From 57c27b76fbb7dcc7477a573585f1366364bccdd6 Mon Sep 17 00:00:00 2001
From: Kristian Lyngstol <kly@kly.no>
Date: Sat, 22 Oct 2016 15:16:15 +0200
Subject: Big broken push of graphing

- Adds latency graphs everywhere, even where they shouldn't be. For PoC.
- Fixes a frontend leakage of handlers
- Adds a nasty way of getting latency-data into graphite (needs to be
  improved)
- Adds working graphite integration in varnish
- Adds config for graphite

Lots of things broken here, but it's a half-decent start.
---
 extras/misc/varnish.vcl | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'extras/misc')

diff --git a/extras/misc/varnish.vcl b/extras/misc/varnish.vcl
index 492f001..b10a640 100644
--- a/extras/misc/varnish.vcl
+++ b/extras/misc/varnish.vcl
@@ -7,6 +7,11 @@ backend default {
     .port = "80";
 }
 
+backend graphite {
+    .host = "gondul-graphite";
+    .port = "80";
+}
+
 sub vcl_recv {
     if (req.url ~ "^/where" || req.url ~ "^/location") {
 	set req.url = "/api/public/location";
@@ -27,6 +32,10 @@ sub vcl_recv {
         return (pass);
     }
 
+    if (req.url ~ "/render") {
+        set req.backend_hint = graphite;
+    }
+
     # Brukes ikke. Cookies er for nubs.
     unset req.http.Cookie;
 
@@ -48,6 +57,15 @@ sub vcl_backend_response {
     if (beresp.http.x-ban) {
         ban("obj.http.x-url ~ " + beresp.http.x-ban);
     }
+    if (bereq.url ~ "/render") {
+        # Graphite claims "no-cache", which is dumb.
+        # Let's blindly cache for 5+10s. Which is 10000 times better.
+        set beresp.http.Cache-Control = "max-age=5s";
+        unset beresp.http.Pragma;
+        set beresp.uncacheable = false;
+        set beresp.grace = 10s;
+        set beresp.ttl = 5s;
+    }
     if (beresp.status != 200) {
         set beresp.uncacheable = false;
         set beresp.ttl = 5s;
-- 
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