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  • 如何删除 OpenStack Nova 僵尸实例

    转自:http://www.vpsee.com/2011/11/how-to-delete-a-openstack-nova-zombie-instance/

    前天强制重启一台 OpenStack Nova 控制结点以后发现虚拟机消失,但是 euca-describe-instances 命令显示 instances 仍然是 running 的状态,使用 euca-terminate-instances 终止命令仍然无效,暂时把这样的 instance 称作"僵尸实例(zombie instance)":

    # virsh list
    Id Name State
    ----------------------------------
    # euca-describe-instances RESERVATION r-bkl83j20 bangcloud default INSTANCE i-0000001d ami-00000002 172.16.39.121 172.16.39.121 running vpsee (vpseecloud, node00) 0 2011-11-10T12:45:12Z nova aki-00000001 ami-00000000 RESERVATION r-j335q6ny bangcloud default INSTANCE i-0000001e ami-00000002 172.16.39.122 172.16.39.122 running vpsee (vpseecloud, node00) 0 2011-11-10T12:54:27Z nova aki-00000001 ami-00000000
    # euca-terminate-instances i-0000001d # euca-terminate-instances i-0000001e

     

    和 删除 OpenStack Nova Volume 时遇到的 error_deleting 问题 这篇文章提到的解决办法一样,直接操作数据库来删除这2条僵尸实例的记录。登录 mysql,使用 nova 数据库,找出要删除 instance 的 id,然后删除:

    # mysql -u root -p
    Enter password:
    mysql
    > use nova; mysql> select * from instances; mysql> delete from instances where id = '29'; ERROR 1451 (23000): Cannot delete or update a parent row: a foreign key constraint fails (`nova`.`virtual_interfaces`, CONSTRAINT `virtual_interfaces_ibfk_1` FOREIGN KEY (`instance_id`) REFERENCES `instances` (`id`))

    MySQL 删除 id 为 29 的 instance 时触发外键限制错误,简单的办法是暂时关闭外键检查,等删除后再打开:

     

    mysql> SET FOREIGN_KEY_CHECKS=0;
    Query OK, 0 rows affected (0.00 sec)
    
    mysql> delete from instances where id = '29';
    Query OK, 1 row affected (0.04 sec)
    
    mysql> delete from instances where id = '30';
    Query OK, 1 row affected (0.04 sec)
    
    mysql> SET FOREIGN_KEY_CHECKS=1;
    Query OK, 0 rows affected (0.00 sec)

     

    删除 instance 29 和 30后再用 euca-describe-instances 命令验证一下:

     

    # euca-describe-instances
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  • 原文地址:https://www.cnblogs.com/IvanChen/p/4489456.html
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