Support EnvFrom

pkg/controller/operators/olm/overrides/config.go

@@ -16,7 +16,7 @@ type operatorConfig struct {
 	logger *logrus.Logger
 }
 
-func (o *operatorConfig) GetConfigOverrides(ownerCSV ownerutil.Owner) (envVarOverrides []corev1.EnvVar, volumeOverrides []corev1.Volume, volumeMountOverrides []corev1.VolumeMount, tolerationOverrides []corev1.Toleration, resourcesOverride *corev1.ResourceRequirements, nodeSelectorOverride map[string]string, affinity *corev1.Affinity, annotations map[string]string, err error) {
+func (o *operatorConfig) GetConfigOverrides(ownerCSV ownerutil.Owner) (envVarOverrides []corev1.EnvVar, envFromOverrides []corev1.EnvFromSource, volumeOverrides []corev1.Volume, volumeMountOverrides []corev1.VolumeMount, tolerationOverrides []corev1.Toleration, resourcesOverride *corev1.ResourceRequirements, nodeSelectorOverride map[string]string, affinity *corev1.Affinity, annotations map[string]string, err error) {
 	list, listErr := o.lister.OperatorsV1alpha1().SubscriptionLister().Subscriptions(ownerCSV.GetNamespace()).List(labels.Everything())
 	if listErr != nil {
 		err = fmt.Errorf("failed to list subscription namespace=%s - %v", ownerCSV.GetNamespace(), listErr)
@@ -35,6 +35,7 @@ func (o *operatorConfig) GetConfigOverrides(ownerCSV ownerutil.Owner) (envVarOve
 	}
 
 	envVarOverrides = owner.Spec.Config.Env
+	envFromOverrides = owner.Spec.Config.EnvFrom
 	volumeOverrides = owner.Spec.Config.Volumes
 	volumeMountOverrides = owner.Spec.Config.VolumeMounts
 	tolerationOverrides = owner.Spec.Config.Tolerations

pkg/controller/operators/olm/overrides/initializer.go

@@ -45,7 +45,7 @@ func (d *DeploymentInitializer) initialize(ownerCSV ownerutil.Owner, deployment
 	var envVarOverrides, proxyEnvVar, merged []corev1.EnvVar
 	var err error
 
-	envVarOverrides, volumeOverrides, volumeMountOverrides, tolerationOverrides, resourcesOverride, nodeSelectorOverride, affinity, annotations, err := d.config.GetConfigOverrides(ownerCSV)
+	envVarOverrides, envFromOverrides, volumeOverrides, volumeMountOverrides, tolerationOverrides, resourcesOverride, nodeSelectorOverride, affinity, annotations, err := d.config.GetConfigOverrides(ownerCSV)
 	if err != nil {
 		err = fmt.Errorf("failed to get subscription pod configuration - %v", err)
 		return err
@@ -72,6 +72,10 @@ func (d *DeploymentInitializer) initialize(ownerCSV ownerutil.Owner, deployment
 		return fmt.Errorf("failed to inject proxy env variable(s) into deployment spec name=%s - %v", deployment.Name, err)
 	}
 
+	if err := inject.InjectEnvFromIntoDeployment(podSpec, envFromOverrides); err != nil {
+		return fmt.Errorf("failed to inject envFrom variable(s) into deployment spec name=%s - %v", deployment.Name, err)
+	}
+
 	if err = inject.InjectVolumesIntoDeployment(podSpec, volumeOverrides); err != nil {
 		return fmt.Errorf("failed to inject volume(s) into deployment spec name=%s - %v", deployment.Name, err)
 	}

pkg/controller/operators/olm/overrides/inject/inject.go

@@ -62,6 +62,45 @@ func mergeEnvVars(containerEnvVars []corev1.EnvVar, newEnvVars []corev1.EnvVar)
 	return merged
 }
 
+// InjectEnvFromIntoDeployment injects the envFrom variables
+// into the container(s) of the given PodSpec.
+//
+// If any Container in PodSpec already defines an envFrom variable
+// as any of the provided envFrom then it will be overwritten.
+func InjectEnvFromIntoDeployment(podSpec *corev1.PodSpec, envFromVars []corev1.EnvFromSource) error {
+	if podSpec == nil {
+		return errors.New("no pod spec provided")
+	}
+
+	for i := range podSpec.Containers {
+		container := &podSpec.Containers[i]
+		container.EnvFrom = mergeEnvFromVars(container.EnvFrom, envFromVars)
+	}
+
+	return nil
+}
+
+func mergeEnvFromVars(containerEnvFromVars []corev1.EnvFromSource, newEnvFromVars []corev1.EnvFromSource) []corev1.EnvFromSource {
+	merged := containerEnvFromVars
+
+	for _, newEnvFromVar := range newEnvFromVars {
+		if !findEnvFromVar(containerEnvFromVars, newEnvFromVar) {
+			merged = append(merged, newEnvFromVar)
+		}
+	}
+
+	return merged
+}
+
+func findEnvFromVar(envFromVar []corev1.EnvFromSource, newEnvFromVar corev1.EnvFromSource) bool {
+	for i := range envFromVar {
+		if reflect.DeepEqual(envFromVar[i], newEnvFromVar) {
+			return true
+		}
+	}
+	return false
+}
+
 // InjectVolumesIntoDeployment injects the provided Volumes
 // into the container(s) of the given PodSpec.
 //

pkg/controller/operators/olm/overrides/inject/inject_test.go

@@ -30,6 +30,26 @@ var (
 		},
 	}
 
+	defaultEnvFromVars = []corev1.EnvFromSource{
+		{
+			Prefix: "test",
+		},
+		{
+			ConfigMapRef: &corev1.ConfigMapEnvSource{
+				LocalObjectReference: corev1.LocalObjectReference{
+					Name: "configmapForTest",
+				},
+			},
+		},
+		{
+			SecretRef: &corev1.SecretEnvSource{
+				LocalObjectReference: corev1.LocalObjectReference{
+					Name: "secretForTest",
+				},
+			},
+		},
+	}
+
 	defaultVolumeMounts = []corev1.VolumeMount{
 		{
 			Name:      "foo",
@@ -526,6 +546,171 @@ func TestInjectEnvIntoDeployment(t *testing.T) {
 	}
 }
 
+func TestInjectEnvFromIntoDeployment(t *testing.T) {
+	tests := []struct {
+		name       string
+		podSpec    *corev1.PodSpec
+		envFromVar []corev1.EnvFromSource
+		expected   *corev1.PodSpec
+	}{
+		{
+			// PodSpec has one container and `EnvFrom` is empty.
+			// Expected: All env variable(s) specified are injected.
+			name: "WithContainerHasNoEnvFromVar",
+			podSpec: &corev1.PodSpec{
+				Containers: []corev1.Container{
+					{},
+				},
+			},
+			envFromVar: defaultEnvFromVars,
+			expected: &corev1.PodSpec{
+				Containers: []corev1.Container{
+					{
+						EnvFrom: defaultEnvFromVars,
+					},
+				},
+			},
+		},
+		{
+			// PodSpec has one container and it has overlapping envFrom var(s).
+			// Expected: existing duplicate env vars won't be appended in the envFrom.
+			name: "WithContainerHasOverlappingEnvFromVar",
+			podSpec: &corev1.PodSpec{
+				Containers: []corev1.Container{
+					{
+						EnvFrom: []corev1.EnvFromSource{
+							{
+								Prefix: "test",
+							},
+							{
+								ConfigMapRef: &corev1.ConfigMapEnvSource{
+									LocalObjectReference: corev1.LocalObjectReference{
+										Name: "configmapForTest",
+									},
+								},
+							},
+							{
+								SecretRef: &corev1.SecretEnvSource{
+									LocalObjectReference: corev1.LocalObjectReference{
+										Name: "secretForTest",
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+			envFromVar: defaultEnvFromVars,
+			expected: &corev1.PodSpec{
+				Containers: []corev1.Container{
+					{
+						EnvFrom: []corev1.EnvFromSource{
+							{
+								Prefix: "test",
+							},
+							{
+								ConfigMapRef: &corev1.ConfigMapEnvSource{
+									LocalObjectReference: corev1.LocalObjectReference{
+										Name: "configmapForTest",
+									},
+								},
+							},
+							{
+								SecretRef: &corev1.SecretEnvSource{
+									LocalObjectReference: corev1.LocalObjectReference{
+										Name: "secretForTest",
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+		{
+			// PodSpec has one container and it has non overlapping envFrom var(s).
+			// Expected: existing non overlapping env vars are intact.
+			name: "WithContainerHasNonOverlappingEnvFromVar",
+			podSpec: &corev1.PodSpec{
+				Containers: []corev1.Container{
+					{
+						EnvFrom: []corev1.EnvFromSource{
+							{
+								Prefix: "foo",
+							},
+						},
+					},
+				},
+			},
+			envFromVar: defaultEnvFromVars,
+			expected: &corev1.PodSpec{
+				Containers: []corev1.Container{
+					{
+						EnvFrom: append([]corev1.EnvFromSource{
+							{
+								Prefix: "foo",
+							},
+						}, defaultEnvFromVars...),
+					},
+				},
+			},
+		},
+		{
+			// PodSpec has more than one container(s)
+			// Expected: All container(s) should be updated as expected.
+			name: "WithMultipleContainers",
+			podSpec: &corev1.PodSpec{
+				Containers: []corev1.Container{
+					{},
+					{
+						EnvFrom: []corev1.EnvFromSource{
+							{
+								Prefix: "foo",
+							},
+						},
+					},
+					{
+						EnvFrom: []corev1.EnvFromSource{
+							{
+								Prefix: "bar",
+							},
+						},
+					},
+				},
+			},
+			envFromVar: defaultEnvFromVars,
+			expected: &corev1.PodSpec{
+				Containers: []corev1.Container{
+					{
+						EnvFrom: defaultEnvFromVars,
+					},
+					{
+						EnvFrom: append([]corev1.EnvFromSource{
+							{
+								Prefix: "foo",
+							},
+						}, defaultEnvFromVars...),
+					},
+					{
+						EnvFrom: append([]corev1.EnvFromSource{
+							{
+								Prefix: "bar",
+							},
+						}, defaultEnvFromVars...),
+					},
+				},
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			inject.InjectEnvFromIntoDeployment(tt.podSpec, tt.envFromVar)
+			assert.Equal(t, tt.expected, tt.podSpec)
+		})
+	}
+}
+
 func TestInjectTolerationsIntoDeployment(t *testing.T) {
 	tests := []struct {
 		name        string