Đạt TrầnWhen working with kubernetes (maybe in a CKA exam), you work with terminal most of the time. Configuring the environment properly is vital to save you time. Here are things I do first when entering a new environment (Kubernetes Playground | Katacoda, for example). Enable bash completion Honestly, I don’t use this much. However, occasionally, … Read more
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 Đạt TrầnI build … Read more
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