couchdb: generate hiera files suitable for plain couchdb + read-only mirrors

5 files changed, 66 insertions, 13 deletions

diff --git a/provider_base/services/_couchdb_master.json b/provider_base/services/_couchdb_master.json
new file mode 100644
index 00000000..20c6f99b
--- /dev/null
+++ b/provider_base/services/_couchdb_master.json
@@ -0,0 +1,8 @@
+//
+// Applied to master couchdb node when there is a single master
+//
+{
+  "couch": {
+    "mode": "master"
+  }
+}
\ No newline at end of file
diff --git a/provider_base/services/_couchdb_mirror.json b/provider_base/services/_couchdb_mirror.json
new file mode 100644
index 00000000..67004c70
--- /dev/null
+++ b/provider_base/services/_couchdb_mirror.json
@@ -0,0 +1,16 @@
+//
+// Applied to all non-master couchdb nodes
+//
+{
+  "stunnel": {
+    "couch_client": "= stunnel_client(nodes[couch.replication.masters.keys], couch.port)"
+  },
+  "couch": {
+    "mode": "mirror",
+    "replication": {
+      // for now, pick the first close one, or the first one.
+      // in the future, maybe use haproxy to balance among all the masters
+      "masters": "= try{pick_node(:couch_master,nodes_near_me['services' => 'couchdb']['couch.master' => true]).pick_fields('domain.internal')} || try{pick_node(:couch_master,nodes_like_me['services' => 'couchdb']['couch.master' => true]).pick_fields('domain.internal')}"
+    }
+  }
+}
\ No newline at end of file
diff --git a/provider_base/services/_couchdb_multimaster.json b/provider_base/services/_couchdb_multimaster.json
new file mode 100644
index 00000000..3eb4835c
--- /dev/null
+++ b/provider_base/services/_couchdb_multimaster.json
@@ -0,0 +1,20 @@
+//
+// Only applied to master couchdb nodes when there are multiple masters
+//
+{
+  "stunnel": {
+    "epmd_server": "= stunnel_server(couch.bigcouch.epmd_port)",
+    "epmd_clients": "= stunnel_client(nodes_like_me[:services => :couchdb], couch.bigcouch.epmd_port)",
+    "ednp_server": "= stunnel_server(couch.bigcouch.ednp_port)",
+    "ednp_clients": "= stunnel_client(nodes_like_me[:services => :couchdb], couch.bigcouch.ednp_port)"
+  },
+  "couch": {
+    "mode": "multimaster",
+    "bigcouch": {
+      "epmd_port": 4369,
+      "ednp_port": 9002,
+      "cookie": "= secret :bigcouch_cookie",
+      "neighbors": "= nodes_like_me['services' => 'couchdb']['couchdb.master' => true].exclude(self).field('domain.full')"
+    }
+  }
+}
diff --git a/provider_base/services/couchdb.json b/provider_base/services/couchdb.json
index 5f1b5381..d75fd8de 100644
--- a/provider_base/services/couchdb.json
+++ b/provider_base/services/couchdb.json
@@ -3,20 +3,11 @@
         "use": true
     },
     "stunnel": {
-        "couch_server": "= stunnel_server(couch.port)",
-        "epmd_server": "= stunnel_server(couch.bigcouch.epmd_port)",
-        "epmd_clients": "= stunnel_client(nodes_like_me[:services => :couchdb], global.services[:couchdb].couch.bigcouch.epmd_port)",
-        "ednp_server": "= stunnel_server(couch.bigcouch.ednp_port)",
-        "ednp_clients": "= stunnel_client(nodes_like_me[:services => :couchdb], global.services[:couchdb].couch.bigcouch.ednp_port)"
+        "couch_server": "= stunnel_server(couch.port)"
     },
     "couch": {
+        "master": false,
         "port": 5984,
-        "bigcouch": {
-            "epmd_port": 4369,
-            "ednp_port": 9002,
-            "cookie": "= secret :bigcouch_cookie",
-            "neighbors": "= nodes_like_me[:services => :couchdb].exclude(self).field('domain.full')"
-        },
         "users": {
             "admin": {
                 "username": "admin",
@@ -49,8 +40,8 @@
                 "salt": "= hex_secret :couch_webapp_password_salt, 128"
             }
         },
-    "webapp": {
-         "nagios_test_pw": "= secret :nagios_test_password"
+        "webapp": {
+            "nagios_test_pw": "= secret :nagios_test_password"
         }
     }
 }
diff --git a/provider_base/services/couchdb.rb b/provider_base/services/couchdb.rb
new file mode 100644
index 00000000..c8f5d8a7
--- /dev/null
+++ b/provider_base/services/couchdb.rb
@@ -0,0 +1,18 @@
+#
+# custom logic for couchdb json resolution
+#
+
+unless nodes_like_me['services' => 'couchdb']['couch.master' => true].any?
+  raise 'node `%s`, environment `%s`: there must be at least one node with couch.master set to `true` for this environment.' % [@node.name, @node.environment]
+end
+
+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
+else
+  apply_partial 'services/_couchdb_mirror.json'
+end
+