deletes pipelines on space removal

pipelines doesnt get deleted while removing a space
which leaves dangling pipelines in OpenShift.

This patch deletes the pipelines while removing a
space

Patch adds
- REST API to delete pipeline by space label
- Test cases for delete pipeline(buildconfig) function
- Delete BuildConfig API in OpenShift client
- Test cases for delete BuildConfig API
- Refactors kubernetes_client to get client objects
- Fixes delete OpenShift resources tests

Fixes
 -openshiftio/openshift.io#3802

controller/deployments.go

@@ -4,8 +4,6 @@ import (
 	"context"
 	"encoding/json"
 	"io"
-	"net/url"
-	"os"
 	"time"
 
 	"github.com/fabric8-services/fabric8-wit/app"
@@ -17,10 +15,10 @@ import (
 
 	"github.com/goadesign/goa"
 	errs "github.com/pkg/errors"
-	uuid "github.com/satori/go.uuid"
+	"github.com/satori/go.uuid"
 	"golang.org/x/net/websocket"
 	metaV1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	v1 "k8s.io/client-go/pkg/api/v1"
+	"k8s.io/client-go/pkg/api/v1"
 	"k8s.io/client-go/tools/cache"
 )
 
@@ -31,17 +29,6 @@ type DeploymentsController struct {
 	ClientGetter
 }
 
-// ClientGetter creates an instances of clients used by this controller
-type ClientGetter interface {
-	GetKubeClient(ctx context.Context) (kubernetes.KubeClientInterface, error)
-	GetAndCheckOSIOClient(ctx context.Context) (OpenshiftIOClient, error)
-}
-
-// Default implementation of KubeClientGetter and OSIOClientGetter used by NewDeploymentsController
-type defaultClientGetter struct {
-	config *configuration.Registry
-}
-
 // NewDeploymentsController creates a deployments controller.
 func NewDeploymentsController(service *goa.Service, config *configuration.Registry) *DeploymentsController {
 	return &DeploymentsController{
@@ -61,41 +48,6 @@ func tostring(item interface{}) string {
 	return string(bytes)
 }
 
-func (g *defaultClientGetter) GetAndCheckOSIOClient(ctx context.Context) (OpenshiftIOClient, error) {
-
-	// defaults
-	host := "localhost"
-	scheme := "https"
-
-	req := goa.ContextRequest(ctx)
-	if req != nil {
-		// Note - it's probably more efficient to force a loopback host, and only use the port number here
-		// (on some systems using a non-loopback interface forces a network stack traverse)
-		host = req.Host
-		scheme = req.URL.Scheme
-	}
-
-	// The deployments API communicates with the rest of WIT via the stnadard WIT API.
-	// This environment variable is used for local development of the deployments API, to point ot a remote WIT.
-	witURLStr := os.Getenv("FABRIC8_WIT_API_URL")
-	if witURLStr != "" {
-		witurl, err := url.Parse(witURLStr)
-		if err != nil {
-			log.Error(ctx, map[string]interface{}{
-				"FABRIC8_WIT_API_URL": witURLStr,
-				"err": err,
-			}, "cannot parse FABRIC8_WIT_API_URL: %s", witURLStr)
-			return nil, errs.Wrapf(err, "cannot parse FABRIC8_WIT_API_URL: %s", witURLStr)
-		}
-		host = witurl.Host
-		scheme = witurl.Scheme
-	}
-
-	oc := NewOSIOClient(ctx, scheme, host)
-
-	return oc, nil
-}
-
 // getSpaceNameFromSpaceID() converts an OSIO Space UUID to an OpenShift space name.
 // will return an error if the space is not found.
 func (c *DeploymentsController) getSpaceNameFromSpaceID(ctx context.Context, spaceID uuid.UUID) (*string, error) {
@@ -116,74 +68,6 @@ func (c *DeploymentsController) getSpaceNameFromSpaceID(ctx context.Context, spa
 	return osioSpace.Attributes.Name, nil
 }
 
-func (g *defaultClientGetter) getNamespaceName(ctx context.Context) (*string, error) {
-
-	osioclient, err := g.GetAndCheckOSIOClient(ctx)
-	if err != nil {
-		return nil, err
-	}
-
-	kubeSpaceAttr, err := osioclient.GetNamespaceByType(ctx, nil, "user")
-	if err != nil {
-		return nil, errs.Wrap(err, "unable to retrieve 'user' namespace")
-	}
-	if kubeSpaceAttr == nil {
-		return nil, errors.NewNotFoundError("namespace", "user")
-	}
-
-	return kubeSpaceAttr.Name, nil
-}
-
-// GetKubeClient creates a kube client for the appropriate cluster assigned to the current user
-func (g *defaultClientGetter) GetKubeClient(ctx context.Context) (kubernetes.KubeClientInterface, error) {
-
-	kubeNamespaceName, err := g.getNamespaceName(ctx)
-	if err != nil {
-		log.Error(ctx, map[string]interface{}{
-			"err": err,
-		}, "could not retrieve namespace name")
-		return nil, errs.Wrap(err, "could not retrieve namespace name")
-	}
-
-	osioclient, err := g.GetAndCheckOSIOClient(ctx)
-	if err != nil {
-		log.Error(ctx, map[string]interface{}{
-			"err": err,
-		}, "could not create OSIO client")
-		return nil, err
-	}
-
-	baseURLProvider, err := NewURLProvider(ctx, g.config, osioclient)
-	if err != nil {
-		log.Error(ctx, map[string]interface{}{
-			"err": err,
-		}, "could not retrieve tenant data")
-		return nil, errs.Wrap(err, "could not retrieve tenant data")
-	}
-
-	/* Timeout used per HTTP request to Kubernetes/OpenShift API servers.
-	 * Communication with Hawkular currently uses a hard-coded 30 second
-	 * timeout per request, and does not use this parameter. */
-	// create the cluster API client
-	kubeConfig := &kubernetes.KubeClientConfig{
-		BaseURLProvider: baseURLProvider,
-		UserNamespace:   *kubeNamespaceName,
-		Timeout:         g.config.GetDeploymentsHTTPTimeoutSeconds(),
-	}
-	kc, err := kubernetes.NewKubeClient(kubeConfig)
-	if err != nil {
-		url, _ := baseURLProvider.GetAPIURL()
-		log.Error(ctx, map[string]interface{}{
-			"err":            err,
-			"user_namespace": *kubeNamespaceName,
-			"cluster":        *url,
-		}, "could not create Kubernetes client object")
-		return nil, errs.Wrap(err, "could not create Kubernetes client object")
-	}
-	return kc, nil
-}
-
-// SetDeployment runs the setDeployment action.
 func (c *DeploymentsController) SetDeployment(ctx *app.SetDeploymentDeploymentsContext) error {
 
 	// we double check podcount here, because in the future we might have different query parameters

controller/deployments_blackbox_test.go

@@ -53,6 +53,11 @@ type testOSIOClient struct {
 	controller.OpenshiftIOClient
 }
 
+type testOSClient struct {
+	fixture *deploymentsTestFixture
+	kubernetes.OpenShiftRESTAPI
+}
+
 func (kc *testKubeClient) Close() {
 	kc.closed = true
 }
@@ -97,6 +102,12 @@ func (fixture *deploymentsTestFixture) GetAndCheckOSIOClient(ctx context.Context
 	}, nil
 }
 
+func (fixture *deploymentsTestFixture) GetOSClient(ctx context.Context) (kubernetes.OpenShiftRESTAPI, error) {
+	return &testOSClient {
+		fixture: fixture,
+	}, nil
+}
+
 func (c *testOSIOClient) GetSpaceByID(ctx context.Context, spaceID uuid.UUID) (*app.Space, error) {
 	var spaceName *string
 	uuidString := spaceID.String()

controller/pipelines.go

@@ -0,0 +1,64 @@
+package controller
+
+import (
+	"github.com/goadesign/goa"
+	errs "github.com/pkg/errors"
+	"github.com/fabric8-services/fabric8-wit/configuration"
+	"github.com/fabric8-services/fabric8-wit/app"
+	"github.com/fabric8-services/fabric8-wit/jsonapi"
+	"github.com/fabric8-services/fabric8-wit/log"
+	"github.com/fabric8-services/fabric8-wit/errors"
+)
+
+// pipeline implements the pipeline resource.
+type PipelinesController struct {
+	*goa.Controller
+	Config *configuration.Registry
+	ClientGetter
+}
+
+func NewPipelineController(service *goa.Service, config *configuration.Registry) *PipelinesController {
+	return &PipelinesController{
+		Controller: service.NewController("PipelinesController"),
+		Config:     config,
+		ClientGetter: &defaultClientGetter{
+			config: config,
+		},
+	}
+}
+
+// Delete a pipelines from given space
+func (c *PipelinesController) Delete(ctx *app.DeletePipelinesContext) error {
+
+	osioClient, err := c.GetAndCheckOSIOClient(ctx)
+	if err != nil {
+		return jsonapi.JSONErrorResponse(ctx, err)
+	}
+
+	k8sSpace, err := osioClient.GetNamespaceByType(ctx, nil, "user")
+	if err != nil {
+		return jsonapi.JSONErrorResponse(ctx, errs.Wrap(err, "unable to retrieve 'user' namespace"))
+	}
+	if k8sSpace == nil {
+		return jsonapi.JSONErrorResponse(ctx, errors.NewNotFoundError("namespace", "user"))
+	}
+
+	osc, err := c.GetOSClient(ctx)
+	if err != nil {
+		return jsonapi.JSONErrorResponse(ctx, err)
+	}
+
+	userNS := *k8sSpace.Name
+	resp, err := osc.DeleteBuildConfig(userNS, map[string]string{"space": ctx.Space})
+	if err != nil {
+		log.Error(ctx, map[string]interface{}{
+			"err":        err,
+			"space_name": ctx.Space,
+		}, "error occurred while deleting pipeline")
+		return jsonapi.JSONErrorResponse(ctx, err)
+	}
+
+	log.Info(ctx, map[string]interface{}{"response": resp}, "deleted pipelines :")
+
+	return ctx.OK([]byte{})
+}