Remove nixops examples and documentation

examples/README.md

@@ -20,10 +20,6 @@ By default, [`configuration.nix`](configuration.nix) enables `bitcoind` and `cli
 - [`./deploy-qemu-vm.sh`](deploy-qemu-vm.sh) creates a QEMU VM.\
   Requires: [Nix](https://nixos.org/nix/)
 
-- [`./deploy-nixops.sh`](deploy-nixops.sh) creates a VirtualBox VM via [NixOps](https://github.com/NixOS/nixops).\
-  NixOps can be used to deploy to various other backends like cloud providers.\
-  Requires: [Nix](https://nixos.org/nix/), [VirtualBox](https://www.virtualbox.org)
-
 - [`./deploy-container-minimal.sh`](deploy-container-minimal.sh) creates a
   container defined by [minimal-configuration.nix](minimal-configuration.nix) that
   doesn't use the [secure-node.nix](../modules/presets/secure-node.nix) preset.

examples/configuration.nix

@@ -13,7 +13,6 @@
 
     # FIXME: Uncomment next line to import your hardware configuration. If so,
     # add the hardware configuration file to the same directory as this file.
-    # This is not needed when deploying to a virtual box.
     #./hardware-configuration.nix
   ];
   # FIXME: Enable modules by uncommenting their respective line. Disable
@@ -73,10 +72,10 @@
   # If you use lnd, you should manually backup your wallet mnemonic
   # seed. This will allow you to recover on-chain funds. You can run the
   # following command after the lnd service starts:
-  # nixops scp --from bitcoin-node /secrets/lnd-seed-mnemonic ./secrets/lnd-seed-mnemonic
+  # scp bitcoin-node:/secrets/lnd-seed-mnemonic ./secrets/lnd-seed-mnemonic
   # You should also backup your channel state after opening new channels.
   # This will allow you to recover off-chain funds, by force-closing channels.
-  # nixops scp --from bitcoin-node /var/lib/lnd/chain/bitcoin/mainnet/channel.backup /my-backup-path/channel.backup
+  # scp bitcoin-node:/var/lib/lnd/chain/bitcoin/mainnet/channel.backup /my-backup-path/channel.backup
 
   ### SPARK WALLET
   # Enable this module to use spark-wallet, a minimalistic wallet GUI for
@@ -176,7 +175,7 @@
   # /var/lib/localBackups once a day.
   # services.backups.enable = true;
   # You can pull the localBackups folder with
-  # `nixops scp --from bitcoin-node /var/lib/localBackups /my-backup-path/`
+  # `scp bitcoin-node:/var/lib/localBackups /my-backup-path/`
   # Alternatively, you can also set a remote target url, for example
   # services.backups.destination = "sftp://user@host[:port]/[relative|/absolute]_path";
   # Supply the sftp password by appending the FTP_PASSWORD environment variable

examples/deploy-nixops.sh

@@ -1,50 +0,0 @@
-#!/usr/bin/env bash
-set -euo pipefail
-
-# This script demonstrates how to setup a VirtualBox nix-bitcoin node with nixops.
-# Running this script leaves no traces on your host system.
-
-# This demo is a template for your own experiments.
-# Run with option `--interactive` or `-i` to start a shell for interacting with
-# the node.
-
-if [[ ! -v IN_NIX_SHELL ]]; then
-    echo "Running script in nix shell env..."
-    cd "${BASH_SOURCE[0]%/*}"
-    exec nix-shell --run "./${BASH_SOURCE[0]##*/} $*"
-fi
-
-# Cleanup on exit
-cleanup() {
-    set +e
-    if nixops list | grep -q bitcoin-node; then
-        nixops destroy --confirm -d bitcoin-node
-    fi
-    rm -rf $tmpDir
-}
-trap "cleanup" EXIT
-
-tmpDir=/tmp/nix-bitcoin-nixops
-mkdir -p $tmpDir
-
-# Don't write nixops and VirtualBox data to the $USER's home
-export HOME=$tmpDir
-
-# Disable interactive queries and don't write to the $USER's known_hosts file
-export NIXOPS_SSH_OPTS="-o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null"
-
-nixops create nixops/node.nix nixops/node-vbox.nix -d bitcoin-node
-nixops deploy -d bitcoin-node
-
-# Connect to node
-nixops ssh bitcoin-node systemctl status bitcoind
-
-c() { nixops ssh bitcoin-node "$@"; }
-
-case ${1:-} in
-    -i|--interactive)
-        . start-bash-session.sh
-        ;;
-esac
-
-# Cleanup happens at exit (see above)

examples/nixops/node-libvirtd.nix

@@ -1,30 +0,0 @@
-{
-  bitcoin-node =
-    { config, pkgs, ... }:
-    {
-      deployment.targetEnv = "libvirtd";
-      deployment.libvirtd.memorySize = 8192; # megabytes
-      deployment.libvirtd.vcpu = 4; # number of cpus
-      deployment.libvirtd.headless = true;
-      deployment.libvirtd.baseImageSize = 400;
-      boot.kernelParams = [ "console=ttyS0,115200" ];
-      deployment.libvirtd.extraDevicesXML = ''
-        <serial type='pty'>
-          <target port='0'/>
-       </serial>
-        <console type='pty'>
-          <target type='serial' port='0'/>
-       </console>
-      '';
-      # Remove when fixed: https://github.com/NixOS/nixops/issues/931
-      system.activationScripts.nixops-vm-fix-931 = {
-        text = ''
-          if ls -l /nix/store | grep sudo | grep -q nogroup; then
-            mount -o remount,rw  /nix/store
-            chown -R root:nixbld /nix/store
-          fi
-        '';
-        deps = [];
-      };
-    };
-}

examples/nixops/node-vbox.nix

@@ -1,13 +0,0 @@
-{
-  bitcoin-node =
-    { config, pkgs, ... }:
-    {
-      deployment.targetEnv = "virtualbox";
-      deployment.virtualbox = {
-        memorySize = 4096; # megabytes
-        vcpu = 4; # number of cpus
-        disks.disk1.size = 358400; # 350 GiB
-        headless = true;
-      };
-    };
-}

examples/nixops/node.nix

@@ -1,5 +1,8 @@
+# This is an example network definition for deploying a nix-bitcoin node via NixOps.
+# NixOps deployment is currently untested.
+
 {
-  network.description = "Bitcoin Core node";
+  network.description = "Bitcoin node";
 
   bitcoin-node = { config, pkgs, lib, ... }: {
     imports = [
@@ -8,5 +11,9 @@
     ];
 
     nix-bitcoin.deployment.secretsDir = toString ../secrets;
+
+    #FIXME:
+    # Set `deployment.*` options like
+    # deployment.targetHost = "<address_or_hostname>";
   };
 }

examples/shell.nix

@@ -20,7 +20,7 @@ with nixpkgs;
 stdenv.mkDerivation rec {
   name = "nix-bitcoin-environment";
 
-  path = lib.makeBinPath [ nix-bitcoin.nixops19_09 nix-bitcoin.extra-container figlet ];
+  path = lib.makeBinPath [ nix-bitcoin.extra-container figlet ];
 
   shellHook = ''
     export NIX_PATH="nixpkgs=${nixpkgs-path}:nix-bitcoin=${toString nix-bitcoin-path}:."
@@ -28,12 +28,6 @@ stdenv.mkDerivation rec {
 
     alias fetch-release="${toString nix-bitcoin-path}/helper/fetch-release"
 
-    # ssh-agent and nixops don't play well together (see
-    # https://github.com/NixOS/nixops/issues/256). I'm getting `Received disconnect
-    # from 10.1.1.200 port 22:2: Too many authentication failures` if I have a few
-    # keys already added to my ssh-agent.
-    export SSH_AUTH_SOCK=""
-
     figlet "nix-bitcoin"
     (mkdir -p secrets; cd secrets; env -i ${nix-bitcoin.generate-secrets})