arashkaffamanesh

Free VMware License Keys / ESXi ISOs

They should work. Works for all cores of your host system. Also you can download ESXi from here.

Links:

vCenter

• vCenter Server 8 Standard
• vCenter Server 7

ESXi

• ESXi 8
• ESXi 7 Enterprise Plus

arashkaffamanesh

#!/usr/bin/env bash
#
#  Run this as root on the first master node. You must be able to ssh as the root user to each node via ssh keys
#  installed at /root/.ssh/ on the first master node. The public ssh key MUST be in the /root/.ssh/authorized_keys
#  file on ALL nodes including the first master. Use "ssh-keygen" to create an ssh keypair and use "ssh-copy-id NODE_IP"
#  to distribute the public key to ALL nodes. The nodes also need to be configured for passwordless sudo, most cloud
#  providers and infrastructure provisioners do this by default.
#
#  The following commands are used to perpare a generic EC2 or GCE instance and run the script.
#       # enter an interactive sudo session

arashkaffamanesh

1) Install Ubuntu on nodes and set hostname and IP on all nodes

2) Prepare nodes. Run these commands as the root user on all nodes
	
	#turn off swap
	swapoff -a
	
	#install packages
	apt-get install -y ntp docker.io

arashkaffamanesh

EKS on ARM

The xarm-install.sh script allows you to install and use Amazon EKS on ARM (xARM) with a single command.

Make sure you have aws, eksctl, kubectl, and jq installed. So far tested with bash on macOS.

chmod +x xarm-install.sh

./xarm-install.sh

arashkaffamanesh

#!/bin/bash
RANCHERENDPOINT=https://your_rancher_endpoint/v3
# The name of the cluster where the user needs to be added
CLUSTERNAME=your_cluster_name
# Username, password and realname of the user
USERNAME=username
PASSWORD=password
REALNAME=myrealname
# Role of the user
GLOBALROLE=user

arashkaffamanesh

I've been working with Kafka for over 7 years. I inevitably find myself doing the same set of activities while I'm developing or working with someone else's system. Here's a set of Kafka productivity hacks for doing a few things way faster than you're probably doing them now. 🔥

• Show me all my Kafka topics and their partitions, replicas, and consumers
• Show me the contents of a topic
• Create a Kafka topic
• Produce messages to a Kafka topic
• Validate the schema of messages before producing to a topic
• Do all of this at a distance

Get the tools

arashkaffamanesh

Force Kubernetes to pull latest container image in a deployment

kubectl patch deployment DEPLOYMENT_NAME -p "{\"spec\":{\"template\":{\"metadata\":{\"labels\":{\"date\":\"`date +'%s'`\"}}}}}"

arashkaffamanesh

for SERVICES in etcd kube-apiserver kube-controller-manager kube-scheduler flanneld; do
	systemctl restart $SERVICES
	systemctl enable $SERVICES
	systemctl status $SERVICES
done

restart kubelet/node services

for SERVICES in kube-proxy kubelet flanneld docker; do

systemctl restart $SERVICES

arashkaffamanesh

apiVersion: v1
kind: Namespace
metadata:
  name: rook-ceph-system
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: cephclusters.ceph.rook.io
spec:

arashkaffamanesh

#!/bin/sh
docker rm -f $(docker ps -qa)
docker rmi -f $(docker images -q)
docker volume rm $(docker volume ls -q)
for mount in $(mount | grep tmpfs | grep '/var/lib/kubelet' | awk '{ print $3 }') /var/lib/kubelet /var/lib/rancher; do umount $mount; done
cleanupdirs="/etc/ceph /etc/cni /etc/kubernetes /opt/cni /opt/rke /run/secrets/kubernetes.io /run/calico /run/flannel /var/lib/calico /var/lib/etcd /var/lib/cni /var/lib/kubelet /var/lib/rancher/rke/log /var/log/containers /var/log/pods /var/run/calico"
for dir in $cleanupdirs; do
  echo "Removing $dir"
  rm -rf $dir
done