Nate Revo therevoman

In your local clone of your forked repository, you can add the original GitHub repository as a "remote". ("Remotes" are like nicknames for the URLs of repositories - origin is one, for example.) Then you can fetch all the branches from that upstream repository, and rebase your work to continue working on the upstream version. In terms of commands that might look like:

Add the remote, call it "upstream":

git remote add upstream https://github.com/whoever/whatever.git

Fetch all the branches of that remote into remote-tracking branches, such as upstream/master:

git fetch upstream

Simulate Bare-Metal IPMI for VMs in RHEL8 Libvirt

Install the Virtual BMC package in the machine to use as the vBMC server. Note1: When using OpenStack repos the python3-virtualbmc RPM might be available. These instrucctions do not use that package.
```
pip3 install virtualbmc
```
- The vBMC server can be running in any machine. When using a remote libvirt server it is recommended to have passwordless authentication from the vBMC server to the libvirt machines.
- For this document the vBMC Server export vBMCServerIP=192.168.1.13

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

# list nodes
oc get nodes

# list cluster operators and their state
oc get co

# show cluster version and error messages
oc get clusterversion

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:

NOTE: This is an unofficial procedure. Do NOT use this outside a lab environment. The official procedure is described in the official OCP documentation -- https://docs.openshift.com/container-platform/4.3/machine_management/adding-rhel-compute.html

copy kubeconfig to /root/.kube/config 
copy pull secret to /tmp/pull.json

export MC_NAME=`oc get machineconfigpool worker --output=jsonpath='{.status.configuration.name}'`

oc get machineconfig $MC_NAME --output=json &gt; /tmp/worker.json

Customizing RHEL8.1 qcow2 image

Need following packages:

yum -y install libguestfs-tools

Copy template image

export VMDISK="registry.qcow2"

cp /root/rhel-8.1-x86_64-kvm.qcow2 /var/lib/libvirt/images/pool/${VMDISK}

	cd /var/lib/rpm/
	mv __db.00* /tmp
	rpm --rebuilddb