drone: initial attempt at configuring it

1 files changed, 54 insertions, 0 deletions

diff --git a/modules/services/drone/runner-exec/default.nix b/modules/services/drone/runner-exec/default.nix
new file mode 100644
index 0000000..f2b2a0f
--- /dev/null
+++ b/modules/services/drone/runner-exec/default.nix
@@ -0,0 +1,54 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.my.services.drone;
+  hasRunner = (name: builtins.elem name cfg.runners);
+  execPkg = pkgs.drone-runner-exec;
+in {
+  config = lib.mkIf (cfg.enable && hasRunner "exec") {
+    systemd.services.drone-runner-exec = {
+      wantedBy = [ "multi-user.target" ];
+      # might break deployment
+      restartIfChanged = false;
+      confinement.enable = true;
+      confinement.packages = with pkgs; [ git gnutar bash nixUnstable gzip ];
+      path = with pkgs; [ git gnutar bash nixUnstable gzip ];
+      serviceConfig = {
+        Environment = [
+          "DRONE_SERVER_HOST=${cfg.vhostName}"
+          "DRONE_SERVER_PROTO=https"
+          "DRONE_RUNNER_CAPACITY=10"
+          "CLIENT_DRONE_RPC_HOST=127.0.0.1:${toString cfg.port}"
+          "NIX_REMOTE=daemon"
+          "PAGER=cat"
+        ];
+        BindPaths = [ "/nix/var/nix/daemon-socket/socket" "/run/nscd/socket" ];
+        BindReadOnlyPaths = [
+          "/etc/resolv.conf:/etc/resolv.conf"
+          "/etc/resolvconf.conf:/etc/resolvconf.conf"
+          "/etc/passwd:/etc/passwd"
+          "/etc/group:/etc/group"
+          "/nix/var/nix/profiles/system/etc/nix:/etc/nix"
+          "${
+            config.environment.etc."ssl/certs/ca-certificates.crt".source
+          }:/etc/ssl/certs/ca-certificates.crt"
+          "${
+            config.environment.etc."ssh/ssh_known_hosts".source
+          }:/etc/ssh/ssh_known_hosts"
+          "/etc/machine-id"
+          # channels are dynamic paths in the nix store, therefore we need to bind mount the whole thing
+          "/nix/"
+        ];
+        EnvironmentFile = [ cfg.sharedSecretFile ];
+        ExecStart = "${execPkg}/bin/drone-runner-exec";
+        User = "drone-runner-exec";
+        Group = "drone-runner-exec";
+      };
+    };
+
+    users.users.drone-runner-exec = {
+      isSystemUser = true;
+      group = "drone-runner-exec";
+    };
+    users.groups.drone-runner-exec = { };
+  };
+}