Blew away .../var/varnish/HOSTNAME/ -- broke varnishstat, how to recover?
We're using varnish for a public site, works beautifully and handled getting slashdotted gracefully -- many thanks! We built it with zc.buildout which creates .../parts/varnish/install/ var/varnish/FQDN/... and others. In a recent update, I accidentally blew away the .../var/varnish/FQDN directory which contained a few files that seem necessary for varnishstat and perhaps others to work. bin.XXkP5ZYv _.c _.vsl $ varnishstat Cannot open /usr/local/mastersite_buildout/parts/varnish/install/var/ varnish/FQDN/_.vsl: No such file or directory Varnish continues to serve well, so I haven't restarted. What's the recommended way to re-create this directory? I'm assuming restarting Varnish will re-create it but want to be sure. We have to fill out pounds of paperwork in order to take any outage on a public server, no matter how small. Is there a way to restart Varnish without any downtime -- to continue accepting but holding connections until restarted, rather like Apache's apachectl graceful does? Other ideas? Thanks. ___ varnish-misc mailing list varnish-misc@projects.linpro.no http://projects.linpro.no/mailman/listinfo/varnish-misc
Re: Blew away .../var/varnish/HOSTNAME/ -- broke varnishstat, how to recover?
On Jun 2, 2008, at 11:19 AM, Poul-Henning Kamp wrote: Yes, restarting varnish (completely: ie both manager and child process) should recreate it with no side effects. Varnish doesn't spend long time on startup, so I would just get it done and over with. Just tried it on a QA server and it restarts in about 0.25 seconds, and re-creates the directory with the _.vsl file. Have to see if my overlords are OK with that. Thanks. (In the meantime, if you have enabled the telnet option, you can still see the stats through the CLI interface.) I do have that and can ask it for stats. Thanks for the reminder. ___ varnish-misc mailing list varnish-misc@projects.linpro.no http://projects.linpro.no/mailman/listinfo/varnish-misc
Re: Blew away .../var/varnish/HOSTNAME/ -- broke varnishstat, how to recover?
In message [EMAIL PROTECTED], Chris Shenton write s: What's the recommended way to re-create this directory? I'm assuming restarting Varnish will re-create it but want to be sure. Yes, restarting varnish (completely: ie both manager and child process) should recreate it with no side effects. We have to fill out pounds of paperwork in order to take any outage on a public server, no matter how small. Is there a way to restart Varnish without any downtime -- to continue accepting but holding connections until restarted, rather like Apache's apachectl graceful does? Other ideas? Varnish doesn't spend long time on startup, so I would just get it done and over with. You are in no rush however, so you can schedule it for whenever you want. (In the meantime, if you have enabled the telnet option, you can still see the stats through the CLI interface.) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ varnish-misc mailing list varnish-misc@projects.linpro.no http://projects.linpro.no/mailman/listinfo/varnish-misc
Re: Blew away .../var/varnish/HOSTNAME/ -- broke varnishstat, how to recover?
On Mon, Jun 2, 2008 at 7:57 AM, Chris Shenton [EMAIL PROTECTED] wrote: We have to fill out pounds of paperwork in order to take any outage on a public server, no matter how small. Is there a way to restart Varnish without any downtime -- to continue accepting but holding connections until restarted, rather like Apache's apachectl graceful does? Other ideas? Can you avoid the problem by putting your Varnish servers behind a load balancer? That way, you can preemptively disable the server from taking traffic on the LB side prior to restarting Varnish, thereby eliminating any perceivable customer effect. Also, be careful about using apachectl graceful (especially combined with log rotation), as connections that are currently idle but which may never receive traffic again will not be terminated. I consider it too leaky to use. Best regards, --Michael ___ varnish-misc mailing list varnish-misc@projects.linpro.no http://projects.linpro.no/mailman/listinfo/varnish-misc
