From 84f607d7cf8221fb4876bd57958503e5c3a6b366 Mon Sep 17 00:00:00 2001
From: Luke Granger-Brown <hg@lukegb.com>
Date: Sat, 9 May 2020 18:53:17 +0100
Subject: [PATCH] *: try setting up automated deploys

This won't work yet, since the deployer user isn't correctly configured,
but this should at least trigger the right sets of things to happen.
---
 .gitlab-ci.yml                 | 17 ++++++++++++
 hack/deploy.sh                 | 19 +++++++++++++
 ops/nixos/marukuru/default.nix | 50 ++++++++++++++++++++++++++++++++++
 3 files changed, 86 insertions(+)
 create mode 100755 hack/deploy.sh

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0587e9be6d..0109bba679 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,5 +1,6 @@
 stages:
   - build
+  - deploy
 
 nixCache:
   stage: build
@@ -9,3 +10,19 @@ nixCache:
     - "cp ${OPS_SECRETS_DEFAULT_NIX} ops/secrets/default.nix"
     - "nix build -v -f ./ci-root.nix --substituters \"https://cache.nixos.org s3://lukegb-nix-cache?endpoint=storage.googleapis.com&trusted=1\""
     - "nix copy -v --to 's3://lukegb-nix-cache?endpoint=storage.googleapis.com' ./result"
+
+.deploy:
+  stage: deploy
+  rules:
+    - if: '$CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH'
+  variables:
+    SSH_ARGS: ''
+  script: './hack/deploy.sh "$DEPLOY_TO" "$SSH_ARGS"'
+  tags:
+    - deployer
+
+ixvm-fra01:
+  extends: .deploy
+  variables:
+    # TODO(lukegb): DNS...
+    DEPLOY_TO: "141.98.136.124"
diff --git a/hack/deploy.sh b/hack/deploy.sh
new file mode 100755
index 0000000000..8951a08cfa
--- /dev/null
+++ b/hack/deploy.sh
@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+echo Dropping files into place as defined by manifest...
+while read -r manifest_line; do
+  IFS='=' read -ra manifest_bits <<< "$manifest_line"
+  if [[ "${#manifest_bits[@]}" -ne 2 ]]; then continue; fi
+  echo -e "\t${manifest_bits[1]}"
+  cp "${!manifest_bits[0]}" "${manifest_bits[1]}"
+done <<< "$SECRETS_MANIFEST"
+
+if [ -z ${2+x} ]; then ssh_cmd="ssh"; else ssh_cmd="ssh $2"; fi
+
+echo Syncing repo content to machine "$1"
+rsync -e "$ssh_cmd" -avz --exclude='.hg/' ./ "deployer@$1:depot/"
+
+echo Triggering rebuild
+$ssh_cmd -t "deployer@$1" rebuilder depot/
diff --git a/ops/nixos/marukuru/default.nix b/ops/nixos/marukuru/default.nix
index 1e2c7bab54..2590be0804 100644
--- a/ops/nixos/marukuru/default.nix
+++ b/ops/nixos/marukuru/default.nix
@@ -142,5 +142,55 @@ in {
     };
   };
 
+  # Container networking.
+  networking.nat = {
+    enable = true;
+    internalInterfaces = [ "ve-+" ];
+    externalInterface = "eth0";
+  };
+  networking.networkmanager.unmanaged = [ "interface-name:ve-*" ];
+
+  containers.deployer = {
+    config = { config, pkgs, ... }: {
+      environment.etc."secrets/gitlab-runner-registration" = {
+        text = ''
+          CI_SERVER_URL=https://hg.lukegb.com
+          REGISTRATION_TOKEN=${depot.ops.secrets.deployer.registrationToken}
+        '';
+        mode = "0600";
+      };
+      services.gitlab-runner = {
+        enable = true;
+        concurrent = 4;
+        services = {
+          deployer = {
+            registrationConfigFile = "/etc/secrets/gitlab-runner-registration";
+            executor = "shell";
+            tagList = [ "deployer" ];
+          };
+        };
+        gracefulTermination = true;
+        gracefulTimeout = "4min";
+        package = depot.nix.pkgs.heptapod-runner;
+      };
+      users.users.gitlab-runner = {
+        createHome = true;
+        home = "/srv/gitlab-runner";
+      };
+      system.activationScripts.deployer-key = lib.stringAfter [ "users" "groups" ] ''
+        mkdir -p /srv/gitlab-runner/.ssh
+        chown -R gitlab-runner:nogroup /srv/gitlab-runner/.ssh
+        chmod -R u=rwX,go= /srv/gitlab-runner/.ssh
+        cp "${pkgs.writeTextFile {
+          name = "gitlab-runner-key";
+          destination = "/private/id_ed25519";
+          text = depot.ops.secrets.deployer.privateKey;
+        }}/private/id_ed25519" /srv/gitlab-runner/.ssh/id_ed25519
+        chown -R gitlab-runner:nogroup /srv/gitlab-runner/.ssh
+        chmod -R u=rwX,go= /srv/gitlab-runner/.ssh
+      '';
+    };
+  };
+
   system.stateVersion = "20.03";
 }