Introduced empty/error UX states to environments monitoring.

7 files changed, 130 insertions, 28 deletions

diff --git a/app/assets/javascripts/monitoring/prometheus_graph.js b/app/assets/javascripts/monitoring/prometheus_graph.js
index a6ffa0f59de..d82a4eb9642 100644
--- a/app/assets/javascripts/monitoring/prometheus_graph.js
+++ b/app/assets/javascripts/monitoring/prometheus_graph.js
@@ -6,7 +6,10 @@ import statusCodes from '~/lib/utils/http_status';
 import { formatRelevantDigits } from '~/lib/utils/number_utils';
 import '../flash';
 
+const prometheusContainer = '.prometheus-container';
+const prometheusParentGraphContainer = '.prometheus-graphs';
 const prometheusGraphsContainer = '.prometheus-graph';
+const prometheusStatesContainer = '.prometheus-state';
 const metricsEndpoint = 'metrics.json';
 const timeFormat = d3.time.format('%H:%M');
 const dayFormat = d3.time.format('%b %e, %a');
@@ -14,19 +17,30 @@ const bisectDate = d3.bisector(d => d.time).left;
 const extraAddedWidthParent = 100;
 
 class PrometheusGraph {
-
   constructor() {
-    this.margin = { top: 80, right: 180, bottom: 80, left: 100 };
-    this.marginLabelContainer = { top: 40, right: 0, bottom: 40, left: 0 };
-    const parentContainerWidth = $(prometheusGraphsContainer).parent().width() +
-    extraAddedWidthParent;
-    this.originalWidth = parentContainerWidth;
-    this.originalHeight = 330;
-    this.width = parentContainerWidth - this.margin.left - this.margin.right;
-    this.height = this.originalHeight - this.margin.top - this.margin.bottom;
-    this.backOffRequestCounter = 0;
-    this.configureGraph();
-    this.init();
+    const $prometheusContainer = $(prometheusContainer);
+    const hasMetrics = $prometheusContainer.data('has-metrics');
+    this.docLink = $prometheusContainer.data('doc-link');
+    this.integrationLink = $prometheusContainer.data('prometheus-integration');
+
+    $(document).ajaxError(() => {});
+
+    if (hasMetrics) {
+      this.margin = { top: 80, right: 180, bottom: 80, left: 100 };
+      this.marginLabelContainer = { top: 40, right: 0, bottom: 40, left: 0 };
+      const parentContainerWidth = $(prometheusGraphsContainer).parent().width() +
+      extraAddedWidthParent;
+      this.originalWidth = parentContainerWidth;
+      this.originalHeight = 330;
+      this.width = parentContainerWidth - this.margin.left - this.margin.right;
+      this.height = this.originalHeight - this.margin.top - this.margin.bottom;
+      this.backOffRequestCounter = 0;
+      this.configureGraph();
+      this.init();
+    } else {
+      this.state = '.js-getting-started';
+      this.updateState();
+    }
   }
 
   createGraph() {
@@ -40,8 +54,19 @@ class PrometheusGraph {
 
   init() {
     this.getData().then((metricsResponse) => {
-      if (Object.keys(metricsResponse).length === 0) {
-        new Flash('Empty metrics', 'alert');
+      let enoughData = true;
+      Object.keys(metricsResponse.metrics).forEach((key) => {
+        let currentKey;
+        if (key === 'cpu_values' || key === 'memory_values') {
+          currentKey = metricsResponse.metrics[key];
+          if (Object.keys(currentKey).length === 0) {
+            enoughData = false;
+          }
+        }
+      });
+      if (!enoughData) {
+        this.state = '.js-loading';
+        this.updateState();
       } else {
         this.transformData(metricsResponse);
         this.createGraph();
@@ -345,14 +370,17 @@ class PrometheusGraph {
       }
       return resp.metrics;
     })
-    .catch(() => new Flash('An error occurred while fetching metrics.', 'alert'));
+    .catch(() => {
+      this.state = '.js-unable-to-connect';
+      this.updateState();
+    });
   }
 
   transformData(metricsResponse) {
     Object.keys(metricsResponse.metrics).forEach((key) => {
       if (key === 'cpu_values' || key === 'memory_values') {
         const metricValues = (metricsResponse.metrics[key])[0];
-        if (typeof metricValues !== 'undefined') {
+        if (metricValues !== undefined) {
           this.graphSpecificProperties[key].data = metricValues.values.map(metric => ({
             time: new Date(metric[0] * 1000),
             value: metric[1],
@@ -361,6 +389,13 @@ class PrometheusGraph {
       }
     });
   }
+
+  updateState() {
+    const $statesContainer = $(prometheusStatesContainer);
+    $(prometheusParentGraphContainer).hide();
+    $(`${this.state}`, $statesContainer).removeClass('hidden');
+    $(prometheusStatesContainer).show();
+  }
 }
 
 export default PrometheusGraph;
diff --git a/app/assets/stylesheets/pages/environments.scss b/app/assets/stylesheets/pages/environments.scss
index 6faa3794c83..72e7d42858d 100644
--- a/app/assets/stylesheets/pages/environments.scss
+++ b/app/assets/stylesheets/pages/environments.scss
@@ -233,6 +233,15 @@
   stroke-width: 1;
 }
 
+.prometheus-state {
+  margin-top: 10px;
+  display: none;
+
+  .state-button-section {
+    margin-top: 10px;
+  }
+}
+
 .environments-actions {
   .external-url,
   .monitoring-url,
diff --git a/app/views/projects/environments/_metrics_button.html.haml b/app/views/projects/environments/_metrics_button.html.haml
index e27281d6917..b4102fcf103 100644
--- a/app/views/projects/environments/_metrics_button.html.haml
+++ b/app/views/projects/environments/_metrics_button.html.haml
@@ -1,6 +1,6 @@
 - environment = local_assigns.fetch(:environment)
 
-- return unless environment.has_metrics? && can?(current_user, :read_environment, environment)
+- return unless can?(current_user, :read_environment, environment)
 
 = link_to environment_metrics_path(environment), title: 'See metrics', class: 'btn metrics-button' do
   = icon('area-chart')
diff --git a/app/views/projects/environments/metrics.html.haml b/app/views/projects/environments/metrics.html.haml
index 92dc58cd38d..2e54af698aa 100644
--- a/app/views/projects/environments/metrics.html.haml
+++ b/app/views/projects/environments/metrics.html.haml
@@ -5,7 +5,7 @@
   = page_specific_javascript_bundle_tag('monitoring')
 = render "projects/pipelines/head"
 
-%div{ class: container_class }
+.prometheus-container{ class: container_class, 'data-has-metrics': "#{@environment.has_metrics?}" }
   .top-area
     .row
       .col-sm-6
@@ -16,13 +16,68 @@
       .col-sm-6
         .nav-controls
           = render 'projects/deployments/actions', deployment: @environment.last_deployment
-  .row
-    .col-sm-12
-      %h4
-        CPU utilization
-      %svg.prometheus-graph{ 'graph-type' => 'cpu_values' }
-  .row
-    .col-sm-12
-      %h4
-        Memory usage
-      %svg.prometheus-graph{ 'graph-type' => 'memory_values' }
+  .prometheus-state
+    .js-getting-started.hidden
+      .row
+        .col-md-4.col-md-offset-4.state-svg
+          = render "shared/empty_states/monitoring/getting_started.svg"
+      .row
+        .col-md-6.col-md-offset-3
+          %h4.text-center.state-title
+            Get started with performance monitoring
+      .row
+        .col-md-6.col-md-offset-3
+          .description-text.text-center.state-description
+            Stay updated about the performance and health of your environment by configuring Prometheus to monitor your deployments.
+            = link_to help_page_path('administration/monitoring/prometheus/index.md') do
+              Learn more about performance monitoring
+      .row.state-button-section
+        .col-md-4.col-md-offset-4.text-center.state-button
+          = link_to edit_namespace_project_service_path(@project.namespace, @project, 'prometheus'), class: 'btn btn-success' do
+            Configure Prometheus
+    .js-loading.hidden
+      .row
+        .col-md-4.col-md-offset-4.state-svg
+          = render "shared/empty_states/monitoring/loading.svg"
+      .row
+        .col-md-6.col-md-offset-3
+          %h4.text-center.state-title
+            Waiting for performance data
+      .row
+        .col-md-6.col-md-offset-3
+          .description-text.text-center.state-description
+            Creating graphs uses the data from the Prometheus server. If this takes a long time, ensure that data is available.
+      .row.state-button-section
+        .col-md-4.col-md-offset-4.text-center.state-button
+          = link_to help_page_path('administration/monitoring/prometheus/index.md'), class: 'btn btn-success' do
+            View documentation
+    .js-unable-to-connect.hidden
+      .row
+        .col-md-4.col-md-offset-4.state-svg
+          = render "shared/empty_states/monitoring/unable_to_connect.svg"
+      .row
+        .col-md-6.col-md-offset-3
+          %h4.text-center.state-title
+            Unable to connect to Prometheus server
+      .row
+        .col-md-6.col-md-offset-3
+          .description-text.text-center.state-description
+            Ensure connectivity is available from the GitLab server to the
+            = link_to edit_namespace_project_service_path(@project.namespace, @project, 'prometheus') do
+              Prometheus server
+      .row.state-button-section
+        .col-md-4.col-md-offset-4.text-center.state-button
+          = link_to help_page_path('administration/monitoring/prometheus/index.md'), class:'btn btn-success' do
+            View documentation
+
+  .prometheus-graphs
+    .row
+      .col-sm-12
+        %h4
+          CPU utilization
+        %svg.prometheus-graph{ 'graph-type' => 'cpu_values' }
+    .row
+      .col-sm-12
+        %h4
+          Memory usage
+        %svg.prometheus-graph{ 'graph-type' => 'memory_values' }
diff --git a/app/views/shared/empty_states/monitoring/_getting_started.svg b/app/views/shared/empty_states/monitoring/_getting_started.svg
new file mode 100644
index 00000000000..db7a1c2e708
--- /dev/null
+++ b/app/views/shared/empty_states/monitoring/_getting_started.svg
@@ -0,0 +1 @@
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\ No newline at end of file
diff --git a/app/views/shared/empty_states/monitoring/_loading.svg b/app/views/shared/empty_states/monitoring/_loading.svg
new file mode 100644
index 00000000000..6bbd7a6c5b9
--- /dev/null
+++ b/app/views/shared/empty_states/monitoring/_loading.svg
@@ -0,0 +1 @@
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