bwLehrpool-Server - Management Server for Virtual Machines and Events
The bwLehrpool-Server is a bwLehrpool server application to manage virtual machines and events for study and coursework.
Already created virtual machines can be uploaded to the bwLehrpool-Server to share those virtual machines with students and workgroup members as well as link them to events.
A virtual machine download from the bwLehrpool-Server allows customization of virtual machines locally for your purposes.
Build
A build of the bwLehrpool-Server requires the installation of the build automation tool Maven and the Java development kit OpenJDK 8.
Dependencies
If a Maven offline build takes place (mvn -o), the following dependencies are required and must be built manually first:
Application
The bwLehrpool-Server application can be built automatically by calling Maven with the following command line call:
A build of the bwLehrpool-Server application creates a Java archive file (*.jar) that can be found at target/dozmod-server-*-jar-with-dependencies.jar.
Docker Container
A docker image of the bwLehrpool-Server and its required infrastructure can be built and started with the following command line call:
mvn -P dozmod-server:start
Note that a complete Docker infrastructure (images, containers, networks, and volumes) is created and started automatically after this call using docker-compose.
To stop the bwLehrpool-Server container and its entire infrastructure, use the following command line call:
mvn -P dozmod-server:stop
Configuration
Server
The bwLehrpool-Server application requires a Java property configuration file for its operation.
A template for this configuration file can be found at setup/config.properties.tmpl.
The template can be finalized with the dockerize utility using the following command line call where DOZMOD_* are environment variables to finalize the content of the configuration file:
export DOZMOD_DATABASE_HOST="192.168.200.20"
export DOZMOD_DATABASE_NAME="sat"
export DOZMOD_DATABASE_USER="root"
export DOZMOD_DATABASE_PASSWORD="dozmod"
export DOZMOD_DATABASE_LOCATION_TABLE=""
export DOZMOD_MASTER_SERVER_HOST="bwlp-masterserver.ruf.uni-freiburg.de"
export DOZMOD_MASTER_SERVER_PORT="9091"
export DOZMOD_MASTER_SERVER_USE_SSL="true"
export DOZMOD_VSTORE_PATH="/mnt/bwLehrpool"
# finalize the template content with values from environment variables
dockerize -template setup/config.properties.tmpl:config.properties
Logging
The logging of the bwLehrpool-Server application to the console is implemented with log4j.
Default Logging Configurations
The default logging configurations are specified in the property file under src/main/properties/log4j.properties.
This configuration file is packaged automatically into the bwLehrpool-Server application during a build.
Overwrite Logging Defaults
If logging configurations other than the defaults are required, the configuration file packaged into the bwLehrpool-Server application can be overwritten by specifying a custom configuration file.
The custom configuration file is specified by execute the bwLehrpool-Server application with the following command line call where <CONFIG> is an absolute path to the custom configuration file and <APP> is a path to the built bwLehrpool-Server application (Java archive file):
java -Dlog4j.configuration=file:<CONFIG> -jar <APP>
Execution
An execution of the bwLehrpool-Server application requires an already finalized bwLehrpool-Server configuration file located in the current working directory.
This configuration file can be created from a configuration template as explained above.
Then, the bwLehrpool-Server application can be executed with the following command line call where <APP> is a path to the built bwLehrpool-Server application (Java archive file):
