Javier Juarez jjuarez

Upgrading Kubernetes Cluster with Kops, and Things to Watch Out For

Alright! I'd like to apologize for the inactivity for over a year. Very embarrassingly, I totally dropped the good habit. Anyways, today I'd like to share a not so advanced and much shorter walkthrough on how to upgrade Kubernetes with kops.

At Buffer, we host our own k8s (Kubernetes for short) cluster on AWS EC2 instances since we started our journey before AWS EKS. To do this effectively, we use kops. It's an amazing tool that manages pretty much all aspects of cluster management from creation, upgrade, updates and deletions. It never failed us.

How to start?

Okay, upgrading a cluster always makes people nervous, especially a production cluster. Trust me, I've been there! There is a saying, hope is not a strategy. So instead of hoping things will go smoothly, I always have bias that shit will hit the fan if you skip testing. Plus, good luck explaining to people

Tras este tweet que publiqué

He sido freelance, emprendedor y trabajo desde hace años para empresas USA de diversos tamaños en remoto como programador fullstack. Ahora en GitHub. Si puedo ayudar a alguien en orientar su carrera, mis DMs están abiertos. Ask me anything.

he recibido muchos mensajes y escribo aquí algunos de los consejos que he dado en resumen. Nota: algunas cosas son concretas de trabajar en España. Si vas a trabajar desde Sudamérica sólo una nota: tienes la ventaja de la zona horaria para trabajar con EEUU.

Inglés

Tener un buen nivel de inglés es fundamental para poder trabajar con clientes extranjeros. El conocimiento del idioma tiene que mantenerse en el tiempo. Es como mantenerse en forma física; si lo dejas, lo pierdes. Personalmente aunque trabajo 100% en inglés desde hace bastantes años, intento crearme un entorno diario con el idioma para no perderlo:

Overview

The steps below bootstrap an instance of airflow, configured to use the kubernetes airflow executor, working within a minikube cluster.

This guide works with the airflow 1.10 release, however will likely break or have unnecessary extra steps in future releases (based on recent changes to the k8s related files in the airflow source).

Prerequisites

Docker installed
Minikube installed and started

Ruby and Python profilers

CPU profilers

Python

MicroService Proxy Gateway Solutions

Kong, Traefik, Caddy, Linkerd, Fabio, Vulcand, and Netflix Zuul seem to be the most common in microservice proxy/gateway solutions. Kubernetes Ingress is often a simple Ngnix, which is difficult to separate the popularity from other things.

Github Star Trend:

This is just a picture of this link from March 2, 2019

Originally, I had included some other solution

	FROM docker:19.03-dind

	RUN apk add --no-cache \
	ca-certificates

	ENV GOLANG_VERSION 1.11.12

	RUN set -eux; \
	apk add --no-cache --virtual .build-deps \
	bash \

	# non root user example for alpine
	#
	# usage:
	# $ docker build --build-arg "USER=someuser" --tag test .
	# $ docker run --rm test

	FROM alpine

	ARG USER=default
	ENV HOME /home/$USER

	# Replace "projectname" and "username"
	image: golang:1.9

	variables:
	BIN_NAME: projectname
	ARTIFACTS_DIR: artifacts
	GO_PROJECT: gitlab.com/username/projectname

	stages:
	- build

	#!/usr/bin/env python
	import argparse


	def main(command_line=None):
	parser = argparse.ArgumentParser('Blame Praise app')
	parser.add_argument(
	'--debug',
	action='store_true',
	help='Print debug info'

	Some notes from engineering.

	1) Identify the partition

	Mnesia('rabbit@juju-machine-30-lxd-11'): ERROR mnesia_event got {inconsistent_database, running_partitioned_network, 'rabbit@juju-machine-29-lxd-9'}

	$ sudo rabbitmqctl cluster_status

	2) Pick the most reliable node as the master.