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Merge pull request #31 from ahinvinith/kubviz
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "path/filepath" | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/kube-tarian/kubviz/model" | ||
| "github.com/nats-io/nats.go" | ||
| log "github.com/sirupsen/logrus" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/client-go/discovery" | ||
| "k8s.io/client-go/dynamic" | ||
| "k8s.io/client-go/tools/clientcmd" | ||
| "k8s.io/client-go/util/homedir" | ||
| ) | ||
|
|
||
| const ( | ||
| eventSubject_getall_resource = "METRICS.ketall" | ||
| ) | ||
|
|
||
| func PublishAllResources(result model.Resource, js nats.JetStreamContext) error { | ||
| metrics := result | ||
| metrics.ClusterName = ClusterName | ||
| metricsJson, _ := json.Marshal(metrics) | ||
| _, err := js.Publish(eventSubject_getall_resource, metricsJson) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| log.Printf("Metrics with resource %s in the %s namespace has been published", result.Resource, result.Namespace) | ||
| return nil | ||
| } | ||
|
|
||
| func GetAllResources(js nats.JetStreamContext, wg *sync.WaitGroup, errCh chan error) { | ||
| defer wg.Done() | ||
| // TODO:should be removed after testing | ||
| var kubeconfig string | ||
| if home := homedir.HomeDir(); home != "" { | ||
| kubeconfig = filepath.Join(home, ".kube", "dev-config") | ||
| } | ||
|
|
||
| // Build the configuration from the kubeconfig file | ||
| config, err := clientcmd.BuildConfigFromFlags("", kubeconfig) | ||
| if err != nil { | ||
| log.Error(err) | ||
| errCh <- err | ||
| } | ||
| // TODO:upto here delete | ||
| // TODO:Production code: | ||
| // config, err := rest.InClusterConfig() | ||
| // if err != nil { | ||
| // panic(err.Error()) | ||
| // } | ||
| // TODO: upto this uncomment for production | ||
| // Create a new discovery client to discover all resources in the cluster | ||
| dc := discovery.NewDiscoveryClientForConfigOrDie(config) | ||
|
|
||
| // Create a new dynamic client to list resources in the cluster | ||
| dynamicClient, err := dynamic.NewForConfig(config) | ||
| if err != nil { | ||
| log.Error(err) | ||
| errCh <- err | ||
| } | ||
| // Get a list of all available API groups and versions in the cluster | ||
| resourceLists, err := dc.ServerPreferredResources() | ||
| if err != nil { | ||
| log.Error(err) | ||
| errCh <- err | ||
| } | ||
| gvrs, err := discovery.GroupVersionResources(resourceLists) | ||
| if err != nil { | ||
| panic(err) | ||
| errCh <- err | ||
| } | ||
| // Iterate over all available API groups and versions and list all resources in each group | ||
| for gvr := range gvrs { | ||
| // List all resources in the group | ||
| list, err := dynamicClient.Resource(gvr).Namespace("").List(context.Background(), metav1.ListOptions{}) | ||
| if err != nil { | ||
| // fmt.Printf("Error listing %s: %v\n", gvr.String(), err) | ||
| continue | ||
| } | ||
|
|
||
| for _, item := range list.Items { | ||
| age := time.Since(item.GetCreationTimestamp().Time).Round(time.Second).String() | ||
| var resource model.Resource | ||
| if item.GetNamespace() == "" { | ||
| resource = model.Resource{ | ||
| Resource: item.GetName(), | ||
| Namespace: "Default", | ||
| Age: age, | ||
| } | ||
| } else { | ||
| resource = model.Resource{ | ||
| Resource: item.GetName(), | ||
| Namespace: item.GetNamespace(), | ||
| Age: age, | ||
| } | ||
|
|
||
| } | ||
| err := PublishAllResources(resource, js) | ||
| if err != nil { | ||
| errCh <- err | ||
| } | ||
| } | ||
| } | ||
| errCh <- nil | ||
| } |
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