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HypervisorUnavailable: Connection to the hypervisor is broken on host: compute01

asked 2014-12-25 07:01:07 -0500

RHK gravatar image

updated 2014-12-27 01:30:22 -0500

Hello,

I deployed a openstack multinode with juno release, when i launch VM status is getting error.

Here is the error logs i found in nova,

root@compute01:/var/log/nova# tail -f nova-compute.log
2014-12-25 02:17:57.947 7882 TRACE nova.openstack.common.threadgroup   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 3299, in _get_host_capabilities
2014-12-25 02:17:57.947 7882 TRACE nova.openstack.common.threadgroup     xmlstr = self._conn.getCapabilities()
2014-12-25 02:17:57.947 7882 TRACE nova.openstack.common.threadgroup   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 775, in _get_connection
2014-12-25 02:17:57.947 7882 TRACE nova.openstack.common.threadgroup     wrapped_conn = self._get_new_connection()
2014-12-25 02:17:57.947 7882 TRACE nova.openstack.common.threadgroup   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 728, in _get_new_connection
2014-12-25 02:17:57.947 7882 TRACE nova.openstack.common.threadgroup     wrapped_conn = self._connect(self.uri(), self.read_only)
2014-12-25 02:17:57.947 7882 TRACE nova.openstack.common.threadgroup   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 848, in _connect
2014-12-25 02:17:57.947 7882 TRACE nova.openstack.common.threadgroup     raise exception.HypervisorUnavailable(host=CONF.host)
2014-12-25 02:17:57.947 7882 TRACE nova.openstack.common.threadgroup HypervisorUnavailable: Connection to the hypervisor is broken on host: compute01
2014-12-25 02:17:57.947 7882 TRACE nova.openstack.common.threadgroup

and when i restart libvirt service getting unknown job,

root@compute01:~# service libvirt-bin restart
stop: Unknown job: libvirt-bin
start: Unknown job: libvirt-bin

I verified from hypervisor side it looks ok.

root@compute01:~# kvm-ok
INFO: /dev/kvm exists
KVM acceleration can be used

here is my qemu.conf

cgroup_device_acl = [
"/dev/null", "/dev/full", "/dev/zero",
"/dev/random", "/dev/urandom",
"/dev/ptmx", "/dev/kvm", "/dev/kqemu",
"/dev/rtc", "/dev/hpet","/dev/net/tun"
]

nova-compute.conf

root@compute01:~# vim /etc/nova/nova-compute.conf
[DEFAULT]
compute_driver=libvirt.LibvirtDriver
[libvirt]
virt_type=kvm

any one let me know what i am missing from hypervisor side.

Regards,
RHK

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libvirt-bin should run as service in Ubuntu. There was error with Libvirt&&KVM setup.

dbaxps gravatar imagedbaxps ( 2014-12-25 07:13:27 -0500 )edit

is there any solution to fix this issue?

RHK gravatar imageRHK ( 2014-12-25 07:27:08 -0500 )edit
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5 answers

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1

answered 2014-12-26 00:05:23 -0500

exergy gravatar image

hope you have upgraded and updated your OS before juno installation also you can check your config files

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kernel updates done with out any issue.

RHK gravatar imageRHK ( 2014-12-26 00:32:43 -0500 )edit
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1

answered 2015-01-23 14:25:59 -0500

vishwanathj gravatar image

I ran into similar issue and in my case the user (stack) was not added to the libvirtd group. I executed the command "sudo gpasswd -a stack libvirtd" to add the user 'stack' to libvirtd group. I logged out and logged in for the changes to take effect, restarted screen and the issue was resolved. Execute the 'id <user>' command to confirm if the user has been added to libvirtd group.

stack@vish-ubuntu:~$ id stack uid=1001(stack) gid=1001(stack) groups=1001(stack),27(sudo),122(libvirtd)

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I got the same issue. After executed "sudo gpasswd -a nova libvirt", current the service nova-compute is normal, thank you.

tsengyichun gravatar imagetsengyichun ( 2016-03-14 03:51:21 -0500 )edit
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0

answered 2015-12-11 06:47:45 -0500

chandra gravatar image

Try "/etc/init.d/libvirt-bin restart" instead of "service libvirt-bin restart" and then restart nova-compute

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answered 2014-12-25 07:16:31 -0500

dbaxps gravatar image

updated 2014-12-25 07:17:00 -0500

Run in shell:

libvirt -l 
and you'll see why it fails.
You can have a look into /var/log/libvirtd.log
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no logs found in /var/log/libvirtd.log

root@compute01:~# libvirtd -l

command hanging no output.

RHK gravatar imageRHK ( 2014-12-25 07:24:50 -0500 )edit

Here instructions for 14.04 bare metal :- http://sharadchhetri.com/2014/10/09/i...

dbaxps gravatar imagedbaxps ( 2014-12-25 08:45:00 -0500 )edit

I've just reproduced KVM&&Libvirt install on VM (2 VCPUS, 4 GB RAM)

boris@boris-KVM:~$ sudo stop libvirt-bin
libvirt-bin stop/waiting
boris@boris-KVM:~$ sudo start libvirt-bin
libvirt-bin start/running, process 7367
dbaxps gravatar imagedbaxps ( 2014-12-25 09:54:52 -0500 )edit

During apt-get install qemu-kvm libvirt-bin bridge-utils

Setting up libvirt-bin (1.2.2-0ubuntu13.1.7) ...
Adding group `libvirtd' (GID 126) ...
Done.
libvirt-bin start/running, process 5414
dbaxps gravatar imagedbaxps ( 2014-12-25 09:56:58 -0500 )edit

Check your configuration files.

dbaxps gravatar imagedbaxps ( 2014-12-25 09:58:41 -0500 )edit
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answered 2015-06-14 21:13:30 -0500

dchamorro gravatar image

This is usually due to libvirtd set to listen to TLS connections.

Edit the following: 

/etc/libvirt/libvirtd.conf

Find the following line:

listen_tls = 1

And change it to:

listen_tls = 0

Restart libvirtd and restart nova-compute.

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Asked: 2014-12-25 07:01:07 -0500

Seen: 5,786 times

Last updated: Dec 11 '15

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