feat: add user-defined context to notifications

docs/features/notifications.md

@@ -160,9 +160,27 @@ data:
 
 Each condition might use several templates. Typically each template is responsible for generating a service-specific notification part.
 
+### User-defined context
+
+It is possible to define some shared context between all notification templates by setting a top-level YAML document of key-value pairs, which can then be used within templates, like so:
+
+```yaml
+apiVersion: v1
+kind: ConfigMap
+metadata:
+ name: argo-rollouts-notification-configmap
+data:
+ context: |
+ region: east
+ environmentName: staging
+
+ template.a-slack-template-with-context: |
+ message: "Something happened in {{ .context.environmentName }} in the {{ .context.region }} data center!"
+```
+
 ### Notification Metrics
 
 The following prometheus metrics are emitted when notifications are enabled in argo-rollouts.
 - notification_send_success is a counter that measures how many times the notification is sent successfully.
 - notification_send_error is a counter that measures how many times the notification failed to send.
-- notification_send is a histogram that measures performance of sending notification.
+- notification_send is a histogram that measures performance of sending notification.

go.mod

@@ -44,6 +44,7 @@ require (
  google.golang.org/grpc v1.63.2
  google.golang.org/protobuf v1.34.0
  gopkg.in/yaml.v2 v2.4.0
+ gopkg.in/yaml.v3 v3.0.1
  k8s.io/api v0.29.3
  k8s.io/apiextensions-apiserver v0.29.3
  k8s.io/apimachinery v0.29.3
@@ -221,7 +222,6 @@ require (
  gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df // indirect
  gopkg.in/inf.v0 v0.9.1 // indirect
  gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
- gopkg.in/yaml.v3 v3.0.1 // indirect
  k8s.io/cloud-provider v0.0.0 // indirect
  k8s.io/cluster-bootstrap v0.25.8 // indirect
  k8s.io/component-helpers v0.29.3 // indirect

utils/record/record.go

@@ -37,6 +37,7 @@
  rolloutscheme "github.com/argoproj/argo-rollouts/pkg/client/clientset/versioned/scheme"
  "github.com/argoproj/argo-rollouts/utils/annotations"
  logutil "github.com/argoproj/argo-rollouts/utils/log"
+ "gopkg.in/yaml.v3"
 )
 
 func init() {
@@ -318,6 +319,18 @@
  "secrets": secret.Data,
  }
 
+ if contextData, ok := configMap.Data["context"]; ok {
+ var contextMap map[string]string
+ err := yaml.Unmarshal([]byte(contextData), &contextMap)
+ if err != nil {
+ log.Warnf("Failed to unmarshal 'context' key from %s: %v", NotificationConfigMap, err)
+ } else {
+ vars["context"] = contextMap
+ }
+ } else {
+ log.Debugf("The key 'context' is not present in the %s", NotificationConfigMap)
+ }
+
  if arInformer == nil {
  log.Infof("Notification is not set for analysisRun Informer: %s", dest)
  return vars
@@ -340,12 +353,8 @@
 
  }
 
- vars = map[string]any{
- "rollout": obj,
- "analysisRuns": arsObj,
- "time": timeExprs,
- "secrets": secret.Data,
- }
+ vars["analysisRuns"] = arsObj
+
  return vars
  }, nil
  },

utils/record/record_test.go

@@ -509,6 +509,7 @@ func TestNewAPIFactorySettings(t *testing.T) {
  name string
  arInformer arInformerFunc
  rollout v1alpha1.Rollout
+ cm corev1.ConfigMap
  ars []*v1alpha1.AnalysisRun
  expected expectedFunc
  }{
@@ -518,6 +519,7 @@ func TestNewAPIFactorySettings(t *testing.T) {
  return createAnalysisRunInformer(ars)
  },
  rollout: ro,
+ cm: corev1.ConfigMap{},
  ars: ars,
  expected: func(obj map[string]interface{}, ar any) map[string]interface{} {
  return map[string]interface{}{
@@ -534,6 +536,7 @@ func TestNewAPIFactorySettings(t *testing.T) {
  return createAnalysisRunInformer(ars)
  },
  rollout: ro,
+ cm: corev1.ConfigMap{},
  ars: []*v1alpha1.AnalysisRun{
  {
  ObjectMeta: metav1.ObjectMeta{
@@ -560,6 +563,7 @@ func TestNewAPIFactorySettings(t *testing.T) {
  return nil
  },
  rollout: ro,
+ cm: corev1.ConfigMap{},
  ars: nil,
  expected: func(obj map[string]interface{}, ar any) map[string]interface{} {
  return map[string]interface{}{
@@ -575,6 +579,7 @@ func TestNewAPIFactorySettings(t *testing.T) {
  return createAnalysisRunInformer(ars)
  },
  rollout: ro,
+ cm: corev1.ConfigMap{},
  ars: []*v1alpha1.AnalysisRun{
  {
  ObjectMeta: metav1.ObjectMeta{
@@ -595,13 +600,36 @@ func TestNewAPIFactorySettings(t *testing.T) {
  }
  },
  },
+ {
+ name: "Send notification with context",
+ arInformer: func(ars []*v1alpha1.AnalysisRun) argoinformers.AnalysisRunInformer {
+ return nil
+ },
+ rollout: ro,
+ cm: corev1.ConfigMap{
+ ObjectMeta: metav1.ObjectMeta{
+ Name: NotificationConfigMap,
+ Namespace: "argo-rollouts",
+ },
+ Data: map[string]string{"context": "server: foo\nenv: prod"},
+ },
+ ars: nil,
+ expected: func(obj map[string]interface{}, ar any) map[string]interface{} {
+ return map[string]interface{}{
+ "rollout": obj,
+ "time": timeExprs,
+ "secrets": expectedSecrets,
+ "context": map[string]string{"server": "foo", "env": "prod"},
+ }
+ },
+ },
  }
 
  for _, test := range testcase {
  t.Run(test.name, func(t *testing.T) {
 
  settings := NewAPIFactorySettings(test.arInformer(test.ars))
- getVars, err := settings.InitGetVars(nil, nil, &notificationsSecret)
+ getVars, err := settings.InitGetVars(nil, &test.cm, &notificationsSecret)
  require.NoError(t, err)
  if err != nil {
  t.Errorf("Unexpected error: %v", err)