adding --connect option and use it

- when retrieving metrics it will now pull only local metrics rather than all nodes in the reiplca set. To revert this behavior you can add `--connect replica_set`

- control of connection type for metric gatherering scripts

Signed-off-by: Ben Abrams <[email protected]>

Author: majormoses

CHANGELOG.md

@@ -4,8 +4,11 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 This CHANGELOG follows the format located [here](https://github.com/sensu-plugins/community/blob/master/HOW_WE_CHANGELOG.md)
 
 ## [Unreleased]
-### Fixed
-- Ensure Server status/Replicaset stats are current host's, not host from read preference (@naemon)
+### Breaking Changes
+- `--connect` now defaults to `:direct` so that Server status/Replicaset stats are current host'srather than all metrics in the replica set (@naemon)
+
+### Added
+- exposed `--connect` which controls how it connects. Valid values are `:direct`, `:replica_set` (mongo client default), and `:sharded`. (@naemon) (@majormoses)
 
 ## [2.0.2] - 2018-03-17
 ### Fixed

bin/metrics-mongodb-replication.rb

@@ -103,6 +103,13 @@ class MongoDB < Sensu::Plugin::Metric::CLI::Graphite
          long: '--debug',
          default: false
 
+  option :connect,
+         description: 'The connection method to use',
+         long: `--connect`,
+         in: %i[direct replica_set sharded],
+         proc: proc(&:to_sym),
+         default: :direct
+
   def get_mongo_doc(command)
     rs = @db.command(command)
     unless rs.successful?

bin/metrics-mongodb.rb

@@ -99,6 +99,13 @@ class MongoDB < Sensu::Plugin::Metric::CLI::Graphite
          long: '--require-master',
          default: false
 
+  option :connect,
+         description: 'The connection method to use',
+         long: `--connect`,
+         in: %i[direct replica_set sharded],
+         proc: proc(&:to_sym),
+         default: :direct
+
   def run
     Mongo::Logger.logger.level = Logger::FATAL
     @debug = config[:debug]

lib/sensu-plugins-mongodb/metrics.rb

@@ -369,14 +369,15 @@ def get_mongo_client(db_name)
       ssl_key = @config[:ssl_key]
       ssl_ca_cert = @config[:ssl_ca_cert]
       ssl_verify = @config[:ssl_verify]
+      connect = @config[:connect]
 
       if Gem.loaded_specs['mongo'].version < Gem::Version.new('2.0.0')
         MongoClient.new(host, port)
       else
         address_str = "#{host}:#{port}"
         client_opts = {}
         client_opts[:database] = db_name
-        client_opts[:connect] = :direct
+        client_opts[:connect] = connect
         unless db_user.nil?
           client_opts[:user] = db_user
           client_opts[:password] = db_password