Run k3s inside gitpod and deploy kube-prometheus.

Signed-off-by: ArthurSens <arthursens2005@gmail.com>

.gitpod/prepare-rootfs.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+
+set -euo pipefail
+
+img_url="https://cloud-images.ubuntu.com/hirsute/current/hirsute-server-cloudimg-amd64.tar.gz"
+
+script_dirname="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
+outdir="${script_dirname}/_output/rootfs"
+
+rm -Rf $outdir
+mkdir -p $outdir
+
+curl -L -o "${outdir}/rootfs.tar.gz" $img_url
+
+cd $outdir
+
+tar -xvf rootfs.tar.gz
+
+qemu-img resize hirsute-server-cloudimg-amd64.img +20G
+
+sudo virt-customize -a hirsute-server-cloudimg-amd64.img --run-command 'resize2fs /dev/sda'
+
+sudo virt-customize -a hirsute-server-cloudimg-amd64.img --root-password password:root
+
+netconf="
+network:
+  version: 2
+  renderer: networkd
+  ethernets:
+    enp0s3:
+      dhcp4: yes
+"
+
+# networking setup
+sudo virt-customize -a hirsute-server-cloudimg-amd64.img --run-command "echo '${netconf}' > /etc/netplan/01-net.yaml"
+
+# copy kernel modules
+sudo virt-customize -a hirsute-server-cloudimg-amd64.img --copy-in /lib/modules/$(uname -r):/lib/modules
+
+# ssh
+sudo virt-customize -a hirsute-server-cloudimg-amd64.img --run-command 'apt remove openssh-server -y && apt install openssh-server -y'
+sudo virt-customize -a hirsute-server-cloudimg-amd64.img --run-command "sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config"
+sudo virt-customize -a hirsute-server-cloudimg-amd64.img --run-command "sed -i 's/PasswordAuthentication no/PasswordAuthentication yes/' /etc/ssh/sshd_config"
+
+# mark as ready
+touch rootfs-ready.lock
+
+echo "k3s development environment is ready"