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Re: [libvirt] Issue with libvirtd



On 01/10/2017 10:19 AM, Michal Privoznik wrote:
On 01/10/2017 07:48 AM, Faysal Ali wrote:
Hi Michal,

[It is usually good idea to keep the list CCed - it may help others
finding a solution to their problems]


Well I have created my little python/libivrt app to manage my virtual
machines. I am using python socket to check libivrt port availability, and
the error End of file while reading data: Input/output error* only happens
whenever that python socket script is trigger.

Here is the script of python socket

import libvirt, socket, sys

hostname='kvm09'
port = 16509

try:
      socket_host = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
      socket_host.settimeout(1)
      socket_host.connect((hostname, port))
      socket_host.close()
      print 'true'
except Exception as err:
      print err

Ah, I haven't expected this. Of course your are seeing the error
message. Libvirt has its own protocol on the top of TCP and since you
are connecting and dying immediately - without sending any valid libvirt
packet, the daemon logs an error. This is perfectly expected.

Also, this is *not* how you connect to libvirt. You want to open a
libvirt connection:

conn = libvirt.open(uri)
dom = conn.lookupByName(name)
...

Michal

Michal,
my expectation is that virsh is using a libvirt connection.
Anyway I am getting the error whenever I use virsh start, virsh destroy or virsh shutdown on a domain, e.g.

Feb 06 14:01:30 s38lp24 virtlogd[42845]: 2017-02-06 13:01:30.675+0000: 42845: error : virNetSocketReadWire:1800 : End of file while reading data: Input/output error Feb 06 14:04:32 s38lp24 virtlogd[42845]: 2017-02-06 13:04:32.991+0000: 42845: error : virNetSocketReadWire:1800 : End of file while reading data: Input/output error

Would that also be covered under "This is perfectly expected."?


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   Boris Fiuczynski

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