Updates the local kubecontext with that of sandbox and switches to it (…

…#255) * Updates the local kubecontext with that of sandbox and switches to it Signed-off-by: Prafulla Mahindrakar <[email protected]> * Removed map delete Signed-off-by: Prafulla Mahindrakar <[email protected]> * Added context default for the sandbox test which is checked during context switch Signed-off-by: Prafulla Mahindrakar <[email protected]> * Moved copy context to k8s util Signed-off-by: Prafulla Mahindrakar <[email protected]> * Removing context during teardown Signed-off-by: Prafulla Mahindrakar <[email protected]>
flyteorg · Jan 4, 2022 · 37847d4 · 37847d4
1 parent a295428
commit 37847d4
Show file tree

Hide file tree

Showing 4 changed files with 104 additions and 6 deletions.
diff --git a/flytectl/cmd/sandbox/start.go b/flytectl/cmd/sandbox/start.go
@@ -27,6 +27,7 @@ import (
 	cmdCore "github.com/flyteorg/flytectl/cmd/core"
 	"github.com/flyteorg/flytectl/pkg/docker"
 	"github.com/flyteorg/flytectl/pkg/util"
+	"k8s.io/client-go/tools/clientcmd"
 )
 
 const (
@@ -70,6 +71,8 @@ Usage
 	sandboxSupportedVersion = "v0.10.0"
 	diskPressureTaint       = "node.kubernetes.io/disk-pressure"
 	taintEffect             = "NoSchedule"
+	sandboxContextName      = "flyte-sandbox"
+	sandboxDockerContext    = "default"
 )
 
 type ExecResult struct {
@@ -104,6 +107,10 @@ func startSandboxCluster(ctx context.Context, args []string, cmdCtx cmdCore.Comm
 		if err != nil {
 			return err
 		}
+		if err = updateLocalKubeContext(); err != nil {
+			return err
+		}
+
 		if err := watchFlyteDeployment(ctx, k8sClient.CoreV1()); err != nil {
 			return err
 		}
@@ -112,6 +119,17 @@ func startSandboxCluster(ctx context.Context, args []string, cmdCtx cmdCore.Comm
 	return nil
 }
 
+func updateLocalKubeContext() error {
+	localConfigAccess := clientcmd.NewDefaultPathOptions()
+
+	dockerConfigAccess := &clientcmd.PathOptions{
+		GlobalFile:   docker.Kubeconfig,
+		LoadingRules: clientcmd.NewDefaultClientConfigLoadingRules(),
+	}
+
+	return k8s.CopyKubeContext(dockerConfigAccess, localConfigAccess, sandboxDockerContext, sandboxContextName)
+}
+
 func startSandbox(ctx context.Context, cli docker.Docker, reader io.Reader) (*bufio.Scanner, error) {
 	fmt.Printf("%v Bootstrapping a brand new flyte cluster... %v %v\n", emoji.FactoryWorker, emoji.Hammer, emoji.Wrench)
 

diff --git a/flytectl/cmd/sandbox/start_test.go b/flytectl/cmd/sandbox/start_test.go
@@ -40,17 +40,17 @@ clusters:
       extension:
         audience: foo
         other: bar
-  name: foo-cluster
+  name: default
 contexts:
 - context:
-    cluster: foo-cluster
-    user: foo-user
+    cluster: default
+    user: default
     namespace: bar
-  name: foo-context
-current-context: foo-context
+  name: default
+current-context: default
 kind: Config
 users:
-- name: foo-user
+- name: default
   user:
     exec:
       apiVersion: client.authentication.k8s.io/v1alpha1

diff --git a/flytectl/cmd/sandbox/teardown.go b/flytectl/cmd/sandbox/teardown.go
@@ -12,6 +12,8 @@ import (
 	"github.com/enescakir/emoji"
 
 	cmdCore "github.com/flyteorg/flytectl/cmd/core"
+	"github.com/flyteorg/flytectl/pkg/k8s"
+	"k8s.io/client-go/tools/clientcmd"
 )
 
 const (
@@ -48,6 +50,14 @@ func tearDownSandbox(ctx context.Context, cli docker.Docker) error {
 	if err := configutil.ConfigCleanup(); err != nil {
 		fmt.Printf("Config cleanup failed. Which Failed due to %v \n ", err)
 	}
+	if err := removeSandboxKubeContext(); err != nil {
+		fmt.Printf("Kubecontext cleanup failed. Which Failed due to %v \n ", err)
+	}
 	fmt.Printf("%v %v Sandbox cluster is removed successfully. \n", emoji.Broom, emoji.Broom)
 	return nil
 }
+
+func removeSandboxKubeContext() error {
+	localConfigAccess := clientcmd.NewDefaultPathOptions()
+	return k8s.RemoveKubeContext(localConfigAccess, sandboxContextName)
+}
diff --git a/flytectl/pkg/k8s/k8s.go b/flytectl/pkg/k8s/k8s.go
@@ -1,12 +1,14 @@
 package k8s
 
 import (
+	"fmt"
 	"os"
 
 	"github.com/pkg/errors"
 	"k8s.io/client-go/kubernetes"
 	corev1 "k8s.io/client-go/kubernetes/typed/core/v1"
 	"k8s.io/client-go/tools/clientcmd"
+	clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
 )
 
 type K8s interface {
@@ -31,3 +33,71 @@ func GetK8sClient(cfg, master string) (K8s, error) {
 	}
 	return Client, nil
 }
+
+// CopyKubeContext copies context fromContext part of fromConfigAccess to toContext part of toConfigAccess.
+func CopyKubeContext(fromConfigAccess, toConfigAccess clientcmd.ConfigAccess, fromContext, toContext string) error {
+	_, err := toConfigAccess.GetStartingConfig()
+	if err != nil {
+		return err
+	}
+
+	fromStartingConfig, err := fromConfigAccess.GetStartingConfig()
+	if err != nil {
+		return err
+	}
+	_, exists := fromStartingConfig.Contexts[fromContext]
+	if !exists {
+		return fmt.Errorf("context %v doesn't exist", fromContext)
+	}
+
+	toStartingConfig, err := toConfigAccess.GetStartingConfig()
+	if err != nil {
+		return err
+	}
+
+	_, exists = toStartingConfig.Contexts[toContext]
+	if exists {
+		fmt.Printf("context %v already exist. Overwriting it\n", toContext)
+	} else {
+		toStartingConfig.Contexts[toContext] = clientcmdapi.NewContext()
+	}
+
+	toStartingConfig.Clusters[toContext] = fromStartingConfig.Clusters[fromContext]
+	toStartingConfig.Clusters[toContext].LocationOfOrigin = toConfigAccess.GetDefaultFilename()
+	toStartingConfig.AuthInfos[toContext] = fromStartingConfig.AuthInfos[fromContext]
+	toStartingConfig.AuthInfos[toContext].LocationOfOrigin = toConfigAccess.GetDefaultFilename()
+	toStartingConfig.Contexts[toContext].Cluster = toContext
+	toStartingConfig.Contexts[toContext].AuthInfo = toContext
+	toStartingConfig.CurrentContext = toContext
+
+	if err := clientcmd.ModifyConfig(toConfigAccess, *toStartingConfig, true); err != nil {
+		return err
+	}
+
+	fmt.Printf("context modified for %q and switched over to it.\n", toContext)
+	return nil
+}
+
+// RemoveKubeContext removes the contextToRemove from the kubeContext pointed to be fromConfigAccess
+func RemoveKubeContext(fromConfigAccess clientcmd.ConfigAccess, contextToRemove string) error {
+	fromStartingConfig, err := fromConfigAccess.GetStartingConfig()
+	if err != nil {
+		return err
+	}
+	_, exists := fromStartingConfig.Contexts[contextToRemove]
+	if !exists {
+		return fmt.Errorf("context %v doesn't exist", contextToRemove)
+	}
+
+	delete(fromStartingConfig.Clusters, contextToRemove)
+	delete(fromStartingConfig.AuthInfos, contextToRemove)
+	delete(fromStartingConfig.Contexts, contextToRemove)
+	fromStartingConfig.CurrentContext = ""
+
+	if err := clientcmd.ModifyConfig(fromConfigAccess, *fromStartingConfig, true); err != nil {
+		return err
+	}
+
+	fmt.Printf("context removed for %q.\n", contextToRemove)
+	return nil
+}