KubernetesやUIのダッシュボードの激しいバージョン更新にも関わらず、DNSやyamlのプロパディー値の整合性ために、kubernetes、kubectl、dashboard、helmのバージョンが相互適当なものに揃わなければならない。
目次, kubectlをインストールする, minikubeをインストールする, kubernetesをインストールする, kubernetesのクラスタ情報を表示させる, Dashboardをインストールする, weavescopeをインストールする, helmをインストールする, PrometheusとGrafanaをインストールする, kubefwdをインストールする
ryoji@ubuntu:~$ kubectl version
Client Version: version.Info{
Major:"1",
Minor:"17",
GitVersion:"v1.17.0",
GitCommit:"70132b0f130acc0bed193d9ba59dd186f0e634cf",
GitTreeState:"clean",
BuildDate:"2019-12-07T21:20:10Z",
GoVersion:"go1.13.4",
Compiler:"gc",
Platform:"linux/amd64"
}
Server Version: version.Info{
Major:"1",
Minor:"17",
GitVersion:"v1.17.2",
GitCommit:"59603c6e503c87169aea6106f57b9f242f64df89",
GitTreeState:"clean",
BuildDate:"2020-01-18T23:22:30Z",
GoVersion:"go1.13.5",
Compiler:"gc",
Platform:"linux/amd64"
}
| ツール | バージョン |
|---|---|
| kubectl | v1.17.0 |
| minikube | v1.7.1 |
| kubernetes | v1.17.2 |
| helm | v3.0.2 |
それぞれ集めるわけですが、実のところ一番簡単にすませるには、VSCodeのイクステンションがよしなに自動的にダウンロードしてきてくれるので、それを使うといい。
ryoji@ubuntu:~/.vs-kubernetes$ ./tools/kubectl/kubectl version
Client Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.0", GitCommit:"70132b0f130acc0bed193d9ba59dd186f0e634cf", GitTreeState:"clean", BuildDate:"2019-12-07T21:20:10Z", GoVersion:"go1.13.4", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.2", GitCommit:"59603c6e503c87169aea6106f57b9f242f64df89", GitTreeState:"clean", BuildDate:"2020-01-18T23:22:30Z", GoVersion:"go1.13.5", Compiler:"gc", Platform:"linux/amd64"}
ryoji@ubuntu:~/.vs-kubernetes$ ./tools/minikube/linux-amd64/minikube version
minikube version: v1.7.2
commit: 50d543b5fcb0e1c0d7c27b1398a9a9790df09dfb
ryoji@ubuntu:~/.vs-kubernetes$ ./tools/helm/linux-amd64/helm version
version.BuildInfo{Version:"v3.0.2", GitCommit:"19e47ee3283ae98139d98460de796c1be1e3975f", GitTreeState:"clean", GoVersion:"go1.13.5"}
参: https://kubernetes.io/docs/tasks/tools/install-kubectl/
ryoji@ubuntu:~$ which kubectl /home/ryoji/.local/bin/kubectl
curl -LO https://storage.googleapis.com/kubernetes-release/release/v1.17.0/bin/linux/amd64/kubectl
参: https://kubernetes.io/docs/tasks/tools/install-minikube/
参: https://github.com/kubernetes/minikube/releases/tag/v1.7.1
ryoji@ubuntu:~$ minikube version minikube version: v1.7.1 commit: 7de0325eedac0fbe3aabacfcc43a63eb5d029fda
curl -LO https://github.com/kubernetes/minikube/releases/download/v1.7.1/minikube-linux-amd64
ryoji@ubuntu:~$ minikube start --vm-driver=virtualbox --kubernetes-version=1.17.2 😄 minikube v1.7.1 on Ubuntu 18.04 ✨ Using the virtualbox driver based on user configuration 🔥 Creating virtualbox VM (CPUs=2, Memory=2000MB, Disk=20000MB) ... 🐳 Preparing Kubernetes v1.17.2 on Docker '19.03.5' ... 💾 Downloading kubelet v1.17.2 💾 Downloading kubectl v1.17.2 💾 Downloading kubeadm v1.17.2 🚜 Pulling images ... 🚀 Launching Kubernetes ... 🌟 Enabling addons: default-storageclass, storage-provisioner ⌛ Waiting for cluster to come online ... 🏄 Done! kubectl is now configured to use "minikube"
参: https://code.visualstudio.com/docs/azure/kubernetes
ここで問題があった場合には、~/.kube/configに書かれている情報がなにかと手助けになるかもしれない。
ryoji@ubuntu:~$ minikube dashboard 🔌 Enabling dashboard ... 🤔 Verifying dashboard health ... 🚀 Launching proxy ... 🤔 Verifying proxy health ... 🎉 Opening http://127.0.0.1:37351/api/v1/namespaces/kubernetes-dashboard/services/http:kubernetes-dashboard:/proxy/ in your default browser...
minikube sshというコマンドもあるので、使ってみてほしい。
ryoji@ubuntu:~$ minikube ssh
_ _
_ _ ( ) ( )
___ ___ (_) ___ (_)| |/') _ _ | |_ __
/' _ ` _ `\| |/' _ `\| || , < ( ) ( )| '_`\ /'__`\
| ( ) ( ) || || ( ) || || |\`\ | (_) || |_) )( ___/
(_) (_) (_)(_)(_) (_)(_)(_) (_)`\___/'(_,__/'`\____)
$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
k8s.gcr.io/kube-proxy v1.17.2 cba2a99699bd 3 weeks ago 116MB
k8s.gcr.io/kube-controller-manager v1.17.2 da5fd66c4068 3 weeks ago 161MB
k8s.gcr.io/kube-apiserver v1.17.2 41ef50a5f06a 3 weeks ago 171MB
k8s.gcr.io/kube-scheduler v1.17.2 f52d4c527ef2 3 weeks ago 94.4MB
kubernetesui/dashboard v2.0.0-beta8 eb51a3597525 2 months ago 90.8MB
k8s.gcr.io/coredns 1.6.5 70f311871ae1 3 months ago 41.6MB
k8s.gcr.io/etcd 3.4.3-0 303ce5db0e90 3 months ago 288MB
kubernetesui/metrics-scraper v1.0.2 3b08661dc379 3 months ago 40.1MB
k8s.gcr.io/pause 3.1 da86e6ba6ca1 2 years ago 742kB
gcr.io/k8s-minikube/storage-provisioner v1.8.1 4689081edb10 2 years ago 80.8MB
kubectlでDashboardを手動でインストールしようしてはいけない。 問題にぶち当たる。
-f v1.10.1/src/deploy/recommended/kubernetes-dashboard.yaml
-f v2.0.0-beta7/aio/deploy/recommended.yaml
参: https://www.weave.works/docs/scope/latest/installing/
ryoji@ubuntu:~$ kubectl apply -f "https://cloud.weave.works/k8s/scope.yaml?k8s-version=$(kubectl version | base64 | tr -d '\n')" namespace/weave created serviceaccount/weave-scope created clusterrole.rbac.authorization.k8s.io/weave-scope created clusterrolebinding.rbac.authorization.k8s.io/weave-scope created deployment.apps/weave-scope-app created service/weave-scope-app created deployment.apps/weave-scope-cluster-agent created daemonset.apps/weave-scope-agent created
NodePortというのをつかうとProxy無しでサービスにアクセスできるので、設定しておくといい。
- Serviceの中にあるClusterIPをNodePortタイプに変更する。
- サービスのアドレスを取得する。
ryoji@ubuntu:~$ minikube service weave-scope-app -n weave --url http://192.168.99.100:31418
参: https://helm.sh/docs/intro/install/
参: https://github.com/helm/helm/releases/tag/v3.0.2
curl -LO https://get.helm.sh/helm-v3.0.2-linux-amd64.tar.gz
参: https://medium.com/@at_ishikawa/install-prometheus-and-grafana-by-helm-9784c73a3e97
helm repo add stable https://kubernetes-charts.storage.googleapis.com
ryoji@ubuntu:~$ helm install prometheus stable/prometheus
NAME: prometheus
LAST DEPLOYED: Mon Feb 10 19:42:11 2020
NAMESPACE: default
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
The Prometheus server can be accessed via port 80 on the following DNS name from within your cluster:
prometheus-server.default.svc.cluster.local
Get the Prometheus server URL by running these commands in the same shell:
export POD_NAME=$(kubectl get pods --namespace default -l "app=prometheus,component=server" -o jsonpath="{.items[0].metadata.name}")
kubectl --namespace default port-forward $POD_NAME 9090
The Prometheus alertmanager can be accessed via port 80 on the following DNS name from within your cluster:
prometheus-alertmanager.default.svc.cluster.local
Get the Alertmanager URL by running these commands in the same shell:
export POD_NAME=$(kubectl get pods --namespace default -l "app=prometheus,component=alertmanager" -o jsonpath="{.items[0].metadata.name}")
kubectl --namespace default port-forward $POD_NAME 9093
#################################################################################
###### WARNING: Pod Security Policy has been moved to a global property. #####
###### use .Values.podSecurityPolicy.enabled with pod-based #####
###### annotations #####
###### (e.g. .Values.nodeExporter.podSecurityPolicy.annotations) #####
#################################################################################
The Prometheus PushGateway can be accessed via port 9091 on the following DNS name from within your cluster:
prometheus-pushgateway.default.svc.cluster.local
Get the PushGateway URL by running these commands in the same shell:
export POD_NAME=$(kubectl get pods --namespace default -l "app=prometheus,component=pushgateway" -o jsonpath="{.items[0].metadata.name}")
kubectl --namespace default port-forward $POD_NAME 9091
For more information on running Prometheus, visit:
https://prometheus.io/
ryoji@ubuntu:~$ helm install grafana stable/grafana
NAME: grafana
LAST DEPLOYED: Mon Feb 10 19:43:41 2020
NAMESPACE: default
STATUS: deployed
REVISION: 1
NOTES:
1. Get your 'admin' user password by running:
kubectl get secret --namespace default grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo
2. The Grafana server can be accessed via port 80 on the following DNS name from within your cluster:
grafana.default.svc.cluster.local
Get the Grafana URL to visit by running these commands in the same shell:
export POD_NAME=$(kubectl get pods --namespace default -l "app=grafana,release=grafana" -o jsonpath="{.items[0].metadata.name}")
kubectl --namespace default port-forward $POD_NAME 3000
3. Login with the password from step 1 and the username: admin
#################################################################################
###### WARNING: Persistence is disabled!!! You will lose your data when #####
###### the Grafana pod is terminated. #####
#################################################################################
実はユーザーadminのパスワードはこのコマンドで取得できる。
kubectl get secret --namespace default grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo
参: https://github.com/txn2/kubefwd/releases/tag/1.11.1
ryoji@ubuntu:/media/VirtualBox VMs$ kubefwd version INFO[17:50:45] _ _ __ _ INFO[17:50:45] | | ___ _| |__ ___ / _|_ ____| | INFO[17:50:45] | |/ / | | | '_ \ / _ \ |_\ \ /\ / / _ | INFO[17:50:45] | <| |_| | |_) | __/ _|\ V V / (_| | INFO[17:50:45] |_|\_\\__,_|_.__/ \___|_| \_/\_/ \__,_| INFO[17:50:45] INFO[17:50:45] Version 1.11.1 INFO[17:50:45] https://github.com/txn2/kubefwd INFO[17:50:45] Kubefwd version: 1.11.1 https://github.com/txn2/kubefwd
curl -LO https://github.com/txn2/kubefwd/releases/download/1.11.1/kubefwd_linux_amd64.tar.gz
ryoji@ubuntu:~$ sudo kubefwd svc -n default [sudo] password for ryoji: INFO[20:04:20] _ _ __ _ INFO[20:04:20] | | ___ _| |__ ___ / _|_ ____| | INFO[20:04:20] | |/ / | | | '_ \ / _ \ |_\ \ /\ / / _ | INFO[20:04:20] | <| |_| | |_) | __/ _|\ V V / (_| | INFO[20:04:20] |_|\_\\__,_|_.__/ \___|_| \_/\_/ \__,_| INFO[20:04:20] INFO[20:04:20] Version 1.11.1 INFO[20:04:20] https://github.com/txn2/kubefwd INFO[20:04:20] INFO[20:04:20] Press [Ctrl-C] to stop forwarding. INFO[20:04:20] 'cat /etc/hosts' to see all host entries. INFO[20:04:20] Loaded hosts file /etc/hosts INFO[20:04:20] Hostfile management: Original hosts backup already exists at /home/ryoji/hosts.original INFO[20:04:20] Forwarding: prometheus-kube-state-metrics:80 to pod prometheus-kube-state-metrics-dbb8f96c-4z8dw:8080 INFO[20:04:20] Forwarding: prometheus-kube-state-metrics:81 to pod prometheus-kube-state-metrics-dbb8f96c-4z8dw:8081 INFO[20:04:20] Forwarding: prometheus-kube-state-metrics-dbb8f96c-4z8dw.prometheus-kube-state-metrics:80 to pod prometheus-kube-state-metrics-dbb8f96c-4z8dw:8080 INFO[20:04:20] Forwarding: prometheus-kube-state-metrics-dbb8f96c-4z8dw.prometheus-kube-state-metrics:81 to pod prometheus-kube-state-metrics-dbb8f96c-4z8dw:8081 INFO[20:04:20] Forwarding: prometheus-alertmanager:80 to pod prometheus-alertmanager-cddcc88d6-z88tv:9093 INFO[20:04:21] Forwarding: prometheus-pushgateway:9091 to pod prometheus-pushgateway-75946db59c-zf6sf:9091 WARN[20:04:21] WARNING: No Pod selector for service kubernetes in default on cluster . INFO[20:04:21] Forwarding: prometheus-node-exporter:9100 to pod prometheus-node-exporter-6fnwg:9100 INFO[20:04:21] Forwarding: prometheus-node-exporter-6fnwg.prometheus-node-exporter:9100 to pod prometheus-node-exporter-6fnwg:9100 INFO[20:04:22] Forwarding: prometheus-server:80 to pod prometheus-server-746dd86648-g4nq6:9090 INFO[20:04:23] Forwarding: grafana:80 to pod grafana-69f9d77964-6275v:3000
