alicefr’s gists

alicefr / DRA - experimenting

Last active March 11, 2024 02:33

DRA - experimenting

	1. Create a k8s cluster with DRA enabled. We use latest minikube (v1.30.1) as at the moment of writing this, it is only one of the few providing already k8s 1.27
	```bash
	$ minikube start --driver=kvm2 --feature-gates=DynamicResourceAllocation=true \
	--kubernetes-version=v1.27.0-rc.0 \
	--extra-config=apiserver.runtime-config='resource.k8s.io/v1alpha2=true'
	```

	2. Example:
	```yaml
	apiVersion: resource.k8s.io/v1alpha2

alicefr / SCSI persistent reservation.md

Last active January 22, 2025 17:06

Create local scsi disk and test scsi persistent reservation

Tools installation

yum install targetcli sg3_utils

Create loopback scsi target

modprobe tcm_loop
mount -t configfs configfs /sys/kernel/config/

mkdir -p /disks

alicefr / vm-rhcos.yaml

Created March 8, 2022 13:50

Example of persistent installation with KubeVirt and RHCOS

alicefr / import-original-image.yaml

Last active January 19, 2022 08:59

Import VM disk image and modify it in the cluster in KubeVirt

	kubectl apply -f import-original-image.yaml
	# Wait until the DV import has finished. Now you have imported the original image on your k8s cluster
	# Modify the initial image with virt-customizee by using virtctl guestfs command. You can install additional packages or modify certain files
	$ virtctl guestfs pvc-with-cloud-init
	Use image: registry:5000/kubevirt/libguestfs-tools@sha256:4cfe1c07cc33999ed05bd43873b7a30b1b9127a4ae4922333e68a1bcd35169ce
	The PVC has been mounted at /disk
	If you don't see a command prompt, try pressing enter.
	$ ls /disk/
	disk.img
	virt-customize --run-command 'echo "My awesome image" > /tmp/hello' --install cloud-init -a /disk/disk.img

alicefr / Access disk remotely using nbd

Last active March 11, 2021 09:04

Access remote disk

	$ kubectl get pvc
	NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
	pvc-test Bound local-pv-25a396e8 34Gi RWO local 52m
	$ kubectl apply -f expose-pvc-nbd.yaml
	service/virt configured
	pod/virt configured
	# In another console
	$ kubectl port-forward pod/virt 8080:8080
	Handling connection for 8080

alicefr / kubectl-run-with-pvc.sh

Created March 5, 2021 15:35 — forked from yuanying/kubectl-run-with-pvc.sh

kubectl run with PVCs

	#!/bin/bash

	IMAGE="gcr.io/google-containers/ubuntu-slim:0.14"
	COMMAND="/bin/bash"
	SUFFIX=$(date +%s \| shasum \| base64 \| fold -w 10 \| head -1 \| tr '[:upper:]' '[:lower:]')

	usage_exit() {
	echo "Usage: $0 [-c command] [-i image] PVC ..." 1>&2
	exit 1
	}

alicefr / vm-fedora-xml

Created March 4, 2021 08:34

	<domain type='kvm' id='1'>
	<name>default_vm-fedora</name>
	<uuid>c9dc132f-1bb1-5f88-9891-deed35a6d803</uuid>
	<metadata>
	<kubevirt xmlns="http://kubevirt.io">
	<uid>990631c2-166a-401d-90e6-7a19b5fb2f18</uid>
	<graceperiod>
	<deletionGracePeriodSeconds>0</deletionGracePeriodSeconds>
	</graceperiod>
	</kubevirt>

Alice Frosi alicefr