mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-09-21 08:45:46 +00:00
87 lines
2.9 KiB
Go
87 lines
2.9 KiB
Go
/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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/*
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Package kubernetes provides functions to interact with a Kubernetes cluster to the CLI.
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The package should be used for:
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- Fetching status information about the cluster
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- Creating, deleting, or migrating resources not managed by Helm
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The package should not be used for anything that doesn't just require the Kubernetes API.
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For example, Terraform and Helm actions should not be accessed by this package.
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*/
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package kubernetes
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import (
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"context"
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"fmt"
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"github.com/edgelesssys/constellation/v2/internal/constants"
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corev1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/kubernetes"
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"k8s.io/client-go/tools/clientcmd"
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)
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func newClient(kubeconfigPath string) (kubernetes.Interface, error) {
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kubeConfig, err := clientcmd.BuildConfigFromFlags("", kubeconfigPath)
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if err != nil {
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return nil, fmt.Errorf("building kubernetes config: %w", err)
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}
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kubeClient, err := kubernetes.NewForConfig(kubeConfig)
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if err != nil {
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return nil, fmt.Errorf("setting up kubernetes client: %w", err)
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}
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return kubeClient, nil
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}
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// StableInterface is an interface to interact with stable resources.
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type StableInterface interface {
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GetConfigMap(ctx context.Context, name string) (*corev1.ConfigMap, error)
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UpdateConfigMap(ctx context.Context, configMap *corev1.ConfigMap) (*corev1.ConfigMap, error)
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CreateConfigMap(ctx context.Context, configMap *corev1.ConfigMap) (*corev1.ConfigMap, error)
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KubernetesVersion() (string, error)
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}
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// NewStableClient returns a new StableClient.
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func NewStableClient(kubeconfigPath string) (StableInterface, error) {
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client, err := newClient(kubeconfigPath)
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if err != nil {
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return nil, err
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}
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return &stableClient{client}, nil
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}
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type stableClient struct {
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client kubernetes.Interface
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}
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// GetConfigMap returns a ConfigMap given it's name.
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func (u *stableClient) GetConfigMap(ctx context.Context, name string) (*corev1.ConfigMap, error) {
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return u.client.CoreV1().ConfigMaps(constants.ConstellationNamespace).Get(ctx, name, metav1.GetOptions{})
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}
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// UpdateConfigMap updates the given ConfigMap.
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func (u *stableClient) UpdateConfigMap(ctx context.Context, configMap *corev1.ConfigMap) (*corev1.ConfigMap, error) {
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return u.client.CoreV1().ConfigMaps(constants.ConstellationNamespace).Update(ctx, configMap, metav1.UpdateOptions{})
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}
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// CreateConfigMap creates the given ConfigMap.
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func (u *stableClient) CreateConfigMap(ctx context.Context, configMap *corev1.ConfigMap) (*corev1.ConfigMap, error) {
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return u.client.CoreV1().ConfigMaps(constants.ConstellationNamespace).Create(ctx, configMap, metav1.CreateOptions{})
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}
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// KubernetesVersion returns the Kubernetes version of the cluster.
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func (u *stableClient) KubernetesVersion() (string, error) {
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serverVersion, err := u.client.Discovery().ServerVersion()
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if err != nil {
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return "", err
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}
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return serverVersion.GitVersion, nil
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}
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