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feat: Get restConfig supporting MSI and secret flow (Azure#14)
feat: Get hub restConfig from querying AAD TODO: refactor the code to support provider pattern
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| /* | ||
| Copyright (c) Microsoft Corporation. | ||
| Licensed under the MIT license. | ||
| */ | ||
| package configprovider | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "os" | ||
|
|
||
| "github.com/Azure/azure-sdk-for-go/sdk/azcore" | ||
| "github.com/Azure/azure-sdk-for-go/sdk/azcore/policy" | ||
| "github.com/Azure/azure-sdk-for-go/sdk/azidentity" | ||
| "go.goms.io/fleet/pkg/interfaces" | ||
| "k8s.io/client-go/rest" | ||
| ) | ||
|
|
||
| const ( | ||
| aksScope = "6dae42f8-4368-4678-94ff-3960e28e3630" | ||
| ) | ||
|
|
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| type azureAuthProvider struct{} | ||
|
|
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| func NewAzureAuthProvider() interfaces.AuthenticationProvider { | ||
| return &azureAuthProvider{} | ||
| } | ||
|
|
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| //GetConfig returns a RESTConfig which could be used to make request to the associated fleet' hub cluster. | ||
| func (obj *azureAuthProvider) GetConfig(ctx context.Context, hubServerAPIAddress string) (rest.Config, error) { | ||
| clusterIdentity := os.Getenv("cluster_identity") | ||
|
|
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| if clusterIdentity == "" { | ||
| return rest.Config{}, errors.New("cluster identity empty") | ||
| } | ||
|
|
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| if hubServerAPIAddress == "" { | ||
| return rest.Config{}, errors.New("hub server api address empty") | ||
| } | ||
|
|
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| opts := &azidentity.ManagedIdentityCredentialOptions{ID: azidentity.ClientID(clusterIdentity)} | ||
| credential, err := azidentity.NewManagedIdentityCredential(opts) | ||
|
|
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| if err != nil { | ||
| return rest.Config{}, err | ||
| } | ||
|
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| token, err := credential.GetToken(ctx, policy.TokenRequestOptions{ | ||
| Scopes: []string{aksScope}, | ||
| }) | ||
|
|
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| if err != nil { | ||
| return rest.Config{}, err | ||
| } | ||
|
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| emptyToken := azcore.AccessToken{} | ||
| if *(token) == emptyToken { | ||
| return rest.Config{}, errors.New("access token empty") | ||
| } | ||
|
|
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| return rest.Config{ | ||
| BearerToken: token.Token, | ||
| Host: hubServerAPIAddress, | ||
| TLSClientConfig: rest.TLSClientConfig{ | ||
| Insecure: true, // TODO (mng): Remove this line once server CA can be passed in as flag. | ||
| }, | ||
| }, nil | ||
| } |
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21 changes: 21 additions & 0 deletions
21
pkg/controllers/memberinternalmembercluster/utils/config.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| package utils | ||
|
|
||
| import ( | ||
| "github.com/pkg/errors" | ||
| v1 "k8s.io/api/core/v1" | ||
| "k8s.io/client-go/rest" | ||
| "k8s.io/client-go/tools/clientcmd" | ||
| ) | ||
|
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| func GetConfigWithSecret(secret v1.Secret) (rest.Config, error) { | ||
| kubeConfig, ok := secret.Data["kubeconfig"] | ||
| if !ok || len(kubeConfig) == 0 { | ||
| return rest.Config{}, errors.New("secret does not contain kubeconfig") | ||
| } | ||
| restConfig, err := clientcmd.RESTConfigFromKubeConfig(kubeConfig) | ||
| if err != nil { | ||
| return rest.Config{}, err | ||
| } | ||
|
|
||
| return *(restConfig), nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,11 @@ | ||
| package interfaces | ||
|
|
||
| import ( | ||
| "context" | ||
|
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| "k8s.io/client-go/rest" | ||
| ) | ||
|
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| type AuthenticationProvider interface { | ||
| GetConfig(ctx context.Context, hubServerAPIAddress string) (rest.Config, error) | ||
| } |