Add CouchDB support

.gitignore

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+.*.sw?

configurator/couchdb.sh

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+#!/bin/bash
+
+# Copyright (C) 2016 wikiwi.io
+#
+# This software may be modified and distributed under the terms
+# of the MIT license. See the LICENSE file for details.
+
+if [ -n "${COUCHDB_STATUS_URL}" ]; then
+echo Configuring couchdb...
+cat <<EOL > /opt/stackdriver/collectd/etc/collectd.d/couchdb.conf
+# This is the monitoring configuration for CouchDB.
+#
+# Adapted from
+# https://raw.githubusercontent.com/Stackdriver/stackdriver-agent-service-configs/master/etc/collectd.d/couchdb.conf
+# for use in a CouchDB 2.x cluster.
+LoadPlugin curl_json
+<Plugin "curl_json">
+    # For example:
+    # <URL "http://user:[email protected]:5984/_node/_local/_stats">
+    <URL "${COUCHDB_STATUS_URL}">
+        Instance "couchdb"
+
+        <Key "couchdb/auth_cache_hits/value">
+            Type "counter"
+            Instance "auth_cache_hits"
+        </Key>
+        <Key "couchdb/auth_cache_misses/value">
+            Type "counter"
+            Instance "auth_cache_misses"
+        </Key>
+        <Key "couchdb/database_reads/value">
+            Type "counter"
+            Instance "database_reads"
+        </Key>
+        <Key "couchdb/database_writes/value">
+            Type "counter"
+            Instance "database_writes"
+        </Key>
+        <Key "couchdb/httpd/bulk_requests/value">
+            Type "counter"
+            Instance "httpd/bulk_requests"
+        </Key>
+        <Key "couchdb/httpd/clients_requesting_changes/value">
+            Type "counter"
+            Instance "httpd/clients_requesting_changes"
+        </Key>
+        <Key "couchdb/httpd_request_methods/COPY/value">
+            Type "counter"
+            Instance "httpd_request_methods/COPY"
+        </Key>
+        <Key "couchdb/httpd_request_methods/DELETE/value">
+            Type "counter"
+            Instance "httpd_request_methods/DELETE"
+        </Key>
+        <Key "couchdb/httpd_request_methods/GET/value">
+            Type "counter"
+            Instance "httpd_request_methods/GET"
+        </Key>
+        <Key "couchdb/httpd_request_methods/HEAD/value">
+            Type "counter"
+            Instance "httpd_request_methods/HEAD"
+        </Key>
+        <Key "couchdb/httpd_request_methods/OPTIONS/value">
+            Type "counter"
+            Instance "httpd_request_methods/OPTIONS"
+        </Key>
+        <Key "couchdb/httpd_request_methods/POST/value">
+            Type "counter"
+            Instance "httpd_request_methods/POST"
+        </Key>
+        <Key "couchdb/httpd_request_methods/PUT/value">
+            Type "counter"
+            Instance "httpd_request_methods/PUT"
+        </Key>
+        <Key "couchdb/httpd/requests/value">
+            Type "counter"
+            Instance "httpd/requests"
+        </Key>
+        <Key "couchdb/httpd_status_codes/200/value">
+            Type "counter"
+            Instance "httpd_status_codes/200"
+        </Key>
+        <Key "couchdb/httpd_status_codes/201/value">
+            Type "counter"
+            Instance "httpd_status_codes/201"
+        </Key>
+        <Key "couchdb/httpd_status_codes/202/value">
+            Type "counter"
+            Instance "httpd_status_codes/202"
+        </Key>
+        <Key "couchdb/httpd_status_codes/301/value">
+            Type "counter"
+            Instance "httpd_status_codes/301"
+        </Key>
+        <Key "couchdb/httpd_status_codes/304/value">
+            Type "counter"
+            Instance "httpd_status_codes/304"
+        </Key>
+        <Key "couchdb/httpd_status_codes/400/value">
+            Type "counter"
+            Instance "httpd_status_codes/400"
+        </Key>
+        <Key "couchdb/httpd_status_codes/401/value">
+            Type "counter"
+            Instance "httpd_status_codes/401"
+        </Key>
+        <Key "couchdb/httpd_status_codes/403/value">
+            Type "counter"
+            Instance "httpd_status_codes/403"
+        </Key>
+        <Key "couchdb/httpd_status_codes/404/value">
+            Type "counter"
+            Instance "httpd_status_codes/404"
+        </Key>
+        <Key "couchdb/httpd_status_codes/405/value">
+            Type "counter"
+            Instance "httpd_status_codes/405"
+        </Key>
+        <Key "couchdb/httpd_status_codes/409/value">
+            Type "counter"
+            Instance "httpd_status_codes/409"
+        </Key>
+        <Key "couchdb/httpd_status_codes/412/value">
+            Type "counter"
+            Instance "httpd_status_codes/412"
+        </Key>
+        <Key "couchdb/httpd_status_codes/500/value">
+            Type "counter"
+            Instance "httpd_status_codes/500"
+        </Key>
+        <Key "couchdb/httpd/temporary_view_reads/value">
+            Type "counter"
+            Instance "httpd/temporary_view_reads"
+        </Key>
+        <Key "couchdb/httpd/view_reads/value">
+            Type "counter"
+            Instance "httpd/view_reads"
+        </Key>
+        <Key "couchdb/open_databases/value">
+            Type "gauge"
+            Instance "open_databases"
+        </Key>
+        <Key "couchdb/open_os_files/value">
+            Type "gauge"
+            Instance "open_os_files"
+        </Key>
+        # couchdb/request_time is a histogram. The values I'd most like
+        # to export as metrics --
+        # couchdb/request_time/value/percentile[{50,75,90,95,99,999}] --
+        # are not available. Hence, we will not export anything from
+        # couchdb/request_time.
+
+        <Key "couch_replicator/checkpoints/failure/value">
+            Type "counter"
+            Instance "replicator/checkpoints/failure"
+        </Key>
+        <Key "couch_replicator/checkpoints/success/value">
+            Type "counter"
+            Instance "replicator/checkpoints/success"
+        </Key>
+        <Key "couch_replicator/cluster_is_stable/value">
+            Type "gauge"
+            Instance "replicator/cluster_is_stable"
+        </Key>
+        <Key "couch_replicator/requests/value">
+            Type "counter"
+            Instance "replicator/requests"
+        </Key>
+        <Key "couch_replicator/responses/failure/value">
+            Type "counter"
+            Instance "replicator/responses/failure"
+        </Key>
+        <Key "couch_replicator/responses/success/value">
+            Type "counter"
+            Instance "replicator/responses/success"
+        </Key>
+    </URL>
+</Plugin>
+
+LoadPlugin match_regex
+LoadPlugin target_set
+LoadPlugin target_replace
+<Chain "curl_json_couchdb">
+    <Rule "rewrite_curl_json_to_couchdb">
+        <Match regex>
+            Plugin "^curl_json$"
+            PluginInstance "^couchdb.*$"
+        </Match>
+        <Target "replace">
+            PluginInstance "^couchdb" ""
+        </Target>
+        <Target "set">
+            Plugin "couchdb"
+            MetaData "stackdriver_metric_type" "custom.googleapis.com/couchdb/%{type_instance}"
+            MetaData "label:service_name" "couchdb"
+        </Target>
+    </Rule>
+    <Rule "rewrite_empty_plugininstance">
+        <Match regex>
+            PluginInstance "^$"
+        </Match>
+        <Target "set">
+            PluginInstance "localhost"
+        </Target>
+    </Rule>
+    <Rule "go_back">
+        Target "return"
+    </Rule>
+</Chain>
+
+<Chain "PreCache">
+    <Rule "jump_to_curl_json_couchdb">
+        <Target "jump">
+            Chain "curl_json_couchdb"
+        </Target>
+    </Rule>
+</Chain>
+PreCacheChain "PreCache"
+EOL
+fi