123 lines
3.4 KiB
Bash
123 lines
3.4 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 setup a nix-bitcoin node with krops.
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# The node is deployed to a minimal NixOS QEMU VM.
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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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# Run with option `--interactive` or `-i` to start a shell for interacting with
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# the node.
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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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cd "${BASH_SOURCE[0]%/*}"
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exec nix-shell --run "./${BASH_SOURCE[0]##*/} $*"
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fi
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source qemu-vm/run-vm.sh
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echo "Building the target VM"
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# Build the initial VM to which the nix-bitcoin node is deployed via krops
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nix-build --out-link $tmpDir/vm - <<'EOF'
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(import <nixpkgs/nixos> {
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configuration = { lib, ... }: {
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imports = [ <qemu-vm/vm-config.nix> ];
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services.openssh.enable = true;
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# Silence the following warning that appears when deploying via krops:
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# warning: Nix search path entry '/nix/var/nix/profiles/per-user/root/channels' does not exist, ignoring
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nix.nixPath = lib.mkForce [];
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};
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}).vm
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EOF
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vmNumCPUs=4
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vmMemoryMiB=2048
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sshPort=60734
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# Start the VM in the background
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runVM $tmpDir/vm $vmNumCPUs $vmMemoryMiB $sshPort
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# Build the krops deploy script
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export sshPort
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nix-build --out-link $tmpDir/krops-deploy - <<'EOF'
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let
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krops = (import <nix-bitcoin> {}).krops;
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extraSources = {
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# Skip uploading nixpkgs to the target node.
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# This works because /nix/store is shared with the target VM.
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nixpkgs.symlink = toString <nixpkgs>;
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nixos-config.file = toString <krops-vm-configuration.nix>;
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qemu-vm.file = toString <qemu-vm>;
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};
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in
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krops.pkgs.krops.writeCommand "krops-deploy" {
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source = import <krops/sources.nix> { inherit extraSources krops; };
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force = true;
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target = {
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user = "root";
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host = "127.0.0.1";
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port = builtins.getEnv "sshPort";
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extraOptions = [
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"-i" (toString <qemu-vm/id-vm>) "-oConnectTimeout=1"
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"-oStrictHostKeyChecking=no" "-oUserKnownHostsFile=/dev/null" "-oLogLevel=ERROR"
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"-oControlMaster=auto" "-oControlPath=${builtins.getEnv "tmpDir"}/ssh-connection" "-oControlPersist=60"
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];
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};
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# "test" instead of "switch" to avoid installing a bootloader which
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# is not possible in this VM
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command = targetPath: ''
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nixos-rebuild test -I /var/src
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'';
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}
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EOF
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echo "Building the nix-bitcoin node"
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# Pre-build the nix-bitcoin node outside of the VM to save some time
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nix-build --out-link $tmpDir/store-paths -E '
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let
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system = (import <nixpkgs/nixos> { configuration = <krops-vm-configuration.nix>; }).system;
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pkgsUnstable = (import <nix-bitcoin/pkgs/nixpkgs-pinned.nix>).nixpkgs-unstable;
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pkgs = import <nixpkgs> {};
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in
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pkgs.closureInfo { rootPaths = [ system pkgsUnstable ]; }
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' > /dev/null
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vmWaitForSSH
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# Add the store paths that include the nix-bitcoin node
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# to the nix store db in the VM
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c "nix-store --load-db < $(realpath $tmpDir/store-paths)/registration"
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echo
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echo "Deploy with krops"
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$tmpDir/krops-deploy
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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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case ${1:-} in
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-i|--interactive)
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. start-bash-session.sh
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;;
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esac
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# Cleanup happens at exit (defined in qemu-vm/run-vm.sh)
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