Hi George, Just to be sure, how is the probe "health" defined in your VCL?
Cheers, -- Guillaume Quintard On Mon, Apr 17, 2023 at 1:23 AM George <[email protected]> wrote: > Hi, > > I have a Varnish/nginx cluster running with varnish-7.1.2-1.el7.x86_64 on > CentOS 7. > > The issue I am having comes from the varnish health checks. I am getting a > "broken pipe" error in the nginx error log at random times like below: > Apr 10 17:32:46 VARNISH-MASTER nginx_varnish_error: 2023/04/10 17:32:46 > [info] 17808#17808: *67626636 writev() failed (32: Broken pipe), client: > unix:, server: _, request: "GET /varnish_check HTTP/1.1", host: "0.0.0.0" > > The strange thing is that this error appears only when Varnish performs > the health checks. I have other scripts doing it(nagios, curl, wget, AWS > ELB) but those do not show any errors. In addition to this Varnish and > nginx where the health checks occur are on the same server and it makes no > difference if I use a TCP connection or socket based one. > > Below are the varnish vcl and nginx locations for the health checks: > backend nginx_varnish { > .path = "/run/nginx/nginx.sock"; > .first_byte_timeout = 600s; > .probe = health; > } > > location = /varnish_check { > keepalive_timeout 305; > return 200 'Varnish Check'; > access_log /var/log/nginx/varnish_check.log main; > error_log /var/log/nginx/varnish_check_errors.log debug; > error_log > syslog:server=unix:/run/nginx_log.in.sock,facility=local1,tag=nginx_varnish_error,nohostname > info; > } > > Are there any docs I can read about how exactly varnish performs the > health checks and what internal processes are involved? > Did anyone happen to have similar issues? This is not causing any > operational problems for the cluster but it is just something that I want > to determine why it is happening because it just should not be happening. > > Please help > THanks in advance. > > _______________________________________________ > varnish-misc mailing list > [email protected] > https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc >
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