rafaeltuelho

My Openshift Cheatsheet

Project Quotes, Limits and Templates

• Cluster Quota

oc create clusterquota env-qa \
    --project-label-selector environment=qa \
    --hard pods=10,services=5
    
oc create clusterquota user-qa \

p4tin

Kubernetes Wordpress installation

Use minikube to test with

• on macos: ** brew cask install minikube ** minikube start

Start the cluster and scale:

• kubectl create secret generic mysql-pass --from-literal=password=YOUR_PASSWORD

contentfree

// WHO Reports: https://www.who.int/emergencies/diseases/novel-coronavirus-2019/situation-reports
// Inspired by: https://twitter.com/paulg/status/1235247452145451013
// Note: The growth rate does not seem sustainable.
// The projected OoC infections assumes a constant doubling of roughly every 4 days.
Date	Projected-OoC-Infections WHO-Reported-OoC-Infections
2020-02-29	5,629   6,009
2020-03-01	6,755   7,169
2020-03-02	8,106   8,774
2020-03-03	9,727   10,565
2020-03-04	11,673  12,669

carlosedp

Openshift 4 vSphere Install

Pre-reqs

1. Reserve one IP for Bootstrap Node
2. Reserve three IPs for Control-Plane Nodes
3. Reserve two or three IPs for Infra-Nodes
4. Check if Control-plane Load-Balancer VIP points to four IPs (Bootstrap + Control-Plane nodes)
5. Check if Infra-Node Load-Balancer VIP points to the Infra-Node IPs
6. Check created DNS entries:

williamcaban

Using Sushy Tools with Libvirt

• Add linux user to libvirt group

sudo usermod -a -G libvirt <your-user>
sudo -y install libvirt-devel gcc python3-devel

• Login and validate user can execute virsh commands

displague

#!ipxe
dhcp net0

# https://www.centos.org/download/mirrors/
set mirror http://mirror.pit.teraswitch.com

# x86_64, aarch_64, ppc64le
set arch x86_64

set path /centos/8-stream/BaseOS/x86_64/os

jparrill

apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: master 
  name: egress-limit-ssh
spec:
  config:
    ignition:
      version: 3.2.0