kubernetes-bootstrapping/00-provisioning/helpers.sh

#!/bin/bash

# Terraform?  We roll our own.

# Stop git bash being stupid
export MSYS_NO_PATHCONV=1

# Set your own
VBOXMANAGE="C:/Program Files/Oracle/VirtualBox/vboxmanage"
COREOSAPPLIANCEIMAGE="E:/VirtualBox/Images/fedora-coreos-39.20240128.3.0-virtualbox.x86_64.ova"

# Function to create VirtualBox VM, accepts name of VM as argument
create_vbox_vm() {
    if [ -z "$1" ] || [ -z "$2" ]; then
        echo "error: create_vm() called without specifying a VM name"
        echo "Usage: create_vm <name> <MAC Address>"
        echo "Example: create_vm kube_control01 \"08:00:27:00:00:01\""
        return
    fi

    "$VBOXMANAGE" import --vsys 0 --vmname "$1" $COREOSAPPLIANCEIMAGE
    "$VBOXMANAGE" modifyvm $1 --nic1 bridged
    "$VBOXMANAGE" modifyvm $1 --bridge-adapter1 "Intel(R) Ethernet Controller I225-V"
    "$VBOXMANAGE" modifyvm $1 --macaddress1 $2
    "$VBOXMANAGE" guestproperty set $1 "/Ignition/Config" "$(cat ignition/$1-boot.json)"
    "$VBOXMANAGE" startvm $1 --type headless
}

# Templating for Butane files to replace hostname with name passed 
# to lighter, then it calls butane to generate ignition files
# It's "lighter" than using jinja or some other bloat ;)
# This allows us to re-use the same butane YAML files for multiple hosts,
# we can substitute values with whatever we want.
lighter() {
    if [ -z "$1" ]; then
        echo "error: lighter() called without specifying a VM name"
        echo "Usage: lighter() <name>"
        return
    fi

    # Create temporary working copies 
    cp butane/boot.yaml butane/boot~.yaml
    cp butane/full.yaml butane/full~.yaml

    # Replace hostname token with name provided
    hostnameToken="{{HOSTNAME}}"
    sed -i -e "s/$hostnameToken/$1/g" butane/boot~.yaml
    sed -i -e "s/$hostnameToken/$1/g" butane/full~.yaml

    # Butane transpile to ignition files
    butane butane/boot~.yaml > ignition/$1-boot.json
    butane butane/full~.yaml > ignition/$1-full.json

    # Cleanup mess
    rm -f butane/*~.yaml
}