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Merge pull request #1225 from adrianludwin/release-0.6
🐛 Ensure that webhook server is thread/start-safe
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Original file line number | Diff line number | Diff line change |
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/* | ||
Copyright 2019 The Kubernetes 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. | ||
*/ | ||
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package webhook_test | ||
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import ( | ||
"fmt" | ||
"io/ioutil" | ||
"net" | ||
"net/http" | ||
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. "github.com/onsi/ginkgo" | ||
. "github.com/onsi/gomega" | ||
"k8s.io/client-go/rest" | ||
"sigs.k8s.io/controller-runtime/pkg/envtest" | ||
"sigs.k8s.io/controller-runtime/pkg/webhook" | ||
) | ||
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var _ = Describe("Webhook Server", func() { | ||
var ( | ||
stop chan struct{} | ||
testHostPort string | ||
client *http.Client | ||
server *webhook.Server | ||
) | ||
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BeforeEach(func() { | ||
stop = make(chan struct{}) | ||
// closed in indivual tests differently | ||
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servingOpts := envtest.WebhookInstallOptions{} | ||
Expect(servingOpts.PrepWithoutInstalling()).To(Succeed()) | ||
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testHostPort = net.JoinHostPort(servingOpts.LocalServingHost, fmt.Sprintf("%d", servingOpts.LocalServingPort)) | ||
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// bypass needing to set up the x509 cert pool, etc ourselves | ||
clientTransport, err := rest.TransportFor(&rest.Config{ | ||
TLSClientConfig: rest.TLSClientConfig{CAData: servingOpts.LocalServingCAData}, | ||
}) | ||
Expect(err).NotTo(HaveOccurred()) | ||
client = &http.Client{ | ||
Transport: clientTransport, | ||
} | ||
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server = &webhook.Server{ | ||
Host: servingOpts.LocalServingHost, | ||
Port: servingOpts.LocalServingPort, | ||
CertDir: servingOpts.LocalServingCertDir, | ||
} | ||
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// TODO(directxman12): cleanup generated certificate dir, etc | ||
}) | ||
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startServer := func() (done <-chan struct{}) { | ||
doneCh := make(chan struct{}) | ||
go func() { | ||
defer GinkgoRecover() | ||
defer close(doneCh) | ||
Expect(server.Start(stop)).To(Succeed()) | ||
}() | ||
// wait till we can ping the server to start the test | ||
Eventually(func() error { | ||
_, err := client.Get(fmt.Sprintf("https://%s/unservedpath", testHostPort)) | ||
return err | ||
}).Should(Succeed()) | ||
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// this is normally called before Start by the manager | ||
Expect(server.InjectFunc(func(i interface{}) error { | ||
boolInj, canInj := i.(interface{ InjectBool(bool) error }) | ||
if !canInj { | ||
return nil | ||
} | ||
return boolInj.InjectBool(true) | ||
})).To(Succeed()) | ||
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return doneCh | ||
} | ||
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// TODO(directxman12): figure out a good way to test all the serving setup | ||
// with httptest.Server to get all the niceness from that. | ||
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Context("when serving", func() { | ||
PIt("should verify the client CA name when asked to", func() { | ||
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}) | ||
PIt("should support HTTP/2", func() { | ||
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}) | ||
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// TODO(directxman12): figure out a good way to test the port default, etc | ||
}) | ||
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It("should panic if a duplicate path is registered", func() { | ||
server.Register("/somepath", &testHandler{}) | ||
doneCh := startServer() | ||
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Expect(func() { server.Register("/somepath", &testHandler{}) }).To(Panic()) | ||
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close(stop) | ||
Eventually(doneCh, "4s").Should(BeClosed()) | ||
}) | ||
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Context("when registering new webhooks before starting", func() { | ||
It("should serve a webhook on the requested path", func() { | ||
server.Register("/somepath", &testHandler{}) | ||
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doneCh := startServer() | ||
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Eventually(func() ([]byte, error) { | ||
resp, err := client.Get(fmt.Sprintf("https://%s/somepath", testHostPort)) | ||
Expect(err).NotTo(HaveOccurred()) | ||
defer resp.Body.Close() | ||
return ioutil.ReadAll(resp.Body) | ||
}).Should(Equal([]byte("gadzooks!"))) | ||
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close(stop) | ||
Eventually(doneCh, "4s").Should(BeClosed()) | ||
}) | ||
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It("should inject dependencies eventually, given an inject func is eventually provided", func() { | ||
handler := &testHandler{} | ||
server.Register("/somepath", handler) | ||
doneCh := startServer() | ||
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Eventually(func() bool { return handler.injectedField }).Should(BeTrue()) | ||
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close(stop) | ||
Eventually(doneCh, "4s").Should(BeClosed()) | ||
}) | ||
}) | ||
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Context("when registering webhooks after starting", func() { | ||
var ( | ||
doneCh <-chan struct{} | ||
) | ||
BeforeEach(func() { | ||
doneCh = startServer() | ||
}) | ||
AfterEach(func() { | ||
// wait for cleanup to happen | ||
close(stop) | ||
Eventually(doneCh, "4s").Should(BeClosed()) | ||
}) | ||
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It("should serve a webhook on the requested path", func() { | ||
server.Register("/somepath", &testHandler{}) | ||
resp, err := client.Get(fmt.Sprintf("https://%s/somepath", testHostPort)) | ||
Expect(err).NotTo(HaveOccurred()) | ||
defer resp.Body.Close() | ||
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Expect(ioutil.ReadAll(resp.Body)).To(Equal([]byte("gadzooks!"))) | ||
}) | ||
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It("should inject dependencies, if an inject func has been provided already", func() { | ||
handler := &testHandler{} | ||
server.Register("/somepath", handler) | ||
Expect(handler.injectedField).To(BeTrue()) | ||
}) | ||
}) | ||
}) | ||
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type testHandler struct { | ||
injectedField bool | ||
} | ||
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func (t *testHandler) InjectBool(val bool) error { | ||
t.injectedField = val | ||
return nil | ||
} | ||
func (t *testHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) { | ||
if _, err := resp.Write([]byte("gadzooks!")); err != nil { | ||
panic("unable to write http response!") | ||
} | ||
} |
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