mirror of
https://github.com/edgelesssys/constellation.git
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138 lines
3.8 KiB
Go
138 lines
3.8 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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package kubectl
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import (
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"context"
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"errors"
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"fmt"
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"github.com/edgelesssys/constellation/internal/kubernetes"
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corev1 "k8s.io/api/core/v1"
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"k8s.io/cli-runtime/pkg/resource"
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)
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// ErrKubeconfigNotSet is the error value returned by Kubectl.Apply when SetKubeconfig was not called first.
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var ErrKubeconfigNotSet = errors.New("kubeconfig not set")
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// Client wraps marshable k8s resources into resource.Info fields and applies them in a cluster.
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type Client interface {
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// ApplyOneObject applies a k8s resource similar to kubectl apply.
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ApplyOneObject(info *resource.Info, forceConflicts bool) error
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// GetObjects converts resources into prepared info fields for use in ApplyOneObject.
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GetObjects(resources kubernetes.Marshaler) ([]*resource.Info, error)
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CreateConfigMap(ctx context.Context, configMap corev1.ConfigMap) error
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AddTolerationsToDeployment(ctx context.Context, tolerations []corev1.Toleration, name string, namespace string) error
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AddNodeSelectorsToDeployment(ctx context.Context, selectors map[string]string, name string, namespace string) error
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// WaitForCRD waits for the given CRD to be established.
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WaitForCRD(ctx context.Context, crd string) error
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}
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// clientGenerator can generate new clients from a kubeconfig.
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type clientGenerator interface {
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NewClient(kubeconfig []byte) (Client, error)
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}
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// Kubectl implements kubernetes.Apply interface and acts like the Kubernetes "kubectl" tool.
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type Kubectl struct {
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clientGenerator
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kubeconfig []byte
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}
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// New creates a new kubectl using the real clientGenerator.
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func New() *Kubectl {
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return &Kubectl{
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clientGenerator: &generator{},
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}
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}
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// Apply will apply the given resources using server-side-apply.
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func (k *Kubectl) Apply(resources kubernetes.Marshaler, forceConflicts bool) error {
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if k.kubeconfig == nil {
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return ErrKubeconfigNotSet
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}
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client, err := k.clientGenerator.NewClient(k.kubeconfig)
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if err != nil {
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return err
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}
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// convert marshaler object into []*resource.info
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infos, err := client.GetObjects(resources)
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if err != nil {
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return err
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}
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// apply each object, one by one
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for i, resource := range infos {
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if err := client.ApplyOneObject(resource, forceConflicts); err != nil {
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return fmt.Errorf("kubectl apply of object %v/%v: %w", i+1, len(infos), err)
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}
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}
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return nil
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}
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// SetKubeconfig will store the kubeconfig to generate Clients using the clientGenerator later.
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func (k *Kubectl) SetKubeconfig(kubeconfig []byte) {
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k.kubeconfig = kubeconfig
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}
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func (k *Kubectl) CreateConfigMap(ctx context.Context, configMap corev1.ConfigMap) error {
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client, err := k.clientGenerator.NewClient(k.kubeconfig)
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if err != nil {
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return err
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}
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err = client.CreateConfigMap(ctx, configMap)
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if err != nil {
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return err
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}
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return nil
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}
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func (k *Kubectl) AddTolerationsToDeployment(ctx context.Context, tolerations []corev1.Toleration, name string, namespace string) error {
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client, err := k.clientGenerator.NewClient(k.kubeconfig)
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if err != nil {
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return err
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}
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if err = client.AddTolerationsToDeployment(ctx, tolerations, name, namespace); err != nil {
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return err
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}
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return nil
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}
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func (k *Kubectl) AddNodeSelectorsToDeployment(ctx context.Context, selectors map[string]string, name string, namespace string) error {
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client, err := k.clientGenerator.NewClient(k.kubeconfig)
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if err != nil {
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return err
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}
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if err = client.AddNodeSelectorsToDeployment(ctx, selectors, name, namespace); err != nil {
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return err
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}
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return nil
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}
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// WaitForCRD waits for a list of CRDs to be established.
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func (k *Kubectl) WaitForCRDs(ctx context.Context, crds []string) error {
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client, err := k.clientGenerator.NewClient(k.kubeconfig)
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if err != nil {
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return err
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}
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for _, crd := range crds {
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err = client.WaitForCRD(ctx, crd)
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if err != nil {
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return err
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}
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}
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return nil
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}
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