Created
April 25, 2023 12:34
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Azure AKS AAD auth
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package main | |
import ( | |
"context" | |
"fmt" | |
"github.com/Azure/azure-sdk-for-go/sdk/azcore/policy" | |
"github.com/Azure/azure-sdk-for-go/sdk/azidentity" | |
"github.com/Azure/azure-sdk-for-go/sdk/resourcemanager/containerservice/armcontainerservice/v2" | |
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | |
"k8s.io/client-go/kubernetes" | |
"k8s.io/client-go/tools/clientcmd" | |
k8s_api "k8s.io/client-go/tools/clientcmd/api" | |
) | |
func main() { | |
// get azure client | |
cred, err := azidentity.NewDefaultAzureCredential(nil) | |
if err != nil { | |
panic(err) | |
} | |
// get container service client | |
containerserviceClientFactory, err := armcontainerservice.NewClientFactory( | |
"<subscription-id>", cred, nil) | |
if err != nil { | |
panic(err) | |
} | |
client := containerserviceClientFactory.NewManagedClustersClient() | |
// get cluster kubeconfigs | |
ctx := context.Background() | |
res, err := client.ListClusterUserCredentials(ctx, "<resource-group", "<cluster>", | |
&armcontainerservice.ManagedClustersClientListClusterUserCredentialsOptions{}, | |
) | |
if err != nil { | |
panic(err) | |
} | |
// get a bearer token | |
token, err := cred.GetToken(ctx, policy.TokenRequestOptions{ | |
Scopes: []string{"6dae42f8-4368-4678-94ff-3960e28e3630"}}) | |
if err != nil { | |
panic(err) | |
} | |
// replace exec plugin with token | |
kubeconfig, err := clientcmd.Load(res.Kubeconfigs[0].Value) | |
authInfo := k8s_api.NewAuthInfo() | |
authInfo.Token = token.Token | |
kubeconfig.AuthInfos[kubeconfig.Contexts[kubeconfig.CurrentContext].AuthInfo] = authInfo | |
// get a k8s client | |
buf, err := clientcmd.Write(*kubeconfig) | |
restConfig, err := clientcmd.RESTConfigFromKubeConfig(buf) | |
if err != nil { | |
panic(err) | |
} | |
clientset, err := kubernetes.NewForConfig(restConfig) | |
if err != nil { | |
panic(err) | |
} | |
// list namespaces | |
ns, err := clientset.CoreV1().Namespaces().List(ctx, metav1.ListOptions{}) | |
if err != nil { | |
panic(err) | |
} | |
for _, n := range ns.Items { | |
fmt.Printf("%s\n", n.Name) | |
} | |
} |
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