openstack instance err:”Exeeded maximum number of retries”

0, the error instance log show:

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1, check the /var/log/nova/nova-compute.log, the log show:

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maybe the device cannot support the kvm or not have the modue

reference from : 

"https://ask.openstack.org/en/question/99882/libvirterror-invalid-argument-could-not-find-capabilities-for-domaintypekvm/"

"https://github.com/minishift/minishift/issues/1630"

2, install the qemu-kvm

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3, restart the nova-compute container 

and relaunch a new instance, it still show the same err:"Exeeded maximum number of retries", but the nova-compute.log show difference, there is no permission access kvm character device

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reference from: "https://serverfault.com/questions/1002043/libvirt-has-no-kvm-capabilities-even-though-qemu-kvm-works"

4, and the change the permission to 666 /dev/kvm

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5, relaunch the instance and it works