VPC Offering silently changed when activating "Make redundant" when restarting the VPC.

[zidz]

problem

I have a few dual stack VPCs.
I did activate "Make redundant" when restarting the VPC, I realized that IPv6 addresses where gone from my VMs and BGP did not ask it's neighbor to create IPv6 routes. After some troubleshooting I realized that the VPC had a new VPC offering. I had to change the offering back (and the redundant setting) by altering the tables in MariaDB.

There needs to be some information (warning) that the VPC offering is changed when this function is activated, potentially removing functionality of the VPC.

versions

Cloudstack version 4.22

The steps to reproduce the bug

1. Activate "Make redundant" when restarting a VPC.

What to do about it?

No response

[DaanHoogland]

@zidz , this function is under on-going debate.
camp 1: It should not be there
camp 2: it must be there and well documented
camp 3: it must be there behind feature flags of sorts.

Did you use the UI or the API to make the VPC redundant?

[zidz]

I did use the UI to enable it.

[DaanHoogland]

@zidz , in 22.0 there should not be such an option in the ui anymore. Where did you find it? it used to be in this dialogue:

[zidz]

Not restart network, when you restart a VPC that option shows up.
326482063623795.pdf

Sorry for the low quality screenshot, as there is a hassle to make screenshots with QubesOS....

[mathwest]

@DaanHoogland Is there perhaps an ongoing discussion you could link to? As i am Strongly of the opinion of camp 1 but would potentially be a camp 3 if i read it as By default NOT there but if you enable a flag that allows failover to different offering if no suitable offering is pre-selected, preferably the ability to "pair" redundant and non redundant offerings as the ones that can be shifted between, perhaps this would count as an camp 4?

[DaanHoogland]

@mathwest , this has come up in several discussions over the years. (cc @GutoVeronezi @andrijapanicsb @yadvr )

The feature was introduced in 4.6 and disabled in the UI in 4.14 (iirc) there is a PR in stalemate now that intents to re-introduce it.

I did think about the pairing idea the other day as well. So in that case the option would only show if a paired redundant offering is available. Would that also mean the dropping back from redundant to single router is also an option? What I came up with in that same train of thought was that if you had pairs of offerings you would already know how to upgrade a network, so why do the pairing at all, it would just be a matter of choosing the accompanying offering.