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Satya Ranjan Pradhan
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Feb 11, 2019
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| package client | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "github.com/Huawei-PaaS/CNI-Genie/utils" | ||
| "k8s.io/api/core/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| types "k8s.io/apimachinery/pkg/types" | ||
| "k8s.io/client-go/kubernetes" | ||
| restclient "k8s.io/client-go/rest" | ||
| "k8s.io/client-go/tools/clientcmd" | ||
| "os" | ||
| "strings" | ||
| ) | ||
|
|
||
| type ClientInterface interface { | ||
| GetPod(name, namespace string) (*v1.Pod, error) | ||
| PatchPod(name, namespace string, pt types.PatchType, data []byte) (*v1.Pod, error) | ||
| GetRaw(path string) ([]byte, error) | ||
| } | ||
|
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| type KubeClient struct { | ||
| kubernetes.Interface | ||
| } | ||
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| func (kc *KubeClient) GetPod(name, namespace string) (*v1.Pod, error) { | ||
| pod, err := kc.CoreV1().Pods(namespace).Get(name, metav1.GetOptions{}) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| return pod, nil | ||
| } | ||
|
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| func (kc *KubeClient) PatchPod(name, namespace string, pt types.PatchType, data []byte) (*v1.Pod, error) { | ||
| pod, err := kc.CoreV1().Pods(namespace).Patch(name, pt, data) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return pod, nil | ||
| } | ||
|
|
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| func (kc *KubeClient) GetRaw(path string) ([]byte, error) { | ||
| obj, err := kc.ExtensionsV1beta1().RESTClient().Get().AbsPath(path).DoRaw() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| return obj, nil | ||
| } | ||
|
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| // GetKubeClient creates a kubeclient from genie-kubeconfig file, | ||
| // default location is /etc/cni/net.d. | ||
| func BuildKubeClientFromConfig(conf *utils.GenieConf) (*KubeClient, error) { | ||
| config, err := buildKubeConfig(conf) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| // Create the clientset | ||
| kc, err := kubernetes.NewForConfig(config) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &KubeClient{kc}, nil | ||
| } | ||
|
|
||
| func buildKubeConfig(conf *utils.GenieConf) (*restclient.Config, error) { | ||
| // Some config can be passed in a kubeconfig file | ||
| kubeconfig := conf.Kubernetes.Kubeconfig | ||
|
|
||
| // Config can be overridden by config passed in explicitly in the network config. | ||
| configOverrides := &clientcmd.ConfigOverrides{} | ||
|
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| // If an API root is given, make sure we're using using the name / port rather than | ||
| // the full URL. Earlier versions of the config required the full `/api/v1/` extension, | ||
| // so split that off to ensure compatibility. | ||
| conf.Policy.K8sAPIRoot = strings.Split(conf.Policy.K8sAPIRoot, "/api/")[0] | ||
|
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| var overridesMap = []struct { | ||
| variable *string | ||
| value string | ||
| }{ | ||
| {&configOverrides.ClusterInfo.Server, conf.Policy.K8sAPIRoot}, | ||
| {&configOverrides.AuthInfo.ClientCertificate, conf.Policy.K8sClientCertificate}, | ||
| {&configOverrides.AuthInfo.ClientKey, conf.Policy.K8sClientKey}, | ||
| {&configOverrides.ClusterInfo.CertificateAuthority, conf.Policy.K8sCertificateAuthority}, | ||
| {&configOverrides.AuthInfo.Token, conf.Policy.K8sAuthToken}, | ||
| } | ||
|
|
||
| // Using the override map above, populate any non-empty values. | ||
| for _, override := range overridesMap { | ||
| if override.value != "" { | ||
| *override.variable = override.value | ||
| } | ||
| } | ||
|
|
||
| // Also allow the K8sAPIRoot to appear under the "kubernetes" block in the network config. | ||
| if conf.Kubernetes.K8sAPIRoot != "" { | ||
| configOverrides.ClusterInfo.Server = conf.Kubernetes.K8sAPIRoot | ||
| } | ||
|
|
||
| // Use the kubernetes client code to load the kubeconfig file and combine it with the overrides. | ||
| config, err := clientcmd.NewNonInteractiveDeferredLoadingClientConfig( | ||
| &clientcmd.ClientConfigLoadingRules{ExplicitPath: kubeconfig}, | ||
| configOverrides).ClientConfig() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| fmt.Fprintf(os.Stderr, "CNI Genie Kubernetes config %v\n", config) | ||
|
|
||
| return config, nil | ||
| } |
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