Re: [collectd] How often does Collectd read resolv.conf?
Am 30.05.2015 um 19:55 schrieb Florian Forster: Hi Shorty, Peace octo, Thanks for the explanation. the write_graphite plugin will call getaddrinfo(3) on every connection attempt. How the name resolution is done depends on the C library – on many GNU/Linux systems DNS is one of multiple possibilities, for example. If /etc/resolv.conf is read, if it is re-read when modified and so on is out of our control, unfortunately. Would be systemd-resolved of any help here? I haven't looked into it. Just a guess. Cheers, Shorty ___ collectd mailing list collectd@verplant.org http://mailman.verplant.org/listinfo/collectd
Re: [collectd] How often does Collectd read resolv.conf?
On Fri, Jun 05, 2015 at 11:38:05AM +0200, Markus Shorty Uckelmann wrote: Am 30.05.2015 um 19:55 schrieb Florian Forster: Hi Shorty, Peace octo, Thanks for the explanation. the write_graphite plugin will call getaddrinfo(3) on every connection attempt. How the name resolution is done depends on the C library – on many GNU/Linux systems DNS is one of multiple possibilities, for example. If /etc/resolv.conf is read, if it is re-read when modified and so on is out of our control, unfortunately. Would be systemd-resolved of any help here? I haven't looked into it. Just a guess. Note that IIRC glibc (and probably other resolver libraries) will reread /etc/resolv.conf when res_init() is called, so it's possible for the application to have some say in when it's reread. Dan ___ collectd mailing list collectd@verplant.org http://mailman.verplant.org/listinfo/collectd
Re: [collectd] How often does Collectd read resolv.conf?
Hi Shorty, On Fri, May 29, 2015 at 09:05:53PM +0200, Markus Shorty Uckelmann wrote: So back to it and Collectd wasn't able to resolve it's Graphite host. So even after a few hours it didn't re-read /etc/resolv.conf. the write_graphite plugin will call getaddrinfo(3) on every connection attempt. How the name resolution is done depends on the C library – on many GNU/Linux systems DNS is one of multiple possibilities, for example. If /etc/resolv.conf is read, if it is re-read when modified and so on is out of our control, unfortunately. HTH, best regards, —octo -- collectd – The system statistics collection daemon Website: http://collectd.org Google+: http://collectd.org/+ GitHub: https://github.com/collectd Twitter: http://twitter.com/collectd signature.asc Description: Digital signature ___ collectd mailing list collectd@verplant.org http://mailman.verplant.org/listinfo/collectd
[collectd] How often does Collectd read resolv.conf?
Hi all, It just happened that one of our servers had a wrong resolv.conf. We corrected this. A few hours later we saw that we had no metrics from Collectd from this server. So back to it and Collectd wasn't able to resolve it's Graphite host. So even after a few hours it didn't re-read /etc/resolv.conf. Is this a desired behaviour? I think Collectd should once in a while re-read /etc/resolv.conf Cheers, Shorty signature.asc Description: OpenPGP digital signature ___ collectd mailing list collectd@verplant.org http://mailman.verplant.org/listinfo/collectd
Re: [collectd] How often does Collectd read resolv.conf?
this is an issue with glibc, NOT with collectd. It’s not fun but most versions of glibc do not do resolv.conf reloading. I agree it’s not fun but this is a bug in glibc not collectd. Long story short, don’t ever change your DNS servers IPs.. otherwise it’s just no fun. On Fri, May 29, 2015 at 12:05 PM, Markus Shorty Uckelmann sho...@koeln.de wrote: Hi all, It just happened that one of our servers had a wrong resolv.conf. We corrected this. A few hours later we saw that we had no metrics from Collectd from this server. So back to it and Collectd wasn't able to resolve it's Graphite host. So even after a few hours it didn't re-read /etc/resolv.conf. Is this a desired behaviour? I think Collectd should once in a while re-read /etc/resolv.conf Cheers, Shorty ___ collectd mailing list collectd@verplant.org http://mailman.verplant.org/listinfo/collectd -- Founder/CEO Spinn3r.com Location: *San Francisco, CA* blog: http://burtonator.wordpress.com … or check out my Google+ profile https://plus.google.com/102718274791889610666/posts ___ collectd mailing list collectd@verplant.org http://mailman.verplant.org/listinfo/collectd
