/
objects.go
190 lines (169 loc) · 5.68 KB
/
objects.go
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package k8s
import (
"context"
"encoding/json"
"errors"
"os"
"strings"
"github.com/litmuschaos/litmus/litmus-portal/cluster-agents/subscriber/pkg/graphql"
"github.com/litmuschaos/litmus/litmus-portal/cluster-agents/subscriber/pkg/types"
"github.com/litmuschaos/litmus/litmus-portal/cluster-agents/subscriber/pkg/workloads"
"github.com/sirupsen/logrus"
"k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/client-go/dynamic"
"k8s.io/client-go/kubernetes"
)
var (
AgentNamespace = os.Getenv("AGENT_NAMESPACE")
AgentScope = os.Getenv("AGENT_SCOPE")
)
//GetKubernetesObjects is used to get the Kubernetes Object details according to the request type
func GetKubernetesObjects(request types.KubeObjRequest) ([]*types.KubeObject, error) {
conf, err := GetKubeConfig()
if err != nil {
return nil, err
}
clientSet, err := kubernetes.NewForConfig(conf)
if err != nil {
return nil, err
}
_, dynamicClient, err := GetDynamicAndDiscoveryClient()
if err != nil {
return nil, err
}
var ObjData []*types.KubeObject
if len(request.Workloads) != 0 {
ObjData, err = getPodsFromWorkloads(request.Workloads, clientSet, dynamicClient)
if err != nil {
return nil, err
}
} else {
var gvrList []schema.GroupVersionResource
for _, req := range request.KubeGVRRequest {
resourceType := schema.GroupVersionResource{
Group: req.Group,
Version: req.Version,
Resource: req.Resource,
}
gvrList = append(gvrList, resourceType)
}
if strings.ToLower(AgentScope) == "namespace" {
dataList, err := GetObjectDataByNamespace(AgentNamespace, dynamicClient, gvrList)
if err != nil {
return nil, err
}
KubeObj := &types.KubeObject{
Namespace: AgentNamespace,
Data: dataList,
}
ObjData = append(ObjData, KubeObj)
} else {
namespace, err := clientSet.CoreV1().Namespaces().List(context.TODO(), v1.ListOptions{})
if err != nil {
return nil, err
}
if len(namespace.Items) > 0 {
for _, namespace := range namespace.Items {
dataList, err := GetObjectDataByNamespace(namespace.GetName(), dynamicClient, gvrList)
if err != nil {
return nil, err
}
KubeObj := &types.KubeObject{
Namespace: namespace.GetName(),
Data: dataList,
}
ObjData = append(ObjData, KubeObj)
}
} else {
return nil, errors.New("no namespace available")
}
}
}
kubeData, _ := json.Marshal(ObjData)
var kubeObjects []*types.KubeObject
err = json.Unmarshal(kubeData, &kubeObjects)
if err != nil {
return nil, err
}
return kubeObjects, nil
}
func getPodsFromWorkloads(resources []types.Workload, k8sClient *kubernetes.Clientset, dynamicClient dynamic.Interface) ([]*types.KubeObject, error) {
var ObjData []*types.KubeObject
podNsMap, err := workloads.GetPodsFromWorkloads(resources, k8sClient, dynamicClient)
if err != nil {
return nil, err
}
for ns, podList := range podNsMap {
var data []types.ObjectData
for _, pod := range podList {
data = append(data, types.ObjectData{
Name: pod,
Kind: "Pod",
})
}
ObjData = append(ObjData, &types.KubeObject{
Namespace: ns,
Data: data,
})
}
return ObjData, nil
}
//GetObjectDataByNamespace uses dynamic client to fetch Kubernetes Objects data.
func GetObjectDataByNamespace(namespace string, dynamicClient dynamic.Interface, gvrList []schema.GroupVersionResource) ([]types.ObjectData, error) {
var kubeObjects []types.ObjectData
for _, gvr := range gvrList {
list, err := dynamicClient.Resource(gvr).Namespace(namespace).List(context.TODO(), v1.ListOptions{})
if err != nil {
return kubeObjects, nil
}
for _, list := range list.Items {
listInfo := types.ObjectData{
Name: list.GetName(),
Kind: list.GetKind(),
Labels: list.GetLabels(),
}
kubeObjects = append(kubeObjects, listInfo)
}
}
return kubeObjects, nil
}
func GenerateKubeObject(cid string, accessKey, version string, kubeObjectRequest types.KubeObjRequest) ([]byte, error) {
clusterID := `{clusterID: \"` + cid + `\", version: \"` + version + `\", accessKey: \"` + accessKey + `\"}`
kubeObj, err := GetKubernetesObjects(kubeObjectRequest)
if err != nil {
return nil, err
}
processed, err := graphql.MarshalGQLData(kubeObj)
if err != nil {
return nil, err
}
mutation := `{ clusterID: ` + clusterID + `, requestID:\"` + kubeObjectRequest.RequestID + `\", kubeObj:\"` + processed[1:len(processed)-1] + `\"}`
var payload = []byte(`{"query":"mutation { kubeObj(request:` + mutation + ` )}"}`)
return payload, nil
}
//SendKubeObjects generates graphql mutation to send kubernetes objects data to graphql server
func SendKubeObjects(clusterData map[string]string, kubeObjectRequest types.KubeObjRequest) error {
// generate graphql payload
payload, err := GenerateKubeObject(clusterData["CLUSTER_ID"], clusterData["ACCESS_KEY"], clusterData["VERSION"], kubeObjectRequest)
if err != nil {
logrus.WithError(err).Print("Error while getting KubeObject Data")
clusterID := `{clusterID: \"` + clusterData["CLUSTER_ID"] + `\", version: \"` + clusterData["VERSION"] + `\", accessKey: \"` + clusterData["ACCESS_KEY"] + `\"}`
mutation := `{ clusterID: ` + clusterID + `, requestID:\"` + kubeObjectRequest.RequestID + `\", kubeObj:\"` + "failed to get kubeobjects" + `\"}`
var payload = []byte(`{"query":"mutation { kubeObj(request:` + mutation + ` )}"}`)
body, reqErr := graphql.SendRequest(clusterData["SERVER_ADDR"], payload)
if reqErr != nil {
logrus.Print(reqErr.Error())
return reqErr
}
logrus.Println("Response", body)
return err
}
body, err := graphql.SendRequest(clusterData["SERVER_ADDR"], payload)
if err != nil {
logrus.Print(err.Error())
return err
}
logrus.Println("Response", body)
return nil
}