Adapt dashboard to show idle and used runners

app/assets/javascripts/dashboard.js

@@ -68,7 +68,7 @@ $(document).on('turbolinks:load', function() {
     _.each(response.docker, function(data) {
       groups.update({
         id: data.id,
-        visible: data.pool_size > 0
+        visible: data.prewarmingPoolSize > 0
       });
     });
   };
@@ -78,26 +78,27 @@ $(document).on('turbolinks:load', function() {
       dataset.add({
         group: data.id,
         x: vis.moment(),
-        y: data.quantity
+        y: data.usedRunners
       });
     });
   };
 
   var updateProgressBar = function(progress_bar, data) {
-    var percentage = Math.min(Math.round(data.quantity / data.pool_size * 100), 100);
+    var percentage = Math.min(Math.round(data.idleRunners / data.prewarmingPoolSize * 100), 100);
     progress_bar.attr({
-      'aria-valuemax': data.pool_size,
-      'aria-valuenow': data.quantity,
+      'aria-valuemax': data.prewarmingPoolSize,
+      'aria-valuenow': data.idleRunners,
       style: 'width: ' + percentage + '%'
     });
-    progress_bar.html(data.quantity);
+    progress_bar.html(data.idleRunners);
   };
 
   var updateTable = function(response) {
     _.each(response.docker, function(data) {
       var row = $('tbody tr[data-id=' + data.id + ']');
-      $('.pool-size', row).html(data.pool_size);
-      var progress_bar = $('.quantity .progress .progress-bar', row);
+      $('.prewarming-pool-size', row).html(data.prewarmingPoolSize);
+      $('.used-runners', row).html(`+ ${data.usedRunners}`);
+      var progress_bar = $('.idle-runners .progress .progress-bar', row);
       updateProgressBar(progress_bar, data);
     });
   };

app/helpers/admin/dashboard_helper.rb

@@ -15,7 +15,18 @@ module Admin
       end
 
       ExecutionEnvironment.order(:id).select(:id, :pool_size).map do |execution_environment|
-        execution_environment.attributes.merge(quantity: pool_size[execution_environment.id])
+        # Fetch the actual values (ID is stored as a symbol) or get an empty hash for merge
+        actual = pool_size[execution_environment.id.to_s.to_sym] || {}
+
+        template = {
+          id: execution_environment.id,
+          prewarmingPoolSize: execution_environment.pool_size,
+          idleRunners: 0,
+          usedRunners: 0,
+        }
+
+        # Existing values in the template get replaced with actual values
+        template.merge(actual)
       end
     end
   end

app/views/admin/dashboard/show.html.slim

@@ -10,33 +10,38 @@ h1 = t('breadcrumbs.dashboard.show')
 h2 Version
 
 div.mb-4
-  = "CodeOcean Release:"
+  = application_name
+  =< t("admin.dashboard.show.release")
+  | :
   pre = Sentry.configuration.release
 
 - if Runner.management_active?
   div.mb-4
     = Runner.strategy_class.name.demodulize
-    =< "Release:"
+    =< t("admin.dashboard.show.release")
+    | :
     pre = Runner.strategy_class.release
 
 h2 Docker
 
 - if Runner.management_active?
-  h3 = t('.current')
+  h3 = t('admin.dashboard.show.current')
   .table-responsive
     table.table
       thead
         tr
           th = t('activerecord.models.execution_environment.one')
           th = t('activerecord.attributes.execution_environment.pool_size')
-          th = t('.quantity')
+          th = t('admin.dashboard.show.idleRunners')
+          th = t('admin.dashboard.show.usedRunners')
       tbody
         - ExecutionEnvironment.order(:name).each do |execution_environment|
           tr data-id=execution_environment.id
             td.name = link_to_if(policy(execution_environment).show?, execution_environment, execution_environment)
-            td.pool-size
-            td.quantity = progress_bar(0)
-  h3 = t('.history')
+            td.prewarming-pool-size
+            td.idle-runners = progress_bar(0)
+            td.used-runners
+  h3 = t('admin.dashboard.show.history')
   #graph
 - else
-  p = t('.inactive')
+  p = t('admin.dashboard.show.inactive')

config/locales/de.yml

@@ -241,10 +241,12 @@ de:
   admin:
     dashboard:
       show:
+        release: Release
         current: Aktuelle Verfügbarkeit
-        history: Verfügbarkeitsverlauf
+        history: Nutzungsverlauf
         inactive: Es ist kein Runner Management aktiv.
-        quantity: Verfügbare Container
+        idleRunners: Freie Runner
+        usedRunners: Reservierte Runner
   application:
     not_authorized: Sie Sind nicht berechtigt, diese Aktion auszuführen.
     welcome:

config/locales/en.yml

@@ -241,10 +241,12 @@ en:
   admin:
     dashboard:
       show:
+        release: Release
         current: Current Availability
-        history: Availability History
+        history: Usage History
         inactive: No runner management is currently enabled.
-        quantity: Available Containers
+        idleRunners: Idle Runners
+        usedRunners: Reserved Runners
   application:
     not_authorized: You are not authorized to perform this action.
     welcome:

lib/runner/strategy/docker_container_pool.rb

@@ -166,7 +166,7 @@ class Runner::Strategy::DockerContainerPool < Runner::Strategy
     url = "#{config[:url]}/docker_container_pool/quantities"
     response = Faraday.get(url)
     pool_size = JSON.parse(response.body)
-    pool_size.transform_keys(&:to_i)
+    pool_size.deep_symbolize_keys
   rescue Faraday::Error => e
     raise Runner::Error::FaradayError.new("Request to DockerContainerPool failed: #{e.inspect}")
   rescue JSON::ParserError => e

lib/runner/strategy/poseidon.rb

@@ -176,7 +176,23 @@ class Runner::Strategy::Poseidon < Runner::Strategy
   end
 
   def self.pool_size
-    {}
+    url = "#{config[:url]}/statistics/execution-environments"
+    Rails.logger.debug { "#{Time.zone.now.getutc.inspect}: Getting statistics from #{url}" }
+    response = http_connection.get url
+    case response.status
+      when 200
+        response_body = parse response
+        response_body
+      else
+        handle_error response
+    end
+  rescue Faraday::Error => e
+    raise Runner::Error::FaradayError.new("Request to Poseidon failed: #{e.inspect}")
+  rescue JSON::ParserError => e
+    # Poseidon should not send invalid json
+    raise Runner::Error::UnexpectedResponse.new("Error parsing response from Poseidon: #{e.message}")
+  ensure
+    Rails.logger.debug { "#{Time.zone.now.getutc.inspect}: Finished getting statistics" }
   end
 
   def self.websocket_header

spec/helpers/admin/dashboard_helper_spec.rb

@@ -14,7 +14,7 @@ describe Admin::DashboardHelper do
       FactoryBot.create(:ruby)
       dcp = instance_double 'docker_container_pool'
       allow(Runner).to receive(:strategy_class).and_return dcp
-      allow(dcp).to receive(:pool_size).and_return([])
+      allow(dcp).to receive(:pool_size).and_return({})
     end
 
     it 'contains an entry for every execution environment' do
@@ -22,11 +22,15 @@ describe Admin::DashboardHelper do
     end
 
     it 'contains the pool size for every execution environment' do
-      expect(docker_data.first.symbolize_keys).to include(:pool_size)
+      expect(docker_data.first.symbolize_keys).to include(:prewarmingPoolSize)
     end
 
-    it 'contains the number of available containers for every execution environment' do
-      expect(docker_data.first).to include(:quantity)
+    it 'contains the number of idle runners for every execution environment' do
+      expect(docker_data.first).to include(:idleRunners)
+    end
+
+    it 'contains the number of used runners for every execution environment' do
+      expect(docker_data.first).to include(:usedRunners)
     end
   end
 end