Ash Tewari

azure

Kusto Queries on AKS Clusters

tewari

Kusto query language can be used to get insights into Azure Kubernetes Service (AKS) clusters. Container insights collects data from AKS clusters and forwards it to Log Analytics workspace, if enabled for a cluster. This data is available for querying in the Azure Monitor. Here is an example of how you can query the pods not in running state in specific namespaces.  The following query includes the name of the AKS cluster and renders the output as a stacked bar chart. You can include multiple AKS clusters in the scope in which this query is executed by clicking on [Select scope] hyperlink. Create an Azure Dashboard panel with this output by clicking on [Pin to dashboard] button. You can also […]

AKS – Adding SSH Keys to VMSS Nodes

tewari

You can connect to Azure Kubernetes Service (AKS) nodes using ssh. It is documented here: Connect with SSH to Azure Kubernetes Service (AKS) cluster nodes for maintenance or troubleshooting. I needed to access nodes on the System node pool for collecting some logs recently, but the process documented above was not working for me. It turns out that there were two different issues, both related to adding your SSH keys to the nodes in a virtual machine scale set (VMSS). This is the az cli command that adds the ssh keys to the VMSS: I was running this command from powershell on a windows host. So, the first modification I needed was to escape the double quotes by doubling them. […]

AKS Supported Kubernetes Versions

tewari

Azure Kubernetes Service (AKS) supports specific versions of Kubernetes.It is necessary to regularly monitor the release of new versions and upgrade your AKS clusters to supported versions in order to remain in compliance with AKS Kubernetes Version Support Policy. AKS announces the planned date of a new minor version release and corresponding old version deprecation via AKS Release notes at least 30 days prior to removal. An email notification is sent to the subscription administrators with the planned version removal dates. You get 30 days from version removal to upgrade to a supported minor version release. Patch versions can be released anytime and you get 30 days from the removal date to upgrade to a supported patch version. You should […]

Ethereum Blockchain-As-A-Service in Azure Cloud

tewari

Ethereum Blockchain (EBaas) as a Service provided by Microsoft Azure and ConsenSys allows for enterprise customers and partners to play, learn, and fail fast at a low cost in a ready-made dev/test/production environment. It will allow them to create private, public and consortium based Blockchain environments very quickly in Azure. In this session, you will learn how to get started with prototyping building blocks of a decentralized application using EBaas in Windows Azure. Venue: Triangle Azure User Group Slides : download.

KeyNode with Node.js and Microsoft Azure

tewari

KeyNode is a application to issue and verify software license keys. Technology stack for KeyNode is Node.js, MongoDB and Microsoft Azure. I had built this functionality with C9.io (a cloud-based IDE with a built-in source code repository and debugger), mongohq (MongoDB as a service – now part of compose.io) and appfog (Cloud PAAS built on top of CloudFoundry). It used SMTP/gmail to email license files. That was the version I created a couple of years ago to issue tamper-proof signed xml license files for CodeDemo (a code snippet tool for developers, presenters and instructors). For KeyNode (open source) I switched to a different toolset : Visual Studio Code and Windows Azure, simplified the code to remove signed xml file and open-sourced it on GitHub. Signed […]

PackRaft with Xamarin and Microsoft Azure

tewari

PackRaft is a cross-platform mobile application built with Xamarin. It integrates with Microsoft Azure services, such as Azure Table Storage and Azure App Service. It is created with Xamarin.Forms for iOS and Android (Windows version will be coming soon).     The purpose of creating this sample application was to expand expertise in cross-platform mobile development with Windows Azure integration, specifically with Xamarin.Forms and Azure App Service. With Xamarin.Forms, it is possible to achieve close to 100% code reuse across these platforms for certain type of apps. Azure App Service provide a set of rich cloud backend services for your mobile applications. PackRaft allows the user to setup a fleet of vehicles of various seating capacities. Groups of riders are assigned to these rides according to the […]