azurerm_container_app - Relax validation on the ingress traffic

internal/services/containerapps/container_app_resource.go

@@ -440,36 +440,10 @@ func (r ContainerAppResource) CustomizeDiff() sdk.ResourceFunc {
 			// Ingress traffic weight validations
 			if len(app.Ingress) != 0 {
 				ingress := app.Ingress[0]
-				if metadata.ResourceDiff.HasChange("name") {
-					// Validation for create time
-					// (Above is a trick to tell whether this is for a new create apply, as the "name" is a force new property)
-					if len(ingress.TrafficWeights) != 0 {
-						if len(ingress.TrafficWeights) > 1 {
-							return fmt.Errorf("at most one `ingress.0.traffic_weight` can be specified during creation")
-						}
-						tw := ingress.TrafficWeights[0]
-						if !tw.LatestRevision {
-							return fmt.Errorf("`ingress.0.traffic_weight.0.latest_revision` must be set to true during creation")
-						}
-						if tw.RevisionSuffix != "" {
-							return fmt.Errorf("`ingress.0.traffic_weight.0.revision_suffix` must not be set during creation")
-						}
-					}
-				} else {
-					// Validation for update time
-					var latestRevCount int
-					for i, tw := range ingress.TrafficWeights {
-						if tw.LatestRevision {
-							latestRevCount++
-							if tw.RevisionSuffix != "" {
-								return fmt.Errorf("`ingress.0.traffic_weight.%[1]d.revision_suffix` conflicts with `ingress.0.traffic_weight.%[1]d.latest_revision`", i)
-							}
-						} else if tw.RevisionSuffix == "" {
-							return fmt.Errorf("`ingress.0.traffic_weight.%[1]d.revision_suffix` is not specified", i)
-						}
-					}
-					if latestRevCount > 1 {
-						return fmt.Errorf("more than one `ingress.0.traffic_weight` has `latest_revision` set to `true`")
+
+				for i, tw := range ingress.TrafficWeights {
+					if !tw.LatestRevision && tw.RevisionSuffix == "" {
+						return fmt.Errorf("`either ingress.0.traffic_weight.%[1]d.revision_suffix` or `ingress.0.traffic_weight.%[1]d.latest_revision` should be specified", i)
 					}
 				}
 			}

internal/services/containerapps/container_app_resource_test.go

@@ -570,16 +570,8 @@ func TestAccContainerAppResource_ingressTrafficValidation(t *testing.T) {
 
 	data.ResourceTest(t, r, []acceptance.TestStep{
 		{
-			Config:      r.ingressTrafficValidation(data, r.trafficBlockMoreThanOne()),
-			ExpectError: regexp.MustCompile(fmt.Sprintf(`at most one %s can be specified during creation`, "`ingress.0.traffic_weight`")),
-		},
-		{
-			Config:      r.ingressTrafficValidation(data, r.trafficBlockLatestRevisionNotSet()),
-			ExpectError: regexp.MustCompile(fmt.Sprintf(`%s must be set to true during creation`, "`ingress.0.traffic_weight.0.latest_revision`")),
-		},
-		{
-			Config:      r.ingressTrafficValidation(data, r.trafficBlockRevisionSuffixSet()),
-			ExpectError: regexp.MustCompile(fmt.Sprintf(`%s must not be set during creation`, "`ingress.0.traffic_weight.0.revision_suffix`")),
+			Config:      r.ingressTrafficValidation(data, r.latestRevisionFalseRevisionSuffixEmpty()),
+			ExpectError: regexp.MustCompile("`either ingress.0.traffic_weight.0.revision_suffix` or `ingress.0.traffic_weight.0.latest_revision` should be specified"),
 		},
 	})
 }
@@ -2832,31 +2824,11 @@ resource "azurerm_container_app" "test" {
 `, r.template(data), data.RandomInteger)
 }
 
-func (r ContainerAppResource) trafficBlockMoreThanOne() string {
-	return `
-traffic_weight {
-  percentage = 50
-}
-traffic_weight {
-  percentage = 50
-}
-`
-}
-
-func (r ContainerAppResource) trafficBlockLatestRevisionNotSet() string {
+func (r ContainerAppResource) latestRevisionFalseRevisionSuffixEmpty() string {
 	return `
 traffic_weight {
+  latest_revision = false
   percentage = 100
 }
 `
 }
-
-func (r ContainerAppResource) trafficBlockRevisionSuffixSet() string {
-	return `
-traffic_weight {
-  percentage      = 100
-  latest_revision = true
-  revision_suffix = "foo"
-}
-`
-}

website/docs/r/container_app.html.markdown

@@ -415,7 +415,7 @@ A `traffic_weight` block supports the following:
 
 * `revision_suffix` - (Optional) The suffix string to which this `traffic_weight` applies.
 
-~> **Note:** `latest_revision` conflicts with `revision_suffix`, which means you shall either set `latest_revision` to `true` or specify `revision_suffix`. Especially for creation, there shall only be one `traffic_weight`, with the `latest_revision` set to `true`, and leave the `revision_suffix` empty.
+~> **Note:** If `latest_revision` is `false`, the `revision_suffix` shall be specified.
 
 * `percentage` - (Required) The percentage of traffic which should be sent this revision.