From bd593ee8edf7d987862280bba69c646cbcf002ab Mon Sep 17 00:00:00 2001 From: lkxed Date: Fri, 16 Sep 2022 12:31:25 +0800 Subject: [PATCH] =?UTF-8?q?[=E6=89=8B=E5=8A=A8=E9=80=89=E9=A2=98][tech]:?= =?UTF-8?q?=2020220915=20Monitoring=20and=20Debugging=20Kubernetes=20with?= =?UTF-8?q?=20Lens=20Desktop.md?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- ... Debugging Kubernetes with Lens Desktop.md | 241 ++++++++++++++++++ 1 file changed, 241 insertions(+) create mode 100644 sources/tech/20220915 Monitoring and Debugging Kubernetes with Lens Desktop.md diff --git a/sources/tech/20220915 Monitoring and Debugging Kubernetes with Lens Desktop.md b/sources/tech/20220915 Monitoring and Debugging Kubernetes with Lens Desktop.md new file mode 100644 index 0000000000..4ff1930a90 --- /dev/null +++ b/sources/tech/20220915 Monitoring and Debugging Kubernetes with Lens Desktop.md @@ -0,0 +1,241 @@ +[#]: subject: "Monitoring and Debugging Kubernetes with Lens Desktop" +[#]: via: "https://www.opensourceforu.com/2022/09/monitoring-and-debugging-kubernetes-with-lens-desktop/" +[#]: author: "Mitesh Soni https://www.opensourceforu.com/author/mitesh_soni/" +[#]: collector: "lkxed" +[#]: translator: " " +[#]: reviewer: " " +[#]: publisher: " " +[#]: url: " " + +Monitoring and Debugging Kubernetes with Lens Desktop +====== +*Lens Desktop is an exciting platform for working with Kubernetes. It is a distribution of the OpenLens repository with specific customisations. In this article we will see what Lens Desktop can do and how it works.* + +Lens Desktop is free of charge. For more details, you can visit *https://k8slens.dev/pricing.html.* A few benefits of using Lens Desktop are: + +* Simplicity and increased productivity – no need to learn kubectl commands +* Visibility in existing Kubernetes resources +* Built on open source +* Observability — live statistics, events, and log streams in real-time +* Errors and warnings are directly available on the Lens dashboard +* Supports EKS, AKS, GKE, Minikube, Rancher, k0s, k3s, OpenShift +* Huge community support — 450,000 users and 17,000 stars on GitHub + +### Minikube installation + +Minikube is a tool that is used to run Kubernetes locally. It runs a single-node Kubernetes cluster so that hands-on work can be done on Kubernetes for daily software development. + +We will use minikube and verify the usage of Lens. Let’s install minikube on a Windows based system first. You can also install it on other operating systems, virtual machines or laptops. + +* Two or more CPUs +* 2GB of RAM +* 20GB of free disk space +* Internet connectivity +* Container or virtual machine manager such as Docker or VirtualBox + +From a terminal or command prompt, execute the minikube start command. + +``` +minikube start --driver=virtualbox +* minikube v1.12.3 on Microsoft Windows 10 Home Single Language 10.0.19044 Build 19044 +* Using the virtualbox driver based on existing profile +* minikube 1.26.0 is available! Download it: https://github.com/kubernetes/minikube/releases/tag/v1.26.0 +* To disable this notice, run: ‘minikube config set WantUpdateNotification false’ +* Starting control plane node minikube in cluster minikube +* virtualbox “minikube” VM is missing, will recreate. +* Creating virtualbox VM (CPUs=2, Memory=3000MB, Disk=20000MB) ... +! This VM is having trouble accessing https://k8s.gcr.io +* To pull new external images, you may need to configure a proxy: https://minikube.sigs.k8s.io/docs/reference/networking/proxy/ +* Preparing Kubernetes v1.18.3 on Docker 19.03.12 ... +* Verifying Kubernetes components... +* Enabled addons: default-storageclass, storage-provisioner +* Done! kubectl is now configured to use “minikube” +``` + +Go to your virtual box and verify the newly created minikube virtual machine (Figure 1). + +![Figure 1: Minikube virtual machine in virtual box][1] + +Now verify the existing status of minikube using the *minikube* status command. + +``` +C:\>minikube status +minikube +type: Control Plane +host: Running +kubelet: Running +apiserver: Running +kubeconfig: Configured +``` + +Next, use the *kubectl cluster-info* command to get details about kubeDNS. + +``` +kubectl cluster-info +Kubernetes master is running at https://192.168.99.103:8443 +KubeDNS is running at https://192.168.99.103:8443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy +``` + +To get more details on debugging and to diagnose cluster problems, use the *kubectl cluster-info* dump command. + +Once minikube is ready, install kubectl *[(https://kubernetes.io/docs/tasks/tools/)][2]*. It is a command line cluster that is used to run commands against Kubernetes clusters and minikube as well. + +![Figure 2: Lens][3] + +Execute the *kubectl get* *nodes* command to get details on all nodes and, in this case, minikube. + +``` +C:\>kubectl get nodes +NAME STATUS ROLES AGE VERSION +minikube Ready master 7m57s v1.18.3 +``` + +Use the *kubectl get all* command to get all details for the default name space. + +``` +C:\>kubectl get all +NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE +service/kubernetes ClusterIP 10.96.0.1 443/TCP 7m58s +``` + +We now have a minikube cluster ready with kubectl. The next step is to install and configure Lens and verify the sample applications. + +### Lens installation and configuration + +Go to *https://k8slens.dev/* and download an installable package based on the operating system you have. + +Next, install Lens as per the instruction displayed on the screen. Open Lens after successful installation. You will find a minikube in the catalogue (Figure 3). + +![Figure 3: Lens catalogue][4] + +Click on *minikube* and you will enter the world of minikube clusters, which you will love forever. + +Click on *Nodes* and get the node details that you got after executing the kubectl get nodes commands. + +Now, Lens is ready to use. + +![Figure 4: Lens cluster][5] + +Let’s deploy [https://github.com/GoogleCloudPlatform/microservices-demo][6], which is a cloud-native microservices demo application. It has 11-tier microservices applications, and is a Web based e-commerce app. + +Download the application and extract it locally in the system where you have downloaded and configured minikube. + +Go to the *release* directory and execute the following command. + +``` +kubectl apply -f kubernetes-manifests.yaml + +deployment.apps/emailservice created +service/emailservice created +deployment.apps/checkoutservice created +service/checkoutservice created +deployment.apps/recommendationservice created +service/recommendationservice created +deployment.apps/frontend created +service/frontend created +service/frontend-external created +deployment.apps/paymentservice created +service/paymentservice created +deployment.apps/productcatalogservice created +service/productcatalogservice created +deployment.apps/cartservice created +service/cartservice created +deployment.apps/loadgenerator created +deployment.apps/currencyservice created +service/currencyservice created +deployment.apps/shippingservice created +service/shippingservice created +deployment.apps/redis-cart created +service/redis-cart created +deployment.apps/adservice created +service/adservice created +``` + +The installation of the app will start now, but it will take some time to reflect that we have used kubectl commands. + +![Figure 5: Lens nodes][7] + +``` +kubectl get pods +NAME READY STATUS RESTARTS AGE +adservice-775d8b9bf5-cp7jr 0/1 Pending 0 8h +cartservice-79749895f5-jrq4d 1/1 Running 0 8h +checkoutservice-5645bf9c65-882m4 1/1 Running 0 8h +currencyservice-545c79d477-8rhg7 1/1 Running 0 8h +emailservice-7cc5c74b4f-hk74s 1/1 Running 0 8h +frontend-9cdf787f5-klfkh 1/1 Running 1 8h +loadgenerator-7b6874cb4c-645v9 1/1 Running 0 8h +paymentservice-5f74bc7b87-l4248 1/1 Running 0 8h +productcatalogservice-6846f59899-v4q4w 1/1 Running 0 8h +recommendationservice-d9c6c8b55-m2x9k 1/1 Running 0 8h +redis-cart-57bd646894-v7kfr 0/1 Pending 0 8h +shippingservice-8685dd9855-pmgjm 1/1 Running 0 8h +``` + +Table 1 lists a few commands that you can use to get information from kubectl. + +![Figure 6: Lens pods][8] + +| Description | Command | +| :- | :- | +| List one or more nodes | kubectl get node | +| List all resources in the cluster | kubectl get all –all-namespaces | +| List one or more deployments | kubectl get deployment | +| Display the complete state of one or more deployments | kubectl describe deployment | +| Edit and update one or more deployments on the cluster | kubectl edit deployment | +| Delete deployments | kubectl delete deployment | +| List one or more pods | kubectl get pod | +| Delete a pod | kubectl delete pod | +| Display the complete state of a pod | kubectl describe pod | +| Get a shell to a running single-container pod | kubectl exec -it /bin/bash | +| List secrets | kubectl get secrets | +| List one or more services | kubectl get services | +| Display the complete state of a service | kubectl describe services | +| Edit and update one or more services on the cluster | kubectl edit services / kubectl edit deployment | +| List one or more namespaces | kubectl get namespace | +| Print the logs for a pod | kubectl logs | +| Print the logs for a specific container in a pod | kubectl logs -c | + +Lens can help you get all the information listed in Table 1 and more for a specific cluster. We can also perform edit and delete actions on Kubernetes resources using Lens. + +![Figure 7: Lens deployments][9] + +Let’s see how this works. Select *Pods* in the Workloads section (Figure 6). We can edit, delete, access logs, access terminals of pod from Lens itself. Cool, right? + +![Figure 8: Lens Replicasets][10] + +You can verify all *deployments* in the *Workloads* section (Figure 7), verify all *Replicasets* in the *Workloads* section (Figure 8), all *Secrets* in the *Config* section (Figure 9) and all *Services* in the *Network* section (Figure 10). + +![Figure 9: Lens Secrets][11] + +You can see how easy it is to navigate to all resources, and effectively find all Kubernetes resources from a single place quickly. We can edit YAML files in Lens and apply it at runtime to see the change. + +![Figure 10: Lens Services][12] + +We can also configure multiple clusters deployed by multiple cloud service providers and use Lens for visibility and troubleshooting. + +-------------------------------------------------------------------------------- + +via: https://www.opensourceforu.com/2022/09/monitoring-and-debugging-kubernetes-with-lens-desktop/ + +作者：[Mitesh Soni][a] +选题：[lkxed][b] +译者：[译者ID](https://github.com/译者ID) +校对：[校对者ID](https://github.com/校对者ID) + +本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出 + +[a]: https://www.opensourceforu.com/author/mitesh_soni/ +[b]: https://github.com/lkxed +[1]: https://www.opensourceforu.com/wp-content/uploads/2022/08/Figure-1-Minikube-virtual-machine-in-virtual-box.jpg +[2]: https://kubernetes.io/docs/tasks/tools/ +[3]: https://www.opensourceforu.com/wp-content/uploads/2022/08/Figure-2-Lens.jpg +[4]: https://www.opensourceforu.com/wp-content/uploads/2022/08/Figure-3-Lens-catalogue.jpg +[5]: https://www.opensourceforu.com/wp-content/uploads/2022/08/Figure-4-Lens-cluster.jpg +[6]: https://github.com/GoogleCloudPlatform/microservices-demo +[7]: https://www.opensourceforu.com/wp-content/uploads/2022/08/Figure-5-Lens-nodes.jpg +[8]: https://www.opensourceforu.com/wp-content/uploads/2022/08/Figure-6-Lens-pods.jpg +[9]: https://www.opensourceforu.com/wp-content/uploads/2022/08/Figure-7-Lens-deployments-2.jpg +[10]: https://www.opensourceforu.com/wp-content/uploads/2022/08/Figure-8-Lens-Replicasets.jpg +[11]: https://www.opensourceforu.com/wp-content/uploads/2022/08/Figure-9-Lens-Secrets.jpg +[12]: https://www.opensourceforu.com/wp-content/uploads/2022/08/Figure-10-Lens-Services-1.jpg