treewide: deprecate ip-up.target (#18319)

Systemd upstream provides targets for networking. This also includes a target network-online.target.

In this PR I remove / replace most occurrences since some of them were even wrong and could delay startup.

nixos/modules/config/networking.nix

@@ -223,10 +223,10 @@ in
     # Install the proxy environment variables
     environment.sessionVariables = cfg.proxy.envVars;
 
-    # The ‘ip-up’ target is started when we have IP connectivity.  So
+    # The ‘ip-up’ target is kept for backwards compatibility.
-    # services that depend on IP connectivity (like ntpd) should be
+    # New services should use systemd upstream targets:
-    # pulled in by this target.
+    # See https://www.freedesktop.org/wiki/Software/systemd/NetworkTarget/
-    systemd.targets.ip-up.description = "Services Requiring IP Connectivity";
+    systemd.targets.ip-up.description = "Services Requiring IP Connectivity (deprecated)";
 
     # This is needed when /etc/resolv.conf is being overriden by networkd
     # and other configurations. If the file is destroyed by an environment

nixos/modules/services/databases/4store-endpoint.nix

@@ -61,7 +61,9 @@ with lib;
     services.avahi.enable = true;
 
     systemd.services."4store-endpoint" = {
-      wantedBy = [ "ip-up.target" ];
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+
       script = ''
         ${run} '${pkgs.rdf4store}/bin/4s-httpd -D ${cfg.options} ${if cfg.listenAddress!=null then "-H ${cfg.listenAddress}" else "" } -p ${toString cfg.port} ${cfg.database}'
       '';

nixos/modules/services/databases/4store.nix

@@ -53,7 +53,8 @@ with lib;
     services.avahi.enable = true;
 
     systemd.services."4store" = {
-      wantedBy = [ "ip-up.target" ];
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
 
       preStart = ''
         mkdir -p ${stateDir}/

nixos/modules/services/databases/virtuoso.nix

@@ -62,7 +62,8 @@ with lib;
       };
 
     systemd.services.virtuoso = {
-      wantedBy = [ "ip-up.target" ];
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
 
       preStart = ''
         mkdir -p ${stateDir}

nixos/modules/services/mail/freepops.nix

@@ -74,7 +74,8 @@ in
   config = mkIf cfg.enable {
     systemd.services.freepopsd = {
       description = "Freepopsd (webmail over POP3)";
-      wantedBy = [ "ip-up.target" ];
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
       script = ''
         ${pkgs.freepops}/bin/freepopsd \
           -p ${toString cfg.port} \

nixos/modules/services/monitoring/ups.nix

@@ -182,7 +182,8 @@ in
 
     systemd.services.upsmon = {
       description = "Uninterruptible Power Supplies (Monitor)";
-      wantedBy = [ "ip-up.target" ];
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
       serviceConfig.Type = "forking";
       script = "${pkgs.nut}/sbin/upsmon";
       environment.NUT_CONFPATH = "/etc/nut/";
@@ -191,8 +192,8 @@ in
 
     systemd.services.upsd = {
       description = "Uninterruptible Power Supplies (Daemon)";
+      after = [ "network.target" "upsmon.service" ];
       wantedBy = [ "multi-user.target" ];
-      after = [ "network-interfaces.target" "upsmon.service" ];
       serviceConfig.Type = "forking";
       # TODO: replace 'root' by another username.
       script = "${pkgs.nut}/sbin/upsd -u root";
@@ -202,8 +203,8 @@ in
 
     systemd.services.upsdrv = {
       description = "Uninterruptible Power Supplies (Register all UPS)";
-      wantedBy = [ "multi-user.target" ];
       after = [ "upsd.service" ];
+      wantedBy = [ "multi-user.target" ];
       # TODO: replace 'root' by another username.
       script = ''${pkgs.nut}/bin/upsdrvctl -u root start'';
       serviceConfig = {

nixos/modules/services/network-filesystems/drbd.nix

@@ -53,9 +53,9 @@ let cfg = config.services.drbd; in
       };
 
     systemd.services.drbd = {
-      after = [ "systemd-udev.settle.service" ];
+      after = [ "systemd-udev.settle.service" "network.target" ];
       wants = [ "systemd-udev.settle.service" ];
-      wantedBy = [ "ip-up.target" ];
+      wantedBy = [ "multi-user.target" ];
       script = ''
         ${pkgs.drbd}/sbin/drbdadm up all
       '';

nixos/modules/services/networking/amuled.nix

@@ -59,7 +59,8 @@ in
 
     systemd.services.amuled = {
       description = "AMule daemon";
-      wantedBy = [ "ip-up.target" ];
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
 
       preStart = ''
         mkdir -p ${cfg.dataDir}

nixos/modules/services/networking/dhcpcd.nix

@@ -61,7 +61,6 @@ let
       ${cfg.extraConfig}
     '';
 
-  # Hook for emitting ip-up/ip-down events.
   exitHook = pkgs.writeText "dhcpcd.exit-hook"
     ''
       if [ "$reason" = BOUND -o "$reason" = REBOOT ]; then
@@ -73,14 +72,8 @@ let
           # applies to openntpd.
           ${config.systemd.package}/bin/systemctl try-restart ntpd.service
           ${config.systemd.package}/bin/systemctl try-restart openntpd.service
-
-          ${config.systemd.package}/bin/systemctl start ip-up.target
       fi
 
-      #if [ "$reason" = EXPIRE -o "$reason" = RELEASE -o "$reason" = NOCARRIER ] ; then
-      #    ${config.systemd.package}/bin/systemctl start ip-down.target
-      #fi
-
       ${cfg.runHook}
     '';
 

nixos/modules/services/networking/git-daemon.nix

@@ -116,7 +116,8 @@ in
       };
 
     systemd.services."git-daemon" = {
-      wantedBy = [ "ip-up.target" ];
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
       script = "${pkgs.git}/bin/git daemon --reuseaddr "
         + (optionalString (cfg.basePath != "") "--base-path=${cfg.basePath} ")
         + (optionalString (cfg.listenAddress != "") "--listen=${cfg.listenAddress} ")

nixos/modules/services/networking/iodine.nix

@@ -106,7 +106,8 @@ in
       createIodineClientService = name: cfg:
       {
         description = "iodine client - ${name}";
-        wantedBy = [ "ip-up.target" ];
+        after = [ "network.target" ];
+        wantedBy = [ "multi-user.target" ];
         serviceConfig = {
           RestartSec = "30s";
           Restart = "always";
@@ -121,7 +122,8 @@ in
     ) // {
       iodined = mkIf (cfg.server.enable) {
         description = "iodine, ip over dns server daemon";
-        wantedBy = [ "ip-up.target" ];
+        after = [ "network.target" ];
+        wantedBy = [ "multi-user.target" ];
         serviceConfig.ExecStart = "${pkgs.iodine}/bin/iodined -f -u ${iodinedUser} ${cfg.server.extraConfig} ${cfg.server.ip} ${cfg.server.domain}";
       };
     };

nixos/modules/services/networking/networkmanager.nix

@@ -55,7 +55,6 @@ let
   ipUpScript = writeScript "01nixos-ip-up" ''
     #!/bin/sh
     if test "$2" = "up"; then
-      ${config.systemd.package}/bin/systemctl start ip-up.target
       ${config.systemd.package}/bin/systemctl start network-online.target
     fi
   '';

nixos/modules/system/boot/networkd.nix

@@ -677,8 +677,7 @@ in
     };
 
     systemd.services.systemd-networkd-wait-online = {
-      before = [ "ip-up.target" ];
+      wantedBy = [ "network-online.target" ];
-      wantedBy = [ "network-online.target" "ip-up.target" ];
     };
 
     systemd.services."systemd-network-wait-online@" = {

nixos/modules/tasks/network-interfaces-scripted.nix

@@ -142,7 +142,7 @@ in
                     # (Flushing this interface may have removed it.)
                     ${config.systemd.package}/bin/systemctl try-restart --no-block network-setup.service
                   fi
-                  ${config.systemd.package}/bin/systemctl start ip-up.target
+                  ${config.systemd.package}/bin/systemctl start network-online.target
                 '';
             preStop = flip concatMapStrings (ips) (ip:
                 let

nixos/modules/virtualisation/azure-agent.nix

@@ -178,7 +178,8 @@ in
 
     systemd.services.waagent = {
       wantedBy = [ "multi-user.target" ];
-      after = [ "ip-up.target" "sshd.service" ];
+      after = [ "network-online.target" "sshd.service" ];
+      wants = [ "network-online.target" ];
 
       path = [ pkgs.e2fsprogs ];
       description = "Windows Azure Agent Service";

nixos/modules/virtualisation/brightbox-image.nix

@@ -116,8 +116,8 @@ in
 
       wantedBy = [ "multi-user.target" "sshd.service" ];
       before = [ "sshd.service" ];
-      wants = [ "ip-up.target" ];
+      wants = [ "network-online.target" ];
-      after = [ "ip-up.target" ];
+      after = [ "network-online.target" ];
 
       path = [ pkgs.wget pkgs.iproute ];
 

nixos/modules/virtualisation/google-compute-image.nix

@@ -134,8 +134,8 @@ in
 
       wantedBy = [ "sshd.service" ];
       before = [ "sshd.service" ];
-      after = [ "network-online.target" "ip-up.target" ];
+      after = [ "network-online.target" ];
-      wants = [ "network-online.target" "ip-up.target" ];
+      wants = [ "network-online.target" ];
 
       script = let wget = "${pkgs.wget}/bin/wget --retry-connrefused -t 15 --waitretry=10 --header='Metadata-Flavor: Google'";
                    mktemp = "mktemp --tmpdir=/run"; in