Tutorials/CloudSim/trouble shooting

Troubleshooting ===

CloudSim can go wrong, especially when trying to launch constellations with multiple machines that use advanced features of Amazon Web Services. This tutorial presents you with common errors and how to fix them. You will notice these errors when launching simulations and machine trios (see Launch/terminate constellations in the cloud) :


 * 1) Unsupported VPC




 * 1) Affects
 * Launching VRC (Virtual Robotics Challenge) or VRC-stable (Virtual Robotics Challenge) constellations.
 * 1) Problem description

If you get the following message, it is because you are using an availability zone inside which VPCs are not available for machines with GPUs (cg1.4x.large) are not available.


 * 1) Fix

you must change your availability zone. You must be an admin user with your Amazon Web Services credentials at hand to perform this operation.See CloudSim administration


 * 1) VPC limit exceed




 * 1) Affects
 * Launching VRC (Virtual Robotics Challenge) or VRC-stable (Virtual Robotics Challenge) constellations.


 * 1) Problem description

This error is because your account is not authorized to create a VPC for this constellation. This maybe caused by:
 * 1) Fix
 * VPCs that were not released when Constellations were terminated: check in your AWS console and remove VPCs manually. You should also check for machines left running accidentally.
 * Limits in your account: you can ask for limit increases by following the steps here See AWS account and keys: How to get an Amazon AWS account and set it up for CloudSim.


 * 1) Subnet error



The constellation is trying to create a subnet in an availability zone where subnets are not available. you must change your availability zone. You must be an admin user with your Amazon Web Services credentials at hand to perform this operation.See CloudSim administration
 * 1) Affects
 * Launching VRC (Virtual Robotics Challenge) or VRC-stable (Virtual Robotics Challenge) constellations.
 * 1) Problem description
 * 1) Fix


 * 1) Address limit exceeded



This error is because your account is not authorized to create additional elastic IPs for this constellation. This maybe caused by:
 * 1) Affects
 * Launching VRC (Virtual Robotics Challenge) or VRC-stable (Virtual Robotics Challenge) constellations.
 * 1) Problem description
 * 1) Fix
 * Elastic IPs that were not released when Constellations were terminated: check in your AWS console and remove EIPs manually. You should also check for machines left running accidentally.
 * Limits in your account: you can ask for limit increases by following the steps here See AWS account and keys: How to get an Amazon AWS account and set it up for CloudSim.