94 lines
2.2 KiB
Bash
94 lines
2.2 KiB
Bash
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#!/usr/bin/env bash
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set -euo pipefail
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# This script demonstrates how to run a nix-bitcoin node in QEMU.
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# Running this script leaves no traces on your host system.
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# This demo is a template for your own experiments.
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# Feel free to modify or to run nix-shell and execute individual statements of this
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# script in the interactive shell.
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# MAKE SURE TO REPLACE the SSH identity file if you use this script for
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# anything serious.
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if [[ ! -v IN_NIX_SHELL ]]; then
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echo "Running script in nix shell env..."
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exec nix-shell --run "${BASH_SOURCE[0]}"
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fi
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tmpDir=/tmp/nix-bitcoin-qemu-vm
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mkdir -p $tmpDir
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# Cleanup on exit
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cleanup() {
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set +eu
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kill -9 $qemuPID
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rm -rf $tmpDir
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}
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trap "cleanup" EXIT
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identityFile=qemu-vm/id-vm
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chmod 0600 $identityFile
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echo "Building VM"
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nix-build --out-link $tmpDir/vm - <<EOF
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(import <nixpkgs/nixos> {
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configuration = {
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imports = [
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<nix-bitcoin/examples/configuration.nix>
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<nix-bitcoin/modules/secrets/generate-secrets.nix>
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];
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virtualisation.graphics = false;
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services.mingetty.autologinUser = "root";
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users.users.root = {
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openssh.authorizedKeys.keys = [ "$(cat $identityFile.pub)" ];
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};
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};
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}).vm
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EOF
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vmMemoryMiB=2048
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vmNumCPUs=4
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sshPort=60734
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export NIX_DISK_IMAGE=$tmpDir/img
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export QEMU_NET_OPTS=hostfwd=tcp::$sshPort-:22
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</dev/null $tmpDir/vm/bin/run-*-vm -m $vmMemoryMiB -smp $vmNumCPUs &>/dev/null &
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qemuPID=$!
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# Run command in VM
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c() {
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ssh -p $sshPort -i $identityFile -o ConnectTimeout=1 \
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-o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR \
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-o ControlMaster=auto -o ControlPath=$tmpDir/ssh-connection -o ControlPersist=60 \
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root@127.0.0.1 "$@"
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}
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echo
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echo "Waiting for SSH connection..."
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while ! c : 2>/dev/null; do :; done
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echo
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echo "Waiting until services are ready..."
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c '
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attempts=300
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while ! systemctl is-active clightning &> /dev/null; do
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((attempts-- == 0)) && { echo "timeout"; exit 1; }
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sleep 0.2
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done
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'
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echo
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echo "Bitcoind service:"
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c systemctl status bitcoind
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echo
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echo "Bitcoind network:"
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c bitcoin-cli getnetworkinfo
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echo
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echo "lightning-cli state:"
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c lightning-cli getinfo
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echo
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echo "Node info:"
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c nodeinfo
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# Cleanup happens at exit (see above)
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