[colug-432] ec2 instance

[R P Herrold]

On Fri, 3 Jul 2015, Rick Hornsby wrote:

> Yes, sorry I should have mentioned that.  I have the private 
> key.  The ssh debug output suggests I'm not even getting to 
> the stage where I would submit an authentication key.

> debug1: Connecting to 52.4.7.x [52.4.7.x] port 22.
> debug1: connect to address 52.4.7.x port 22: Operation timed out
> ssh: connect to host 52.4.7.250 port 22: Operation timed out

Assuming the instance is 'live', it looks as though you have 
not yet linked the external IP on port 22 to the instance 
(which uses a non-routable RFC1918 address), because you are 
not getting a connection to the instance.  For resilliance 
purposes, there is a layer two mapping between an internal 
RFC1918 IP (which the instance thinks is its IP), and the 
external routable IP (which the 'routable' world sees), which 
may be moved around between instances

	http://aws.amazon.com/articles/1346

This is confusing to people coming to VM's under Xen or 
OpenShift, who are accustomed to tangible hardware, which 
usually omits a separate layer 2 setup

PMMan omits this step and does direct assignment and 
management of routable IPs to instances, at the expense of 
needing a 'wink outage' to move a VM from one backend dom0 to 
another, and also complexifying routing issues for cross-DC 
fail-across [The usual answer is: don't do it that way, but 
rather set up intermediate VPN tunnelling]

-- Russ herrold