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agent: api: rest: Add Kubernetes information
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| package infra | ||
|
|
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| import ( | ||
| "os" | ||
| "path/filepath" | ||
|
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| "k8s.io/client-go/kubernetes" | ||
| // "k8s.io/client-go/rest" | ||
| "k8s.io/client-go/tools/clientcmd" | ||
| ) | ||
|
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| func GetClientSet() (*kubernetes.Clientset, error) { | ||
|
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| configPath := filepath.Join(os.Getenv("HOME"), ".kube", "config") | ||
| config, err := clientcmd.BuildConfigFromFlags("", configPath) | ||
| if err != nil { | ||
| panic(err.Error()) | ||
| } | ||
|
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| clientset, err := kubernetes.NewForConfig(config) | ||
| if err != nil { | ||
| panic(err.Error()) | ||
| } | ||
|
|
||
| return clientset, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| package infra | ||
|
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| import ( | ||
| "errors" | ||
| "sync" | ||
|
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| "github.com/cloud-barista/cm-honeybee/agent/pkg/api/rest/model/onprem/kubernetes" | ||
| ) | ||
|
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| var kubernetesInfoLock sync.Mutex | ||
|
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| func GetKubernetesInfo() (*kubernetes.Kubernetes, error) { | ||
| if !kubernetesInfoLock.TryLock() { | ||
| return nil, errors.New("kubernetes info collection is in progress") | ||
| } | ||
| defer func() { | ||
| kubernetesInfoLock.Unlock() | ||
| }() | ||
|
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| var i kubernetes.Kubernetes | ||
| var err error | ||
|
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| i.Nodes, err = GetNodeInfo() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| i.Workloads, err = GetWorkloadInfo() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| return &i, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| package infra | ||
|
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| import ( | ||
| "context" | ||
| "fmt" | ||
|
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| "github.com/cloud-barista/cm-honeybee/agent/pkg/api/rest/common" | ||
| "github.com/cloud-barista/cm-honeybee/agent/pkg/api/rest/model/onprem/kubernetes" | ||
|
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| "github.com/jollaman999/utils/logger" | ||
|
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| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| ) | ||
|
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| func GetNodeInfo() ([]kubernetes.Node, error) { | ||
| clientset, err := GetClientSet() | ||
| if err != nil { | ||
| logger.Println(logger.ERROR, true, "Kubernetes Connection Error: "+err.Error()) | ||
| return []kubernetes.Node{}, err | ||
| } | ||
|
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| objects, err := clientset.CoreV1().Nodes().List(context.TODO(), metav1.ListOptions{}) | ||
| if err != nil { | ||
| logger.Println(logger.ERROR, true, "Nodes: "+err.Error()) | ||
| return []kubernetes.Node{}, err | ||
| } | ||
|
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| nodeMap, err := common.Unmarshal(objects) | ||
| if err != nil { | ||
| logger.Println(logger.ERROR, true, "Error unmarshaling nodes: "+err.Error()) | ||
| return []kubernetes.Node{}, err | ||
| } | ||
|
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| ObjectCnt := len(objects.Items) | ||
|
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| var nodes []kubernetes.Node | ||
|
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| for i := 0; i < ObjectCnt; i++ { | ||
| node := kubernetes.Node{ | ||
| Name: common.GoJq(nodeMap, fmt.Sprintf(".items[%d].metadata.name", i)), | ||
| Labels: common.GoJq(nodeMap, fmt.Sprintf(".items[%d].metadata.labels", i)), | ||
| Addresses: common.GoJq(nodeMap, fmt.Sprintf(".items[%d].status.addresses[]", i)), | ||
| NodeInfo: common.GoJq(nodeMap, fmt.Sprintf(".items[%d].status.nodeInfo", i)), | ||
| } | ||
| nodes = append(nodes, node) | ||
| } | ||
|
|
||
| return nodes, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,163 @@ | ||
| package infra | ||
|
|
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| import ( | ||
| "context" | ||
| "fmt" | ||
| "reflect" | ||
| "strings" | ||
|
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| "github.com/cloud-barista/cm-honeybee/agent/pkg/api/rest/common" | ||
|
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| "github.com/jollaman999/utils/logger" | ||
|
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| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| ) | ||
|
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| var kindList = []string{ | ||
| "namespaces", | ||
| "pods", | ||
| "services", | ||
| "deployments", | ||
| "daemonsets", | ||
| "replicasets", | ||
| "statefulsets", | ||
| "job", | ||
| "cronjobs", | ||
| "ingresses", | ||
| "persistentvolumes", | ||
| "persistentvolumeclaims", | ||
| "storageclasses", | ||
| "configmaps", | ||
| "servicesaccounts", | ||
| "secrets", | ||
| "roles", | ||
| "rolebindings", | ||
| "clusterroles", | ||
| "clusterrolebindings", | ||
| } | ||
|
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| var clientFilter = map[string]string{ | ||
| "namespaces": "CoreV1.Namespaces", | ||
| "pods": "CoreV1.Pods.\"\"", | ||
| "services": "CoreV1.Services.\"\"", | ||
| "configmaps": "CoreV1.ConfigMaps.\"\"", | ||
| "servicesaccounts": "CoreV1.ServiceAccounts.\"\"", | ||
| "secrets": "CoreV1.Secrets.\"\"", | ||
| "persistentvolumes": "CoreV1.PersistentVolumes", | ||
| "persistentvolumeclaims": "CoreV1.PersistentVolumeClaims.\"\"", | ||
| "deployments": "AppsV1.Deployments.\"\"", | ||
| "daemonsets": "AppsV1.DaemonSets.\"\"", | ||
| "replicasets": "AppsV1.ReplicaSets.\"\"", | ||
| "statefulsets": "AppsV1.StatefulSets.\"\"", | ||
| "job": "BatchV1.Jobs.\"\"", | ||
| "cronjobs": "BatchV1.CronJobs.\"\"", | ||
| "ingresses": "NetworkingV1.Ingresses.\"\"", | ||
| "storageclasses": "StorageV1.StorageClasses", | ||
| } | ||
|
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| func GetWorkloadInfo() (map[string]interface{}, error) { | ||
| workloads := make(map[string]interface{}) | ||
|
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| for _, kind := range kindList { | ||
| if clientMethod, exists := clientFilter[kind]; exists { | ||
| objects, err := callClientMethod(clientMethod) | ||
| if err != nil { | ||
| logger.Println(logger.ERROR, true, fmt.Sprintf("Error fetching %s: %s", kind, err.Error())) | ||
| continue | ||
| } | ||
|
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| processObjects(kind, objects, workloads) | ||
| } | ||
| } | ||
|
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| return workloads, nil | ||
| } | ||
|
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| func callClientMethod(methodName string) (interface{}, error) { | ||
| clientset, err := GetClientSet() | ||
| if err != nil { | ||
| logger.Println(logger.ERROR, true, "Kubernetes Connection Error: "+err.Error()) | ||
| return nil, err | ||
| } | ||
|
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| methods := strings.Split(methodName, ".") | ||
| var result reflect.Value = reflect.ValueOf(clientset) | ||
|
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| for _, method := range methods { | ||
| if method == "\"\"" { | ||
| // 빈 문자열 인자로 메소드 호출 | ||
| result = result.Call([]reflect.Value{reflect.ValueOf("")})[0] | ||
| } else { | ||
| result = result.MethodByName(method) | ||
| if !result.IsValid() { | ||
| return nil, fmt.Errorf("invalid method: %s in %s", method, methodName) | ||
| } | ||
| if result.Type().NumIn() == 0 { | ||
| result = result.Call(nil)[0] | ||
| } | ||
| } | ||
| } | ||
|
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| listMethod := result.MethodByName("List") | ||
| if !listMethod.IsValid() { | ||
| return nil, fmt.Errorf("invalid List method for: %s", methodName) | ||
| } | ||
|
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| results := listMethod.Call([]reflect.Value{ | ||
| reflect.ValueOf(context.TODO()), | ||
| reflect.ValueOf(metav1.ListOptions{}), | ||
| }) | ||
|
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| if len(results) != 2 { | ||
| return nil, fmt.Errorf("unexpected number of return values") | ||
| } | ||
|
|
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| if !results[1].IsNil() { | ||
| return nil, results[1].Interface().(error) | ||
| } | ||
|
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| return results[0].Interface(), nil | ||
| } | ||
|
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| func processObjects(kind string, objects interface{}, workloads map[string]interface{}) { | ||
|
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| objectMap, err := common.Unmarshal(objects) | ||
| if err != nil { | ||
| logger.Println(logger.ERROR, true, fmt.Sprintf("Error unmarshaling %s: %s", kind, err.Error())) | ||
| return | ||
| } | ||
|
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| items := common.GoJq(objectMap, ".items") | ||
| objectCnt := 0 | ||
| if itemsSlice, ok := items.([]interface{}); ok { | ||
| objectCnt = len(itemsSlice) | ||
| } | ||
|
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| var newStruct []map[string]interface{} | ||
|
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| for i := 0; i < objectCnt; i++ { | ||
| item := make(map[string]interface{}) | ||
|
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| if namespace := common.GoJq(objectMap, fmt.Sprintf(".items[%d].metadata.namespace", i)); namespace != nil { | ||
| item["Namespace"] = namespace | ||
| } | ||
| if name := common.GoJq(objectMap, fmt.Sprintf(".items[%d].metadata.name", i)); name != nil { | ||
| item["Name"] = name | ||
| } | ||
| if svcType := common.GoJq(objectMap, fmt.Sprintf(".items[%d].spec.type", i)); svcType != nil { | ||
| item["Type"] = svcType | ||
| } | ||
| if svcClusterIp := common.GoJq(objectMap, fmt.Sprintf(".items[%d].spec.clusterIP", i)); svcClusterIp != nil { | ||
| item["ClusterIP"] = svcClusterIp | ||
| } | ||
| if status := common.GoJq(objectMap, fmt.Sprintf(".items[%d].status.phase", i)); status != nil { | ||
| item["Status"] = status | ||
| } | ||
|
|
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| if len(item) > 0 { | ||
| newStruct = append(newStruct, item) | ||
| } | ||
| } | ||
|
|
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| workloads[kind] = newStruct | ||
| } |
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