Server Descriptor

A server represents an Ice server deployed on a node as part of an application. IceGrid supports three kinds of servers:

• Plain Server
  A normal Ice server, with typically a single Ice communicator. IceGrid generates a single Ice configuration file for this server.

• IceBox Server
  An IceBox server, with usually a number of IceBox services deployed in it. IceGrid generates an Ice configuration file for the IceBox server itself, and also a separate Ice configuration for each IceBox service.

• Server Instance
  A server (either plain server or IceBox server) defined using a server template.

Plain Server

Properties

The Server Properties panel offers the following fields:

• Server ID
  The ID of the server; corresponds to the Ice.Admin.ServerId property.  Each server must have a unique ID within an IceGrid deployment.

• Description
  A free-text description of this server.

• Property Sets
  List of property-set IDs; you refer to a property set to "include" all its properties in the server.

• Properties
  Ice properties private to this server.

• Log Files
  This table can be used to declare a number of log files used by this server. Path is the path to the log file (a relative path is relative to the IceGrid node working directory); when Property is set, IceGrid generates a property with this name and the log file path as value.
  You declare log files to be able to conveniently retrieve them using IceGrid GUI (in the Live Deployment tab) or with the icegridadmin command-line utility.

• Path to Executable
  Path to the server's executable; cannot be blank. A relative path is relative to the IceGrid node working directory.

• Ice Version
  The Ice version of this server. If you don't provide a value, IceGrid assumes it's the same version as the IceGrid registry.

• Working Directory
  The working directory for the server when started by the IceGrid node.

• Command Arguments
  The command-line arguments given to the server when started by the IceGrid node.

• Run as
  On Linux and Unix, when IceGrid node is running as root, it is possible to run the server under any username. Enter the desired username in this field.
  When not set (the default), the server runs as the same user as the IceGrid node, except when IceGrid node runs as root. In this case, the server runs as nobody.

• Environment Variables
  The environment variables for the server when started by the IceGrid node. These variables are in addition to variables defined in the IceGrid node own environment.

• Activation Mode
  The server's activation mode. Must be one of:

The Activation Mode can also be a variable or a combination of variables that resolves to one of the values above.       

• Activation Timeout
  When activating a server, IceGrid gives timeout seconds to object adapters with server lifetime to register their endpoints with the IceGrid registry. During this time, lookup for the corresponding adapter IDs are delayed.
  If not set or set to 0, the IceGrid node uses the value of its IceGrid.Node.WaitTime property.

• Deactivation Timeout
  When deactivating a server, IceGrid gives timeout seconds to the server to exit gracefully. After this timeout, the server process is killed.
  If not set or set to 0, the IceGrid node uses the value of its IceGrid.Node.WaitTime property.

• Allocatable
  Specifies whether the server can be allocated. A server is allocated implicitly when one of its allocatable objects is allocated. This checkbox is ignored if the server activation mode is session; a server with this activation mode is always allocatable. Default: false.

Children

A plain server can have Adapter children.

IceBox Server

Properties

The Properties panel for an IceBox server is identical to the Properties panel for a Plain Server (see above).

When you create a new IceBox server, some properties are created automatically:

The Ice.Admin.Endpoints setting enables the Admin object in the main communicator of this IceBox server.

The Path to Executable is typically icebox (C++), java (for a Java IceBox) or dotnet (for a .NET IceBox).

Children

An IceBox server can have Service children,

Server Instance

A server instance is a server created from a server template; it may be a plain server or an IceBox server.

Properties

The Server Instance Properties panel offers the following fields:

• Template
  The name of the Server Template.

• Parameters
  Use this table to assign values to the template parameters defined in the server template.

• Property Sets
  List of property-set IDs; you refer to a property set to "include" all its properties in this server-instance.

• Properties
  Ice properties private to this server. Overall, the properties of the server instance are a combination of properties defined in the server template (including its own property sets references) augmented and possibly overridden by properties defined in the server instance.

Children

An instance of an IceBox server template can have Property Set children.

An instance of a plain server template cannot have any child.