[stein][manila] share migration misconfiguration ?

Rodrigo Barbieri rodrigo.barbieri2010 at gmail.com
Thu Feb 4 20:13:37 UTC 2021

Hello Ignazio,

If you are attempting to migrate between 2 NetApp backends, then you
shouldn't need to worry about correctly setting the data_node_access_ip.
Your ideal migration scenario is a driver-assisted-migration, since it is
between 2 NetApp backends. If that fails due to misconfiguration, it will
fallback to a host-assisted migration, which will use the
data_node_access_ip and the host will attempt to mount both shares. This is
not what you want for this scenario, as this is useful for different
backends, not your case.

if you specify "manila migration-start --preserve-metadata True" it will
prevent the fallback to host-assisted, so it is easier for you to narrow
down the issue with the host-assisted migration out of the way.

I used to be familiar with the NetApp driver set up to review your case,
however that was a long time ago. I believe the current NetApp driver
maintainers will be able to more accurately review your case and spot the

If you could share some info about your scenario such as:

1) the 2 backends config groups in manila.conf (sanitized, without
2) a "manila show" of the share you are trying to migrate (sanitized if
3) the "manila migration-start" command you are using and its parameters.


On Thu, Feb 4, 2021 at 2:06 PM Ignazio Cassano <ignaziocassano at gmail.com>

> Hello All,
> I am trying to migrate a share between a netapp backend to another.
> Both backends are configured in my manila.conf.
> I am able to create share on both, but I am not able to migrate share
> between them.
> I am using DSSH=False.
> I did not understand how host and driver assisted migration work and what
> "data_node_access_ip" means.
> The share I want to migrate is on a network ( that I can
> reach by my management controllers network ( I Can mount
> share from my controllers and I can mount also the netapp SVM where the
> share is located.
> So in the data_node_access_ip I wrote the list of my controllers
> management ips.
> During the migrate phase I checked if my controller where manila is
> running mounts the share or the netapp SVM but It does not happen.
> Please, what is my mistake ?
> Thanks
> Ignazio

Rodrigo Barbieri
MSc Computer Scientist
OpenStack Manila Core Contributor
Federal University of São Carlos
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