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WIP: Adding dashboard directory for grafana dashboards and script to combine the dashboards #432

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11 changes: 9 additions & 2 deletions pkg/provider/k8s/k8s.go
Original file line number Diff line number Diff line change
Expand Up @@ -145,8 +145,11 @@ 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 {
err := provider.CreateGrafanaDashboardsConfigMap()
if err != nil {
return fmt.Errorf("error applying grafana dashboards config err:%v", err)
}

var err error
for _, deployment := range deployments {
for _, resource := range deployment.Objects {
switch kind := strings.ToLower(resource.GetObjectKind().GroupVersionKind().Kind); kind {
Expand Down Expand Up @@ -190,14 +193,18 @@ func (c *K8s) ResourceApply(deployments []Resource) error {
}
}
}

return nil
}

// ResourceDelete deletes 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) ResourceDelete(deployments []Resource) error {
err := provider.DeleteGrafanaDashboardsConfigMap()
if err != nil {
return fmt.Errorf("error deleting grafana dashboards config err:%v", err)
}

var err error
for _, deployment := range deployments {
for _, resource := range deployment.Objects {
switch kind := strings.ToLower(resource.GetObjectKind().GroupVersionKind().Kind); kind {
Expand Down
78 changes: 78 additions & 0 deletions pkg/provider/provider.go
Original file line number Diff line number Diff line change
Expand Up @@ -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"
Expand Down Expand Up @@ -138,3 +144,75 @@ func MergeDeploymentVars(ms ...map[string]string) map[string]string {
}
return res
}

func getK8sClientSet() (*kubernetes.Clientset, error) {
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We already have the clientset at pkg/provider/k8s/k8s.go :)

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 err
}
PromBench, err := ioutil.ReadFile("manifests/dashboards/prombench.json")
if err != nil {
return err
}

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 err
}

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
}
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