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helm/pkg/kube/client_test.go

506 lines
12 KiB

/*
Copyright The Helm Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package kube
import (
"bytes"
"io"
"io/ioutil"
"net/http"
"strings"
"testing"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/cli-runtime/pkg/resource"
"k8s.io/client-go/kubernetes/scheme"
"k8s.io/client-go/rest/fake"
cmdtesting "k8s.io/kubernetes/pkg/kubectl/cmd/testing"
)
var unstructuredSerializer = resource.UnstructuredPlusDefaultContentConfig().NegotiatedSerializer
var codec = scheme.Codecs.LegacyCodec(scheme.Scheme.PrioritizedVersionsAllGroups()...)
func objBody(obj runtime.Object) io.ReadCloser {
return ioutil.NopCloser(bytes.NewReader([]byte(runtime.EncodeOrDie(codec, obj))))
}
func newPod(name string) v1.Pod {
return newPodWithStatus(name, v1.PodStatus{}, "")
}
func newPodWithStatus(name string, status v1.PodStatus, namespace string) v1.Pod {
ns := v1.NamespaceDefault
if namespace != "" {
ns = namespace
}
return v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: name,
Namespace: ns,
SelfLink: "/api/v1/namespaces/default/pods/" + name,
},
Spec: v1.PodSpec{
Containers: []v1.Container{{
Name: "app:v4",
Image: "abc/app:v4",
Ports: []v1.ContainerPort{{Name: "http", ContainerPort: 80}},
}},
},
Status: status,
}
}
func newPodList(names ...string) v1.PodList {
var list v1.PodList
for _, name := range names {
list.Items = append(list.Items, newPod(name))
}
return list
}
func notFoundBody() *metav1.Status {
return &metav1.Status{
Code: http.StatusNotFound,
Status: metav1.StatusFailure,
Reason: metav1.StatusReasonNotFound,
Message: " \"\" not found",
Details: &metav1.StatusDetails{},
}
}
func newResponse(code int, obj runtime.Object) (*http.Response, error) {
header := http.Header{}
header.Set("Content-Type", runtime.ContentTypeJSON)
body := ioutil.NopCloser(bytes.NewReader([]byte(runtime.EncodeOrDie(codec, obj))))
return &http.Response{StatusCode: code, Header: header, Body: body}, nil
}
func newTestClient() *Client {
return &Client{
Factory: cmdtesting.NewTestFactory().WithNamespace("default"),
Log: nopLogger,
}
}
func TestUpdate(t *testing.T) {
listA := newPodList("starfish", "otter", "squid")
listB := newPodList("starfish", "otter", "dolphin")
listC := newPodList("starfish", "otter", "dolphin")
listB.Items[0].Spec.Containers[0].Ports = []v1.ContainerPort{{Name: "https", ContainerPort: 443}}
listC.Items[0].Spec.Containers[0].Ports = []v1.ContainerPort{{Name: "https", ContainerPort: 443}}
var actions []string
c := newTestClient()
c.Factory.(*cmdtesting.TestFactory).UnstructuredClient = &fake.RESTClient{
NegotiatedSerializer: unstructuredSerializer,
Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
p, m := req.URL.Path, req.Method
actions = append(actions, p+":"+m)
t.Logf("got request %s %s", p, m)
switch {
case p == "/namespaces/default/pods/starfish" && m == "GET":
return newResponse(200, &listA.Items[0])
case p == "/namespaces/default/pods/otter" && m == "GET":
return newResponse(200, &listA.Items[1])
case p == "/namespaces/default/pods/otter" && m == "PATCH":
data, err := ioutil.ReadAll(req.Body)
if err != nil {
t.Fatalf("could not dump request: %s", err)
}
req.Body.Close()
expected := `{}`
if string(data) != expected {
t.Errorf("expected patch\n%s\ngot\n%s", expected, string(data))
}
return newResponse(200, &listB.Items[0])
case p == "/namespaces/default/pods/dolphin" && m == "GET":
return newResponse(404, notFoundBody())
case p == "/namespaces/default/pods/starfish" && m == "PATCH":
data, err := ioutil.ReadAll(req.Body)
if err != nil {
t.Fatalf("could not dump request: %s", err)
}
req.Body.Close()
expected := `{"spec":{"$setElementOrder/containers":[{"name":"app:v4"}],"containers":[{"$setElementOrder/ports":[{"containerPort":443}],"name":"app:v4","ports":[{"containerPort":443,"name":"https"},{"$patch":"delete","containerPort":80}]}]}}`
if string(data) != expected {
t.Errorf("expected patch\n%s\ngot\n%s", expected, string(data))
}
return newResponse(200, &listB.Items[0])
case p == "/namespaces/default/pods" && m == "POST":
return newResponse(200, &listB.Items[1])
case p == "/namespaces/default/pods/squid" && m == "DELETE":
return newResponse(200, &listB.Items[1])
default:
t.Fatalf("unexpected request: %s %s", req.Method, req.URL.Path)
return nil, nil
}
}),
}
first, err := c.Build(objBody(&listA))
if err != nil {
t.Fatal(err)
}
second, err := c.Build(objBody(&listB))
if err != nil {
t.Fatal(err)
}
if _, err := c.Update(first, second, false); err != nil {
t.Fatal(err)
}
// TODO: Find a way to test methods that use Client Set
// Test with a wait
// if err := c.Update("test", objBody(codec, &listB), objBody(codec, &listC), false, 300, true); err != nil {
// t.Fatal(err)
// }
// Test with a wait should fail
// TODO: A way to make this not based off of an extremely short timeout?
// if err := c.Update("test", objBody(codec, &listC), objBody(codec, &listA), false, 2, true); err != nil {
// t.Fatal(err)
// }
expectedActions := []string{
"/namespaces/default/pods/starfish:GET",
"/namespaces/default/pods/starfish:GET",
"/namespaces/default/pods/starfish:PATCH",
"/namespaces/default/pods/otter:GET",
"/namespaces/default/pods/otter:GET",
"/namespaces/default/pods/otter:PATCH",
"/namespaces/default/pods/dolphin:GET",
"/namespaces/default/pods:POST",
"/namespaces/default/pods/squid:DELETE",
}
if len(expectedActions) != len(actions) {
t.Errorf("unexpected number of requests, expected %d, got %d", len(expectedActions), len(actions))
return
}
for k, v := range expectedActions {
if actions[k] != v {
t.Errorf("expected %s request got %s", v, actions[k])
}
}
}
func TestBuild(t *testing.T) {
tests := []struct {
name string
namespace string
reader io.Reader
count int
err bool
}{
{
name: "Valid input",
namespace: "test",
reader: strings.NewReader(guestbookManifest),
count: 6,
}, {
name: "Valid input, deploying resources into different namespaces",
namespace: "test",
reader: strings.NewReader(namespacedGuestbookManifest),
count: 1,
},
}
c := newTestClient()
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// Test for an invalid manifest
infos, err := c.Build(tt.reader)
if err != nil && !tt.err {
t.Errorf("Got error message when no error should have occurred: %v", err)
} else if err != nil && strings.Contains(err.Error(), "--validate=false") {
t.Error("error message was not scrubbed")
}
if len(infos) != tt.count {
t.Errorf("expected %d result objects, got %d", tt.count, len(infos))
}
})
}
}
func TestPerform(t *testing.T) {
tests := []struct {
name string
reader io.Reader
count int
err bool
errMessage string
}{
{
name: "Valid input",
reader: strings.NewReader(guestbookManifest),
count: 6,
}, {
name: "Empty manifests",
reader: strings.NewReader(""),
err: true,
errMessage: "no objects visited",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
results := []*resource.Info{}
fn := func(info *resource.Info) error {
results = append(results, info)
return nil
}
c := newTestClient()
infos, err := c.Build(tt.reader)
if err != nil && err.Error() != tt.errMessage {
t.Errorf("Error while building manifests: %v", err)
}
err = perform(infos, fn)
if (err != nil) != tt.err {
t.Errorf("expected error: %v, got %v", tt.err, err)
}
if err != nil && err.Error() != tt.errMessage {
t.Errorf("expected error message: %v, got %v", tt.errMessage, err)
}
if len(results) != tt.count {
t.Errorf("expected %d result objects, got %d", tt.count, len(results))
}
})
}
}
func TestReal(t *testing.T) {
t.Skip("This is a live test, comment this line to run")
c := New(nil)
resources, err := c.Build(strings.NewReader(guestbookManifest))
if err != nil {
t.Fatal(err)
}
if _, err := c.Create(resources); err != nil {
t.Fatal(err)
}
testSvcEndpointManifest := testServiceManifest + "\n---\n" + testEndpointManifest
c = New(nil)
resources, err = c.Build(strings.NewReader(testSvcEndpointManifest))
if err != nil {
t.Fatal(err)
}
if _, err := c.Create(resources); err != nil {
t.Fatal(err)
}
resources, err = c.Build(strings.NewReader(testEndpointManifest))
if err != nil {
t.Fatal(err)
}
if _, errs := c.Delete(resources); errs != nil {
t.Fatal(errs)
}
resources, err = c.Build(strings.NewReader(testSvcEndpointManifest))
if err != nil {
t.Fatal(err)
}
// ensures that delete does not fail if a resource is not found
if _, errs := c.Delete(resources); errs != nil {
t.Fatal(errs)
}
}
const testServiceManifest = `
kind: Service
apiVersion: v1
metadata:
name: my-service
spec:
selector:
app: myapp
ports:
- port: 80
protocol: TCP
targetPort: 9376
`
const testEndpointManifest = `
kind: Endpoints
apiVersion: v1
metadata:
name: my-service
subsets:
- addresses:
- ip: "1.2.3.4"
ports:
- port: 9376
`
const guestbookManifest = `
apiVersion: v1
kind: Service
metadata:
name: redis-master
labels:
app: redis
tier: backend
role: master
spec:
ports:
- port: 6379
targetPort: 6379
selector:
app: redis
tier: backend
role: master
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: redis-master
spec:
replicas: 1
template:
metadata:
labels:
app: redis
role: master
tier: backend
spec:
containers:
- name: master
image: k8s.gcr.io/redis:e2e # or just image: redis
resources:
requests:
cpu: 100m
memory: 100Mi
ports:
- containerPort: 6379
---
apiVersion: v1
kind: Service
metadata:
name: redis-slave
labels:
app: redis
tier: backend
role: slave
spec:
ports:
# the port that this service should serve on
- port: 6379
selector:
app: redis
tier: backend
role: slave
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: redis-slave
spec:
replicas: 2
template:
metadata:
labels:
app: redis
role: slave
tier: backend
spec:
containers:
- name: slave
image: gcr.io/google_samples/gb-redisslave:v1
resources:
requests:
cpu: 100m
memory: 100Mi
env:
- name: GET_HOSTS_FROM
value: dns
ports:
- containerPort: 6379
---
apiVersion: v1
kind: Service
metadata:
name: frontend
labels:
app: guestbook
tier: frontend
spec:
ports:
- port: 80
selector:
app: guestbook
tier: frontend
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: frontend
spec:
replicas: 3
template:
metadata:
labels:
app: guestbook
tier: frontend
spec:
containers:
- name: php-redis
image: gcr.io/google-samples/gb-frontend:v4
resources:
requests:
cpu: 100m
memory: 100Mi
env:
- name: GET_HOSTS_FROM
value: dns
ports:
- containerPort: 80
`
const namespacedGuestbookManifest = `
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: frontend
namespace: guestbook
spec:
replicas: 3
template:
metadata:
labels:
app: guestbook
tier: frontend
spec:
containers:
- name: php-redis
image: gcr.io/google-samples/gb-frontend:v4
resources:
requests:
cpu: 100m
memory: 100Mi
env:
- name: GET_HOSTS_FROM
value: dns
ports:
- containerPort: 80
`