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
  • Tomcat stack data (vol-tcat-home)
  • MySQL stack data (vol-mysql-home)
• Creates Security Groups and Rules
  • Tomcat stack : SSH(22), HTTP(8080), HTTPS(8443)
  • MySQL stack : SSH(22), MySQL(3306)
• Launches Instances (On-Demand or Spot)
  • Tomcat stack and MySQL stack

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Group Launch - cont'd

• Attaches EBS volumes to Instances
  • Tomcat stack data (vol-tcat-home)
  • MySQL stack data (vol-mysql-home)
• Creates and Mounts Filesystems
  • Tomcat stack    :
    • vol-tcat-home(/home/apache-tomcat7)
  • MySQL stack : vol-mysql(/var/lib/mysql) 

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Group Launch - cont'd

• Installs Softwares ( yum install, etc. )
  • Tomcat stack - Apache Tomcat 7
  • MySQL stack - MySQL 5
• Starts Applications with pre-defined start orders and dependencies
  • Starts MySQL (Start Order 01)
  • Waits until MySQL running
  • Starts Tomcat (Start Order 02)

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Group Launch - cont'd

• To connect Tomcat, navigate to URL
  • http://<Tomcat Instance Public IP>:8080/​​
  • https://<Tomcat Instance Public IP>:8443/

• You can check MySQL connection with simple jsp execution
  • ​ http://<Tomcat Instance Public IP>:8080/dbtest.jsp
  • ​https://<Tomcat Instance Public IP>:8443/dbtest.jsp

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Group Stop

• Stops Applications with reversed start orders and dependancies
  • Stops Tomcat (Start Order 02)
  • Waits until Tomcat Stopped
  • Stops MySQL (Start Order 01)
• Unmounts Filesystems
  • Tomcat stack    : umount /home/apache-tomcat7
  • MySQL stack : umount /var/lib/mysql

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Group Stop - cont'd

• Stops Instances and waits until stopped
• Creates root Volume Snapshot and registers AMI if Instance lifecycle is Spot and it has never been preserved before (for next Spot Instance StartUp)

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Group Start

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• 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 Instances was stopped 
• Attaches EBS Volumes if Spot Instance owns them
• Mounts Filesystems
• Runs Post Bash Scripts (System/User Defined)
• Starts Application with pre-defined Start Orders and dependencies

Group Reboot

• Stops Applications with reversed start orders and dependencies
• Unmounts Filesystems
• Reboots Instances
• Checks if Instances rebooted
• Mounts Filesystems
• Runs Post Bash Script (System/User-Defined)
• Starts Applications with pre-defined start orders and dependencies

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Group Snapshot

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

Group Snapshot Restore

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• Group Snapshot is restorable when the GroupStack is in 'stopped' status.
• You can increase the size of GroupStack Volumes (including root) through 'Restore GroupStack'.
• 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

Clone GroupStack

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• You can Clone GroupStack with Group Snapshot.
• Cloning GroupStack can be done over other Availability Zone or other Region or other AWS account.
• If you clone GroupStack over other Region, copying Group Snapshot to the destination Region is initiated first and then the source GroupStack configuration is transformed into the Region.

Clone GroupStack

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• You can Launch GroupStack with minimal configuration modifications.
• Cloning does not include GroupStack variables, schedules, triggers. Any Security Group rules which are referencing objects outside GroupStack is not cloned to a new one.