nixos/home/routing-common: Add ping test to keepalived

lib/constants.nix

@@ -11,6 +11,7 @@ rec {
       jellyseerr = 402;
       atticd = 403;
       kea = 404;
+      keepalived_script = 405;
     };
     gids = {
       matrix-syncv3 = 400;
@@ -18,6 +19,7 @@ rec {
       jellyseerr = 402;
       atticd = 403;
       kea = 404;
+      keepalived_script = 405;
     };
   };
 

nixos/boxes/home/routing-common/keepalived.nix

@@ -5,36 +5,59 @@ let
   inherit (lib.my) net;
   inherit (lib.my.c.home) prefixes vips;
 
+  pingScriptFor = ip: {
+    script = "${pkgs.iputils}/bin/ping -qnc 1 ${ip}";
+    interval = 1;
+    timeout = 1;
+    rise = 3;
+    fall = 3;
+  };
+
   vlanIface = vlan: if vlan == "as211024" then vlan else "lan-${vlan}";
-  vrrpIPs = family: concatMap (vlan: [
+  vrrpIPs = family: concatMap (vlan: (optional (family == "v6") {
+      addr = "fe80::1/64";
+      dev = vlanIface vlan;
+    }) ++ [
     {
       addr = "${vips.${vlan}.${family}}/${toString (net.cidr.length prefixes.${vlan}.${family})}";
       dev = vlanIface vlan;
     }
-  ] ++ (optional (family == "v6") {
+  ]) (attrNames vips);
-    addr = "fe80::1/64";
-    dev = vlanIface vlan;
-  })) (attrNames vips);
   mkVRRP = family: routerId: {
     state = if index == 0 then "MASTER" else "BACKUP";
     interface = "lan-core";
     priority = 255 - index;
     virtualRouterId = routerId;
     virtualIps = vrrpIPs family;
+    trackScripts = [ "${family}Alive" ];
     extraConfig = ''
-      notify_master "${config.systemd.package}/bin/systemctl start radvd.service"
+      notify_master "${config.systemd.package}/bin/systemctl start radvd.service" root
-      notify_backup "${config.systemd.package}/bin/systemctl stop radvd.service"
+      notify_backup "${config.systemd.package}/bin/systemctl stop radvd.service" root
     '';
   };
 in
 {
+  users = with lib.my.c.ids; {
+    users.keepalived_script = {
+      uid = uids.keepalived_script;
+      isSystemUser = true;
+      group = "keepalived_script";
+    };
+    groups.keepalived_script.gid = gids.keepalived_script;
+  };
+
   services = {
     keepalived = {
       enable = true;
+      enableScriptSecurity = true;
       extraGlobalDefs = ''
         vrrp_version 3
         nftables keepalived
       '';
+      vrrpScripts = {
+        v4Alive = pingScriptFor "1.1.1.1";
+        v6Alive = pingScriptFor "2600::";
+      };
       vrrpInstances = {
         v4 = mkVRRP "v4" 51;
         v6 = mkVRRP "v6" 52;