From 0c6f34ec54ca6b4ae390547b7b423e23545511ca Mon Sep 17 00:00:00 2001
From: Peter Palfrader <peter@palfrader.org>
Date: Mon, 28 May 2018 10:37:24 +0200
Subject: [PATCH] sallinen varnish

---
 modules/roles/manifests/snapshot_web.pp       | 22 +++++++++
 .../snapshot/snapshot.debian.org.vcl.erb      | 27 +++++++++++
 modules/varnish/manifests/config.pp           | 47 +++++++++++++++++++
 3 files changed, 96 insertions(+)
 create mode 100644 modules/roles/templates/snapshot/snapshot.debian.org.vcl.erb
 create mode 100644 modules/varnish/manifests/config.pp

diff --git a/modules/roles/manifests/snapshot_web.pp b/modules/roles/manifests/snapshot_web.pp
index c3eeddd2b..be3039c01 100644
--- a/modules/roles/manifests/snapshot_web.pp
+++ b/modules/roles/manifests/snapshot_web.pp
@@ -12,4 +12,26 @@ class roles::snapshot_web {
 		site   => 'snapshot.debian.org',
 		content => template('roles/snapshot/snapshot.debian.org.conf.erb')
 	}
+
+	case $::hostname {
+		'sallinen': {
+			varnish::default { 'default':
+				listen  => ':6081,[2001:630:206:4000:1a1a:0:c13e:ca1b]:80',
+				backend => 'file,/var/lib/varnish/varnish_storage.bin,8G',
+				content => template('roles/snapshot/snapshot.debian.org.vcl.erb'),
+			}
+
+			file { '/etc/apache2/ports.conf':
+				content  => @("EOF"),
+					Listen 0.0.0.0:80
+					Listen [2001:630:206:4000:1a1a:0:c13e:ca1a]:80
+					| EOF
+				require => Package['apache2'],
+				notify  => Service['apache2'],
+			}
+		}
+		default: {
+			fail ( "unknown host $::hostname for snapshot_web." )
+		}
+	}
 }
diff --git a/modules/roles/templates/snapshot/snapshot.debian.org.vcl.erb b/modules/roles/templates/snapshot/snapshot.debian.org.vcl.erb
new file mode 100644
index 000000000..25e6d1275
--- /dev/null
+++ b/modules/roles/templates/snapshot/snapshot.debian.org.vcl.erb
@@ -0,0 +1,27 @@
+#-e This is a basic VCL configuration file for varnish.  See the vcl(7)
+#man page for details on VCL syntax and semantics.
+vcl 4.0;
+
+backend default {
+ .host = "127.0.0.1";
+ .port = "80";
+}
+
+# weasel's rule:
+sub vcl_recv {
+ if (req.http.Cache-Control ~ "(?i)no-cache") {
+   # Ignore requests via proxy caches and badly behaved crawlers
+   if (! (req.http.Via || req.http.User-Agent ~ "(?i)bot" || req.http.X-Purge)) {
+      return(purge); # Couple this with restart in vcl_purge and X-Purge header to avoid loops
+   }
+ }
+}
+
+sub vcl_purge {
+  # Only handle actual PURGE HTTP methods, everything else is discarded
+  if (req.method != "PURGE") {
+    # restart request
+    set req.http.X-Purge = "Yes";
+    return(restart);
+  }
+}
diff --git a/modules/varnish/manifests/config.pp b/modules/varnish/manifests/config.pp
new file mode 100644
index 000000000..a46f799a0
--- /dev/null
+++ b/modules/varnish/manifests/config.pp
@@ -0,0 +1,47 @@
+define varnish::config (
+	$listen = ':6081',
+	$source=undef,
+	$content=undef,
+	$ensure = 'present',
+	$backend = "-s malloc,256m",
+) {
+	if $name != "default" {
+		fail ( "This module cannot setup non-default varnish instances yet." )
+	}
+
+	case $ensure {
+		present: {
+			include varnish::base
+
+			if ! ($source or $content) {
+				fail ( "No configuration found for ${name}" )
+			}
+
+			systemd::override { 'varnish':
+				content  => @("EOF"),
+					[Service]
+					ExecStart=
+					ExecStart=/usr/sbin/varnishd -a ${listen} -T localhost:6082 -f /etc/varnish/${name}.vcl -S /etc/varnish/secret -s ${backend}
+					| EOF
+			}
+
+			$dest = "/etc/varnish/${name}.vcl"
+			if $content {
+				file { "${dest}":
+					ensure  => $ensure,
+					content => $content,
+					notify  => Service["varnish"],
+				}
+			} elsif $source {
+				file { "${dest}":
+					ensure  => $ensure,
+					source  => $source,
+					notify  => Service["varnish"],
+					}
+			}
+		}
+		default: {
+			fail ( "Can only deal with ensure=>present for now" )
+		}
+	}
+}
-- 
2.20.1