From a54b82ff7cdae2e44bc3c159473ca03e283f0746 Mon Sep 17 00:00:00 2001
From: elijah <elijah@riseup.net>
Date: Fri, 22 Aug 2014 02:20:13 -0700
Subject: default to multimaster if no nodes are defined as master

---
 provider_base/services/couchdb.rb | 62 ++++++++++++++++++++++++++++++++-------
 1 file changed, 52 insertions(+), 10 deletions(-)

(limited to 'provider_base')

diff --git a/provider_base/services/couchdb.rb b/provider_base/services/couchdb.rb
index 81f366e1..3bee3a67 100644
--- a/provider_base/services/couchdb.rb
+++ b/provider_base/services/couchdb.rb
@@ -1,18 +1,60 @@
+#######################################################################
+###
+### NOTE!
+###
+###  Currently, mirrors do not work! The only thing that works is all
+###  nodes multimaster or a single master.
+###
+#######################################################################
 #
 # custom logic for couchdb json resolution
+# ============================================
+#
+# There are three modes for a node:
+#
+# Multimaster
+# -----------
+#
+#    Multimaster uses bigcouch (soon to use couchdb in replication mode
+#    similar to bigcouch).
+#
+#    Use "multimaster" mode when:
+#
+#     * multiple nodes are marked couch.master
+#     * OR no nodes are marked couch.master
+#
+# Master
+# ------
+#
+#    Master uses plain couchdb that is readable and writable.
+#
+#    Use "master" mode when:
+#
+#     * Exactly one node, this one, is marked as master.
+#
+# Mirror
+# ------
+#
+#    Mirror creates a read-only copy of the database. It uses plain coucdhb
+#    with legacy couchdb replication (http based).
+#
+#    This does not currently work, because http replication can't handle
+#    the number of user databases.
+#
+#    Use "mirror" mode when:
+#
+#     * some nodes are marked couch.master
+#     * AND this node is not a master
 #
 
-unless nodes_like_me['services' => 'couchdb']['couch.master' => true].any?
-  error('there must be at least one node with couch.master set to `true` for environment `%s`.' % @node.environment)
-end
+master_count = nodes_like_me['services' => 'couchdb']['couch.master' => true].size
 
-if couch.master
-  if nodes_like_me['services' => 'couchdb']['couch.master' => true].size > 1
-    apply_partial 'services/_couchdb_multimaster.json'
-  else
-    apply_partial 'services/_couchdb_master.json'
-  end
+if master_count == 0
+  apply_partial 'services/_couchdb_multimaster.json'
+elsif couch.master && master_count > 1
+  apply_partial 'services/_couchdb_multimaster.json'
+elsif couch.master && master_count == 1
+  apply_partial 'services/_couchdb_master.json'
 else
   apply_partial 'services/_couchdb_mirror.json'
 end
-
-- 
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