Moving grafana-dashbaord configmap to dashboards directory with specific json file. Adding create and delete configmap function to combine prombench.json and node-metrics.json into an single configmap

Signed-off-by: Raj Babu Das <[email protected]>

Author: imrajdas

pkg/provider/k8s/k8s.go

@@ -145,8 +145,13 @@ func (c *K8s) DeploymentsParse(*kingpin.ParseContext) error {
 // ResourceApply applies k8s objects.
 // The input is a slice of structs containing the filename and the slice of k8s objects present in the file.
 func (c *K8s) ResourceApply(deployments []Resource) error {
-
 	var err error
+
+	err = provider.CreateGrafanaDashboardsConfigMap()
+	if err != nil {
+		return fmt.Errorf("error applying grafana dashboards config err:%v", err)
+	}
+
 	for _, deployment := range deployments {
 		for _, resource := range deployment.Objects {
 			switch kind := strings.ToLower(resource.GetObjectKind().GroupVersionKind().Kind); kind {
@@ -190,6 +195,7 @@ func (c *K8s) ResourceApply(deployments []Resource) error {
 			}
 		}
 	}
+
 	return nil
 }
 
@@ -198,6 +204,12 @@ func (c *K8s) ResourceApply(deployments []Resource) error {
 func (c *K8s) ResourceDelete(deployments []Resource) error {
 
 	var err error
+
+	err = provider.DeleteGrafanaDashboardsConfigMap()
+	if err != nil {
+		return fmt.Errorf("error deleting grafana dashboards config err:%v", err)
+	}
+
 	for _, deployment := range deployments {
 		for _, resource := range deployment.Objects {
 			switch kind := strings.ToLower(resource.GetObjectKind().GroupVersionKind().Kind); kind {

pkg/provider/provider.go

@@ -15,8 +15,14 @@ package provider
 
 import (
 	"bytes"
+	"context"
+	"flag"
 	"fmt"
 	"io/ioutil"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/tools/clientcmd"
 	"log"
 	"os"
 	"path/filepath"
@@ -39,6 +45,8 @@ type DeploymentResource struct {
 	FlagDeploymentVars map[string]string
 	// Default DeploymentVars.
 	DefaultDeploymentVars map[string]string
+	// Dashboards
+	Dashboards map[string]string
 }
 
 // NewDeploymentResource returns DeploymentResource with default values.
@@ -138,3 +146,75 @@ func MergeDeploymentVars(ms ...map[string]string) map[string]string {
 	}
 	return res
 }
+
+func getK8sClientSet() (*kubernetes.Clientset, error) {
+	kubeconfig := flag.String("kubeconfig", "/home/raj/.kube/config", "absolute path to the kubeconfig file")
+
+	config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
+	if err != nil {
+		return nil, err
+	}
+
+	clientset, err := kubernetes.NewForConfig(config)
+	if err != nil {
+		return nil, err
+	}
+	return clientset, nil
+}
+
+func CreateGrafanaDashboardsConfigMap() error {
+
+	clientset, err := getK8sClientSet()
+	if err != nil {
+		return err
+	}
+
+	NodeMetrics, err := ioutil.ReadFile("manifests/dashboards/node-metrics.json")
+	if err != nil {
+		return nil
+	}
+	PromBench, err := ioutil.ReadFile("manifests/dashboards/prombench.json")
+	if err != nil {
+		return nil
+	}
+
+	ConfigMapData := map[string]string{
+		"node-metrics.json": string(NodeMetrics),
+		"prombench.json":    string(PromBench),
+	}
+
+	newConfigMap := corev1.ConfigMap{
+		TypeMeta: metav1.TypeMeta{
+			Kind:       "ConfigMap",
+			APIVersion: "v1",
+		},
+		ObjectMeta: metav1.ObjectMeta{
+			Name: "grafana-dashboards",
+		},
+		Data: ConfigMapData,
+	}
+
+	_, err = clientset.CoreV1().ConfigMaps("default").Create(context.TODO(), &newConfigMap, metav1.CreateOptions{})
+	if err != nil {
+		return nil
+	}
+
+	log.Printf("resource created - kind: ConfigMap, name: grafana-dashboards")
+	return nil
+}
+
+func DeleteGrafanaDashboardsConfigMap() error {
+
+	clientset, err := getK8sClientSet()
+	if err != nil {
+		return err
+	}
+
+	err = clientset.CoreV1().ConfigMaps("default").Delete(context.TODO(), "grafana-dashboards", metav1.DeleteOptions{})
+	if err != nil {
+		return err
+	}
+
+	log.Printf("resource created - kind: ConfigMap, name: grafana-dashboards")
+	return nil
+}