v0.0.8 Release

.github/workflows/go.yml

@@ -7,10 +7,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-    - name: Set up Go 1.13
+    - name: Set up Go 1.14
       uses: actions/setup-go@v1
       with:
-        go-version: 1.13
+        go-version: 1.14
       id: go
 
     - name: Check out code into the Go module directory

README.md

@@ -8,7 +8,7 @@ This resource assumes that kubernetes deployment is executed by plain manifests(
 
 In addition to deploy(`kubectl apply`) operation, it also supports delete(`kubectl delete`) and undo(`kubectl rollout undo`) operations.
 
-This resource has been tested on 1.14 and 1.17 (probably works on 1.15 and 1.16).
+This resource has been tested on kubernetes v1.20.1 and concourse v6.7.2.
 
 ## Source Configuration
 
@@ -43,6 +43,8 @@ Deploys the watched resources to kubernetes using plain manifests or Kustomize o
 * `kustomize` - true if deploying by kustomize. Default to `false`.
 * `status_check_timeout` - The time(seconds) to wait for deployment to complete. Default to 5 minutes.
 * `command_timeout` - The time(seconds) to wait for kubectl apply or delete. Default to unlimited(0).
+* `diff` - true if using `kubectl diff`. Default to `false`.
+* `server_dry_run` - true if using `kubectl apply --dry-run=server`. Default to `false`.
 * `delete` - true if using `kubectl delete` operation. Default to `false`.
 * `undo` - true if using `kubectl rollout undo` operation(target resources are `watchedResources`). Default to `false`.
 
@@ -58,7 +60,7 @@ resource_types:
   type: docker-image
   source:
     repository: kudohn/concourse-k8s-resource
-    tag: 0.0.7
+    tag: 0.0.8
 ```
 
 ### `resources`
@@ -161,6 +163,32 @@ jobs:
       undo: true
 ```
 
+#### Deploy resources with server-dry-run
+
+```yaml
+jobs:
+- name: deploy-app
+  plan:
+  - get: repo
+  - put: k8s
+    params:
+      paths:
+      - repo/test/kustomize/overlays/prod
+      server_dry_run: true
+```
+#### Diff Resources manifests
+
+```yaml
+jobs:
+- name: deploy-app
+  plan:
+  - get: repo
+  - put: k8s
+    params:
+      paths:
+      - repo/test/kustomize/overlays/prod
+      diff: true
+```
 #### Delete Resources
 
 ```yaml

cmd/out/main.go

@@ -50,7 +50,7 @@ func main() {
 	if err := kubectl.RunCommand(factory, commandConfig); err != nil {
 		log.Fatalln("cannot run kubectl command", err)
 	}
-	if !request.Params.Delete {
+	if requireStatusCheck(request.Params) {
 		time.Sleep(5 * time.Second)
 		log.Println("check status for", request.Source.WatchResources)
 		if ok := k8s.CheckResourceStatus(clientset, request.Source.Namespace, request.Source.WatchResources, request.Params.StatusCheckTimeout); !ok {
@@ -66,24 +66,25 @@ func main() {
 	}
 }
 
+func requireStatusCheck(params models.OutParams) bool {
+	return !params.Delete && !params.ServerDryRun && !params.Diff
+}
+
 func createResponse(request models.OutRequest, clientset kubernetes.Interface) *models.OutResponse {
 
 	if request.Params.Delete {
 		// resources is deleted, so just return empty response
-		return &models.OutResponse{
-			Version:  models.Version{},
-			Metadata: nil,
-		}
+		return emptyResponse()
 	}
 
 	// apply or undo
 	version, err := k8s.GetCurrentVersion(&request.Source, clientset)
 	if err != nil {
-		log.Fatalln(err)
+		return emptyResponse()
 	}
 	metadatas, err := k8s.GenerateMetadatas(&request.Source, clientset)
 	if err != nil {
-		log.Fatalln(err)
+		return emptyResponse()
 	}
 
 	response := models.OutResponse{
@@ -93,6 +94,13 @@ func createResponse(request models.OutRequest, clientset kubernetes.Interface) *
 	return &response
 }
 
+func emptyResponse() *models.OutResponse {
+	return &models.OutResponse{
+		Version:  models.Version{},
+		Metadata: nil,
+	}
+}
+
 func toDiscoveryInterface(obj interface{}) discovery.DiscoveryInterface {
 	if discoveryIf, ok := obj.(discovery.DiscoveryInterface); ok {
 		return discoveryIf

go.mod

@@ -1,15 +1,15 @@
 module github.com/mamezou-tech/concourse-k8s-resource
 
-go 1.13
+go 1.14
 
 require (
-	github.com/aws/aws-lambda-go v1.13.3 // indirect
-	github.com/spf13/cobra v0.0.5
+	github.com/emicklei/go-restful v2.9.5+incompatible
+	github.com/spf13/cobra v1.1.1
 	github.com/spf13/pflag v1.0.5
-	github.com/stretchr/testify v1.4.0
-	k8s.io/api v0.17.0
-	k8s.io/apimachinery v0.17.0
-	k8s.io/cli-runtime v0.17.0
-	k8s.io/client-go v0.17.0
-	k8s.io/kubectl v0.17.0
+	github.com/stretchr/testify v1.6.1
+	k8s.io/api v0.20.1
+	k8s.io/apimachinery v0.20.1
+	k8s.io/cli-runtime v0.20.1
+	k8s.io/client-go v0.20.1
+	k8s.io/kubectl v0.20.1
 )

pkg/k8s/kubectl/apply_command_factory.go

@@ -15,6 +15,9 @@ func (*applyCommandFactory) create(config *CommandConfig) (commands []*Command,
 	setFlag(command, "record", "true")
 	setFlag(command, "timeout", strconv.Itoa(int(config.Params.CommandTimeout))+"s")
 	setManifestPath(command, config.Params)
+	if config.Params.ServerDryRun {
+		setFlag(command, "dry-run", "server")
+	}
 
 	commands = append(commands, &Command{command, []string{}})
 	return

pkg/k8s/kubectl/diff_command_factory.go

@@ -0,0 +1,45 @@
+package kubectl
+
+import (
+	"github.com/emicklei/go-restful/log"
+	"github.com/spf13/cobra"
+	"k8s.io/client-go/util/exec"
+	"k8s.io/kubectl/pkg/cmd/apply"
+	"k8s.io/kubectl/pkg/cmd/diff"
+	cmdutil "k8s.io/kubectl/pkg/cmd/util"
+)
+
+type diffCommandFactory struct{}
+
+var _ CommandFactory = &diffCommandFactory{}
+
+func (*diffCommandFactory) create(config *CommandConfig) (commands []*Command, err error) {
+	factory := createKubectlFactory(config)
+
+	options := diff.NewDiffOptions(config.Streams)
+	command := &cobra.Command{
+		Use:                   "diff",
+		DisableFlagsInUseLine: true,
+		Run: func(cmd *cobra.Command, args []string) {
+			cmdutil.CheckDiffErr(options.Complete(factory, cmd))
+			if err := options.Run(); err != nil {
+				// exit code == 1 -> there is difference(not error!)
+				if ee, ok := err.(exec.ExitError); ok && ee.ExitStatus() == 1 {
+					log.Printf("found difference!")
+					return
+				}
+				// exit with error code(>2)
+				log.Printf("ERR! %+v", err)
+				cmdutil.CheckDiffErr(err)
+			}
+		},
+	}
+	cmdutil.AddFilenameOptionFlags(command, &options.FilenameOptions, "contains the configuration to diff")
+	cmdutil.AddServerSideApplyFlags(command)
+	cmdutil.AddFieldManagerFlagVar(command, &options.FieldManager, apply.FieldManagerClientSideApply)
+
+	setManifestPath(command, config.Params)
+
+	commands = append(commands, &Command{command, []string{}})
+	return
+}

pkg/k8s/kubectl/runner.go

@@ -59,6 +59,8 @@ func NewCommandFactory(params *models.OutParams) CommandFactory {
 		return &undoCommandFactory{}
 	case params.Delete:
 		return &deleteCommandFactory{}
+	case params.Diff:
+		return &diffCommandFactory{}
 	default:
 		return &applyCommandFactory{}
 	}

pkg/k8s/kubectl/undo_command_factory.go

@@ -1,6 +1,7 @@
 package kubectl
 
 import (
+	"context"
 	"fmt"
 	"github.com/mamezou-tech/concourse-k8s-resource/pkg/k8s"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -24,7 +25,7 @@ func (*undoCommandFactory) create(config *CommandConfig) (commands []*Command, e
 		var args []string
 		switch {
 		case k8s.IsDeployment(resource.Kind):
-			d, err := config.Clientset.AppsV1().Deployments(config.Namespace).Get(resource.Name, metav1.GetOptions{})
+			d, err := config.Clientset.AppsV1().Deployments(config.Namespace).Get(context.TODO(), resource.Name, metav1.GetOptions{})
 			if err != nil {
 				return nil, err
 			}
@@ -40,11 +41,11 @@ func (*undoCommandFactory) create(config *CommandConfig) (commands []*Command, e
 			args = []string{fmt.Sprintf("%s/%s", "deployment", resource.Name)}
 
 		case k8s.IsStatefulSet(resource.Kind):
-			sts, err := config.Clientset.AppsV1().StatefulSets(config.Namespace).Get(resource.Name, metav1.GetOptions{})
+			sts, err := config.Clientset.AppsV1().StatefulSets(config.Namespace).Get(context.TODO(), resource.Name, metav1.GetOptions{})
 			if err != nil {
 				return nil, err
 			}
-			rev, err := config.Clientset.AppsV1().ControllerRevisions(config.Namespace).Get(sts.Status.CurrentRevision, metav1.GetOptions{})
+			rev, err := config.Clientset.AppsV1().ControllerRevisions(config.Namespace).Get(context.TODO(), sts.Status.CurrentRevision, metav1.GetOptions{})
 			if err != nil {
 				return nil, err
 			}

pkg/k8s/metadata_reader.go

@@ -1,6 +1,7 @@
 package k8s
 
 import (
+	"context"
 	appsv1 "k8s.io/api/apps/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/client-go/kubernetes"
@@ -19,7 +20,7 @@ type DeploymentReader struct {
 var _ MetadataReader = &DeploymentReader{}
 
 func NewDeploymentReader(clientset kubernetes.Interface, namespace string, name string) (*DeploymentReader, error) {
-	d, err := clientset.AppsV1().Deployments(namespace).Get(name, metav1.GetOptions{})
+	d, err := clientset.AppsV1().Deployments(namespace).Get(context.TODO(), name, metav1.GetOptions{})
 	if err != nil {
 		return nil, err
 	}
@@ -42,11 +43,11 @@ type StatefulSetReader struct {
 var _ MetadataReader = &StatefulSetReader{}
 
 func NewStatefulSetReader(clientset kubernetes.Interface, namespace string, name string) (*StatefulSetReader, error) {
-	sts, err := clientset.AppsV1().StatefulSets(namespace).Get(name, metav1.GetOptions{})
+	sts, err := clientset.AppsV1().StatefulSets(namespace).Get(context.TODO(), name, metav1.GetOptions{})
 	if err != nil {
 		return nil, err
 	}
-	rev, err := clientset.AppsV1().ControllerRevisions(namespace).Get(sts.Status.CurrentRevision, metav1.GetOptions{})
+	rev, err := clientset.AppsV1().ControllerRevisions(namespace).Get(context.TODO(), sts.Status.CurrentRevision, metav1.GetOptions{})
 	if err != nil {
 		return nil, err
 	}

pkg/k8s/status_checker.go

@@ -1,6 +1,7 @@
 package k8s
 
 import (
+	"context"
 	"fmt"
 	"github.com/mamezou-tech/concourse-k8s-resource/pkg/models"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -77,7 +78,7 @@ func (c *statusChecker) check() error {
 		var current int32
 		switch {
 		case IsDeployment(c.resource.Kind):
-			d, err := c.clientset.AppsV1().Deployments(c.namespace).Get(c.resource.Name, metav1.GetOptions{})
+			d, err := c.clientset.AppsV1().Deployments(c.namespace).Get(context.TODO(), c.resource.Name, metav1.GetOptions{})
 			if err != nil {
 				return err
 			}
@@ -97,7 +98,7 @@ func (c *statusChecker) check() error {
 				return nil
 			}
 		case IsStatefulSet(c.resource.Kind):
-			sts, err := c.clientset.AppsV1().StatefulSets(c.namespace).Get(c.resource.Name, metav1.GetOptions{})
+			sts, err := c.clientset.AppsV1().StatefulSets(c.namespace).Get(context.TODO(), c.resource.Name, metav1.GetOptions{})
 			if err != nil {
 				return err
 			}

pkg/k8s/status_checker_test.go

@@ -1,6 +1,7 @@
 package k8s
 
 import (
+	"context"
 	"github.com/mamezou-tech/concourse-k8s-resource/pkg/models"
 	"github.com/stretchr/testify/assert"
 	appv1 "k8s.io/api/apps/v1"
@@ -68,9 +69,9 @@ func TestCheckResourceStatus(t *testing.T) {
 	time.AfterFunc(1*time.Second, func() {
 		t.Log("ready for pod...")
 		app1rs.Status.ReadyReplicas = 3
-		clientset.AppsV1().ReplicaSets("test").Update(&app1rs)
+		clientset.AppsV1().ReplicaSets("test").Update(context.TODO(), &app1rs, metav1.UpdateOptions{})
 		app2.Status.ReadyReplicas = 2
-		clientset.AppsV1().StatefulSets("test").Update(&app2)
+		clientset.AppsV1().StatefulSets("test").Update(context.TODO(), &app2, metav1.UpdateOptions{})
 	})
 
 	ok := CheckResourceStatus(clientset, "test", resources, 5)

pkg/models/types.go

@@ -56,10 +56,14 @@ type OutParams struct {
 	StatusCheckTimeout int32 `json:"status_check_timeout"`
 	// if true, delete resources
 	Delete bool `json:"delete"`
-	// if true, rollback previous deployment
+	// if true, rollback to previous deployment
 	Undo bool `json:"undo"`
 	// kubectl timeout seconds
 	CommandTimeout int32 `json:"command_timeout"`
+	// if true, execute as dry-run=server
+	ServerDryRun bool `json:"server_dry_run"`
+	// if true, run diff command instead of apply
+	Diff bool `json:"diff"`
 }
 
 // concourse metadata

test/_internal.md

@@ -6,8 +6,8 @@
 kubectl create ns concourse
 helm repo add concourse https://concourse-charts.storage.googleapis.com/
 helm upgrade --install concourse concourse/concourse --namespace concourse \
-  --set persistence.worker.storageClass=openebs-cstor-sparse \
-  --set postgresql.persistence.storageClass=openebs-cstor-sparse
+  --set persistence.worker.storageClass=openebs-hostpath \
+  --set postgresql.persistence.storageClass=openebs-hostpath
 
 export POD_NAME=$(kubectl get pods --namespace concourse -l "app=concourse-web" -o jsonpath="{.items[0].metadata.name}")
 kubectl port-forward --namespace concourse $POD_NAME 8080:8080
@@ -39,4 +39,10 @@ cat test/json/out_request_undo_kustomize.json | go run cmd/out/main.go
 ## delete
 cat test/json/out_request_delete_plain.json | go run cmd/out/main.go
 cat test/json/out_request_delete_kustomize.json | go run cmd/out/main.go
+## dry-run
+cat test/json/out_request_dryrun_plain.json | go run cmd/out/main.go
+cat test/json/out_request_dryrun_kustomize.json | go run cmd/out/main.go
+## diff
+cat test/json/out_request_diff_plain.json | go run cmd/out/main.go
+cat test/json/out_request_diff_kustomize.json | go run cmd/out/main.go
 ```