openstack云主机冷迁移

1：开启nova计算节点之间互信

冷迁移须要nova计算节点之间使用nova用户互相免密码访问

默认nova用户禁止登录，开启全部计算节点的nova用户登陆shell。

usermod -s /bin/bash nova

su - nova

ssh-keygen -t rsa

#生成密钥

cp -fa id_rsa.pub authorized_keys

将公钥发送给其余计算节点的nova用户的/var/lib/nova/.ssh目录下，注意权限和所属组

2：修改控制节点nova.conf

vi /etc/nova/nova.conf

[DEFAULT]

scheduler_default_filters=RetryFilter,AvailabilityZoneFilter,RamFilter,DiskFilter,ComputeFilter,ComputeCapabilitiesFilter,ImagePropertiesFilter,ServerGroupAntiAffinityFilter,ServerGroupAffinityFilter

 

重启openstack-nova-scheduler

systemctl restart openstack-nova-scheduler.service

3:修改全部计算节点

vi /etc/nova/nova.conf

[DEFAULT]

allow_resize_to_same_host = True

 

重启openstack-nova-compute

systemctl restart openstack-nova-compute.service

4：dashboard上进行操做