Configure and docker compose in 5 minutes for docker images — Configure and docker compose in 5 minutes for docker images Introduction Compose is a tool for defining and running multi-container Docker applications. With Compose, you use a YAML file to configure your application’s services. Whenever one has to run more than a container and have them to communicate with another, Docker…

Quick yet gentle introduction in get Kafka running — Quick yet gentle introduction in get Kafka running In this article I am using Kafka 2.8.0 for client and server. Hence one may notice some discrepancy with the use of Zookeeper. This is due to KIP-500 to replace Zookeeper with self-managed quorum. Introduction The best way to introduce Kafka is by…

Many times one would have a need to template-ize a volume and would like to clone it for every new pod creation. ‘Volume Snapshot’ is the… — Many times one would have a need to template-ize a volume and would like to clone it for every new pod creation. ‘Volume Snapshot’ is the name for this. In this article I have put together the steps required to create a master template as PVC create a volume snapshot

Customize Apache Spark 3.0.1 to work with S3 — Customize Apache Spark 3.1.1 to work with S3 / GCS Apache Spark 3.0.1 can be built from source code along with (1) AWS specific binaries to enable reading and writing to s3 (2) GCP specific binaries to enable reading and writing to gcs (3) Azure — at the time of…

A developer’s guide to setting up Vault in kubernetes and using it with kv-store for secrets and userpass access. — A developer’s guide to setting up Vault in kubernetes and using it with kv-store for secrets and userpass access. In this brief write-up, I shall try to provide a quick way to get Vault up and running from a running GKE cluster. Installation Installation of vault can be simplified using helm…

Revised — Revised What is Closure? A closure is the combination of a function and the lexical environment within which that function was declared. The reason it is called a “closure” is that an expression containing free variables is called an “open” expression, and by associating to it the bindings of its free variables, you…

Deploying elasticsearch using kubernetes — Deploying elasticsearch using kubernetes In this article, I would like to provide an example of using StatefulSet to deploy an elasticsearch cluster. The configuration for this setup requires An headless service (for intra-node communication) A LoadBalancer service (for providing REST endpoint to outside world) using Client Nodes only. A StatefulSet…

Understanding how storage works — Understanding how storage works Kubernetes, a container orchestration engine had been built for stateless systems. These are generally the kinds of applications we commonly build. applying deployment configuration for applications does help with this effectively. But, there may be cases where one wants to preserve state in a pod.

Configure Apache Spark with Kubernetes — Configure Apache Spark with Kubernetes Many people like to use k8 for the clustering and scaling capabilities. And many other people like to use Apache Spark for big data processing in a cluster. In order to be able to get best of both worlds, a new experimental resource-manager has been…