[Bug 584862] Re: libvirt launches dnsmasq for non-dhcp networks.

[Bug Watch Updater]

** Changed in: libvirt (Fedora)
   Status: Unknown => Won't Fix

** Changed in: libvirt (Fedora)
   Importance: Unknown => Medium

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Title:
  libvirt launches dnsmasq for non-dhcp networks.

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[Bug 584862] Re: libvirt launches dnsmasq for non-dhcp networks.

[Serge Hallyn]

(Closed per discussion in the rh bug)

** Changed in: libvirt (Ubuntu)
   Status: Confirmed => Won't Fix

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Title:
  libvirt launches dnsmasq for non-dhcp networks.

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[Bug 584862] Re: libvirt launches dnsmasq for non-dhcp networks.

[Serge Hallyn]

In
https://www.redhat.com/archives/libvir-list/2015-December/msg00086.html

Laine gave some good feedback.  I will not have time this year to follow
up on it, but there is good guidance there for someone who wants to give
it a try.

Note that as smb pointed out this really is low priority since most
people define their own bridge outside of libvirt and just attach vms to
those.

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Title:
  libvirt launches dnsmasq for non-dhcp networks.

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[Bug 584862] Re: libvirt launches dnsmasq for non-dhcp networks.

[Serge Hallyn]

** Changed in: libvirt (Ubuntu)
   Status: Incomplete => Confirmed

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Title:
  libvirt launches dnsmasq for non-dhcp networks.

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[Bug 584862] Re: libvirt launches dnsmasq for non-dhcp networks.

[Serge Hallyn]

Ok, I've not yet written the patch, but have proposed on the libvirt
channel a way to resolve this.  Hoping to send a patch to the mailing
list next week.

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Title:
  libvirt launches dnsmasq for non-dhcp networks.

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[Bug 584862] Re: libvirt launches dnsmasq for non-dhcp networks.

[guenther kuenzel]

it is getting worse with virsh and lxc containers.
i have 60 lxc containers running, each of them connected to 4 networks.
thats alot of overhead for no usefull functionality, DHCP and DNS is already 
served by standalone servers.

it might be ok if you got a standalone home server with one or two VMs
on it. but if you have a productive server which can handle hundreds of
lxc containers it is getting out of control.

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Title:
  libvirt launches dnsmasq for non-dhcp networks.

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[Bug 584862] Re: libvirt launches dnsmasq for non-dhcp networks.

[Stefan Bader]

I am wondering what should be done with this bug report since it has not
seen any update for so long. I believe even at the time of it being
reported this looks to be an intentional mode of operation. From
searching through the upstream git repo I found this commit which at
least re-introduced this (this followed 0.8.8 and appears to be some
security related change as well):

commit 7892edc9cc45e4fb1079b627bda3f571ac27041f
Author: Laine Stump 
Date:   Fri Mar 11 11:47:58 2011 -0500

network driver: Start dnsmasq even if no dhcp ranges/hosts are
specified.

In this situation dnsmasq will purely act as a DNS cache. It should be
possible to set up ones own DHCP service though maybe not using dnsmasq
(since I don't see a no-dns mode there). isc-dhcp-server should work.
Generally I think the idea in libvirt seems to be that any network
defined via libvirt will also get those services provided. And for any
more complex setup one has to do the network definitions outside
libvirt.

For example I often use a transparent bridge which I define in
/etc/network/interfaces and then attach VMs to that bridge. This can be
defined within libvirt as a mode='bridge' network. Though in practice I
don't have that and actually assign VMs the "shared device" (the bridge)
directly. Not sure this is good practice, though. Both methods work.

So generally I would be tending to close this bug as "won't fix" since
this is intended behaviour by upstream. Maybe needs a better
documentation somewhere (not sure where) but maybe there already is.
After all this all was 3y ago...

** Changed in: libvirt (Ubuntu)
   Status: Triaged => Incomplete

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Title:
  libvirt launches dnsmasq for non-dhcp networks.

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[Bug 584862] Re: libvirt launches dnsmasq for non-dhcp networks.

[Michael Adam]

I am also currently struggeling with this behaviour:

I would like to configure bridges with libvirt but start my own universal 
dnsmasq separately.
iirc, earlier versions of libvirt did not launch dnsmasq (not even for serving 
dns), when
the  section was not present in the network xml file.

I am running libvirt Version: 0.9.2-4ubuntu15.2 on oneric (11.10).

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Title:
  libvirt launches dnsmasq for non-dhcp networks.

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[Bug 584862] Re: libvirt launches dnsmasq for non-dhcp networks.

[guenther kuenzel]

i would like to point out, that it starts dnsmasq but it does not listen for 
dhcp.
it listen to dns, even if no dns entries are defined for the network.

# virsh net-dumpxml default
   

 
  default  

 
  ff2d70f9-7613-05fe-7c67-40b2d7f6b0e4 

 
   

 
 

 
  

 


 
   

 
 

 
   

 
 

 
   

 
  

 

# ps -e --format=args | grep dnsmasq
  
dnsmasq --strict-order --bind-interfaces 
--pid-file=/var/run/libvirt/network/default.pid --conf-file= --except-interface 
lo --listen-address 192.168.122.1 --listen-address 192.168.10.0 
--listen-address 192.168.20.0

# netstat --listen --numeric --tcp --udp --programs | grep dnsmasq  

  
tcp0  0 192.168.122.1:530.0.0.0:*   LISTEN  
6160/dnsmasq
tcp0  0 192.168.10.0:53 0.0.0.0:*   LISTEN  
6160/dnsmasq
tcp0  0 192.168.20.0:53 0.0.0.0:*   LISTEN  
6160/dnsmasq
udp0  0 192.168.122.1:530.0.0.0:*   
6160/dnsmasq
udp0  0 192.168.10.0:53 0.0.0.0:*   
6160/dnsmasq
udp0  0 192.168.20.0:53 0.0.0.0:*   
6160/dnsmasq

dnsmasq should not start if no dhcp and no dns is defined in network xml

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  libvirt launches dnsmasq for non-dhcp networks.

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[Bug 584862] Re: libvirt launches dnsmasq for non-dhcp networks.

[Serge Hallyn]

@Steffen

could you please open a new bug for your issue, preferably using
'ubuntu-bug libvirt' ?

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[Bug 584862] Re: libvirt launches dnsmasq for non-dhcp networks.

[Steffen Röcker]

On natty libvirt seems to start dnsmasq on lo by default despite
"--except-interface lo".

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[Bug 584862] Re: libvirt launches dnsmasq for non-dhcp networks.

[Mathias Gug]

** Bug watch added: Red Hat Bugzilla #636115
   https://bugzilla.redhat.com/show_bug.cgi?id=636115

** Changed in: libvirt (Fedora)
 Remote watch: Red Hat Bugzilla #508965 => Red Hat Bugzilla #636115

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Subject: [jira] Commented: (HBASE-3161) Provide option for Stargate to only
 serve GET requests
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[ 
https://issues.apache.org/jira/browse/HBASE-3161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12930760#action_12930760
 ] 

HBase Review Board commented on HBASE-3161:
---

Message from: "Bennett Neale" 


bq.  On 2010-11-10 08:34:06, stack wrote:
bq.  > This patch looks great to me.  Andrew or Ted, you want to take a look?  
Bennett do all hbase tests pass locally for you?

Tests pass locally, already see you committed.  Cool.  :)


- Bennett


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> Provide option for Stargate to only serve GET requests
> --
>
> Key: HBASE-3161
> URL: https://issues.apache.org/jira/browse/HBASE-3161
> Project: HBase
>  Issue Type: Improvement
>  Components: rest
>Affects Versions: 0.20.6
>Reporter: Ted Yu
> Fix For: 0.90.0
>
>
> Provide option for Stargate to only serve GET requests. Hbase health check 
> can utilize this option.

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[Bug 584862] Re: libvirt launches dnsmasq for non-dhcp networks.

[Mathias Gug]

** Bug watch added: Red Hat Bugzilla #508965
   https://bugzilla.redhat.com/show_bug.cgi?id=508965

** Also affects: libvirt (Fedora) via
   https://bugzilla.redhat.com/show_bug.cgi?id=508965
   Importance: Unknown
   Status: Unknown

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[Bug 584862] Re: libvirt launches dnsmasq for non-dhcp networks.

[Mathias Gug]

** Changed in: libvirt (Ubuntu)
   Status: New => Triaged

** Changed in: libvirt (Ubuntu)
   Importance: Undecided => Medium

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[Bug 584862] Re: libvirt launches dnsmasq for non-dhcp networks.

[Neil Wilson]

** Attachment added: "Dependencies.txt"
   http://launchpadlibrarian.net/49007670/Dependencies.txt

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