Support pre/post install/delete hooks

Update instance create and delete handler to support pre/post install/delete hooks. 

Add hook.go: to execute and delete hook (base on delete policy). 

Implement watchUntilReady in generic plugin to wait for readiness of hook rss.

Add hook_sorter.go: to sort hook based on weight.

User can define timeout for each type of hooks in overwrite-values. Variable name is k8s-rb-instance-pre-install-timeout (default 60s),
k8s-rb-instance-post-install-timeout (default 600s), k8s-rb-instance-pre-delete-timeout (default 60s) and k8s-rb-instance-post-delete-timeout (600s). This is timeout
for each hook of a hook event (not a total time).

Add recovery capability to continue the execution of instantiation (create or delete) when the plugin stop unexpectedly.
For now, this is disabled because we have data-race issue during test. Will enable when we find the solution.

Add basic test for hooks (in hook_test.go)

Add test for hook in instance_test

For instance get request, we can request for full data by adding query param to the request: full=true.

Issue-ID: MULTICLOUD-1347
Signed-off-by: hthieu <huu_trung.thieu@nokia-bell-labs.com>
Change-Id: If2b4a90831b9bfce1af8b926e4062a7d706bee08

1 files changed, 18 insertions, 1 deletions

diff --git a/src/k8splugin/plugins/service/plugin.go b/src/k8splugin/plugins/service/plugin.go
index 4837ea56..aa5c685c 100644
--- a/src/k8splugin/plugins/service/plugin.go
+++ b/src/k8splugin/plugins/service/plugin.go
@@ -1,5 +1,6 @@
 /*
 Copyright 2018 Intel Corporation.
+Copyright © 2021 Nokia Bell Labs.
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
@@ -15,17 +16,22 @@ package main
 
 import (
 	"context"
-	"github.com/onap/multicloud-k8s/src/k8splugin/internal/utils"
 	"log"
+	"time"
 
 	pkgerrors "github.com/pkg/errors"
 	coreV1 "k8s.io/api/core/v1"
 	metaV1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/apimachinery/pkg/api/meta"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/rest"
 
 	"github.com/onap/multicloud-k8s/src/k8splugin/internal/config"
 	"github.com/onap/multicloud-k8s/src/k8splugin/internal/helm"
 	"github.com/onap/multicloud-k8s/src/k8splugin/internal/plugin"
+	"github.com/onap/multicloud-k8s/src/k8splugin/internal/utils"
 )
 
 // Compile time check to see if servicePlugin implements the correct interface
@@ -37,6 +43,17 @@ var ExportedVariable servicePlugin
 type servicePlugin struct {
 }
 
+func (g servicePlugin) WatchUntilReady(
+	timeout time.Duration,
+	ns string,
+	res helm.KubernetesResource,
+	mapper meta.RESTMapper,
+	restClient rest.Interface,
+	objType runtime.Object,
+	clientSet kubernetes.Interface) error {
+	return pkgerrors.Errorf("This function is not implemented in this plugin")
+}
+
 // Create a service object in a specific Kubernetes cluster
 func (p servicePlugin) Create(yamlFilePath string, namespace string, client plugin.KubernetesConnector) (string, error) {
 	if namespace == "" {