From: Grant Slater <git@firefishy.com>
Date: Wed, 18 Dec 2013 12:24:07 +0000 (+0000)
Subject: Tilecache: breakout render parents to avoid squid roundrobin DNS issue
X-Git-Url: https://git.openstreetmap.org/chef.git/commitdiff_plain/9dce3290df98d37eafe424fee505bde9a7384862

Tilecache: breakout render parents to avoid squid roundrobin DNS issue
---

diff --git a/cookbooks/tilecache/templates/default/squid.conf.erb b/cookbooks/tilecache/templates/default/squid.conf.erb
index 5ddd3d4ca..5f76aec8b 100644
--- a/cookbooks/tilecache/templates/default/squid.conf.erb
+++ b/cookbooks/tilecache/templates/default/squid.conf.erb
@@ -45,13 +45,16 @@ cache_peer trogdor.openstreetmap.org sibling 3128 3130
 cache_peer nadder-01.openstreetmap.org sibling 3128 3130 proxy-only
 cache_peer nadder-02.openstreetmap.org sibling 3128 3130 proxy-only
 <% end -%>
-cache_peer <%= node[:tilecache][:tile_parent] %> parent 80 0 no-query originserver name=osmtileAccel login=PASS connect-timeout=60 no-digest weight=1000
-cache_peer render.openstreetmap.org parent 80 0 no-query originserver name=osmtileAccelBackup login=PASS connect-timeout=60 no-digest weight=10
 
+#Primary Parent
+cache_peer <%= node[:tilecache][:tile_parent] %> parent 80 0 no-query originserver name=osmtileAccel login=PASS connect-timeout=60 no-digest weight=1000
 cache_peer_access osmtileAccel allow osmtile_sites
-cache_peer_access osmtileAccelBackup allow osmtile_sites
-cache_peer_access osmtileAccel deny all
-cache_peer_access osmtileAccelBackup deny all
+
+#Backup Parents
+<% @caches.each do |cache| -%>
+cache_peer <%= cache.hostname %>.render.openstreetmap.org parent 80 0 no-query originserver name=osmtileAccelBackup<%= cache.hostname %> login=PASS connect-timeout=60 no-digest weight=10
+cache_peer_access osmtileAccelBackup<%= cache.hostname %> allow osmtile_sites
+<% end -%>
 
 #----------------------------------
 #Create an unlimited pool for cache IP addresses