Ta-Ching ChenandGitHub
a4f58fbf10
Ensure pod is ready by checking pod’s containers state and deletionTimestamp
133 lines
3.4 KiB
Go
133 lines
3.4 KiB
Go
/*
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Copyright 2016 The Fission 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 fission
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import (
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"fmt"
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"net"
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"net/http"
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"os"
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"os/signal"
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"runtime/debug"
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"strings"
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"syscall"
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"github.com/gorilla/handlers"
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"github.com/imdario/mergo"
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apiv1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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)
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func UrlForFunction(name, namespace string) string {
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prefix := "/fission-function"
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if namespace != metav1.NamespaceDefault {
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prefix = fmt.Sprintf("/fission-function/%s", namespace)
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}
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return fmt.Sprintf("%v/%v", prefix, name)
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}
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func SetupStackTraceHandler() {
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// register signal handler for dumping stack trace.
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c := make(chan os.Signal, 1)
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signal.Notify(c, syscall.SIGTERM)
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go func() {
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<-c
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fmt.Println("Received SIGTERM : Dumping stack trace")
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debug.PrintStack()
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os.Exit(1)
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}()
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}
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// IsNetworkError returns true if an error is a network error, and false otherwise.
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func IsNetworkError(err error) bool {
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_, ok := err.(net.Error)
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return ok
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}
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// GetFunctionIstioServiceName return service name of function for istio feature
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func GetFunctionIstioServiceName(fnName, fnNamespace string) string {
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return fmt.Sprintf("istio-%v-%v", fnName, fnNamespace)
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}
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func LoggingMiddleware(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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requestURI := r.RequestURI
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if !strings.Contains(requestURI, "healthz") {
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// Call the next handler, which can be another middleware in the chain, or the final handler.
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handlers.LoggingHandler(os.Stdout, next).ServeHTTP(w, r)
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}
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})
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}
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// MergeContainerSpecs merges container specs using a predefined order.
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//
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// The order of the arguments indicates which spec has precedence (lower index takes precedence over higher indexes).
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// Slices and maps are merged; other fields are set only if they are a zero value.
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func MergeContainerSpecs(specs ...*apiv1.Container) apiv1.Container {
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result := &apiv1.Container{}
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for _, spec := range specs {
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if spec == nil {
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continue
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}
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err := mergo.Merge(result, spec)
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if err != nil {
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panic(err)
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}
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}
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return *result
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}
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// IsNetworkDialError returns true if its a network dial error
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func IsNetworkDialError(err error) bool {
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netErr, ok := err.(net.Error)
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if !ok {
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return false
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}
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netOpErr, ok := netErr.(*net.OpError)
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if !ok {
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return false
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}
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if netOpErr.Op == "dial" {
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return true
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}
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return false
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}
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// IsReadyPod checks both all containers in a pod are ready and whether
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// the .metadata.DeletionTimestamp is nil.
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func IsReadyPod(pod *apiv1.Pod) bool {
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// since its a utility function, just ensuring there is no nil pointer exception
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if pod == nil {
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return false
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}
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// pod is in "Terminating" status if deletionTimestamp is not nil
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// https://github.com/kubernetes/kubernetes/issues/61376
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if pod.ObjectMeta.DeletionTimestamp != nil {
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return false
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}
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for _, cStatus := range pod.Status.ContainerStatuses {
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if !cStatus.Ready {
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return false
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}
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}
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return true
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}
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