r1 #42

	name: Multi node cluster with managed runners, Ubuntu, Kubespray

	on:
	push:
	# branches: [ main ]

	workflow_dispatch:

	env:
	num_nodes: 4

	jobs:
	define-matrix:
	runs-on: ubuntu-latest
	outputs:
	nodes: ${{ steps.nodes.outputs.nodes }}
	steps:
	- id: nodes
	run: \|
	nodes=$(python -c "print(list(range($num_nodes)))")
	echo nodes="$nodes" >>$GITHUB_OUTPUT

	control-node:
	runs-on: ubuntu-latest

	steps:
	- run: \|
	hostname -i >control-node-ip.txt
	ssh-keygen -q -b 2048 -t rsa -N '' -C 'cluster key' -f ~/.ssh/id_rsa
	cp ~/.ssh/id_rsa.pub ~/.ssh/authorized_keys
	cp ~/.ssh/id_rsa.pub .
	sudo iptables -P INPUT ACCEPT
	sudo iptables -P OUTPUT ACCEPT
	sudo iptables -P FORWARD ACCEPT
	sudo iptables -F

	- name: Upload control node data
	uses: actions/upload-artifact@v4
	with:
	name: control-node
	path: \|
	control-node-ip.txt
	id_rsa.pub

	- run: \|
	set -vx
	#ssh -o StrictHostKeyChecking=no $(hostname -i) echo hello
	ip addr

	sudo iptables -L -v -n
	ps -ef
	sleep 200


	nodes:
	needs: [define-matrix]
	runs-on: ubuntu-latest

	strategy:
	matrix:
	id: ${{ fromJSON(needs.define-matrix.outputs.nodes) }}

	steps:
	- run: \|
	sleep 60

	- uses: actions/download-artifact@v4
	with:
	name: control-node

	- run: \|
	set -vx
	echo ${{ matrix.id }}
	ip=$(cat control-node-ip.txt)

	mkdir .ssh
	chmod 700 .ssh
	chmod 600 id_rsa.pub
	mv id_rsa.pub .ssh/

	ip addr
	ssh -o StrictHostKeyChecking=no $ip echo hello

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