Show Elasticsearch in performance bar

In https://gitlab.com/gitlab-org/gitlab/-/merge_requests/32822 we added
instrumentation for Elasticsearch. This follows the same pattern used in
lib/peek/views/gitaly.rb to display call counts, duration and extra
details in the performance bar.

See https://gitlab.com/gitlab-org/gitlab/-/issues/214279

app/assets/javascripts/performance_bar/components/performance_bar_app.vue

@@ -57,6 +57,11 @@ export default {
       header: s__('PerformanceBar|Redis calls'),
       keys: ['cmd'],
     },
+    {
+      metric: 'es',
+      header: s__('PerformanceBar|Elasticsearch calls'),
+      keys: ['request', 'body'],
+    },
     {
       metric: 'total',
       header: s__('PerformanceBar|Frontend resources'),

config/initializers/peek.rb

@@ -9,6 +9,7 @@ Peek.into Peek::Views::Host
 Peek.into Peek::Views::ActiveRecord
 Peek.into Peek::Views::Gitaly
 Peek.into Peek::Views::RedisDetailed
+Peek.into Peek::Views::Elasticsearch
 Peek.into Peek::Views::Rugged
 Peek.into Peek::Views::BulletDetailed if defined?(Bullet)
 

ee/spec/lib/peek/views/elasticsearch_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+# We don't want to interact with Elasticsearch in GitLab FOSS so we test
+# this in ee/ only. The code exists in FOSS and won't do anything.
+
+describe Peek::Views::Elasticsearch, :elastic, :request_store do
+  before do
+    allow(::Gitlab::PerformanceBar).to receive(:enabled_for_request?).and_return(true)
+    ensure_elasticsearch_index!
+  end
+
+  describe '#results' do
+    let(:results) { described_class.new.results }
+
+    it 'includes performance details' do
+      expect(results[:calls]).to be > 0
+      expect(results[:duration]).to be_kind_of(String)
+      expect(results[:details].last[:method]).to eq("POST")
+      expect(results[:details].last[:path]).to eq("gitlab-test/_refresh")
+    end
+  end
+end

lib/peek/views/elasticsearch.rb

+# frozen_string_literal: true
+
+module Peek
+  module Views
+    class Elasticsearch < DetailedView
+      DEFAULT_THRESHOLDS = {
+        calls: 5,
+        duration: 1000,
+        individual_call: 1000
+      }.freeze
+
+      THRESHOLDS = {
+        production: {
+          calls: 5,
+          duration: 1000,
+          individual_call: 1000
+        }
+      }.freeze
+
+      def key
+        'es'
+      end
+
+      def self.thresholds
+        @thresholds ||= THRESHOLDS.fetch(Rails.env.to_sym, DEFAULT_THRESHOLDS)
+      end
+
+      private
+
+      def duration
+        ::Gitlab::Instrumentation::ElasticsearchTransport.query_time * 1000
+      end
+
+      def calls
+        ::Gitlab::Instrumentation::ElasticsearchTransport.get_request_count
+      end
+
+      def call_details
+        ::Gitlab::Instrumentation::ElasticsearchTransport.detail_store
+      end
+
+      def format_call_details(call)
+        super.merge(request: "#{call[:method]} #{call[:path]}")
+      end
+    end
+  end
+end

locale/gitlab.pot

@@ -15478,6 +15478,9 @@ msgstr ""
 msgid "PerformanceBar|Download"
 msgstr ""
 
+msgid "PerformanceBar|Elasticsearch calls"
+msgstr ""
+
 msgid "PerformanceBar|Frontend resources"
 msgstr ""