creating services inside the argo manifest

.vscode/launch.json

@@ -0,0 +1,18 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Launch Package",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "${fileDirname}",
+            "args": ["-e","e3b7772e-dc9f-4bc1-9f5d-533e23e6cd57" ,"-u","http://127.0.0.1:3100","-m" ,"mongodb://127.0.0.1:27017","-d","DC_myDC"],
+            "env": {"OCMONITOR_LOKIURL":"http://127.0.0.1:3100","OCMONITOR_WORKFLOW":"8d0f1814-b5ca-436c-ba3f-116d99198fd2","KUBERNETES_SERVICE_HOST":"","OCMONITOR_MONGOURL":"mongodb://127.0.0.1:27017","OCMONITOR_DATABASE":"DC_myDC","test_service":"true"}
+        }
+    ]
+}
+

README.md

@@ -47,6 +47,76 @@ In rules add a new entry :
 
 This command **must return "yes"**
 
+## Allow services to be joined with reverse proxy
+
+Since the development has been realised in a K3S environment, we will use the lightweight solution provided by **traefik**. 
+
+We need to install **metallb** to expose our cluster to the exterior and allow packets to reach traefik.
+
+### Deploy traefik and metallb
+
+- Make sure that helm is installed, else visit : https://helm.sh/docs/intro/install/ 
+
+- Add the repositories for traefik and metallb
+> helm repo add metallb https://metallb.github.io/metallb 
+> helm repo add traefik https://helm.traefik.io/traefik
+
+>helm repo update
+
+- Create the namespaces for each
+> kubectl create ns traefik-ingress
+> kubectl create ns metallb-system 
+
+- Configure the deployment 
+
+```
+cat > traefik-values.yaml <<EOF
+globalArguments:
+deployment:
+  kind: DaemonSet
+providers:
+  kubernetesCRD:
+    enabled: true
+service:
+  type: LoadBalancer
+ingressRoute:
+  dashboard:
+    enabled: false
+EOF
+```
+
+- Launch the installs
+> helm upgrade --install metallb metallb/metallb --namespace metallb-system
+
+> helm install --namespace=traefik-ingress traefik traefik/traefik --values=./traefik-values.yaml
+
+### Configure metallb
+
+```
+cat << 'EOF' | kubectl apply -f -
+apiVersion: metallb.io/v1beta1
+kind: IPAddressPool
+metadata:
+  name: default-pool
+  namespace: metallb-system
+spec:
+  addresses:
+  - 192.168.0.200-192.168.0.250
+---
+apiVersion: metallb.io/v1beta1
+kind: L2Advertisement
+metadata:
+  name: default
+  namespace: metallb-system
+spec:
+  ipAddressPools:
+  - default-pool
+EOF
+```
+
+- Check that the services created in traefik-ingress have an external IP
+
+> kubectl get service -n traefik-ingress -o wide
 
 ## TODO
 

demo_nginx/nginx.conf

@@ -0,0 +1,30 @@
+# nginx.conf
+user  nginx;
+worker_processes  auto;
+error_log  /var/log/nginx/error.log warn;
+pid        /var/run/nginx.pid;
+events {
+  worker_connections  1024;
+}
+http {
+  include       /etc/nginx/mime.types;
+  default_type  application/octet-stream;
+  log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
+  '$status $body_bytes_sent "$http_referer" '
+  '"$http_user_agent" "$http_x_forwarded_for"';
+  access_log  /var/log/nginx/access.log  main;
+  sendfile        on;
+  #tcp_nopush     on;
+  
+  keepalive_timeout  65;
+  #gzip  on;
+  #include /etc/nginx/conf.d/*.conf;
+server {
+  listen 80;
+  location / {
+    root   /usr/share/nginx/html;
+    index  index.html index.htm;
+    try_files $uri $uri/ /index.html;
+  }
+}
+}

main.go

@@ -46,8 +46,6 @@ const localConfigFile = "./conf/local_ocmonitord_conf.json"
 
 func main() {
 
-	os.Setenv("test_service","true") 	// Only for service demo, delete before merging on main
-
 	monitorLocal = false
 	// Test if monitor is launched outside (with parameters) or in a k8s environment (env variables sets)
 	if os.Getenv("KUBERNETES_SERVICE_HOST") == "" {

models/ingress.go

@@ -0,0 +1,101 @@
+package models
+
+import "strconv"
+
+// apiVersion: networking.k8s.io/v1
+// kind: Ingress
+// metadata:
+//   name: example-ingress
+//   namespace: argo
+//   annotations:
+//     traefik.ingress.kubernetes.io/router.entrypoints: web  # Utilisation de l'entrypoint HTTP standard
+// spec:
+//   rules:
+//   - http:
+//       paths:
+//       - path: /dtf
+//         pathType: Prefix
+//         backend:
+//           service:
+//             name: workflow-service-qtjk2
+//             port:
+//               number: 80
+
+var ingress_manifest = &Manifest{
+	ApiVersion: "networking.k8s.io/v1",
+	Kind: "Ingress",
+	Metadata: Metadata{
+		GenerateName: "ingress-argo-",
+	},
+}
+
+type Ingress struct {
+	ApiVersion string      `yaml:"apiVersion,omitempty"`
+	Kind       string      `yaml:"kind,omitempty"`
+	Metadata   Metadata    `yaml:"metadata,omitempty"`
+	Spec       IngressSpec `yaml:"spec,omitempty"`
+}
+
+
+
+type IngressSpec struct {
+	Rules []Rule `yaml:"rules,omitempty"`
+}
+
+type Rule struct {
+	HTTP HTTP `yaml:"http,omitempty"`
+}
+
+type HTTP struct {
+	Paths []Path `yaml:"paths,omitempty"`
+}
+
+type Path struct {
+	Path     string  `yaml:"path,omitempty"`
+	PathType string  `yaml:"pathType,omitempty"`
+	Backend  Backend `yaml:"backend,omitempty"`
+}
+
+type Backend struct {
+	ServiceName string `yaml:"serviceName,omitempty"`
+	ServicePort int64  `yaml:"servicePort,omitempty"`
+}
+
+func NewIngress(contract map[string]map[string]string, serviceName string) Ingress {
+	new_ingr := Ingress{
+		ApiVersion: "networking.k8s.io/v1",
+		Kind:       "Ingress",
+		Metadata: Metadata{
+			GenerateName: "ingress-argo-",
+		},
+		Spec: IngressSpec{
+			Rules: []Rule{
+				{
+					HTTP: HTTP{
+						Paths: []Path{},
+						},
+					},
+				},
+			},
+		}
+
+	for port_to_reverse_str, translations := range contract{
+		
+		port, _ := strconv.ParseInt(port_to_reverse_str,10,64)
+
+		port_reverse := Path{
+			Path:     translations["reverse"],
+			PathType: "Prefix",
+			Backend: Backend{
+				ServiceName: serviceName,
+				ServicePort:port,
+			},
+		}
+
+		new_ingr.Spec.Rules[0].HTTP.Paths = append(new_ingr.Spec.Rules[0].HTTP.Paths, port_reverse)
+
+	}
+
+	return new_ingr
+}
+

models/k8s_manifest.go

@@ -0,0 +1,12 @@
+package models
+
+type Manifest struct {
+	ApiVersion string   `yaml:"apiVersion,omitempty"`
+	Kind       string   `yaml:"kind"`
+	Metadata   Metadata `yaml:"metadata,omitempty"`
+}
+
+type Metadata struct {
+    Name      		string	`yaml:"name"`
+    GenerateName	string	`yaml:"generateName"`
+}

models/services.go

@@ -10,16 +10,11 @@ type ServiceResource struct {
 }
 
 type Service struct {
-    APIVersion string            `yaml:"apiVersion"`
-    Kind       string            `yaml:"kind"`
-    Metadata   Metadata          `yaml:"metadata"`
+    Manifest
     Spec       ServiceSpec       `yaml:"spec"`
 }
 
-type Metadata struct {
-    Name      string            `yaml:"name"`
-    
-}
+
 
 // ServiceSpec is the specification of the Kubernetes Service
 type ServiceSpec struct {

traefik-values.yaml

@@ -0,0 +1,11 @@
+globalArguments:
+deployment:
+  kind: DaemonSet
+providers:
+  kubernetesCRD:
+    enabled: true
+service:
+  type: LoadBalancer
+ingressRoute:
+  dashboard:
+    enabled: false

workflow_builder/argo_builder.go

@@ -5,14 +5,17 @@
 package workflow_builder
 
 import (
+	"oc-monitord/models"
 	. "oc-monitord/models"
 	"os"
 	"slices"
+	"strconv"
 	"strings"
 	"time"
 
 	oclib "cloud.o-forge.io/core/oc-lib"
 	"cloud.o-forge.io/core/oc-lib/models/resource_model"
+	"cloud.o-forge.io/core/oc-lib/models/resources/processing"
 	"cloud.o-forge.io/core/oc-lib/models/resources/workflow/graph"
 	w "cloud.o-forge.io/core/oc-lib/models/workflow"
 	"github.com/nwtgck/go-fakelish"
@@ -22,23 +25,26 @@ import (
 
 var logger zerolog.Logger
 
+type ServiceExposure int 
+const (
+	PAT 	ServiceExposure = iota
+	Reverse
+	Both
+)
+
 type ArgoBuilder struct {
 	OriginWorkflow 	w.Workflow
 	Workflow       	Workflow
-	Services		*Service
+	Services		[]Service
 	Timeout        	int
 }
 
 type Workflow struct {
-	ApiVersion string `yaml:"apiVersion"`
-	Kind       string `yaml:"kind"`
-	Metadata   struct {
-		Name string `yaml:"name"`
-	} `yaml:"metadata"`
-	Spec Spec `yaml:"spec,omitempty"`
+	Manifest
+	Spec ArgoSpec `yaml:"spec,omitempty"`
 }
 
-type Spec struct {
+type ArgoSpec struct {
 	Entrypoint string                `yaml:"entrypoint"`
 	Arguments  []Parameter           `yaml:"arguments,omitempty"`
 	Volumes    []VolumeClaimTemplate `yaml:"volumeClaimTemplates,omitempty"`
@@ -46,13 +52,12 @@ type Spec struct {
 	Timeout    int                   `yaml:"activeDeadlineSeconds,omitempty"`
 }
 
+
+
 func (b *ArgoBuilder) CreateDAG() (string, error) {
 	
 	// handle services by checking if there is only one processing with hostname and port
-	
-	b.createNginxVolumes()
-	
-	
+		
 	b.createTemplates()
 	b.createDAGstep()
 	b.createVolumes()
@@ -62,7 +67,7 @@ func (b *ArgoBuilder) CreateDAG() (string, error) {
 		b.Workflow.Spec.Timeout = b.Timeout
 	}
 	b.Workflow.Spec.Entrypoint = "dag"
-	b.Workflow.ApiVersion = "argoproj.io/v1alpha1"
+	b.Workflow.Manifest.ApiVersion = "argoproj.io/v1alpha1"
 	b.Workflow.Kind = "Workflow"
 	random_name := generateWfName()
 	b.Workflow.Metadata.Name = "oc-monitor-" + random_name
@@ -91,6 +96,7 @@ func (b *ArgoBuilder) createTemplates() {
 		var command string
 		var args string
 		var env string
+		var serv models.Service
 
 		comp_res := comp.Processing
 
@@ -114,24 +120,39 @@ func (b *ArgoBuilder) createTemplates() {
 		new_temp := Template{Name: argo_name, Container: temp_container}
 		new_temp.Inputs.Parameters = inputs_container
 		new_temp.Container.VolumeMounts = append(new_temp.Container.VolumeMounts, VolumeMount{Name: "workdir", MountPath: "/mnt/vol"}) // TODO : replace this with a search of the storage / data source name
-		new_temp.Container.VolumeMounts = append(new_temp.Container.VolumeMounts, VolumeMount{Name: "nginx-demo", MountPath: "/usr/share/nginx"}) // Used for processing services' demo with nginx 
 		
 		if (b.isService(comp.ID)){
-			serv := b.CreateService(comp)
-			b.createService(serv, argo_name, comp.ID)
-			new_temp.Metadata.Labels = make(map[string]string)
-			new_temp.Metadata.Labels["app"] = "oc-service"		// Construct the template for the k8s service and add a link in graph between k8s service and processing
+
+			serv_type := getServiceExposure(*comp.Processing)
+			if serv_type == PAT || serv_type == Both{
+				serv = b.CreateKubeService(comp, NodePort)
+				b.addKubeServiceToWorkflow(serv, argo_name, comp.ID)
+				new_temp.Metadata.Labels = make(map[string]string)
+				new_temp.Metadata.Labels["app"] = serv.Spec.Selector["app"]		// Construct the template for the k8s service and add a link in graph between k8s service and processing
+				b.addServiceToArgo(serv)
+				ingress := b.CreateIngress(comp,serv)
+				b.addIngressToWorfklow(ingress, argo_name, comp.ID)
+
+			}
+			if serv_type == Reverse || serv_type == Both{
+				serv = b.CreateKubeService(comp, ClusterIP)
+				// create ingress by passing the service and the processing (or reverse)
+				b.addKubeServiceToWorkflow(serv, argo_name, comp.ID)
+				new_temp.Metadata.Labels = make(map[string]string)
+				new_temp.Metadata.Labels["app"] = serv.Spec.Selector["app"]		// Construct the template for the k8s service and add a link in graph between k8s service and processing
+				b.addServiceToArgo(serv)
+			}
+
+			
 			// if err != nil {
 			// 	// TODO
 			// }
 		}
 		
 		b.Workflow.Spec.Templates = append(b.Workflow.Spec.Templates, new_temp)
+
 	}
 
-	if b.Services != nil {
-		b.addServiceToArgo()
-	}
 
 }
 
@@ -153,8 +174,9 @@ func (b *ArgoBuilder) createDAGstep() {
 		new_dag.Tasks = append(new_dag.Tasks, step)
 	}
 
-	if b.Services != nil {
-		new_dag.Tasks = append(new_dag.Tasks, Task{Name:"workflow-service-pod", Template: "workflow-service-pod"})
+	for i, _ := range b.Services {
+		name := "workflow-service-pod-"+strconv.Itoa(i + 1)
+		new_dag.Tasks = append(new_dag.Tasks, Task{Name: name , Template: name})
 	}
 
 	b.Workflow.Spec.Templates = append(b.Workflow.Spec.Templates, Template{Name: "dag", Dag: new_dag})
@@ -170,15 +192,6 @@ func (b *ArgoBuilder) createVolumes() {
 	b.Workflow.Spec.Volumes = append(b.Workflow.Spec.Volumes, new_volume)
 }
 
-// For demo purposes, until we implement the use of storage ressources
-func (b *ArgoBuilder) createNginxVolumes() {
-	new_volume := VolumeClaimTemplate{}
-	new_volume.Metadata.Name = "nginx-demo"
-	new_volume.Spec.AccessModes = []string{"ReadWriteOnce"}
-	new_volume.Spec.Resources.Requests.Storage = "1Gi"
-
-	b.Workflow.Spec.Volumes = append(b.Workflow.Spec.Volumes, new_volume)
-}
 
 
 func (b *ArgoBuilder) getDependency(current_computing_id string) (dependencies []string) {
@@ -319,14 +332,29 @@ func (b *ArgoBuilder) isService(id string) bool{
 	return is_exposed
 }
 
+func getServiceExposure(service processing.ProcessingResource) ServiceExposure{
+	var exposure_type ServiceExposure
 
-func (b *ArgoBuilder) addLabel(name string, id string) {
-	argo_name := getArgoName(name,id)
-	for _, template := range b.Workflow.Spec.Templates{
-		if template.Name == argo_name{
-			template.Metadata.Labels["app"] = "service-workflow"			
-			return
-		}
+	contract := getExposeContract(service.ResourceModel.Model["expose"])
+	_, pat := contract["PAT"]
+	_, reverse := contract["reverse"]
+	
+	if pat && reverse {
+		exposure_type=  Both
 	}
+	if pat {
+		exposure_type = PAT
+	}
+	if reverse{
+		exposure_type = Reverse 
+	}
+
+	return exposure_type
+	
 }
 
+func (b *ArgoBuilder) CreateIngress(processing processing.ProcessingResource, service Service) Ingress{
+	contract := getExposeContract(processing.ResourceModel.Model["expose"])
+	new_ingress := models.NewIngress(contract,service.Metadata.Name)
+	return new_ingress
+}

workflow_builder/argo_services.go

@@ -7,11 +7,19 @@ import (
 
 	"cloud.o-forge.io/core/oc-lib/models/resource_model"
 	"cloud.o-forge.io/core/oc-lib/models/resources/workflow/graph"
+	"github.com/nwtgck/go-fakelish"
 	"go.mongodb.org/mongo-driver/bson"
 	"go.mongodb.org/mongo-driver/bson/primitive"
 	"gopkg.in/yaml.v3"
 )
 
+type ServiceType string 
+
+const (
+	NodePort	ServiceType = "NodePort"
+	ClusterIP	ServiceType = "ClusterIP"
+)
+
 // TODO : refactor this method or the deserialization process in oc-lib to get rid of the mongo code
 func getExposeContract(expose resource_model.Model) map[string]map[string]string {
 	contract := make(map[string]map[string]string,0)
@@ -40,7 +48,7 @@ func getExposeContract(expose resource_model.Model) map[string]map[string]string
 }
 
 
-func (b *ArgoBuilder) CreateService(processing graph.GraphItem) models.Service{
+func (b *ArgoBuilder) CreateKubeService(processing graph.GraphItem, service_type ServiceType) models.Service{
 	
 	// model {
 	// 	Type : "dict",
@@ -57,23 +65,24 @@ func (b *ArgoBuilder) CreateService(processing graph.GraphItem) models.Service{
 	// }
 	
 
-	new_service := models.Service{APIVersion: "v1", 
-							Kind: "Service", 
-							Metadata: models.Metadata{
-								Name: "workflow-service" ,
-							}, 
-							Spec: models.ServiceSpec{
-								Selector: map[string]string{"app": "oc-service"},
-								Ports: []models.ServicePort{
-								},
-								Type: "NodePort",
-							},
-					}
-	
+	new_service := models.Service{
+		Manifest: models.Manifest{
+			ApiVersion: "v1", 
+			Kind: "Service", 
+			Metadata: models.Metadata{
+				Name: "workflow-service-"+ processing.Processing.Name + "-" + processing.ID ,
+				},
+			},
+			Spec: models.ServiceSpec{
+				Selector: map[string]string{"app": "service-" + fakelish.GenerateFakeWord(5, 8)},
+				Ports: []models.ServicePort{
+				},
+				Type: string(service_type),
+			},
+	}
+
 	completeServicePorts(&new_service, processing)
-	yamlified, _ := yaml.Marshal(new_service)
-	x := string(yamlified)
-	_ = x
+	
 	return new_service
 }
 
@@ -90,7 +99,7 @@ func completeServicePorts(service *models.Service, processing graph.GraphItem) {
 			return
 		}
 
-		
+		// This condition allows us to create NodePort if PAT is filled or a ClusterIP that only expose port 80 and 443 (for Ingress)
 		if _, ok := translation_dict["PAT"]; ok{
 			port_translation, err := strconv.ParseInt(translation_dict["PAT"], 10, 64)
 			if err != nil {
@@ -98,8 +107,6 @@ func completeServicePorts(service *models.Service, processing graph.GraphItem) {
 				return
 			}
 			
-
-
 			new_port_translation := models.ServicePort{
 				Name: strings.ToLower(processing.Processing.Name) + processing.ID,
 				Port:  port_translation-30000,
@@ -108,32 +115,52 @@ func completeServicePorts(service *models.Service, processing graph.GraphItem) {
 				Protocol: "TCP",
 			}
 			service.Spec.Ports = append(service.Spec.Ports, new_port_translation)
-		} 
-
-	}
-
-	return
-}
-
-func (b *ArgoBuilder) createService(service models.Service, processing_name string, processing_id string) {
-	if b.Services != nil{
-		b.Services.Spec.Ports = append(b.Services.Spec.Ports, service.Spec.Ports...)
-		}else {
-			b.Services = &service
-		}
+		} else {
+			port_spec := []models.ServicePort{
+				models.ServicePort{
+					Name: strings.ToLower(processing.Processing.Name) + processing.ID + "-80",
+					Port:  80,
+					TargetPort: 80,
+					Protocol: "TCP",
+			},
+			models.ServicePort{
+				Name: strings.ToLower(processing.Processing.Name) + processing.ID + "-443",
+				Port:  443,
+				TargetPort: 443,
+				Protocol: "TCP",
+			},
 		
-	b.addLabel(processing_name,processing_id)
+		}
+		service.Spec.Ports = append(service.Spec.Ports,port_spec...)
+
+		}
+	}
+	return
 
 }
 
-func (b *ArgoBuilder) addServiceToArgo() error {
-	service_manifest, err := yaml.Marshal(b.Services)
+// The k8s service passed as the parameter only expose one port because it is the result of CreateService()
+// we check if this port is already exposed by a service in the workflow and we proceed to the creation of a new service OR 
+// add the port to the list of port exposed by an existing if portAlreadyExposed is false 
+func (b *ArgoBuilder) addKubeServiceToWorkflow(service models.Service, processing_name string, processing_id string) (label string) {
+	if exposed, service_available_port := b.portAlreadyExposed(service.Spec.Ports[0].TargetPort); exposed && service_available_port != nil{
+		// The port you want to expose is already exposed by all the existing services
+		service_available_port.Spec.Ports = append(service_available_port.Spec.Ports, service.Spec.Ports...)
+		return service_available_port.Spec.Selector["app"]
+	} 
+
+	b.Services = append(b.Services, service)
+	return service.Spec.Selector["app"]	
+}
+
+func (b *ArgoBuilder) addServiceToArgo(service models.Service) error {
+	service_manifest, err := yaml.Marshal(service)
 	if err != nil {
 		logger.Error().Msg("Could not marshal service manifest")
 		return err
 	}
 	
-	service_template := models.Template{Name: "workflow-service-pod", 
+	service_template := models.Template{Name: "workflow-service-pod-" + strconv.Itoa(len(b.Services)), 
 								Resource: models.ServiceResource{
 									Action: "create", 
 									SuccessCondition: "status.succeeded > 0",
@@ -145,4 +172,44 @@ func (b *ArgoBuilder) addServiceToArgo() error {
 	b.Workflow.Spec.Templates = append(b.Workflow.Spec.Templates, service_template)
 
 	return nil
+}
+
+
+func (b *ArgoBuilder) addLabel(name string, id string) {
+	argo_name := getArgoName(name,id)
+	for _, template := range b.Workflow.Spec.Templates{
+		if template.Name == argo_name{
+			template.Metadata.Labels["app"] = "service-workflow"			
+			return
+		}
+	}
+}
+
+func (b *ArgoBuilder) portAlreadyExposed(port int64) (exposed bool, service *models.Service ){
+	// For all already existing k8s services, test if the port in parameter is already exposed and returns the first service that doesn't yet expose this port 
+	for _, s := range b.Services {
+		i := 0
+		port_exposed := false
+		for !port_exposed {
+			if s.Spec.Ports[i].TargetPort == port {
+				port_exposed = true
+			}
+		}
+		if !port_exposed {
+			return false, &s
+		}
+	}
+
+	return true, nil
+}
+
+// If contract has a reverse value
+	// Test if service already exist for the argo service
+		// Yes : create ingress, associate it with the existing kube service (name + exposed port on service) 
+		// No : 
+			// - create template for a service that expose the port of the argo service (pod)
+			// - store the name of the service and its port exposed
+			// - create template for an ingress : manifest must contain the path, name of the service and port exposed on the service
+func (b *ArgoBuilder) addIngress(){
+
 }