需求说明:
计算节点linux-node1.openstack：192.168.1.8  
计算节点linux-node2.openstack：192.168.1.17

这两个计算节点在同一个控制节点下（192.168.1.8既是控制节点，也是其中一个计算节点），现在需要将linux-node1.openstack上的虚拟机kvm-server005迁移到liunx-node2.openstack上。

一、openstack的虚拟机线下迁移（”冷迁移“，迁移前关闭虚拟机）

操作记录如下：

linux-node1.openstack上的操作：

1）查看虚拟机

[root@linux-node1 src]# source admin-openrc.sh 
[root@linux-node1 src]# nova list

+--------------------------------------+----------------------------+--------+------------+-------------+--------------------+

| ID                                   | Name                       | Status | Task State | Power State | Networks           |

+--------------------------------------+----------------------------+--------+------------+-------------+--------------------+

| b6a4738d-7e01--a09b-7008b612d126 | beta-new1                  | ACTIVE | -          | Running     | flat=192.168.1.151 |

| 9acdb28b-02c2-41bb-87c4-5f3a8fa008ab | dev-new-test1              | ACTIVE | -          | Running     | flat=192.168.1.150 |

| 30e5ba3e---9ba6-7523cf865b6f | fangfull-backup            | ACTIVE | -          | Running     | flat=192.168.1.152 |

| 3483d9f1-4015-48d9-9837-b67ca82dd54d | kvm-server005              | ACTIVE | -          | Running     | flat=192.168.1.154 |

| 5ec50ae5-a1f9--b509-cfeb5ef62ca3 | memcache1-backup           | ACTIVE | -          | Running     | flat=192.168.1.155 |

| a5863e46-ef75--a9df-505da5db58ed | memcache2-backup           | ACTIVE | -          | Running     | flat=192.168.1.156 |

| 377c536e-4d27--8d9d-24c2686a73f6 | memcache3-backup           | ACTIVE | -          | Running     | flat=192.168.1.103 |

| a2893208-3ec9--ab82-d7a870206cb9 | xqsj-backup                | ACTIVE | -          | Running     | flat=192.168.1.153 |

+--------------------------------------+----------------------------+--------+------------+-------------+--------------------+

2）停止待迁移虚拟机kvm-server005

[root@linux-node1 src]# nova stop 3483d9f1-4015-48d9-9837-b67ca82dd54d

Request to stop server 3483d9f1-4015-48d9-9837-b67ca82dd54d has been accepted.

[root@linux-node1 src]# nova list

+--------------------------------------+----------------------------+--------+--------------+-------------+--------------------+

| ID                                   | Name                       | Status | Task State   | Power State | Networks           |

+--------------------------------------+----------------------------+--------+--------------+-------------+--------------------+

| b6a4738d-7e01-4068-a09b-7008b612d126 | beta-new1                  | ACTIVE | -            | Running     | flat=192.168.1.151 |

| 9acdb28b-02c2-41bb-87c4-5f3a8fa008ab | dev-new-test1              | ACTIVE | -            | Running     | flat=192.168.1.150 |

| 30e5ba3e-3942-4119-9ba6-7523cf865b6f | fangfull-backup            | ACTIVE | -            | Running     | flat=192.168.1.152 |

| 3483d9f1-4015-48d9-9837-b67ca82dd54d | kvm-server005              | SHUTOFF| -            | Shutdown    | flat=192.168.1.154 |

| 5ec50ae5-a1f9-4425-b509-cfeb5ef62ca3 | memcache1-backup           | ACTIVE | -            | Running     | flat=192.168.1.155 |

| a5863e46-ef75-4601-a9df-505da5db58ed | memcache2-backup           | ACTIVE | -            | Running     | flat=192.168.1.156 |

| 377c536e-4d27-4447-8d9d-24c2686a73f6 | memcache3-backup           | ACTIVE | -            | Running     | flat=192.168.1.103 |

| a2893208-3ec9-4606-ab82-d7a870206cb9 | xqsj-backup                | ACTIVE | -            | Running     | flat=192.168.1.153 |

+--------------------------------------+----------------------------+--------+--------------+-------------+--------------------+

3）查看待迁虚拟机kvm-server005所在的宿主机

[root@linux-node1 src]# nova show 3483d9f1-4015-48d9-9837-b67ca82dd54d | grep 'OS-EXT-SRV-ATTR:hos'

| OS-EXT-SRV-ATTR:host                 | linux-node1.openstack

4）登录宿主机linux-node1.openstack上,将虚拟机kvm-server005虚拟机的数据拷贝到待迁移的宿主机linux-node2.openstack上

[root@linux-node1 src]# cd /var/lib/nova/instances

[root@linux-node1 instances]# ls

30e5ba3e-3942-4119-9ba6-7523cf865b6f  5ec50ae5-a1f9-4425-b509-cfeb5ef62ca3  a5863e46-ef75-4601-a9df-505da5db58ed  compute_nodes

3483d9f1-4015-48d9-9837-b67ca82dd54d  9acdb28b-02c2-41bb-87c4-5f3a8fa008ab  b6a4738d-7e01-4068-a09b-7008b612d126  locks

377c536e-4d27-4447-8d9d-24c2686a73f6  a2893208-3ec9-4606-ab82-d7a870206cb9  _base                                 snapshots

[root@linux-node1 instances]# rsync -e "ssh -p22" -avpgolr 3483d9f1-4015-48d9-9837-b67ca82dd54d 192.168.1.17:/var/lib/nova/instances/

sending incremental file list

3483d9f1-4015-48d9-9837-b67ca82dd54d/

3483d9f1-4015-48d9-9837-b67ca82dd54d/console.log

3483d9f1-4015-48d9-9837-b67ca82dd54d/disk

3483d9f1-4015-48d9-9837-b67ca82dd54d/disk.info

3483d9f1-4015-48d9-9837-b67ca82dd54d/disk.swap

3483d9f1-4015-48d9-9837-b67ca82dd54d/libvirt.xml

sent 381469737 bytes  received 111 bytes  69358154.18 bytes/sec

total size is 381422781  speedup is 1.00

目标节点linux-node2.openstack上的操作

1）查看虚拟机kvm-server005的数据有没有拷贝过来，修改权限

[root@linux-node2 instances]# pwd

/var/lib/nova/instances

[root@linux-node2 instances]# ll

total 12

drwxr-xr-x. 2 nova nova   85 Oct 31 14:54 0944254c-1c75-4523-9751-2389d677d59c

drwxr-xr-x. 2 nova nova   85 Sep  6 12:59 3483d9f1-4015-48d9-9837-b67ca82dd54d

drwxr-xr-x. 2 nova nova   85 Oct 31 17:29 946b340a-28bc-492d-8b3a-59d2fea1b464

drwxr-xr-x. 2 nova nova 4096 Oct 31 17:17 _base

-rw-r--r--. 1 nova nova   44 Nov  1 10:53 compute_nodes

drwxr-xr-x. 2 nova nova   85 Oct 31 17:23 f6be1cb3-a694-4492-b2db-55ff9f09d843

drwxr-xr-x. 2 nova nova 4096 Oct 31 17:14 locks

[root@linux-node2 instances]# chown -R nova.nova 3483d9f1-4015-48d9-9837-b67ca82dd54d/

[root@linux-node2 instances]# ll 3483d9f1-4015-48d9-9837-b67ca82dd54d/

total 372492

-rw-rw----. 1 nova nova     65214 Sep  8 13:58 console.log

-rw-r--r--. 1 nova nova 381157376 Nov  1 10:59 disk

-rw-r--r--. 1 nova nova       162 Sep  6 12:59 disk.info

-rw-r--r--. 1 nova nova    197120 Sep  6 12:59 disk.swap

-rw-r--r--. 1 nova nova      2909 Sep  6 12:59 libvirt.xml

2）登录数据库更改MySQL中的host、node字段为新的物理主机名字

[root@linux-node2 instances]# mysql -p

Enter password:

Welcome to the MariaDB monitor.  Commands end with ; or \g.

Your MariaDB connection id is 4063

Server version: 10.1.17-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]> update instances set host='linux-node2.openstack', node='linux-node2.openstack' where uuid='3483d9f1-4015-48d9-9837-b67ca82dd54d';

Query OK, 1 rows affected (0.01 sec)

Rows matched: 1  Changed: 1  Warnings: 0

MariaDB [nova]>

3）在目标节点linux-node2.openstack上启动虚拟机，启动前重启一下该计算节点的compute服务

[root@linux-node2 instances]# systemctl restart  openstack-nova-compute

[root@linux-node2 instances]# nova start 3483d9f1-4015-48d9-9837-b67ca82dd54d

4）验证虚拟机所在的宿主机

[root@linux-node2 src]# nova list

+--------------------------------------+--------------+--------+------------+-------------+--------------------+

| ID                                   | Name         | Status | Task State | Power State | Networks           |

+--------------------------------------+--------------+--------+------------+-------------+--------------------+

| 946b340a-28bc-492d-8b3a-59d2fea1b464 | centos03     | ACTIVE | -          | Running     | flat=192.168.1.104 |

| 0944254c-1c75-4523-9751-2389d677d59c | kvm-centos01 | ACTIVE | -          | Running     | flat=192.168.1.121 |

| f6be1cb3-a694-4492-b2db-55ff9f09d843 | kvm-centos02 | ACTIVE | -          | Running     | flat=192.168.1.122 |

| 3483d9f1-4015-48d9-9837-b67ca82dd54d | kvm-server005| ACTIVE | -          | Running     | flat=192.168.1.154 |

+--------------------------------------+--------------+--------+------------+-------------+--------------------+

[root@linux-node2 src]# nova show 3483d9f1-4015-48d9-9837-b67ca82dd54d | grep 'OS-EXT-SRV-ATTR:hos'

| OS-EXT-SRV-ATTR:host                 | linux-node2.openstack

二、openstack的虚拟机在线迁移（”热迁移“，虚拟机在运行中迁移）

直接在控制节点上操作

1）查看虚拟机

[root@linux-node1 src]# source admin-openrc.sh

[root@linux-node1 src]# nova list

+--------------------------------------+----------------------------+--------+------------+-------------+--------------------+

| ID                                   | Name                       | Status | Task State | Power State | Networks           |

+--------------------------------------+----------------------------+--------+------------+-------------+--------------------+

| b6a4738d-7e01-4068-a09b-7008b612d126 | beta-new1                  | ACTIVE | -          | Running     | flat=192.168.1.151 |

| 9acdb28b-02c2-41bb-87c4-5f3a8fa008ab | dev-new-test1              | ACTIVE | -          | Running     | flat=192.168.1.150 |

| 30e5ba3e-3942-4119-9ba6-7523cf865b6f | fangfull-backup            | ACTIVE | -          | Running     | flat=192.168.1.152 |

| 3483d9f1-4015-48d9-9837-b67ca82dd54d | kvm-server005              | ACTIVE | -          | Running     | flat=192.168.1.154 |

| 5ec50ae5-a1f9-4425-b509-cfeb5ef62ca3 | memcache1-backup           | ACTIVE | -          | Running     | flat=192.168.1.155 |

| a5863e46-ef75-4601-a9df-505da5db58ed | memcache2-backup           | ACTIVE | -          | Running     | flat=192.168.1.156 |

| 377c536e-4d27-4447-8d9d-24c2686a73f6 | memcache3-backup           | ACTIVE | -          | Running     | flat=192.168.1.103 |

| a2893208-3ec9-4606-ab82-d7a870206cb9 | xqsj-backup                | ACTIVE | -          | Running     | flat=192.168.1.153 |

+--------------------------------------+----------------------------+--------+------------+-------------+--------------------+

2）查看待迁虚拟机kvm-server005所在的宿主机

[root@linux-node1 src]# nova show 3483d9f1-4015-48d9-9837-b67ca82dd54d | grep 'OS-EXT-SRV-ATTR:hos'

| OS-EXT-SRV-ATTR:host                 | linux-node1.openstack

3）查看可用的计算节点

[root@linux-node1 src]# nova-manage service list

No handlers could be found for logger "oslo_config.cfg"

Binary           Host                                 Zone             Status     State Updated_At

.........

nova-compute     linux-node1.openstack                nova             enabled    :-)   2016-11-01 05:12:56

nova-compute     linux-node2.openstack                nova             enabled    XXX   2016-10-31 05:55:24

4）查看目标计算节点linux-node2.openstack资源

[root@linux-node1 src]# nova-manage service describe_resource linux-node2.openstack

No handlers could be found for logger "oslo_config.cfg"

HOST                              PROJECT     cpu mem(mb)     hdd

linux-node2.openstack(total)                        32   64211     149

linux-node2.openstack(used_now)                      6   14848      75

linux-node2.openstack(used_max)                      6   14336      75

linux-node2.openstack    0cd3632df93d48d6b2c24c67f70e56b8       6   14336      75

5）执行虚拟机的在线迁移，迁移到计算节点linux-node2.openstack上

[root@linux-node1 src]# nova live-migration 3483d9f1-4015-48d9-9837-b67ca82dd54d linux-node2.openstack

6）查看迁移后虚拟机kvm-server005所在的宿主机是否已发生改变

[root@linux-node1 src]# nova show 3483d9f1-4015-48d9-9837-b67ca82dd54d | grep 'OS-EXT-SRV-ATTR:hos'

| OS-EXT-SRV-ATTR:host                 | linux-node2.openstack

注意：

1）/etc/hosts文件提前做好主机映射，确定节点之间能互相ping通主机名。
2）利用id nova命令查看下控制节点nova的uid和gid，并记录，保证两个计算节点的id和gid是否和控制节点保持一致
如果不一致，则利用
usermod -u “控制节点的nova的uid”
gropumod -g “控制节点的nova的gid”
两条命令进行修改,同时在所有计算节点运行该命令，保证所有nova相关文件使用新的uid和gid

最新文章

  1. 初学者--bootstrap（四）栅格系统----在路上（8）
  2. C++ 画星号图形——空心三角形（星号左对齐）（核心代码介绍）
  3. CentOS 6忘记密码解决办法，root和普通用户均可
  4. linux中非root用户使用wireshark进行抓包
  5. mysql把查询的结果格式成日期
  6. 设置session的生存时间
  7. jquery 2.0.3代码结构
  8. Oracle 10g 默认安装带来的用户名/密码
  9. ZOJ 1234 Chopsticks（动态规划）
  10. HttpRequest 和HttpWebRequest的区别
  11. Python自动化运维之28、Django(二)
  12. macbook连接linuxserver后不显示matlab桌面［问题］
  13. js 实现自动换行
  14. 201521123013 《Java程序设计》第11周学习总结
  15. 编写第一个Flutter App（翻译）
  16. MySQL—增删改查，分组，连表，limit，union，alter，排序，去重
  17. face recognition[MobileFaceNet]
  18. Ue4管线中的灯光信息
  19. MySQL 5.5 服务器变量详解(二)
  20. Linux系统分区方案（CentOs 6）

热门文章

  1. Javascript面向对象编程（三) --- 非构造函数的继承
  2. LinearLayout嵌套
  3. 在 SharePoint Server 2013 中配置建议和使用率事件类型
  4. 【读书笔记】iOS-NSNumber
  5. UISlider显示进度(并且实现图片缩放)
  6. iOS－RegexKitLite导入错误
  7. UIActionSheet 修改字体颜色
  8. Java集合 之 Queue集合
  9. linux下安装mysql手记
  10. Effective Java 40 Design method signatures carefully