[PVE-User] Interface not renamed...

[Marco Gaiarin]

Mandi! Fiona Ebner
  In chel di` si favelave...

> see also:
> https://pve.proxmox.com/pve-docs/chapter-sysadmin.html#_naming_conventions
> 
> The recommended way to avoid such renaming issues is to pin the name
> based on MAC address:
> https://pve.proxmox.com/pve-docs/chapter-sysadmin.html#network_override_device_names

Thanks, Fiona; but it is not the renaming 'per se' that scare me, was
written in the documentation, i was prepared of.

But probably i've found the culprit.


Systems get installed in some PVE 6.X version, and have a direct bond
between two nodes to manage replication and migration; in PVE6 we had some
trouble to setup jumbo frames for the bond, because some times the server
boot with MTU=9000 on the bond but not on the member link.

We solved it adding 'allow-bond2' to the member stanzas on
/etc/network/interfaces.


Seems to me that:

1) PVE 7 effectively rename interfaces; as just stated, this is expected, no
 trouble.

2) PVE 8 add 'ifupdown2', that is incompatible with 'allow-bond2' option AND
 in some way ''mangle' all the ifupdown -> ifupdown2 migration: server boot
with NO interface up, but also some other things seems does not work very
well.


Because i've still some server to migrate, i've removed 'allow-bond2'
options BEFORE initiate the upgrade PVE7 -> 8, and migration went smoothly,
precisely:
 - interface start at next boot
 - all interfece went up, even get renamed, because 'altname' get correctly
   used.


I hope i was clear. And useful. ;-)

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