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test: utils: borrow fixed GetKubeletConfig from k/k
We need this fix kubernetes/kubernetes#110875 to have reliable tests, but up until we can bump the k/k deps to 1.25+, we can't consume it. So borrow it from k/k repo for the time being. Signed-off-by: Francesco Romani <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| /* | ||
| 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 utils | ||
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| /* | ||
| * borrow | ||
| * https://raw.githubusercontent.com/kubernetes/kubernetes/v1.25.0-beta.0/test/e2e/framework/kubelet/config.go | ||
| * until we can bump the project dependencies to 1.25+ | ||
| */ | ||
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| import ( | ||
| "crypto/tls" | ||
| "encoding/json" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "regexp" | ||
| "strconv" | ||
| "time" | ||
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| "k8s.io/apimachinery/pkg/util/wait" | ||
| kubeletconfigv1beta1 "k8s.io/kubelet/config/v1beta1" | ||
| kubeletconfig "k8s.io/kubernetes/pkg/kubelet/apis/config" | ||
| kubeletconfigscheme "k8s.io/kubernetes/pkg/kubelet/apis/config/scheme" | ||
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| "k8s.io/kubernetes/test/e2e/framework" | ||
| e2ekubectl "k8s.io/kubernetes/test/e2e/framework/kubectl" | ||
| ) | ||
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| // GetCurrentKubeletConfig fetches the current Kubelet Config for the given node | ||
| func GetCurrentKubeletConfig(nodeName, namespace string, useProxy bool) (*kubeletconfig.KubeletConfiguration, error) { | ||
| resp := pollConfigz(5*time.Minute, 5*time.Second, nodeName, namespace, useProxy) | ||
| if len(resp) == 0 { | ||
| return nil, fmt.Errorf("failed to fetch /configz from %q", nodeName) | ||
| } | ||
| kubeCfg, err := decodeConfigz(resp) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return kubeCfg, nil | ||
| } | ||
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| // returns a status 200 response from the /configz endpoint or nil if fails | ||
| func pollConfigz(timeout time.Duration, pollInterval time.Duration, nodeName, namespace string, useProxy bool) []byte { | ||
| endpoint := "" | ||
| if useProxy { | ||
| // start local proxy, so we can send graceful deletion over query string, rather than body parameter | ||
| framework.Logf("Opening proxy to cluster") | ||
| tk := e2ekubectl.NewTestKubeconfig(framework.TestContext.CertDir, framework.TestContext.Host, framework.TestContext.KubeConfig, framework.TestContext.KubeContext, framework.TestContext.KubectlPath, namespace) | ||
| cmd := tk.KubectlCmd("proxy", "-p", "0") | ||
| stdout, stderr, err := framework.StartCmdAndStreamOutput(cmd) | ||
| framework.ExpectNoError(err) | ||
| defer stdout.Close() | ||
| defer stderr.Close() | ||
| defer framework.TryKill(cmd) | ||
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| buf := make([]byte, 128) | ||
| var n int | ||
| n, err = stdout.Read(buf) | ||
| framework.ExpectNoError(err) | ||
| output := string(buf[:n]) | ||
| proxyRegexp := regexp.MustCompile("Starting to serve on 127.0.0.1:([0-9]+)") | ||
| match := proxyRegexp.FindStringSubmatch(output) | ||
| framework.ExpectEqual(len(match), 2) | ||
| port, err := strconv.Atoi(match[1]) | ||
| framework.ExpectNoError(err) | ||
| framework.Logf("http requesting node kubelet /configz") | ||
| endpoint = fmt.Sprintf("http://127.0.0.1:%d/api/v1/nodes/%s/proxy/configz", port, nodeName) | ||
| } else { | ||
| endpoint = fmt.Sprintf("%s/api/v1/nodes/%s/proxy/configz", framework.TestContext.Host, framework.TestContext.NodeName) | ||
| } | ||
| tr := &http.Transport{ | ||
| TLSClientConfig: &tls.Config{InsecureSkipVerify: true}, | ||
| } | ||
| client := &http.Client{Transport: tr} | ||
| req, err := http.NewRequest("GET", endpoint, nil) | ||
| framework.ExpectNoError(err) | ||
| if !useProxy { | ||
| req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", framework.TestContext.BearerToken)) | ||
| } | ||
| req.Header.Add("Accept", "application/json") | ||
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| var respBody []byte | ||
| err = wait.PollImmediate(pollInterval, timeout, func() (bool, error) { | ||
| resp, err := client.Do(req) | ||
| if err != nil { | ||
| framework.Logf("Failed to get /configz, retrying. Error: %v", err) | ||
| return false, nil | ||
| } | ||
| defer resp.Body.Close() | ||
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| if resp.StatusCode != 200 { | ||
| framework.Logf("/configz response status not 200, retrying. Response was: %+v", resp) | ||
| return false, nil | ||
| } | ||
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| respBody, err = io.ReadAll(resp.Body) | ||
| if err != nil { | ||
| framework.Logf("failed to read body from /configz response, retrying. Error: %v", err) | ||
| return false, nil | ||
| } | ||
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| return true, nil | ||
| }) | ||
| framework.ExpectNoError(err, "Failed to get successful response from /configz") | ||
|
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| return respBody | ||
| } | ||
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| // Decodes the http response from /configz and returns a kubeletconfig.KubeletConfiguration (internal type). | ||
| func decodeConfigz(respBody []byte) (*kubeletconfig.KubeletConfiguration, error) { | ||
| // This hack because /configz reports the following structure: | ||
| // {"kubeletconfig": {the JSON representation of kubeletconfigv1beta1.KubeletConfiguration}} | ||
| type configzWrapper struct { | ||
| ComponentConfig kubeletconfigv1beta1.KubeletConfiguration `json:"kubeletconfig"` | ||
| } | ||
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| configz := configzWrapper{} | ||
| kubeCfg := kubeletconfig.KubeletConfiguration{} | ||
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| err := json.Unmarshal(respBody, &configz) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| scheme, _, err := kubeletconfigscheme.NewSchemeAndCodecs() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| err = scheme.Convert(&configz.ComponentConfig, &kubeCfg, nil) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| return &kubeCfg, nil | ||
| } |