336 lines
12 KiB
Go
336 lines
12 KiB
Go
/*
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Copyright 2014 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 e2e
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import (
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"fmt"
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"math"
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"net/http"
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"strings"
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"sync"
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"time"
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"k8s.io/apimachinery/pkg/api/errors"
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"k8s.io/apimachinery/pkg/util/net"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
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"k8s.io/kubernetes/pkg/util/intstr"
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"k8s.io/kubernetes/test/e2e/framework"
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testutils "k8s.io/kubernetes/test/utils"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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)
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const (
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// Try all the proxy tests this many times (to catch even rare flakes).
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proxyAttempts = 20
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// Only print this many characters of the response (to keep the logs
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// legible).
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maxDisplayBodyLen = 100
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// We have seen one of these calls take just over 15 seconds, so putting this at 30.
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proxyHTTPCallTimeout = 30 * time.Second
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)
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var _ = framework.KubeDescribe("Proxy", func() {
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version := api.Registry.GroupOrDie(v1.GroupName).GroupVersion.Version
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Context("version "+version, func() {
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options := framework.FrameworkOptions{
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ClientQPS: -1.0,
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}
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f := framework.NewFramework("proxy", options, nil)
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prefix := "/api/" + version
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// Port here has to be kept in sync with default kubelet port.
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It("should proxy logs on node with explicit kubelet port [Conformance]", func() { nodeProxyTest(f, prefix+"/proxy/nodes/", ":10250/logs/") })
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It("should proxy logs on node [Conformance]", func() { nodeProxyTest(f, prefix+"/proxy/nodes/", "/logs/") })
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It("should proxy to cadvisor", func() { nodeProxyTest(f, prefix+"/proxy/nodes/", ":4194/containers/") })
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It("should proxy logs on node with explicit kubelet port using proxy subresource [Conformance]", func() { nodeProxyTest(f, prefix+"/nodes/", ":10250/proxy/logs/") })
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It("should proxy logs on node using proxy subresource [Conformance]", func() { nodeProxyTest(f, prefix+"/nodes/", "/proxy/logs/") })
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It("should proxy to cadvisor using proxy subresource", func() { nodeProxyTest(f, prefix+"/nodes/", ":4194/proxy/containers/") })
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// using the porter image to serve content, access the content
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// (of multiple pods?) from multiple (endpoints/services?)
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It("should proxy through a service and a pod [Conformance]", func() {
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start := time.Now()
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labels := map[string]string{"proxy-service-target": "true"}
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service, err := f.ClientSet.Core().Services(f.Namespace.Name).Create(&v1.Service{
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ObjectMeta: v1.ObjectMeta{
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GenerateName: "proxy-service-",
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},
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Spec: v1.ServiceSpec{
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Selector: labels,
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Ports: []v1.ServicePort{
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{
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Name: "portname1",
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Port: 80,
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TargetPort: intstr.FromString("dest1"),
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},
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{
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Name: "portname2",
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Port: 81,
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TargetPort: intstr.FromInt(162),
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},
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{
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Name: "tlsportname1",
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Port: 443,
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TargetPort: intstr.FromString("tlsdest1"),
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},
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{
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Name: "tlsportname2",
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Port: 444,
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TargetPort: intstr.FromInt(462),
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},
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},
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},
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})
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Expect(err).NotTo(HaveOccurred())
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// Make an RC with a single pod. The 'porter' image is
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// a simple server which serves the values of the
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// environmental variables below.
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By("starting an echo server on multiple ports")
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pods := []*v1.Pod{}
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cfg := testutils.RCConfig{
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Client: f.ClientSet,
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InternalClient: f.InternalClientset,
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Image: "gcr.io/google_containers/porter:cd5cb5791ebaa8641955f0e8c2a9bed669b1eaab",
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Name: service.Name,
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Namespace: f.Namespace.Name,
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Replicas: 1,
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PollInterval: time.Second,
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Env: map[string]string{
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"SERVE_PORT_80": `<a href="/rewriteme">test</a>`,
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"SERVE_PORT_1080": `<a href="/rewriteme">test</a>`,
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"SERVE_PORT_160": "foo",
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"SERVE_PORT_162": "bar",
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"SERVE_TLS_PORT_443": `<a href="/tlsrewriteme">test</a>`,
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"SERVE_TLS_PORT_460": `tls baz`,
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"SERVE_TLS_PORT_462": `tls qux`,
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},
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Ports: map[string]int{
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"dest1": 160,
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"dest2": 162,
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"tlsdest1": 460,
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"tlsdest2": 462,
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},
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ReadinessProbe: &v1.Probe{
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Handler: v1.Handler{
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HTTPGet: &v1.HTTPGetAction{
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Port: intstr.FromInt(80),
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},
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},
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InitialDelaySeconds: 1,
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TimeoutSeconds: 5,
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PeriodSeconds: 10,
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},
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Labels: labels,
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CreatedPods: &pods,
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}
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Expect(framework.RunRC(cfg)).NotTo(HaveOccurred())
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defer framework.DeleteRCAndPods(f.ClientSet, f.InternalClientset, f.Namespace.Name, cfg.Name)
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Expect(f.WaitForAnEndpoint(service.Name)).NotTo(HaveOccurred())
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// table constructors
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// Try proxying through the service and directly to through the pod.
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svcProxyURL := func(scheme, port string) string {
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return prefix + "/proxy/namespaces/" + f.Namespace.Name + "/services/" + net.JoinSchemeNamePort(scheme, service.Name, port)
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}
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subresourceServiceProxyURL := func(scheme, port string) string {
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return prefix + "/namespaces/" + f.Namespace.Name + "/services/" + net.JoinSchemeNamePort(scheme, service.Name, port) + "/proxy"
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}
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podProxyURL := func(scheme, port string) string {
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return prefix + "/proxy/namespaces/" + f.Namespace.Name + "/pods/" + net.JoinSchemeNamePort(scheme, pods[0].Name, port)
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}
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subresourcePodProxyURL := func(scheme, port string) string {
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return prefix + "/namespaces/" + f.Namespace.Name + "/pods/" + net.JoinSchemeNamePort(scheme, pods[0].Name, port) + "/proxy"
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}
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// construct the table
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expectations := map[string]string{
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svcProxyURL("", "portname1") + "/": "foo",
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svcProxyURL("", "80") + "/": "foo",
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svcProxyURL("", "portname2") + "/": "bar",
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svcProxyURL("", "81") + "/": "bar",
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svcProxyURL("http", "portname1") + "/": "foo",
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svcProxyURL("http", "80") + "/": "foo",
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svcProxyURL("http", "portname2") + "/": "bar",
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svcProxyURL("http", "81") + "/": "bar",
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svcProxyURL("https", "tlsportname1") + "/": "tls baz",
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svcProxyURL("https", "443") + "/": "tls baz",
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svcProxyURL("https", "tlsportname2") + "/": "tls qux",
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svcProxyURL("https", "444") + "/": "tls qux",
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subresourceServiceProxyURL("", "portname1") + "/": "foo",
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subresourceServiceProxyURL("http", "portname1") + "/": "foo",
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subresourceServiceProxyURL("", "portname2") + "/": "bar",
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subresourceServiceProxyURL("http", "portname2") + "/": "bar",
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subresourceServiceProxyURL("https", "tlsportname1") + "/": "tls baz",
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subresourceServiceProxyURL("https", "tlsportname2") + "/": "tls qux",
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podProxyURL("", "1080") + "/": `<a href="` + podProxyURL("", "1080") + `/rewriteme">test</a>`,
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podProxyURL("", "160") + "/": "foo",
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podProxyURL("", "162") + "/": "bar",
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podProxyURL("http", "1080") + "/": `<a href="` + podProxyURL("http", "1080") + `/rewriteme">test</a>`,
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podProxyURL("http", "160") + "/": "foo",
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podProxyURL("http", "162") + "/": "bar",
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subresourcePodProxyURL("", "") + "/": `<a href="` + subresourcePodProxyURL("", "") + `/rewriteme">test</a>`,
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subresourcePodProxyURL("", "1080") + "/": `<a href="` + subresourcePodProxyURL("", "1080") + `/rewriteme">test</a>`,
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subresourcePodProxyURL("http", "1080") + "/": `<a href="` + subresourcePodProxyURL("http", "1080") + `/rewriteme">test</a>`,
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subresourcePodProxyURL("", "160") + "/": "foo",
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subresourcePodProxyURL("http", "160") + "/": "foo",
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subresourcePodProxyURL("", "162") + "/": "bar",
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subresourcePodProxyURL("http", "162") + "/": "bar",
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subresourcePodProxyURL("https", "443") + "/": `<a href="` + subresourcePodProxyURL("https", "443") + `/tlsrewriteme">test</a>`,
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subresourcePodProxyURL("https", "460") + "/": "tls baz",
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subresourcePodProxyURL("https", "462") + "/": "tls qux",
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// TODO: below entries don't work, but I believe we should make them work.
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// podPrefix + ":dest1": "foo",
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// podPrefix + ":dest2": "bar",
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}
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wg := sync.WaitGroup{}
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errs := []string{}
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errLock := sync.Mutex{}
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recordError := func(s string) {
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errLock.Lock()
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defer errLock.Unlock()
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errs = append(errs, s)
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}
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d := time.Since(start)
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framework.Logf("setup took %v, starting test cases", d)
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numberTestCases := len(expectations)
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totalAttempts := numberTestCases * proxyAttempts
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By(fmt.Sprintf("running %v cases, %v attempts per case, %v total attempts", numberTestCases, proxyAttempts, totalAttempts))
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for i := 0; i < proxyAttempts; i++ {
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wg.Add(numberTestCases)
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for path, val := range expectations {
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go func(i int, path, val string) {
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defer wg.Done()
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// this runs the test case
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body, status, d, err := doProxy(f, path, i)
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if err != nil {
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if serr, ok := err.(*errors.StatusError); ok {
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recordError(fmt.Sprintf("%v (%v; %v): path %v gave status error: %+v",
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i, status, d, path, serr.Status()))
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} else {
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recordError(fmt.Sprintf("%v: path %v gave error: %v", i, path, err))
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}
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return
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}
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if status != http.StatusOK {
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recordError(fmt.Sprintf("%v: path %v gave status: %v", i, path, status))
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}
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if e, a := val, string(body); e != a {
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recordError(fmt.Sprintf("%v: path %v: wanted %v, got %v", i, path, e, a))
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}
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if d > proxyHTTPCallTimeout {
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recordError(fmt.Sprintf("%v: path %v took %v > %v", i, path, d, proxyHTTPCallTimeout))
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}
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}(i, path, val)
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}
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wg.Wait()
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}
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if len(errs) != 0 {
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body, err := f.ClientSet.Core().Pods(f.Namespace.Name).GetLogs(pods[0].Name, &v1.PodLogOptions{}).Do().Raw()
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if err != nil {
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framework.Logf("Error getting logs for pod %s: %v", pods[0].Name, err)
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} else {
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framework.Logf("Pod %s has the following error logs: %s", pods[0].Name, body)
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}
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Fail(strings.Join(errs, "\n"))
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}
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})
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})
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})
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func doProxy(f *framework.Framework, path string, i int) (body []byte, statusCode int, d time.Duration, err error) {
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// About all of the proxy accesses in this file:
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// * AbsPath is used because it preserves the trailing '/'.
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// * Do().Raw() is used (instead of DoRaw()) because it will turn an
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// error from apiserver proxy into an actual error, and there is no
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// chance of the things we are talking to being confused for an error
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// that apiserver would have emitted.
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start := time.Now()
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body, err = f.ClientSet.Core().RESTClient().Get().AbsPath(path).Do().StatusCode(&statusCode).Raw()
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d = time.Since(start)
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if len(body) > 0 {
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framework.Logf("(%v) %v: %s (%v; %v)", i, path, truncate(body, maxDisplayBodyLen), statusCode, d)
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} else {
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framework.Logf("%v: %s (%v; %v)", path, "no body", statusCode, d)
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}
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return
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}
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func truncate(b []byte, maxLen int) []byte {
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if len(b) <= maxLen-3 {
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return b
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}
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b2 := append([]byte(nil), b[:maxLen-3]...)
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b2 = append(b2, '.', '.', '.')
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return b2
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}
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func pickNode(cs clientset.Interface) (string, error) {
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// TODO: investigate why it doesn't work on master Node.
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nodes := framework.GetReadySchedulableNodesOrDie(cs)
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if len(nodes.Items) == 0 {
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return "", fmt.Errorf("no nodes exist, can't test node proxy")
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}
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return nodes.Items[0].Name, nil
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}
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func nodeProxyTest(f *framework.Framework, prefix, nodeDest string) {
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node, err := pickNode(f.ClientSet)
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Expect(err).NotTo(HaveOccurred())
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// TODO: Change it to test whether all requests succeeded when requests
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// not reaching Kubelet issue is debugged.
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serviceUnavailableErrors := 0
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for i := 0; i < proxyAttempts; i++ {
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_, status, d, err := doProxy(f, prefix+node+nodeDest, i)
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if status == http.StatusServiceUnavailable {
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framework.Logf("Failed proxying node logs due to service unavailable: %v", err)
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time.Sleep(time.Second)
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serviceUnavailableErrors++
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} else {
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Expect(err).NotTo(HaveOccurred())
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Expect(status).To(Equal(http.StatusOK))
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Expect(d).To(BeNumerically("<", proxyHTTPCallTimeout))
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}
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}
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if serviceUnavailableErrors > 0 {
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framework.Logf("error: %d requests to proxy node logs failed", serviceUnavailableErrors)
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}
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maxFailures := int(math.Floor(0.1 * float64(proxyAttempts)))
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Expect(serviceUnavailableErrors).To(BeNumerically("<", maxFailures))
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}
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