Public bug reported:
Take three instances in two regions (A and B) such that they are named
A1, A2, and B1. A1 is the only instance with a public IP: A2 and B1
only have the standard private IPs they were given. In this situation:
A1 can reach both of its own interfaces.
B1 can reach A1's public IP, but not its private IP.
A2 can reach A1's private IP, but not its public IP.
This last line is counter-intuitive, as B1 can reach A1's public IP just
fine. In fact, if we bring a public IP up on B1, A2 can reach B1's
public IP without trouble.
Traceroutes halt right out of the gate, which may or may not indicate
that this is enforced by nova-network itself.
** Affects: nova (Ubuntu)
Importance: Undecided
Status: New
** Tags: canonistack
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https://bugs.launchpad.net/bugs/1022612
Title:
private instance IPs can only reach public IPs in other regions, not
the same region
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