Features

• Group launch, start/stop and reboot  with predefined procedure
• Group snapshot and restore with individual scaling of resources - instance type, ebs volume size
• GroupStack cloning over cross-regions and multi-AWS accounts
• GroupStack cloning from EC2 classic to VPC and vice versa

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Group Launch

• Creates EBS volumes
  • Apache Tomcat data 01 (vol-tomcat01)
  • Apache Tomcat data 0n (vol-tomcat0n)
• Security Groups and Rules creation
  • SSH(22), HTTP(8080), HTTPS(8443)
• Launchs Instances (On-Demand or Spot)
• Attaches EBS Volumes to Instances
• Creates and mounts Filesystems
  • ​vol-tomcat ( /home/apache-tomcat ...)

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Group Launch - cont'd

• Installs Softwares
  • ​Apache Tomcat 7 (apache.org)
  • libtcnative Tomcat Native Library
  • JMX Remote (catalina-jmx-remote.jar)
  • $CATALINA_HOME/conf/server.xml
  • $CATALINA_HOME/bin/setenv.sh
• Starts Tomcat Stacks
  • $CATALINA_HOME/startup.sh

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Group Start

• You can change Instance types if required 
• You can change Bidding Price for Spot Instances if necessary
• Starts Instances. If any of them is Spot, it will newly be requested with preserved AMI which was created  when the Instance was stopped.
• Attaches Volumes if they are members of Spot Instances
• Mounts Filesystems
• Runs Post Bash Scripts (System/User Defined)
• Starts Application with pre-defined Start Order and dependencies

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Group Reboot

• Stops Applications with reversed Start Order and dependencies
• Unmounts Filesystems
• Reboots Instances
• Checks if Instance reboot completed
• Mounts Filesystems
• Runs Post Bash Script (System/User Defined)
• Starts Applications with pre-defined Start Order and dependencies

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Group Snapshot

• Freezes Filesystems if configured to do that and starts snapshot EBS Volumes (including root Volumes) immediately. And just after start snapshot initiated, unfreezes Filesystems.
• The status of Filesystems and Instances when the Snapshot Initiated will be saved for future reference
• Restoring GroupStack Snapshot which was snapshoted while it was running MAY NOT BE SUCCESSFUL . You should verify it.

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Group Snapshot Restore

• Group Snapshot is restorable when the GroupStack is in 'stopped' status.
• Size of GroupStack Volumes (including root) can be increased  through Group Snapshot Restore
• Detaches Volumes (includeing root) from Instances and creates new volumes from Group Snapshot
• Attaches Volumes to the instances if the creation completed.
• Starts Instances and resizes root Volumes
• Resizes and mounts (or vice versa) Filesystems

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Clone GroupStack

• You can Clone GroupStack with Group Snapshot
• Cloning GroupStack over other Availability Zone or other Region, other AWS Account is possible
• If you clone GroupStack over other Region, all Group Snapshot will be copied to the destination first and then the original GroupStack configuration will be transformed into the Region.

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Clone GroupStack - cont'd

• You can launch cloned GroupStack with minimal configuration modifications.

• GroupStack variables, schedules, triggers and  Security Group rules referencing objects outside GroupStack will not be cloned to new one.

• You may require modifying Post Bash Scripts as needed.

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Apache Tomcat

Open-source web server and servlet container developed by the Apache Software Foundation

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Tomcat Native Library

Tomcat Native Library gives Tomcat access to the Apache Portable Runtime (APR) library's network connection (socket) implementation and random-number generator.

JMX Remote

Java Management Extensions (JMX) is a Java technology that supplies tools for managing and monitoring applications, system objects, devices and service-oriented networks.

Looking inside a running server, obtaining some statistics or reconfiguring some aspects of an application is possible through this technology.

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