Merge pull request #177406 from davidkna/podman-gen

nixos/virtualisation.oci-containers: follow podman-generated systemd units more closely

nixos/modules/virtualisation/oci-containers.nix

···
 
   mkService = name: container: let
     dependsOn = map (x: "${cfg.backend}-${x}.service") container.dependsOn;
+    escapedName = escapeShellArg name;
   in {
     wantedBy = [] ++ optional (container.autoStart) "multi-user.target";
     after = lib.optionals (cfg.backend == "docker") [ "docker.service" "docker.socket" ] ++ dependsOn;
···
       ${optionalString (container.imageFile != null) ''
         ${cfg.backend} load -i ${container.imageFile}
         ''}
+      ${optionalString (cfg.backend == "podman") ''
+        rm -f /run/podman-${escapedName}.ctr-id
+        ''}
       '';
 
     script = concatStringsSep " \\\n  " ([
       "exec ${cfg.backend} run"
       "--rm"
-      "--name=${escapeShellArg name}"
+      "--name=${escapedName}"
       "--log-driver=${container.log-driver}"
     ] ++ optional (container.entrypoint != null)
       "--entrypoint=${escapeShellArg container.entrypoint}"
-      ++ (mapAttrsToList (k: v: "-e ${escapeShellArg k}=${escapeShellArg v}") container.environment)
+      ++ lib.optionals (cfg.backend == "podman") [
+        "--cidfile=/run/podman-${escapedName}.ctr-id"
+        "--cgroups=no-conmon"
+        "--sdnotify=conmon"
+        "-d"
+        "--replace"
+      ] ++ (mapAttrsToList (k: v: "-e ${escapeShellArg k}=${escapeShellArg v}") container.environment)
       ++ map (f: "--env-file ${escapeShellArg f}") container.environmentFiles
       ++ map (p: "-p ${escapeShellArg p}") container.ports
       ++ optional (container.user != null) "-u ${escapeShellArg container.user}"
···
       ++ map escapeShellArg container.cmd
     );
 
-    preStop = "[ $SERVICE_RESULT = success ] || ${cfg.backend} stop ${name}";
-    postStop = "${cfg.backend} rm -f ${name} || true";
+    preStop = if cfg.backend == "podman"
+      then "[ $SERVICE_RESULT = success ] || podman stop --ignore --cidfile=/run/podman-${escapedName}.ctr-id"
+      else "[ $SERVICE_RESULT = success ] || ${cfg.backend} stop ${name}";
+    postStop =  if cfg.backend == "podman"
+      then "podman rm -f --ignore --cidfile=/run/podman-${escapedName}.ctr-id"
+      else "${cfg.backend} rm -f ${name} || true";
 
     serviceConfig = {
       ### There is no generalized way of supporting `reload` for docker
···
       # ExecReload = ...;
       ###
 
+      Environment=if cfg.backend == "podman" then "PODMAN_SYSTEMD_UNIT=podman-${name}.service" else {};
+      Type=if cfg.backend == "podman" then "notify" else {};
+      NotifyAccess=if cfg.backend == "podman" then "all" else {};
       TimeoutStartSec = 0;
       TimeoutStopSec = 120;
       Restart = "always";