William Caban Babilonia williamcaban

apiVersion: v1
kind: Pod
metadata:
  name: static-ip
  annotations:
    k8s.v1.cni.cncf.io/networks: '[
      {
        "name": "<name>", 
 "ips": [ "192.0.2.205/24","2001:333:333::333/64" ],

Create OCP RHCOS LiveCD w/embedded Ignition

Download latest coreos-installer

podman pull quay.io/coreos/coreos-installer:release

Download latest RHCOS LiveCD

curl -O https://mirror.openshift.com/pub/openshift-v4/dependencies/rhcos/pre-release/latest-4.6/rhcos-live.x86_64.iso

OCP RANDOM NOTES

Import all sample images

IMAGES=`oc get is -o go-template --template="{{range .items}}{{.metadata.name}} {{end}}"`

for i in ${IMAGES}; do
  echo "Pulling: $i"
  ./oc import-image $i --all

Using iperf Pods

Create namespace or project for running iperf tests:

oc new-project iperf-test

Create server Pod

rm -f pod-iperf-server.yaml

OCP4 Explicit Manual Upgrades with CLI

Identify the pull image for the release. For example, for the latest OCP 4.4.x the release.txt for the corresponding release. For example here: https://mirror.openshift.com/pub/openshift-v4/clients/ocp/latest-4.4/release.txt

In this example, the latest 4.4.x it is 4.4.3 and it has this entry:

Pull From: quay.io/openshift-release-dev/ocp-release@sha256:039a4ef7c128a049ccf916a1d68ce93e8f5494b44d5a75df60c85e9e7191dacc

Validate your current version is in the list of upgrade path for the desired release. For 4.4.3 these are the possible upgrade paths:

Netflow or sFlow on OpenShift 4 w/OVN Kubernetes

Identify the ovs-node of the Node hosting the Pods to monitor

# oc get pods --selector="app=ovs-node" -o wide
NAME             READY   STATUS    RESTARTS   AGE   IP              NODE       NOMINATED NODE   READINESS GATES
ovs-node-4hldj   1/1     Running   0          47h   198.18.100.16   worker-1   <none>           <none>

ovs-node-bd9ln 1/1 Running 0 47h 198.18.100.12 master-1

	#!/usr/bin/python3
	"""
	Usage: python3 pp-rps-mc.py 1,2,52-53 > ran-rps-netqueues-fix.yaml ; oc apply -f ran-rps-netqueues-fix.yaml

	Updated April 2 2021 -- patch to address issue cnf1360

	This script generates a MachineConfiguration OCP object that
	can be applied to a 4.6 cluster and adds additional tuning
	fixes related to networking.

	apiVersion: machineconfiguration.openshift.io/v1
	kind: MachineConfig
	metadata:
	name: 50-master-blacklist-ipi
	labels:
	machineconfiguration.openshift.io/role: master
	spec:
	config:
	ignition:
	version: 3.1.0

	#!/bin/bash -e

	source set-environment

	# Variables to set, suit to your installation
	export AIRGAP_REGISTRY_INDEX_TAG=olm-index/redhat-operator-index:v$OCP_RELEASE_MAIN
	export AIRGAP_REGISTRY_IMAGE_TAG=olm

	# Set these values to true for the catalog and miror to be created
	export RH_OP='true'

	#version=RHEL8
	ignoredisk --only-use=vda
	# System bootloader configuration
	bootloader --disabled
	autopart --type=plain --fstype=ext4 --nohome --noboot --noswap
	# Clear the Master Boot Record
	zerombr
	# Partition clearing information
	clearpart --all
	# Reboot after installation