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migration - host key verification failed

asked 2015-09-15 02:43:30 -0500

prapul gravatar image

Hi All,

I am completed my private setup with 3 nodes controller,nova& neutron with + centos 7 i am able to create my instance and running perfect my kvm host uses internal storage, now i added second host kvm with local storage to my existing setup, now i try to migrate vm to newly added host when i click migrate on ui interface got the below error

Error: Failed to launch instance "lb1-ceca74d8-a9b6-44c9-a9b0-401208890afc": Please try again later [Error: Unexpected error while running command. Command: ssh mkdir -p /var/lib/nova/instances/ceca74d8-a9b6-44c9-a9b0-401208890afc Exit code: 255 Stdout: u'' Stderr: u'Host key verification failed.\r\n'].

My doubt is openstack support to migrate vm when uses local storage ? if not what kind of storage i need to use.... need suggestions... thanks in advance....

Regards, Prapul

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answered 2015-09-15 03:28:44 -0500

fifieldt gravatar image


It sounds like you might need to perform some additional steps to configure your cloud for live migrations. Particularly, you need to set up SSH so your hypervisor hosts can log into each other (if you google "Host Key Verification Failed" you will find some techniques to deal with this, such as distributing a known_hosts file).

Further information about migrations and storage can be found in the Admin Guide at

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Asked: 2015-09-15 02:43:30 -0500

Seen: 1,254 times

Last updated: Sep 15 '15