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Merge pull request #5 from celestiaorg/jose/watchdog-to-torch
feat: merge - watchdog to torch
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| package k8s | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
|
|
||
| log "github.com/sirupsen/logrus" | ||
| corev1 "k8s.io/api/core/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/client-go/kubernetes" | ||
| "k8s.io/client-go/rest" | ||
|
|
||
| "github.com/celestiaorg/torch/pkg/metrics" | ||
| ) | ||
|
|
||
| // RetrieveAndGenerateMetrics retrieves the list of Load Balancers and generates metrics | ||
| func RetrieveAndGenerateMetrics() ([]metrics.LoadBalancer, error) { | ||
| log.Info("Retrieving the list of Load Balancers") | ||
|
|
||
| // Get list of LBs | ||
| svc, err := ListServices() | ||
| if err != nil { | ||
| log.Error("Failed to retrieve the LoadBalancers: ", err) | ||
| return nil, err | ||
| } | ||
|
|
||
| // Get the list of the LBs | ||
| loadBalancers, err := GetLoadBalancers(svc) | ||
| if err != nil { | ||
| log.Error("Error getting the load balancers: ", err) | ||
| return nil, err | ||
| } | ||
|
|
||
| // Generate the metrics with the LBs | ||
| err = metrics.WithMetricsLoadBalancer(loadBalancers) | ||
| if err != nil { | ||
| log.Error("Failed to update metrics: ", err) | ||
| return nil, err | ||
| } | ||
|
|
||
| return loadBalancers, nil | ||
| } | ||
|
|
||
| // ListServices retrieves the list of services in a namespace | ||
| func ListServices() (*corev1.ServiceList, error) { | ||
| // Authentication in cluster - using Service Account, Role, RoleBinding | ||
| config, err := rest.InClusterConfig() | ||
| if err != nil { | ||
| log.Error("ERROR: ", err) | ||
| return nil, err | ||
| } | ||
|
|
||
| // Create the Kubernetes clientSet | ||
| clientSet, err := kubernetes.NewForConfig(config) | ||
| if err != nil { | ||
| log.Error("ERROR: ", err) | ||
| return nil, err | ||
| } | ||
|
|
||
| // Get all services in the namespace | ||
| services, err := clientSet.CoreV1().Services(GetCurrentNamespace()).List(context.Background(), metav1.ListOptions{}) | ||
| if err != nil { | ||
| log.Error("ERROR: ", err) | ||
| return nil, err | ||
| } | ||
|
|
||
| return services, nil | ||
| } | ||
|
|
||
| // GetLoadBalancers filters the list of services to include only Load Balancers and returns a list of them | ||
| func GetLoadBalancers(svc *corev1.ServiceList) ([]metrics.LoadBalancer, error) { | ||
| var loadBalancers []metrics.LoadBalancer | ||
|
|
||
| for _, svc := range svc.Items { | ||
| if svc.Spec.Type == corev1.ServiceTypeLoadBalancer { | ||
| for _, ingress := range svc.Status.LoadBalancer.Ingress { | ||
| log.Info(fmt.Sprintf("Updating metrics for service: [%s] with IP: [%s]", svc.Name, ingress.IP)) | ||
|
|
||
| // Create a LoadBalancer struct and append it to the loadBalancers list | ||
| loadBalancer := metrics.LoadBalancer{ | ||
| ServiceName: "torch", | ||
| LoadBalancerName: svc.Name, | ||
| LoadBalancerIP: ingress.IP, | ||
| Namespace: svc.Namespace, | ||
| Value: 1, // Set the value of the metric here (e.g., 1) | ||
| } | ||
| loadBalancers = append(loadBalancers, loadBalancer) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| if len(loadBalancers) == 0 { | ||
| return nil, errors.New("no Load Balancers found") | ||
| } | ||
|
|
||
| return loadBalancers, nil | ||
| } | ||
|
|
||
| // WatchServices watches for changes to the services in the specified namespace and updates the metrics accordingly | ||
| func WatchServices(done chan<- error) { | ||
| defer close(done) | ||
|
|
||
| // Authentication in cluster - using Service Account, Role, RoleBinding | ||
| config, err := rest.InClusterConfig() | ||
| if err != nil { | ||
| log.Error("Failed to get in-cluster config: ", err) | ||
| done <- err | ||
| return | ||
| } | ||
|
|
||
| // Create the Kubernetes clientSet | ||
| clientSet, err := kubernetes.NewForConfig(config) | ||
| if err != nil { | ||
| log.Error("Failed to create Kubernetes clientSet: ", err) | ||
| done <- err | ||
| return | ||
| } | ||
|
|
||
| // Create a service watcher | ||
| watcher, err := clientSet.CoreV1().Services(GetCurrentNamespace()).Watch(context.Background(), metav1.ListOptions{}) | ||
| if err != nil { | ||
| log.Error("Failed to create service watcher: ", err) | ||
| done <- err | ||
| return | ||
| } | ||
|
|
||
| // Watch for events on the watcher channel | ||
| for event := range watcher.ResultChan() { | ||
| if service, ok := event.Object.(*corev1.Service); ok { | ||
| if service.Spec.Type == corev1.ServiceTypeLoadBalancer { | ||
| loadBalancers, err := GetLoadBalancers(&corev1.ServiceList{Items: []corev1.Service{*service}}) | ||
| if err != nil { | ||
| log.Error("Failed to get the load balancers metrics: %v", err) | ||
| done <- err | ||
| return | ||
| } | ||
|
|
||
| if err := metrics.WithMetricsLoadBalancer(loadBalancers); err != nil { | ||
| log.Error("Failed to update metrics with load balancers: ", err) | ||
| done <- err | ||
| return | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } |
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