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83 lines
3.1 KiB
Go
83 lines
3.1 KiB
Go
/*
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Copyright 2019 The Kubernetes 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 volumescheduling
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import (
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"context"
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"time"
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v1 "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/util/wait"
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clientset "k8s.io/client-go/kubernetes"
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podutil "k8s.io/kubernetes/pkg/api/v1/pod"
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)
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// waitForPodToScheduleWithTimeout waits for a pod to get scheduled and returns
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// an error if it does not scheduled within the given timeout.
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func waitForPodToScheduleWithTimeout(cs clientset.Interface, pod *v1.Pod, timeout time.Duration) error {
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return wait.Poll(100*time.Millisecond, timeout, podScheduled(cs, pod.Namespace, pod.Name))
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}
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// waitForPodToSchedule waits for a pod to get scheduled and returns an error if
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// it does not get scheduled within the timeout duration (30 seconds).
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func waitForPodToSchedule(cs clientset.Interface, pod *v1.Pod) error {
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return waitForPodToScheduleWithTimeout(cs, pod, 30*time.Second)
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}
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// waitForPodUnscheduleWithTimeout waits for a pod to fail scheduling and returns
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// an error if it does not become unschedulable within the given timeout.
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func waitForPodUnschedulableWithTimeout(cs clientset.Interface, pod *v1.Pod, timeout time.Duration) error {
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return wait.Poll(100*time.Millisecond, timeout, podUnschedulable(cs, pod.Namespace, pod.Name))
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}
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// waitForPodUnschedule waits for a pod to fail scheduling and returns
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// an error if it does not become unschedulable within the timeout duration (30 seconds).
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func waitForPodUnschedulable(cs clientset.Interface, pod *v1.Pod) error {
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return waitForPodUnschedulableWithTimeout(cs, pod, 30*time.Second)
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}
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// podScheduled returns true if a node is assigned to the given pod.
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func podScheduled(c clientset.Interface, podNamespace, podName string) wait.ConditionFunc {
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return func() (bool, error) {
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pod, err := c.CoreV1().Pods(podNamespace).Get(context.TODO(), podName, metav1.GetOptions{})
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if err != nil {
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// This could be a connection error so we want to retry.
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return false, nil
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}
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if pod.Spec.NodeName == "" {
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return false, nil
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}
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return true, nil
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}
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}
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// podUnschedulable returns a condition function that returns true if the given pod
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// gets unschedulable status.
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func podUnschedulable(c clientset.Interface, podNamespace, podName string) wait.ConditionFunc {
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return func() (bool, error) {
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pod, err := c.CoreV1().Pods(podNamespace).Get(context.TODO(), podName, metav1.GetOptions{})
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if err != nil {
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// This could be a connection error so we want to retry.
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return false, nil
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}
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_, cond := podutil.GetPodCondition(&pod.Status, v1.PodScheduled)
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return cond != nil && cond.Status == v1.ConditionFalse &&
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cond.Reason == v1.PodReasonUnschedulable, nil
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}
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}
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