fix: custom runtime container name is invalid (#3065)

* fix: custom runtime container name is invalid

* lint: pkg/executor/executortype/newdeploy/newdeploy.go

* Custom name for runtime container

Signed-off-by: Md Soharab Ansari <soharab.ansari@infracloud.io>

---------

Signed-off-by: Md Soharab Ansari <soharab.ansari@infracloud.io>
Co-authored-by: Md Soharab Ansari <soharab.ansari@infracloud.io>

pkg/executor/executortype/newdeploy/newdeploy.go

@@ -281,10 +281,20 @@ func (deploy *NewDeploy) getDeploymentSpec(ctx context.Context, fn *fv1.Function
 		},
 	}
 
+	// If custom runtime container name - default env name
+	mainContainerName := env.ObjectMeta.Name
+	if env.Spec.Runtime.Container != nil && env.Spec.Runtime.Container.Name != "" && env.Spec.Runtime.PodSpec != nil {
+		if util.DoesContainerExistInPodSpec(env.Spec.Runtime.Container.Name, env.Spec.Runtime.PodSpec) {
+			mainContainerName = env.Spec.Runtime.Container.Name
+		} else {
+			return nil, fmt.Errorf("runtime container %s not found in pod spec", env.Spec.Runtime.Container.Name)
+		}
+	}
+
 	// Order of merging is important here - first fetcher, then containers and lastly pod spec
 	err = deploy.fetcherConfig.AddSpecializingFetcherToPodSpec(
 		&deployment.Spec.Template.Spec,
-		env.ObjectMeta.Name,
+		mainContainerName,
 		fn,
 		env,
 	)

pkg/executor/executortype/poolmgr/gp_deployment.go

@@ -189,8 +189,18 @@ func (gp *GenericPool) genDeploymentSpec(env *fv1.Environment) (*appsv1.Deployme
 		Template: pod,
 	}
 
+	// If custom runtime container name - default env name
+	mainContainerName := env.ObjectMeta.Name
+	if env.Spec.Runtime.Container != nil && env.Spec.Runtime.Container.Name != "" && env.Spec.Runtime.PodSpec != nil {
+		if util.DoesContainerExistInPodSpec(env.Spec.Runtime.Container.Name, env.Spec.Runtime.PodSpec) {
+			mainContainerName = env.Spec.Runtime.Container.Name
+		} else {
+			return nil, fmt.Errorf("runtime container %s not found in pod spec", env.Spec.Runtime.Container.Name)
+		}
+	}
+
 	// Order of merging is important here - first fetcher, then containers and lastly pod spec
-	err = gp.fetcherConfig.AddFetcherToPodSpec(&deploymentSpec.Template.Spec, env.ObjectMeta.Name)
+	err = gp.fetcherConfig.AddFetcherToPodSpec(&deploymentSpec.Template.Spec, mainContainerName)
 	if err != nil {
 		return nil, err
 	}

pkg/executor/util/util.go

@@ -168,3 +168,13 @@ func CreateDumpFile(logger *zap.Logger) (*os.File, error) {
 
 	return os.Create(fmt.Sprintf("%s/%s-%d.txt", dumpPath, dumpFileName, time.Now().Unix()))
 }
+
+// DoesContainerExistInPodSpec checks if the container with the given name exists in the pod spec
+func DoesContainerExistInPodSpec(containerName string, podSpec *apiv1.PodSpec) bool {
+	for _, container := range podSpec.Containers {
+		if container.Name == containerName {
+			return true
+		}
+	}
+	return false
+}

pkg/fission-cli/cmd/spec/spec.go

@@ -30,6 +30,7 @@ import (
 	"sigs.k8s.io/yaml"
 
 	fv1 "github.com/fission/fission/pkg/apis/core/v1"
+	executorUtil "github.com/fission/fission/pkg/executor/util"
 	"github.com/fission/fission/pkg/fission-cli/cliwrapper/cli"
 	"github.com/fission/fission/pkg/fission-cli/cmd"
 	"github.com/fission/fission/pkg/fission-cli/cmd/spec/types"
@@ -489,6 +490,11 @@ func (fr *FissionResources) Validate(input cli.Input, client cmd.Client) ([]stri
 		environments[fmt.Sprintf("%s:%s", e.ObjectMeta.Name, e.ObjectMeta.Namespace)] = struct{}{}
 		if ((e.Spec.Runtime.Container != nil) && (e.Spec.Runtime.PodSpec != nil)) || ((e.Spec.Builder.Container != nil) && (e.Spec.Builder.PodSpec != nil)) {
 			warnings = append(warnings, "You have provided both - container spec and pod spec and while merging the pod spec will take precedence.")
+			if e.Spec.Runtime.Container.Name != "" && e.Spec.Runtime.PodSpec != nil {
+				if !executorUtil.DoesContainerExistInPodSpec(e.Spec.Runtime.Container.Name, e.Spec.Runtime.PodSpec) {
+					result = multierror.Append(result, fmt.Errorf("runtime container %s does not exist in the pod spec", e.Spec.Runtime.Container.Name))
+				}
+			}
 		}
 		// Unlike CLI can change the environment version silently,
 		// we have to warn the user to modify spec file when this takes place.