Studying Affinity and AntiAffinity can be challenging due to the length of the official documentation. This post is not intended to replace the official docs but to provide a bird’s-eye view of the structure. Some takeaways: affinity is a sub section of pod’s spec The diagram as follow: The full diagram as follow: Please ignore … Read more
Quick commands to work with labels
Create ConfigMap from YAML file Create and use configmap from single values That would create a configmap with a key myval1 = 10000 Of course, you can use multiple –from-literal blocks in a single command. Use a single value from configmap in pod yaml Create and use multiple environment variables from file If you plan … Read more
Let’s look at the following diagram to create Kubernetes Replication Controller: What to remember when creating ReplicationController apiVersion: v1 You can define number of replicas, selector and template under spec spec->template has its own spec section along side metadata You specify containers’ related attributes under template‘s spec Create ReplicationController YAML file example
Update 2025 Please check out the new client here that supports a wide range of PostgreSQL version: https://hub.docker.com/r/dattm24/postgresql-client if you want to customize, here is the repo: https://github.com/datmt/docker-clients/tree/main/postgresql-client Recently I had to write a bash script to truncate all tables on a test database server. Using PgAdmin is a real pain since I have a … Read more
I’ve been trying installing a Kubernetes cluster for while following the official documentation without any success. It turned out the official documentation was missing some important steps (or they put the missing steps else where I couldn’t find). Anyways, if you are struggling to get a Kubernetes up and running, this step by step tutorial … Read more