mirror of https://github.com/dapr/cli.git
129 lines
3.7 KiB
Go
129 lines
3.7 KiB
Go
/*
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Copyright 2021 The Dapr Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package kubernetes
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import (
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"context"
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"errors"
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"fmt"
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"strings"
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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/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/watch"
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k8s "k8s.io/client-go/kubernetes"
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)
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const podWatchErrTemplate = "error creating pod watcher"
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var errPodUnknown error = errors.New("pod in unknown/failed state")
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func ListPodsInterface(client k8s.Interface, labelSelector map[string]string) (*corev1.PodList, error) {
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opts := metav1.ListOptions{}
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if labelSelector != nil {
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opts.LabelSelector = labels.FormatLabels(labelSelector)
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}
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return client.CoreV1().Pods(metav1.NamespaceAll).List(context.TODO(), opts)
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}
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func ListPods(client *k8s.Clientset, namespace string, labelSelector map[string]string) (*corev1.PodList, error) {
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opts := metav1.ListOptions{}
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if labelSelector != nil {
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opts.LabelSelector = labels.FormatLabels(labelSelector)
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}
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return client.CoreV1().Pods(namespace).List(context.TODO(), opts)
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}
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// CheckPodExists returns a boolean representing the pod's existence and the namespace that the given pod resides in,
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// or empty if not present in the given namespace.
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func CheckPodExists(client k8s.Interface, namespace string, labelSelector map[string]string, deployName string) (bool, string) {
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opts := metav1.ListOptions{}
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if labelSelector != nil {
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opts.LabelSelector = labels.FormatLabels(labelSelector)
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}
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podList, err := client.CoreV1().Pods(namespace).List(context.TODO(), opts)
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if err != nil {
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return false, ""
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}
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for _, pod := range podList.Items {
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if pod.Status.Phase == corev1.PodRunning {
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if strings.HasPrefix(pod.Name, deployName) {
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return true, pod.Namespace
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}
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}
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}
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return false, ""
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}
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func createPodWatcher(ctx context.Context, client k8s.Interface, namespace, appID string) (watch.Interface, error) {
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labelSelector := fmt.Sprintf("%s=%s", daprAppIDKey, appID)
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opts := metav1.ListOptions{
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TypeMeta: metav1.TypeMeta{},
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LabelSelector: labelSelector,
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}
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return client.CoreV1().Pods(namespace).Watch(ctx, opts)
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}
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func waitPodDeleted(ctx context.Context, client k8s.Interface, namespace, appID string) error {
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watcher, err := createPodWatcher(ctx, client, namespace, appID)
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if err != nil {
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return fmt.Errorf("%s : %w", podWatchErrTemplate, err)
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}
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defer watcher.Stop()
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for {
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select {
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case event := <-watcher.ResultChan():
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if event.Type == watch.Deleted {
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return nil
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}
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case <-ctx.Done():
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return fmt.Errorf("error context cancelled while waiting for pod deletion: %w", context.Canceled)
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}
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}
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}
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func waitPodRunning(ctx context.Context, client k8s.Interface, namespace, appID string) error {
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watcher, err := createPodWatcher(ctx, client, namespace, appID)
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if err != nil {
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return fmt.Errorf("%s : %w", podWatchErrTemplate, err)
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}
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defer watcher.Stop()
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for {
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select {
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case event := <-watcher.ResultChan():
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pod := event.Object.(*corev1.Pod)
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if pod.Status.Phase == corev1.PodRunning {
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return nil
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} else if pod.Status.Phase == corev1.PodFailed || pod.Status.Phase == corev1.PodUnknown {
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return fmt.Errorf("error waiting for pod run: %w", errPodUnknown)
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}
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case <-ctx.Done():
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return fmt.Errorf("error context cancelled while waiting for pod run: %w", context.Canceled)
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}
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}
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}
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