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Posted to dev@cloudstack.apache.org by Pierre-Luc Dion <pd...@cloudops.com> on 2017/11/24 20:05:56 UTC
[VR] dnsmasq reload instead of restart
Hi,
We recently found a way to reload dnsmasq process instead of doing a
restart.
Does anyone see a problem with that? Basically we have to change where the
file /etc/dhcphosts.txt is define in the config so it would be define via
"--dhcp-hostsfile=/etc/dhcphosts.txt" when the process is start so it would
be re-read in a kill -HUP.
The problem to solve here is that during VM.CREATE in a VPC, the dns
service is restarted and cause DNS service interruption to VM inside the
VPC.
We are preparing a PR for this.
is this could be problematic for rVR ?
Thanks,
PL
Re: [VR] dnsmasq reload instead of restart
Posted by Pierre-Luc Dion <pd...@cloudops.com>.
good point !
Based on what I understand from dnsmasq, reload will not update conf for
the interface of a new network tier.
On Fri, Nov 24, 2017 at 6:44 PM, Erik Weber <te...@gmail.com> wrote:
> I'm not sure if this applies to dnsmasq or not, but some services does
> not bind to new interfaces during a reload.
> Meaning you'll have to be sure the reason you're reloading isn't
> because of something that added a device (say adding a new tier or
> similar).
>
> --
> Erik
>
> On Fri, Nov 24, 2017 at 9:05 PM, Pierre-Luc Dion <pd...@cloudops.com>
> wrote:
> > Hi,
> >
> > We recently found a way to reload dnsmasq process instead of doing a
> > restart.
> > Does anyone see a problem with that? Basically we have to change where
> the
> > file /etc/dhcphosts.txt is define in the config so it would be define via
> > "--dhcp-hostsfile=/etc/dhcphosts.txt" when the process is start so it
> would
> > be re-read in a kill -HUP.
> >
> > The problem to solve here is that during VM.CREATE in a VPC, the dns
> > service is restarted and cause DNS service interruption to VM inside the
> > VPC.
> >
> > We are preparing a PR for this.
> >
> > is this could be problematic for rVR ?
> >
> > Thanks,
> >
> > PL
>
Re: [VR] dnsmasq reload instead of restart
Posted by Erik Weber <te...@gmail.com>.
I'm not sure if this applies to dnsmasq or not, but some services does
not bind to new interfaces during a reload.
Meaning you'll have to be sure the reason you're reloading isn't
because of something that added a device (say adding a new tier or
similar).
--
Erik
On Fri, Nov 24, 2017 at 9:05 PM, Pierre-Luc Dion <pd...@cloudops.com> wrote:
> Hi,
>
> We recently found a way to reload dnsmasq process instead of doing a
> restart.
> Does anyone see a problem with that? Basically we have to change where the
> file /etc/dhcphosts.txt is define in the config so it would be define via
> "--dhcp-hostsfile=/etc/dhcphosts.txt" when the process is start so it would
> be re-read in a kill -HUP.
>
> The problem to solve here is that during VM.CREATE in a VPC, the dns
> service is restarted and cause DNS service interruption to VM inside the
> VPC.
>
> We are preparing a PR for this.
>
> is this could be problematic for rVR ?
>
> Thanks,
>
> PL