FIX #856 Add documentation for daemonUser/Group settings

src/main/scala/com/typesafe/sbt/packager/linux/LinuxPlugin.scala

@@ -60,9 +60,11 @@ object LinuxPlugin extends AutoPlugin {
     name in Linux := name.value,
     packageName in Linux := packageName.value,
     executableScriptName in Linux := executableScriptName.value,
-    daemonUser in Linux := (packageName in Linux).value,
+    daemonUser := (packageName in Linux).value,
+    daemonUser in Linux := daemonUser.value,
     daemonUserUid in Linux := None,
-    daemonGroup in Linux := (daemonUser in Linux).value,
+    daemonGroup := (daemonUser in Linux).value,
+    daemonGroup in Linux := daemonGroup.value,
     daemonGroupGid in Linux := None,
     daemonShell in Linux := "/bin/false",
     defaultLinuxInstallLocation := "/usr/share",

src/sphinx/archetypes/java_server/customize.rst

@@ -54,6 +54,21 @@ Example `/etc/default/<normalizedName>` for SystemV:
     COMPANY_API_KEY=123abc
     export COMPANY_API_KEY
 
+Daemon User and Group
+~~~~~~~~~~~~~~~~~~~~~
+
+Customize the daemon user and group for your application with the following settings.
+
+.. code-block:: scala
+
+    // a different daemon user
+    daemonUser in Linux := "my-user"
+    // if there is an existing one you can specify the uid
+    daemonUserUid in Linux := Some("123")
+    // a different daemon group
+    daemonGroup in Linux := "my-group"
+    // if the group already exists you can specify the uid
+    daemonGroupGid in Linux := Some("1001")
 
 Environment variables
 ~~~~~~~~~~~~~~~~~~~~~
@@ -225,6 +240,13 @@ Linux Replacements
       ${{daemon_user}}
       ${{daemon_group}}
 
+.. attention::
+    Every replacement corresponds to a single setting or task. For the `linuxScriptReplacements` you need
+    to override the setting/task in the `in Linux` scope. For example
+
+    ``daemonUser in Linux := "new-user"``
+
+    overrides the ``daemon_user`` in the linuxScriptReplacements.
 
 Example Configurations
 ======================

src/sphinx/archetypes/java_server/index.rst

@@ -46,7 +46,7 @@ have sensible defaults.
     UID of daemonUser
 
   ``daemonGroup``
-    Group to place daemonUser to.
+    Group to place daemonUser to
 
   ``daemonGroupGid``
     GID of daemonGroup

src/sphinx/archetypes/systemloaders.rst

@@ -49,9 +49,6 @@ General Settings
   ``retryTimeout``
     Timeout between retries in seconds
 
-  ``fileDescriptorLimit``
-    Maximum number of open file descriptors for the spawned application. The default value is 1024.
-
 
 SystemV
 -------

src/sphinx/formats/docker.rst

@@ -258,7 +258,7 @@ Since ``dockerCommands`` is just a ``Sequence``, adding commands is straightforw
   import com.typesafe.sbt.packager.docker._
 
   // use += to add an item to a Sequence
-  dockerCommands += Cmd("USER", daemonUser.value)
+  dockerCommands += Cmd("USER", (daemonUser in Docker).value)
 
   // use ++= to merge a sequence with an existing sequence
   dockerCommands ++= Seq(

src/sphinx/formats/linux.rst

@@ -82,6 +82,10 @@ The required fields for any linux distribution are:
   ``linuxPackageMappings``
     A list of files and their desired installation locations for the package, as well as other metainformation.
 
+  ``fileDescriptorLimit``
+    Maximum number of open file descriptors for the spawned application. The default value is 1024.
+
+
 
 Customize
 ---------