mirror of
https://github.com/k3s-io/kubernetes.git
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113 lines
3.4 KiB
Go
113 lines
3.4 KiB
Go
/*
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Copyright 2018 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 polymorphichelpers
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import (
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"errors"
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"fmt"
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"os"
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"sort"
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"time"
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"k8s.io/api/core/v1"
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corev1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/cli-runtime/pkg/genericclioptions"
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corev1client "k8s.io/client-go/kubernetes/typed/core/v1"
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"k8s.io/client-go/rest"
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"k8s.io/kubernetes/pkg/kubectl/util/podutils"
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)
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func logsForObject(restClientGetter genericclioptions.RESTClientGetter, object, options runtime.Object, timeout time.Duration, allContainers bool) ([]rest.ResponseWrapper, error) {
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clientConfig, err := restClientGetter.ToRESTConfig()
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if err != nil {
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return nil, err
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}
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clientset, err := corev1client.NewForConfig(clientConfig)
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if err != nil {
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return nil, err
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}
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return logsForObjectWithClient(clientset, object, options, timeout, allContainers)
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}
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// TODO: remove internal clientset once all callers use external versions
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// this is split for easy test-ability
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func logsForObjectWithClient(clientset corev1client.CoreV1Interface, object, options runtime.Object, timeout time.Duration, allContainers bool) ([]rest.ResponseWrapper, error) {
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opts, ok := options.(*corev1.PodLogOptions)
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if !ok {
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return nil, errors.New("provided options object is not a PodLogOptions")
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}
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switch t := object.(type) {
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case *corev1.PodList:
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ret := []rest.ResponseWrapper{}
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for i := range t.Items {
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currRet, err := logsForObjectWithClient(clientset, &t.Items[i], options, timeout, allContainers)
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if err != nil {
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return nil, err
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}
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ret = append(ret, currRet...)
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}
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return ret, nil
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case *corev1.Pod:
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// if allContainers is true, then we're going to locate all containers and then iterate through them. At that point, "allContainers" is false
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if !allContainers {
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return []rest.ResponseWrapper{clientset.Pods(t.Namespace).GetLogs(t.Name, opts)}, nil
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}
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ret := []rest.ResponseWrapper{}
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for _, c := range t.Spec.InitContainers {
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currOpts := opts.DeepCopy()
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currOpts.Container = c.Name
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currRet, err := logsForObjectWithClient(clientset, t, currOpts, timeout, false)
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if err != nil {
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return nil, err
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}
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ret = append(ret, currRet...)
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}
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for _, c := range t.Spec.Containers {
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currOpts := opts.DeepCopy()
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currOpts.Container = c.Name
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currRet, err := logsForObjectWithClient(clientset, t, currOpts, timeout, false)
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if err != nil {
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return nil, err
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}
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ret = append(ret, currRet...)
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}
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return ret, nil
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}
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namespace, selector, err := SelectorsForObject(object)
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if err != nil {
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return nil, fmt.Errorf("cannot get the logs from %T: %v", object, err)
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}
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sortBy := func(pods []*v1.Pod) sort.Interface { return podutils.ByLogging(pods) }
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pod, numPods, err := GetFirstPod(clientset, namespace, selector.String(), timeout, sortBy)
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if err != nil {
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return nil, err
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}
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if numPods > 1 {
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fmt.Fprintf(os.Stderr, "Found %v pods, using pod/%v\n", numPods, pod.Name)
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}
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return logsForObjectWithClient(clientset, pod, options, timeout, allContainers)
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}
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