svc-optional

README.md

@@ -238,6 +238,7 @@ katenary.v3/env-from:		[]string			Add environment variables from another service
 katenary.v3/exchange-volumes:	[]object			Add exchange volumes (empty directory on the node) to share data
 katenary.v3/health-check:	object				Health check to be added to the deployment.
 katenary.v3/ignore:		bool				Ignore the service
+katenary.v3/svc-optional:	bool				Make the service optional.
 katenary.v3/ingress:		object				Ingress rules to be added to the service.
 katenary.v3/main-app:		bool				Mark the service as the main app.
 katenary.v3/map-env:		map[string]string		Map env vars from the service to the deployment.

doc/docs/labels.md

@@ -26,6 +26,7 @@ Katenary will try to _Unmarshal_ these labels.
 | `katenary.v3/exchange-volumes` | Add exchange volumes (empty directory on the node) to share data | `[]object`                       |
 | `katenary.v3/health-check`     | Health check to be added to the deployment.                      | `object`                         |
 | `katenary.v3/ignore`           | Ignore the service                                               | `bool`                           |
+| `katenary.v3/svc-optional`     | Make the service optional                                        | `bool`                           |
 | `katenary.v3/ingress`          | Ingress rules to be added to the service.                        | `object`                         |
 | `katenary.v3/main-app`         | Mark the service as the main app.                                | `bool`                           |
 | `katenary.v3/map-env`          | Map env vars from the service to the deployment.                 | `map[string]string`              |
@@ -270,6 +271,21 @@ labels:
   katenary.v3/ignore: "true"
 ```
 
+### katenary.v3/svc-optional
+
+Make the service optional
+
+**Type**:  `bool`
+
+Making a service to be optional in the exported helm chart.
+
+**Example:**
+
+```yaml
+labels:
+  katenary.v3/svc-optional: "true"
+```
+
 
 ### katenary.v3/ingress
 

doc/docs/packages/internal/generator/katenaryfile.md

@@ -45,6 +45,7 @@ type Service struct {
     SamePod         *string                        `yaml:"same-pod,omitempty" json:"same-pod,omitempty" jsonschema:"title=Same Pod,description=Service that should be in the same pod"`
     Description     *string                        `yaml:"description,omitempty" json:"description,omitempty" jsonschema:"title=Description,description=Description of the service that will be injected in the values.yaml file"`
     Ignore          *bool                          `yaml:"ignore,omitempty" json:"ignore,omitempty" jsonschema:"title=Ignore,description=Ignore the service in the conversion"`
+    SvcOptional     *bool                          `yaml:"svc-optional,omitempty" json:"svc-optional,omitempty" jsonschema:"title=SvcOptional,description=SvcOptional the service in the conversion"`
     Dependencies    []labelstructs.Dependency      `yaml:"dependencies,omitempty" json:"dependencies,omitempty" jsonschema:"title=Dependencies,description=Services that should be injected in the Chart.yaml file"`
     ConfigMapFiles  *labelstructs.ConfigMapFiles   `yaml:"configmap-files,omitempty" json:"configmap-files,omitempty" jsonschema:"title=ConfigMap Files,description=Files that should be injected as ConfigMap"`
     MapEnv          *labelstructs.MapEnv           `yaml:"map-env,omitempty" json:"map-env,omitempty" jsonschema:"title=Map Env,description=Map environment variables to another value"`

doc/docs/packages/internal/generator/labels.md

@@ -89,6 +89,7 @@ const (
     LabelSamePod        Label = KatenaryLabelPrefix + "/same-pod"
     LabelDescription    Label = KatenaryLabelPrefix + "/description"
     LabelIgnore         Label = KatenaryLabelPrefix + "/ignore"
+    LabelSvcOptional    Label = KatenaryLabelPrefix + "/svc-optional"
     LabelDependencies   Label = KatenaryLabelPrefix + "/dependencies"
     LabelConfigMapFiles Label = KatenaryLabelPrefix + "/configmap-files"
     LabelCronJob        Label = KatenaryLabelPrefix + "/cronjob"

doc/docs/usage.md

@@ -102,7 +102,7 @@ Katenary transforms compose services this way:
 For any other specific configuration, like binding local files as `ConfigMap`, bind variables, add values with
 documentation, etc. You'll need to use labels.
 
-Katenary can also configure containers grouping in pods, declare dependencies, ignore some services, force variables as
+Katenary can also configure containers grouping in pods, declare dependencies, ignore some services, make some services optional, force variables as
 secrets, mount files as `configMap`, and many others things. To adapt the helm chart generation, you will need to use
 some specific labels.
 

internal/generator/chart.go

@@ -200,6 +200,12 @@ func (chart *HelmChart) generateDeployment(service types.ServiceConfig, deployme
 		logger.Info("Ignoring service ", service.Name)
 		return nil
 	}
+	
+	// isgnored service
+	if isSvcOptional(service) {
+		logger.Info("Optional service ", service.Name)
+		return nil
+	}
 
 	// helm dependency
 	if isHelmDependency, err := chart.setDependencies(service); err != nil {

internal/generator/generator.go

@@ -50,6 +50,9 @@ func Generate(project *types.Project) (*HelmChart, error) {
 	// drop all services with the "ignore" label
 	dropIngoredServices(project)
 
+	// optional all services with the "svc-optional" label
+	makeSvcOptionalServices(project)
+
 	fixContainerNames(project)
 
 	// rename all services name to remove dashes
@@ -223,6 +226,16 @@ func dropIngoredServices(project *types.Project) {
 	}
 }
 
+// makeSvcOptionalServices makes all services optional with the "svc-optional" label set to true (or yes).
+func makeSvcOptionalServices(project *types.Project) {
+	for name, service := range project.Services {
+		if isSvcOptional(service) {
+			// delete(project.Services, name)
+			// make optional
+		}
+	}
+}
+
 // fixResourceNames renames all services and related resources to remove dashes.
 func fixResourceNames(project *types.Project) error {
 	// rename all services name to remove dashes

internal/generator/katenaryfile/main.go

@@ -34,6 +34,7 @@ type Service struct {
 	SamePod         *string                        `yaml:"same-pod,omitempty" json:"same-pod,omitempty" jsonschema:"title=Same Pod,description=Service that should be in the same pod"`
 	Description     *string                        `yaml:"description,omitempty" json:"description,omitempty" jsonschema:"title=Description,description=Description of the service that will be injected in the values.yaml file"`
 	Ignore          *bool                          `yaml:"ignore,omitempty" json:"ignore,omitempty" jsonschema:"title=Ignore,description=Ignore the service in the conversion"`
+	SvcOptional     *bool                          `yaml:"svc-optional,omitempty" json:"svc-optional,omitempty" jsonschema:"title=SvcOptional,description=SvcOptional the service in the conversion"`
 	Dependencies    []labelstructs.Dependency      `yaml:"dependencies,omitempty" json:"dependencies,omitempty" jsonschema:"title=Dependencies,description=Services that should be injected in the Chart.yaml file"`
 	ConfigMapFiles  *labelstructs.ConfigMapFiles   `yaml:"configmap-files,omitempty" json:"configmap-files,omitempty" jsonschema:"title=ConfigMap Files,description=Files that should be injected as ConfigMap"`
 	MapEnv          *labelstructs.MapEnv           `yaml:"map-env,omitempty" json:"map-env,omitempty" jsonschema:"title=Map Env,description=Map environment variables to another value"`
@@ -94,6 +95,7 @@ func OverrideWithConfig(project *types.Project) {
 			mustGetLabelContent(s.SamePod, labels.LabelSamePod)
 			mustGetLabelContent(s.Description, labels.LabelDescription)
 			mustGetLabelContent(s.Ignore, labels.LabelIgnore)
+			mustGetLabelContent(s.SvcOptional, labels.LabelSvcOptional)
 			mustGetLabelContent(s.Dependencies, labels.LabelDependencies)
 			mustGetLabelContent(s.ConfigMapFiles, labels.LabelConfigMapFiles)
 			mustGetLabelContent(s.MapEnv, labels.LabelMapEnv)

internal/generator/labels/katenaryLabels.go

@@ -30,6 +30,7 @@ const (
 	LabelSamePod        Label = KatenaryLabelPrefix + "/same-pod"
 	LabelDescription    Label = KatenaryLabelPrefix + "/description"
 	LabelIgnore         Label = KatenaryLabelPrefix + "/ignore"
+	LabelSvcOptional    Label = KatenaryLabelPrefix + "/svc-optional"
 	LabelDependencies   Label = KatenaryLabelPrefix + "/dependencies"
 	LabelConfigMapFiles Label = KatenaryLabelPrefix + "/configmap-files"
 	LabelCronJob        Label = KatenaryLabelPrefix + "/cronjob"

internal/generator/labels/katenaryLabelsDoc.yaml

@@ -183,6 +183,12 @@
   example: "labels:\n  {{ .KatenaryPrefix }}/ignore: \"true\""
   type: "bool"
 
+"svc-optional":
+  short: "Make the service optional in the resulting helm chart"
+  long: "Making a service optional to be exported in helm chart."
+  example: "labels:\n  {{ .KatenaryPrefix }}/svc-optional: \"true\""
+  type: "bool"
+
 "dependencies":
   short: "Add Helm dependencies to the service."
   long: |-

internal/generator/utils.go

@@ -83,6 +83,14 @@ func isIgnored(service types.ServiceConfig) bool {
 	return false
 }
 
+// isSvcOptionald returns true if the service is optional.
+func isSvcOptional(service types.ServiceConfig) bool {
+	if v, ok := service.Labels[labels.LabelSvcOptional]; ok {
+		return v == "true" || v == "yes" || v == "1"
+	}
+	return false
+}
+
 // UnWrapTPL removes the line wrapping from a template.
 func UnWrapTPL(in []byte) []byte {
 	return regexpLineWrap.ReplaceAll(in, []byte(" }}"))

katenary.json

@@ -309,6 +309,11 @@
           "title": "Ignore",
           "description": "Ignore the service in the conversion"
         },
+        "svc-optional": {
+          "type": "boolean",
+          "title": "SvcOptional",
+          "description": "Make the service optional in the conversion"
+        },
         "dependencies": {
           "items": {
             "$ref": "#/$defs/Dependency"