Apache Geode

Setting Up the HTTP Module for tc Server

To set up the HTTP Module for tc Server, start a tc Server instance with the appropriate tc Server template based on your preferred topology.

Note: In the procedures that follow, you may be required to log in as root or use sudo to run the commands in Unix, especially if you installed Pivotal tc Server from RPM using yum.

Setup and Start

Edit the configuration in the appropriate file for the topology to set the locator host and port. For peer-to-peer topology, edit geode-p2p/conf/catalina.properties to set the geode-p2p.locators property. For client/server topology, edit geode-cs/conf/cache-client.xml.

Create a tc Server instance using one of these commands, choosing the appropriate template for the topology. Add the --version option if you need to pin your tc Server instance to a specific version of the tc Runtime:

In Unix, for a peer-to-peer topology:
  $ ./tcruntime-instance.sh create my_instance_name --template geode-p2p

In Unix, for a peer-to-peer topology, with a pinned tc Server instance:
  $ ./tcruntime-instance.sh create --version 6.0.32.A.RELEASE \
  my_instance_name --template geode-p2p

In Unix, for a client/server topology:
  $ ./tcruntime-instance.sh create my_instance_name --template geode-cs

In Unix, for a client/server topology, with a pinned tc Server instance:
  $ ./tcruntime-instance.sh create  --version 6.0.32.A.RELEASE \
  my_instance_name --template geode-cs

In Windows, for a peer-to-peer topology:
  $ tcruntime-instance.bat create my_instance_name --template geode-p2p

In Windows, for a peer-to-peer topology, with a pinned tc Server instance:
  $ tcruntime-instance.bat create --version 6.0.32.A.RELEASE ^
  my_instance_name --template geode-p2p

In Windows, for a client/server topology:
  $ tcruntime-instance.bat create my_instance_name --template geode-cs

In Windows, for a client/server topology, with a pinned tc Server instance:
  $ tcruntime-instance.bat create  --version 6.0.32.A.RELEASE ^
  my_instance_name --template geode-cs

To run, first start the locator, which will listen on its default of port number 10334:

$ gfsh start locator --name=locator1

With a similar environment to this example that is for a client/server set up,

TC_VER=tomcat-8.0.30.C.RELEASE
INSTANCE=geode-cs
CLASSPATH=$PWD/$INSTANCE/lib/geode-modules-1.0.0.jar:\
$PWD/$INSTANCE/lib/geode-modules-tomcat8-1.0.0.jar:\
$PWD/$TC_VER/lib/servlet-api.jar:\
$PWD/$TC_VER/lib/catalina.jar:\
$PWD/$TC_VER/lib/tomcat-util.jar:\
$PWD/$TC_VER/bin/tomcat-juli.jar

Start the server using gfsh:

$ gfsh start server --name=server1 --locators=localhost[10334] \
        --server-port=0 --classpath=$CLASSPATH

Starting the Application Server

Once you’ve created a tc Server instance, you are ready to start the instance.

In Unix:
  $ ./tcruntime-ctl.sh my_instance_name start

In Windows:
  $ ./tcruntime-ctl.bat my_instance_name start

Refer to the tc Server documentation for more information. Once started, Geode will automatically launch within the application server process.

Note: Geode session state management provides its own clustering functionality. If you are using Geode, you should NOT turn on Tomcat clustering as well.

To verify that the system is running, check the log file for a message similar to:

Mar 29, 2016 8:38:31 AM org.apache.geode.modules.session.bootstrap.AbstractCache
lifecycleEvent
INFO: Initializing Geode Modules
Modules version: 1.0.0
Java version:   1.0.0 user1 032916 2016-11-29 07:49:26 -0700
javac 1.8.0_92
Native version: native code unavailable
Source revision: c36591b73243c7ee3a0186710338453d12efe364
Source repository: develop
Running on: /192.0.2.0, 8 cpu(s), x86_64 Mac OS X 10.11.4

Information is also logged within the Geode log file, which by default is named gemfire_modules.log.

Configuring Non-Sticky Session Replication

Some situations require that sessions be ‘non-sticky’, which means that client requests can be directed to any server in a cluster of application servers instead of the same server each time. To achieve this, you must configure your deployment as described for the following topologies.

Peer-to-Peer

For peer-to-peer topologies, apply the following settings to enable non-sticky sessions to work correctly:

• Java system property gemfire.loadClassOnEveryDeserialization=true. Set this property by editing the bin/setenv.sh file.
• prefer.deserialized.form=false. Set this property in conf/catalina.properties.

Client-server

For client-server topologies, only the Java system property gemfire.loadClassOnEveryDeserialization=true must be set, in the bin/setenv.sh file.

Note: Non-sticky sessions cause a performance impact because sessions need to be re-created every time a request hits a different server. This may not be noticeable when the session attributes are small, but may become more evident as the session attributes increase in size and/or number.