Upgrading Kubernetes Upgrading Kubernetes is easy with kops. The cluster spec contains a KubernetesVersion, so you can simply edit it with kops edit, and apply the updated configuration to your cluster. The kops upgrade command also automates checking for and applying updates. It is recommended to run the latest version of Kops to ensure compatibility… Read More »
The Kubernetes release cadence is fast-paced with minor releases every quarter. Awesome! But how do I keep up? Don’t worry, Kops makes it fairly easy to update your HA production cluster without any downtime (assuming you have scaled your deployments to a minimum of 2 pods per deployment). This blog post will walk you through… Read More »
Kafka Connect Quick Start Goal This quick start guide provides a hands-on look at how you can move data into and out of Kafka without writing a single line of code. It is helpful to review the concepts for Kafka Connect in tandem with running the steps in this guide to gain a deeper understanding.… Read More »
Etcd Volume Encryption You must configure etcd volume encryption before bringing up your cluster. You cannot add etcd volume encryption to an already running cluster. Encrypting Etcd Volumes Using the Default AWS KMS Key Edit your cluster to add encryptedVolume: true to each etcd volume: kops edit cluster ${CLUSTER_NAME} … etcdClusters: – etcdMembers: – instanceGroup:… Read More »
Adding heapster metrics to a Kubernetes dashboard on ARM with RBAC Prerequisites: You have a kubernetes cluster with the dashboard plugin installed, see the article from Martin Jensen entitled Kubernetes dashboard on ARM with RBAC for the instructions on how to do that. Kubernetes dashboard on ARM with RBAC In the recent guide about setting… Read More »
Helm is a package manager for Kubernetes. You can bundle Kubernetes resources together as charts that define all the necessary resources and dependencies of an application. You can then use the Helm CLI to install all the pods, services, and ingresses for an application in one simple command. Just like Docker or NuGet, there’s a common public repository for Helm charts that the helm CLI uses… Read More »
For a full overview on Authentication, refer to the official Kubernetes docs on Authentication and Authorization For users, ideally you use an Identity provider for Kubernetes (OpenID Connect). If you are on GKE / ACS you integrate with respective Identity and Access Management frameworks If you self-host kubernetes (which is the case when you use kops), you may… Read More »
To prepare a Windows 10 computer to make an L2TP VPN connection, you must configure the L2TP connection in the network settings. The exact steps could be slightly different, depending on your Control Panel view, and your existing configuration. From the Windows 10 Start Menu, click Settings. Click Network & Internet. On the left navigation menu, select VPN. Click Add… Read More »
Though it is quite east to convert curl requests to corresponding JMeter request. At times you might be stuck with issue like I faced when uploading a file with JMeter HTTP request In a gist I kept getting 404 error when using REStful service to upload a file. After days of investigations I found it that… Read More »
Apache JMeter is the leading open-source tool for load and performance testing. For those of you just getting to grips with JMeter, we’ve put together a three part ‘how to’ series on how to use this powerful tool. (Note: if you’re already a JMeter pro, you might want to take a look at this… Read More »