May 6

How to fix kubectl exec plugin invalid apiVersion client.authentication.k8s.io/v1alpha1

in case you are getting this error after updating kubectl — in case you are getting this error after updating kubectl error: exec plugin: invalid apiVersion "client.authentication.k8s.io/v1alpha1" Double check the current version kubectl version if you are at Major:1 and Minor: 24, then you probably need to downgrade to 1.23.6 How to do that on Apple Silicon /M1 cd /tmp sudo rm -f /usr/local/bin/kubectl curl -LO "https://dl.k8s.io/release/v1.23.6/bin/darwin/arm64/kubectl" chmod +x ./kubectl sudo mv ./kubectl /usr/local/bin/kubectl sudo chown root: /usr/local/bin/kubectl kubectl version

Kubectl

1 min read

How to fix kubectl exec plugin invalid apiVersion client.authentication.k8s.io/v1alpha1

in case you are getting this error after updating kubectl

error: exec plugin: invalid apiVersion "client.authentication.k8s.io/v1alpha1"

Double check the current version

 kubectl version

if you are at Major:1 and Minor: 24, then you probably need to downgrade to 1.23.6

How to do that on Apple Silicon /M1

cd /tmp
sudo rm -f /usr/local/bin/kubectl
curl -LO "https://dl.k8s.io/release/v1.23.6/bin/darwin/arm64/kubectl"
chmod +x ./kubectl
sudo mv ./kubectl /usr/local/bin/kubectl
sudo chown root: /usr/local/bin/kubectl
kubectl version

Full instructions here

Apr 21

Nginx proxy instead of webpack (via docker)

A proxy is needed to solve CORS problems when contacting the backend — A proxy is needed to solve CORS problems when contacting the backend Frontend and backend normally run on different domains causing CORS problems, so you normally need to have the backend responding under a subpath (/api) under the same domain where the FE is served. Webpack or Nginx ? You can solve that via webpack proxy, but you can also us the more advanced nginx that…

Webpack

2 min read

Apr 17

Pass env vars to react via webpack

When loaded via webpack, REACT_APP_ variable are not visible from react components. — When loaded via webpack, REACT_APP_ variable are not visible from react components. To make custom variable vibible inside tsx files, define them in webpack via the DefinePlugin. # webpack.config.js .. here you can read the process.env.variables from node const PROCESS_ENV_NODE_ENV = process.env.NODE_ENV ? process.env.NODE_ENV : 'local';

React

1 min read

Pass env vars to react via webpack

When loaded via webpack, REACT_APP_ variable are not visible from react components.

To make custom variable vibible inside tsx files, define them in webpack via the DefinePlugin.

# webpack.config.js.. here you can read the process.env.variables from nodeconst PROCESS_ENV_NODE_ENV = process.env.NODE_ENV ? process.env.NODE_ENV : 'local';module.exports = {
... new webpack.DefinePlugin({
    ... 
    'process.env.REACT_APP_ENVIRONMENT': JSON.stringify(PROCESS_ENV_NODE_ENV), 
}),
...
};The you can read them in react by accessing`process.env.REACT_APP_ENVIRONMENT`Note 1: In my current version, it didn't work  with variable named PROCESS_ENV
Note 2: the prefix  process.env is mandatory for the variable

Feb 14

Spring Boot — print Hibernate SQL statements and parameters during integration tests without editing config files

IntelliJ JUnit test config to use ENV vars and override hibernate logging — Override of application properties from ENV vars Spring supports override of application properties from environment variables. As explained in the related section (v2.4.5), …

Spring Boot

2 min read

Feb 11

PostgreSQL recursive query explained with a bare minimum dataset and example

Postgres allows to run recursive queries, by using a special syntax that allows to build the final resulting rows by referring to the… — Postgres allows to run recursive queries, by using a special syntax that allows to name the final data set and recursively refer to it via Common Table Expressions. When do you need them ? In case you are storing hierarchical data (e.g. a tree) in a relational format (e.g. where…

Postgres

3 min read

Jan 29

How to test and push to the registry a Spring Boot app on Gitlab CI

Spring Boot app built (integration tests with testcontainers) and images taged and pushed at every commit — Spring Boot app built (integration tests with testcontainers) and images taged and pushed at every commit Root gitlab-ci.yml Place a .gitlab-ci.yml into the repository, define the stages (just names you came up with, you’ll see later what they mean) and include the specific files for each subproject to build for…

Spring Boot

2 min read

Jan 29

Dockerizing a React and Spring Boot application

I’ll explain below in the detail how to create containers (via Dockerfile) for a React and also a Spring Boot application with Postgres (or… — I’ll explain below in the detail how to create containers (via Dockerfile) for a React and also a Spring Boot application with Postgres (or MySQL). One does not require the other, so you can use this guide to build either one. I’ll also present a docker-compose file useful (but not…

Docker

3 min read

Jan 19

Multiple SSH key for different github/gitlab account

How to use two accounts (and related SSH , each one with its one repository — How to configure each repository to use a different key belonging to a different gitlab or github account. Gitlab and Github don’t let you add the same key to different accounts. …

Git

2 min read

Multiple SSH key for different github or gitlab account

Jan 5

Atom Command line with JetBrains (IntelliJ/WebStorm) shortcuts

If you need a lightweight editor to edit some content/notes, but IntelliJ is too slow to start, you can use the free Atom. — If you need a lightweight editor to edit some content/notes, but IntelliJ is too slow to start, you can use the free Atom. Install Atom Download from here Command line (Mac OSX) Paste this into your bash init file (~/.zshrc or ~/.bash_profile) atom() { open -na "Atom.app" --args "$@" }

Atom

1 min read

Atom Command line with JetBrains (IntelliJ/WebStorm) shortcuts

If you need a lightweight editor to edit some content/notes, but IntelliJ is too slow to start, you can use the free Atom.

Install Atom

Download from here

Command line (Mac OSX)

Paste this into your bash init file (~/.zshrc or ~/.bash_profile)

atom() { open -na "Atom.app" --args "$@" }

or place the following into `/usr/local/bin/atom`

#/bin/sh
open -na "Atom.app" --args "$@"

To use, just type atom ~/your-dir or atom ~/path/to/your-file

Set Webstorm/IntelliJ shortcuts

Follow the instructions here

open the Atom menu, and select Install Shell Commands
apm install intellij-idea-keymap

Dec 28, 2021

Git: local and remote basics, log ranges, and a script to sync via rebasing

Git basics on local and remote, log ranges to compare, and bash script to update via rebasing — How git push and pull work (skip if you already know) The git command git pull (well explained here) is basically the composition of git fetch (to get the data from the remote repository) followed by a git merge. Once you run it, the command will run the fetch (network operation taking some time), and — if there are no incoming…

Git

3 min read