据库里清理(nova库)

    [root@linux-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
    
    Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.
    
    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="linux-node2.openstack"; 
    Query OK, 1 row affected (0.00 sec)
    MariaDB [nova]> delete from compute_nodes where hypervisor_hostname="linux-node2.openstack";
    Query OK, 1 row affected (0.00 sec)
    MariaDB [nova]> select host from nova.services;
    +-----------------------+
    | host                  |
    +-----------------------+
    | linux-node1.openstack |
    | linux-node1.openstack |
    | linux-node1.openstack |
    | linux-node1.openstack |
    | linux-node1.openstack |
    +-----------------------+
    5 rows in set (0.00 sec)
    
    MariaDB [nova]> select hypervisor_hostname from compute_nodes;
    +-----------------------+
    | hypervisor_hostname   |
    +-----------------------+
    | linux-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linux-node2.openstack

    [root@linux-node1 src]# openstack host list
    +-----------------------+-------------+----------+
    | Host Name             | Service     | Zone     |
    +-----------------------+-------------+----------+
    | linux-node1.openstack | conductor   | internal |
    | linux-node1.openstack | cert        | internal |
    | linux-node1.openstack | consoleauth | internal |
    | linux-node1.openstack | scheduler   | internal |
    | linux-node1.openstack | compute     | nova     |
    +-----------------------+-------------+----------+
    [root@linux-node1 src]# nova service-list
    +----+------------------+-----------------------+----------+---------+-------+----------------------------+-----------------+
    | Id | Binary           | Host                  | Zone     | Status  | State | Updated_at                 | Disabled Reason |
    +----+------------------+-----------------------+----------+---------+-------+----------------------------+-----------------+
    | 1  | nova-conductor   | linux-node1.openstack | internal | enabled | up    | 2016-11-02T11:44:08.000000 | -               |
    | 4  | nova-cert        | linux-node1.openstack | internal | enabled | up    | 2016-11-02T11:44:08.000000 | -               |
    | 5  | nova-consoleauth | linux-node1.openstack | internal | enabled | up    | 2016-11-02T11:44:07.000000 | -               |
    | 6  | nova-scheduler   | linux-node1.openstack | internal | enabled | up    | 2016-11-02T11:44:07.000000 | -               |
    | 7  | nova-compute     | linux-node1.openstack | nova     | enabled | up    | 2016-11-02T11:44:09.000000 | -               |
    +----+------------------+-----------------------+----------+---------+-------+----------------------------+-----------------+
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  • 原文地址:https://www.cnblogs.com/kevingrace/p/6024251.html
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