概要
node、pod のリソース(CPU、Memory)の消費量を確認するため、kubectl top を実行しようとしましたが、インストールが必要とのこと。
helmでインストールします。
事前調査
最新バージョンを確認します。
$ helm search repo bitnami | grep metrics-server bitnami/metrics-server 7.2.8 0.7.1 Metrics Server aggregates resource usage data, ...
values.yaml を取得します。
$ helm show values bitnami/metrics-server --version 7.2.8 > values.7.2.8.yaml
namespace は分け、metrics-server にしたいと思い、ググったところ下記のページがヒットしました。
403 Forbidden
You are not allowed to access this.
www.linode.com
下記のように記載されていました。
helm upgrade --install metrics-server bitnami/metrics-server \ --create-namespace --namespace metrics-server \ --set apiService.create=true \ --set extraArgs.kubelet-insecure-tls=true \ --set extraArgs.kubelet-preferred-address-types=InternalIP
ただ、values.yamlをチェックすると、apiService.create については下記の記載がありました。
apiService: ## @param apiService.create Specifies whether the v1beta1.metrics.k8s.io API service should be created. You can check if it is needed with `kubectl get --raw "/apis/metrics.k8s.io/v1beta1/nodes"`. ## This is still necessary up to at least k8s version >= 1.21, but depends on vendors and cloud providers. ## create: false
実行してもErrorが返ってきます。
$ kubectl get --raw "/apis/metrics.k8s.io/v1beta1/nodes"
Error from server (ServiceUnavailable): the server is currently unable to handle the request
下記もよくわかりません。
## @param extraArgs Extra arguments to pass to metrics-server on start up ## ref: https://github.com/kubernetes-incubator/metrics-server#flags ## ## extraArgs: ## - --kubelet-insecure-tls=true ## - --kubelet-preferred-address-types=InternalIP
まずは、namespaceOverride のみ指定することにしました。
1回目(helm install)
helm install
とりあえず下記でインストールしてみました。
helm install metrics-server bitnami/metrics-server --version 7.2.8 --namespace metrics-server --create-namespace --set namespaceOverride=metrics-server
ERROR
ERRORとなってしまいました。
$ helm install metrics-server bitnami/metrics-server --version 7.2.8 --namespace metrics-server --create-namespace --set namespaceOverride=metrics-server NAME: metrics-server LAST DEPLOYED: Sun Jul 21 22:35:32 2024 NAMESPACE: metrics-server STATUS: deployed REVISION: 1 TEST SUITE: None NOTES: CHART NAME: metrics-server CHART VERSION: 7.2.8 APP VERSION: 0.7.1 \** Please be patient while the chart is being deployed ** The metric server has been deployed. ################################################################################### ### ERROR: The metrics.k8s.io/v1beta1 API service is not enabled in the cluster ### ################################################################################### You have disabled the API service creation for this release. As the Kubernetes version in the cluster does not have metrics.k8s.io/v1beta1, the metrics API will not work with this release unless: Option A: You complete your metrics-server release by running: helm upgrade --namespace metrics-server metrics-server oci://registry-1.docker.io/bitnamicharts/metrics-server \ --set apiService.create=true Option B: You configure the metrics API service outside of this Helm chart WARNING: There are "resources" sections in the chart not set. Using "resourcesPreset" is not recommended for production. For production installations, please set the following values according to your workload needs: - resources +info https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/
2回目(helm upgrade)
helm upgrade
Option A を実行してみます。
helm upgrade --namespace metrics-server metrics-server oci://registry-1.docker.io/bitnamicharts/metrics-server --set apiService.create=true
結果
下記のような結果になりました。
Pulled: registry-1.docker.io/bitnamicharts/metrics-server:7.2.8 Digest: sha256:b073d345be3bfe9d55bafd194338f3aa95f9f136cc999d3e2ea5cb71136a6ad6 Release "metrics-server" has been upgraded. Happy Helming! NAME: metrics-server LAST DEPLOYED: Sun Jul 21 22:38:19 2024 NAMESPACE: metrics-server STATUS: deployed REVISION: 2 TEST SUITE: None NOTES: CHART NAME: metrics-server CHART VERSION: 7.2.8 APP VERSION: 0.7.1 \** Please be patient while the chart is being deployed ** The metric server has been deployed. In a few minutes you should be able to list metrics using the following command: kubectl get --raw "/apis/metrics.k8s.io/v1beta1/nodes" WARNING: There are "resources" sections in the chart not set. Using "resourcesPreset" is not recommended for production. For production installations, please set the following values according to your workload needs: - resources +info https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/
podがREADYにならず
しかし、いつになっても下記のapiが有効にならず、pod がREADYになりません。
$ kubectl get --raw "/apis/metrics.k8s.io/v1beta1/nodes"
Error from server (ServiceUnavailable): the server is currently unable to handle the request
$ k get pod NAME READY STATUS RESTARTS AGE metrics-server-56fcf7dc77-x2qpn 0/1 Running 0 5m33s
log確認
logを見てみます。
ノード間の通信ができていない模様。
$ kubectl logs metrics-server-56fcf7dc77-x2qpn --namespace=metrics-server I0721 13:35:48.585951 1 serving.go:374] Generated self-signed cert (apiserver.local.config/certificates/apiserver.crt, apiserver.local.config/certificates/apiserver.key) I0721 13:35:59.373537 1 handler.go:275] Adding GroupVersion metrics.k8s.io v1beta1 to ResourceManager E0721 13:35:59.776228 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker1:10250/metrics/resource\": dial tcp: lookup k8s-worker1 on 10.96.0.10:53: no such host" node="k8s-worker1" E0721 13:35:59.871436 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker3:10250/metrics/resource\": dial tcp: lookup k8s-worker3 on 10.96.0.10:53: no such host" node="k8s-worker3" E0721 13:35:59.871470 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl2:10250/metrics/resource\": dial tcp: lookup k8s-ctrl2 on 10.96.0.10:53: no such host" node="k8s-ctrl2" E0721 13:35:59.875311 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl3:10250/metrics/resource\": dial tcp: lookup k8s-ctrl3 on 10.96.0.10:53: no such host" node="k8s-ctrl3" E0721 13:35:59.875728 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker2:10250/metrics/resource\": dial tcp: lookup k8s-worker2 on 10.96.0.10:53: no such host" node="k8s-worker2" E0721 13:35:59.877540 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl1:10250/metrics/resource\": dial tcp: lookup k8s-ctrl1 on 10.96.0.10:53: no such host" node="k8s-ctrl1" I0721 13:35:59.986446 1 requestheader_controller.go:169] Starting RequestHeaderAuthRequestController I0721 13:35:59.986519 1 shared_informer.go:311] Waiting for caches to sync for RequestHeaderAuthRequestController I0721 13:35:59.986549 1 configmap_cafile_content.go:202] "Starting controller" name="client-ca::kube-system::extension-apiserver-authentication::client-ca-file" I0721 13:35:59.986571 1 configmap_cafile_content.go:202] "Starting controller" name="client-ca::kube-system::extension-apiserver-authentication::requestheader-client-ca-file" I0721 13:35:59.986602 1 shared_informer.go:311] Waiting for caches to sync for client-ca::kube-system::extension-apiserver-authentication::client-ca-file I0721 13:35:59.986626 1 shared_informer.go:311] Waiting for caches to sync for client-ca::kube-system::extension-apiserver-authentication::requestheader-client-ca-file I0721 13:35:59.990317 1 secure_serving.go:213] Serving securely on [::]:8443 I0721 13:35:59.990444 1 dynamic_serving_content.go:132] "Starting controller" name="serving-cert::apiserver.local.config/certificates/apiserver.crt::apiserver.local.config/certificates/apiserver.key" I0721 13:35:59.990827 1 tlsconfig.go:240] "Starting DynamicServingCertificateController" I0721 13:36:00.087076 1 shared_informer.go:318] Caches are synced for RequestHeaderAuthRequestController I0721 13:36:00.087406 1 shared_informer.go:318] Caches are synced for client-ca::kube-system::extension-apiserver-authentication::requestheader-client-ca-file I0721 13:36:00.090150 1 shared_informer.go:318] Caches are synced for client-ca::kube-system::extension-apiserver-authentication::client-ca-file I0721 13:36:04.172238 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:36:14.087916 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:36:24.172206 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:36:34.272485 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:36:44.084814 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:36:54.087545 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:36:57.519842 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" E0721 13:36:59.600462 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl3:10250/metrics/resource\": dial tcp: lookup k8s-ctrl3 on 10.96.0.10:53: no such host" node="k8s-ctrl3" E0721 13:36:59.671402 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker1:10250/metrics/resource\": dial tcp: lookup k8s-worker1 on 10.96.0.10:53: no such host" node="k8s-worker1" E0721 13:36:59.675075 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker3:10250/metrics/resource\": dial tcp: lookup k8s-worker3 on 10.96.0.10:53: no such host" node="k8s-worker3" E0721 13:36:59.774566 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl2:10250/metrics/resource\": dial tcp: lookup k8s-ctrl2 on 10.96.0.10:53: no such host" node="k8s-ctrl2" E0721 13:36:59.775402 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker2:10250/metrics/resource\": dial tcp: lookup k8s-worker2 on 10.96.0.10:53: no such host" node="k8s-worker2" E0721 13:36:59.776404 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl1:10250/metrics/resource\": dial tcp: lookup k8s-ctrl1 on 10.96.0.10:53: no such host" node="k8s-ctrl1" I0721 13:37:04.174950 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:37:14.087252 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:37:24.090033 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:37:34.271902 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:37:44.088338 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:37:54.087566 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" E0721 13:37:59.593493 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl3:10250/metrics/resource\": dial tcp: lookup k8s-ctrl3 on 10.96.0.10:53: no such host" node="k8s-ctrl3" E0721 13:37:59.594046 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl1:10250/metrics/resource\": dial tcp: lookup k8s-ctrl1 on 10.96.0.10:53: no such host" node="k8s-ctrl1" E0721 13:37:59.676860 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker3:10250/metrics/resource\": dial tcp: lookup k8s-worker3 on 10.96.0.10:53: no such host" node="k8s-worker3" E0721 13:37:59.771319 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker1:10250/metrics/resource\": dial tcp: lookup k8s-worker1 on 10.96.0.10:53: no such host" node="k8s-worker1" E0721 13:37:59.773973 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl2:10250/metrics/resource\": dial tcp: lookup k8s-ctrl2 on 10.96.0.10:53: no such host" node="k8s-ctrl2" E0721 13:37:59.776458 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker2:10250/metrics/resource\": dial tcp: lookup k8s-worker2 on 10.96.0.10:53: no such host" node="k8s-worker2" I0721 13:38:04.089431 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:38:10.520999 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:38:14.172022 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:38:24.086920 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:38:34.085004 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:38:44.086110 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:38:54.085712 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" E0721 13:38:59.601377 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl1:10250/metrics/resource\": dial tcp: lookup k8s-ctrl1 on 10.96.0.10:53: no such host" node="k8s-ctrl1" E0721 13:38:59.601810 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker1:10250/metrics/resource\": dial tcp: lookup k8s-worker1 on 10.96.0.10:53: no such host" node="k8s-worker1" E0721 13:38:59.675161 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl2:10250/metrics/resource\": dial tcp: lookup k8s-ctrl2 on 10.96.0.10:53: no such host" node="k8s-ctrl2" E0721 13:38:59.775026 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker3:10250/metrics/resource\": dial tcp: lookup k8s-worker3 on 10.96.0.10:53: no such host" node="k8s-worker3" E0721 13:38:59.775352 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl3:10250/metrics/resource\": dial tcp: lookup k8s-ctrl3 on 10.96.0.10:53: no such host" node="k8s-ctrl3" E0721 13:38:59.775636 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker2:10250/metrics/resource\": dial tcp: lookup k8s-worker2 on 10.96.0.10:53: no such host" node="k8s-worker2" I0721 13:39:04.172176 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:39:14.090188 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:39:19.519952 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:39:24.085394 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:39:34.087621 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:39:44.085905 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:39:54.089128 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" E0721 13:39:59.591158 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker2:10250/metrics/resource\": dial tcp: lookup k8s-worker2 on 10.96.0.10:53: no such host" node="k8s-worker2" E0721 13:39:59.599024 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl3:10250/metrics/resource\": dial tcp: lookup k8s-ctrl3 on 10.96.0.10:53: no such host" node="k8s-ctrl3" E0721 13:39:59.676404 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker1:10250/metrics/resource\": dial tcp: lookup k8s-worker1 on 10.96.0.10:53: no such host" node="k8s-worker1" E0721 13:39:59.775303 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl2:10250/metrics/resource\": dial tcp: lookup k8s-ctrl2 on 10.96.0.10:53: no such host" node="k8s-ctrl2" E0721 13:39:59.775925 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker3:10250/metrics/resource\": dial tcp: lookup k8s-worker3 on 10.96.0.10:53: no such host" node="k8s-worker3" E0721 13:39:59.776091 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl1:10250/metrics/resource\": dial tcp: lookup k8s-ctrl1 on 10.96.0.10:53: no such host" node="k8s-ctrl1" I0721 13:40:04.089972 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:40:14.087070 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:40:24.090763 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:40:31.520141 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:40:34.172195 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:40:44.175687 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:40:54.085295 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" E0721 13:40:59.594309 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker1:10250/metrics/resource\": dial tcp: lookup k8s-worker1 on 10.96.0.10:53: no such host" node="k8s-worker1" E0721 13:40:59.671240 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker3:10250/metrics/resource\": dial tcp: lookup k8s-worker3 on 10.96.0.10:53: no such host" node="k8s-worker3" E0721 13:40:59.671271 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker2:10250/metrics/resource\": dial tcp: lookup k8s-worker2 on 10.96.0.10:53: no such host" node="k8s-worker2" E0721 13:40:59.774753 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl1:10250/metrics/resource\": dial tcp: lookup k8s-ctrl1 on 10.96.0.10:53: no such host" node="k8s-ctrl1" E0721 13:40:59.775725 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl2:10250/metrics/resource\": dial tcp: lookup k8s-ctrl2 on 10.96.0.10:53: no such host" node="k8s-ctrl2" E0721 13:40:59.776116 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl3:10250/metrics/resource\": dial tcp: lookup k8s-ctrl3 on 10.96.0.10:53: no such host" node="k8s-ctrl3" I0721 13:41:04.087360 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:41:14.178879 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:41:24.086055 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:41:34.174599 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:41:43.518528 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:41:44.172084 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:41:54.087816 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" E0721 13:41:59.593739 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl1:10250/metrics/resource\": dial tcp: lookup k8s-ctrl1 on 10.96.0.10:53: no such host" node="k8s-ctrl1" E0721 13:41:59.595605 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker1:10250/metrics/resource\": dial tcp: lookup k8s-worker1 on 10.96.0.10:53: no such host" node="k8s-worker1" E0721 13:41:59.671272 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl2:10250/metrics/resource\": dial tcp: lookup k8s-ctrl2 on 10.96.0.10:53: no such host" node="k8s-ctrl2" E0721 13:41:59.771447 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl3:10250/metrics/resource\": dial E0721 13:41:59.774120 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker3:10250/metrics/resource\": diaE0721 13:41:59.774946 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker2:10250/metrics/resource\": diaI0721 13:42:04.087704 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:42:14.177970 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:42:24.089793 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:42:34.176912 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:42:44.177401 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:42:53.520447 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:42:54.174215 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" E0721 13:42:59.590989 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl3:10250/metrics/resource\": dial E0721 13:42:59.604431 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl2:10250/metrics/resource\": dial E0721 13:42:59.611141 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker3:10250/metrics/resource\": diaE0721 13:42:59.611431 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker2:10250/metrics/resource\": diaE0721 13:42:59.612691 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-ctrl1:10250/metrics/resource\": dial E0721 13:42:59.617809 1 scraper.go:149] "Failed to scrape node" err="Get \"https://k8s-worker1:10250/metrics/resource\": diaI0721 13:43:04.172117 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:43:14.083706 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve" I0721 13:43:24.085370 1 server.go:191] "Failed probe" probe="metric-storage-ready" err="no metrics to serve"
3回目(helm upgrade)
上記を見て理解しました。
node間の通信のため、”–kubelet-preferred-address-types=InternalIP” と “–kubelet-insecure-tls” が必要と思われます。
values.yaml を下記のように作成しました。
apiService: create: true extraArgs: - --kubelet-preferred-address-types=InternalIP - --kubelet-insecure-tls namespaceOverride: metrics-server
helm upgrade
helm upgrade metrics-server bitnami/metrics-server --version 7.2.8 --namespace metrics-server -f values.yaml
log確認
大丈夫そうです。
$ kubectl logs metrics-server-5d8d9f9c6d-cfz9l --namespace=metrics-server --namespace=metrics-server I0721 13:51:36.043372 1 serving.go:374] Generated self-signed cert (apiserver.local.config/certificates/apiserver.crt, apiserver.local.config/certificates/apiserver.key) I0721 13:51:46.246554 1 handler.go:275] Adding GroupVersion metrics.k8s.io v1beta1 to ResourceManager I0721 13:51:47.442032 1 requestheader_controller.go:169] Starting RequestHeaderAuthRequestController I0721 13:51:47.442054 1 configmap_cafile_content.go:202] "Starting controller" name="client-ca::kube-system::extension-apiserver-authentication::client-ca-file" I0721 13:51:47.442100 1 shared_informer.go:311] Waiting for caches to sync for RequestHeaderAuthRequestController I0721 13:51:47.442114 1 shared_informer.go:311] Waiting for caches to sync for client-ca::kube-system::extension-apiserver-authentication::client-ca-file I0721 13:51:47.442155 1 configmap_cafile_content.go:202] "Starting controller" name="client-ca::kube-system::extension-apiserver-authentication::requestheader-client-ca-file" I0721 13:51:47.442227 1 shared_informer.go:311] Waiting for caches to sync for client-ca::kube-system::extension-apiserver-authentication::requestheader-client-ca-file I0721 13:51:47.447962 1 dynamic_serving_content.go:132] "Starting controller" name="serving-cert::apiserver.local.config/certificates/apiserver.crt::apiserver.local.config/certificates/apiserver.key" I0721 13:51:47.542394 1 secure_serving.go:213] Serving securely on [::]:8443 I0721 13:51:47.542489 1 shared_informer.go:318] Caches are synced for client-ca::kube-system::extension-apiserver-authentication::client-ca-file I0721 13:51:47.542626 1 tlsconfig.go:240] "Starting DynamicServingCertificateController" I0721 13:51:47.542649 1 shared_informer.go:318] Caches are synced for client-ca::kube-system::extension-apiserver-authentication::requestheader-client-ca-file I0721 13:51:47.542715 1 shared_informer.go:318] Caches are synced for RequestHeaderAuthRequestController
podのチェック
READYになりました。
$ k get pod NAME READY STATUS RESTARTS AGE metrics-server-5d8d9f9c6d-cfz9l 1/1 Running 0 74s
kubectl top
実行できるようになりました。
$ k top nodes NAME CPU(cores) CPU% MEMORY(bytes) MEMORY% k8s-ctrl1 442m 11% 1241Mi 16% k8s-ctrl2 437m 10% 1240Mi 16% k8s-ctrl3 474m 11% 1253Mi 16% k8s-worker1 383m 4% 3532Mi 22% k8s-worker2 177m 2% 2519Mi 7% k8s-worker3 322m 4% 2879Mi 9%
