alexchiri

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alexchiri

Create a multi-node kind cluster and with a different kubernetes version than default

The instructions in this tutorial are not WSL2 specific, but if you would like to see how to get started with kind in WSL2 (and afterwards follow along with this tutorial), do have a look at this video.

How to create a local multi-node Kubernetes cluster with kind

In order to create a multi-node cluster with kind, we need to create a configuration file. Let's say we want to create a 3 node cluster, 1 control-plane and 2 workers, we would then create the following configuration file (you can save it as kind-config.yaml):

kind: Cluster

alexchiri

Get started with Kubernetes in Docker (kind) in WSL2

The accompanying video for this tutorial is published on https://learn.alexchiri.com

Contents:

• Recommendations
• Install Docker CE for Linux
• Configure Docker to start automatically in our WSL distribution when we log in to Windows
• Install go

alexchiri

What and Why is there Kubernetes?

What?

• 
  • source: https://kubernetes.io/
• In order to better understand, let's continue with a story of "Why?"

Why?

• Short and simplified interpretation of the history
  • 
• source: https://www.pinterest.com/pin/146507794100439642/

alexchiri

What is Jenkins X?

Not a simple answer to the question:

• a CLI
• a collection of community tools
• a way of working

Requirements for going through all these steps:

• A free GitHub organization with 2 free users (one will approve PRs and the other is a bot user used by the pipelines) OR just 2 free users (one will approve PRs and the other is a bot user used bythe pipelines)

alexchiri

#!/bin/bash

sudo apt-get update && sudo apt-get install -y jq curl unzip git python3 apt-transport-https ca-certificates software-properties-common jid ruby-full pkg-config

export KUBECTL_VERSION="v1.15.10"
export HELM_VERSION="v2.16.1"
export EKSCTL_VERSION="0.11.1"
export JX_VERSION="v2.0.1249"

# install kubectl

alexchiri

This is super cool and useful: https://medium.com/faun/kubectl-commands-cheatsheet-43ce8f13adfb Tips & tricks: https://hackernoon.com/top-10-kubernetes-tips-and-tricks-27528c2d0222 Configure bash complete: echo "source <(kubectl completion bash)" >> ~/.bashrc

kubectl get pods --all-namespaces -o custom-columns=NAME:.metadata.name,NAMESPACE:.metadata.namespace,QOS-CLASS:.status.qosClass

etcd guides:

https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/hardware.md#example-hardware-configurations https://github.com/etcd-io/etcd/blob/master/Documentation/op-guide/hardware.md#cpus

alexchiri

{"log":"+ grep -q cloud-provider=azure\n","stream":"stderr","time":"2019-12-01T13:58:36.770044437Z"}
{"log":"+ echo kube-apiserver --proxy-client-key-file=/etc/kubernetes/ssl/kube-apiserver-proxy-client-key.pem --requestheader-client-ca-file=/etc/kubernetes/ssl/kube-apiserver-requestheader-ca.pem --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem --requestheader-username-headers=X-Remote-User --client-ca-file=/etc/kubernetes/ssl/kube-ca.pem --advertise-address=172.31.26.30 --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem --authorization-mode=Node,RBAC --requestheader-allowed-names=kube-apiserver-proxy-client --requestheader-group-headers=X-Remote-Group --runtime-config=authorization.k8s.io/v1beta1=true --tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 --kubelet-preferred-address-types=Interna

alexchiri

1. Official website of the Jenkins X project: Jenkins X. You can find here more information about the Jenkins X components. And I found this article about Prow to be quite good to get a better understanding about the different native Kubernetes CI/CD projects.

2. Create a new cluster using jx and minikube:

jx create cluster minikube --kubernetes-version=v1.15.4

Specify kubernetes version until this issue is fixed. Specify more resources to make sure the initial pipelines can succeed:

alexchiri

Here are four tips you can use today to improve the way you use your hands:

• Use gestures. Don't be afraid to use your hands in the first place. The symplest fix for a stiff presentation is to pull your hands out of your pockets and use them. Don't keep your hands bound when you present. They want to be free.
• Use gestures sparingly. Now that I've told you to use gestures, be careful not to go overboard. Your gestures should be natural. If you try to imitate someone else, you'll look like a Saturday Night Live caricature of a bad politician. Avoid canned gestures. Don't think about what gestures to use. Your story will guide them.
• Use gestures at key moments. Save your most expansive gestures for key moments in the presentation. Reinforce your key messages with purposeful gestures... as long as it feels genuine to your personality and style.
• Keep your gestures within the power sphere. Picture your power sphere as a circle that runs from the top of your eyes, out to the tips of your out