A19. openstack架构实战-云主机的冷迁移
1:开启nova计算节点之间互信
冷迁移需要nova计算节点之间使用nova用户互相免密访问
默认nova用户禁止登入,开启所有计算节点的nova用户登入shell。
[root@compute01 ~]# su - nova
This account is currently not available.
所有计算几点都需要开启:
[root@compute01 ~]# usermod -s /bin/bash nova
[root@compute02 ~]# usermod -s /bin/bash nova
[root@compute02 ~]# su - nova
-bash-4.2$ cp /etc/skel/.bash* .
-bash-4.2$ exit
logout
[root@compute02 ~]# su - nova
Last login: Sun Jun 7 14:14:50 CST 2020 on pts/0
[nova@compute02 ~]$
生成密钥对进行免密通信:
[root@compute02 ~]# su - nova
[nova@compute02 ~]$ ssh-keygen -t rsa -q -N ''
Enter file in which to save the key (/var/lib/nova/.ssh/id_rsa):
[nova@compute02 ~]$ ls .ssh/
id_rsa id_rsa.pub
将自己和自己进行通信
[nova@compute02 ~]$ cp -fa .ssh/id_rsa.pub .ssh/authorized_keys
将密钥拷贝到其他的通信节点:
[nova@compute02 ~]$ scp -rp .ssh root@10.100.214.202:`pwd`
授权nova用户使用密钥的权限:
[root@compute01 ~]# ll /var/lib/nova/.ssh/
total 16
-rw-r--r-- 1 root root 396 Jun 7 14:17 authorized_keys
-rw------- 1 root root 1675 Jun 7 14:17 id_rsa
-rw-r--r-- 1 root root 396 Jun 7 14:17 id_rsa.pub
-rw-r--r-- 1 root root 176 Jun 7 14:21 known_hosts
[root@compute01 ~]# chown -R nova:nova /var/lib/nova/.ssh/
测试两个计算节点是否可以免密登入:
2:修改控制节点的配置文件
vim /etc/nova/nova.conf
[DEFAULT]
scheduler_default_filters=RetryFilter,AvailabilityZoneFilter,RamFilter,DiskFilter,ComputeFilter,ComputeCapabilitiesFilter,ImagePropertiesFilter,ServerGroupAntiAffinityFilter,ServerGroupAffinityFilter
重启调度服务:
[root@controller01 ~]# systemctl restart openstack-nova-scheduler.service
3:修改计算几点的配置文件:
[root@compute01 ~]# vim /etc/nova/nova.conf
[DEFAULT]
allow_resize_to_same_host = True
重启计算服务:
[root@compute01 ~]# systemctl restart openstack-nova-compute
在dashboard上进行操作,测试云主机是否迁移: