Hello Gorka,

Thank you for replying!
I'll try to run glance-api and cinder-volume on the same node
according to your information.

On 2018/02/07 19:27, Gorka Eguileor wrote:
On 07/02, Rikimaru Honjo wrote:
Hello,

I'm planning to use cinder as glance store.
And, I'll setup cinder to connect storage by iSCSI multipath.

In this case, can I run glance-api and cinder-volume on the same node?

In my understanding, glance-api will attach a volume to own node and
write a uploaded image to the volume if glance backend is cinder.
I afraid that the race condition of cinder-volume's iSCSI operations
and glance-api's iSCSI operations.
Is there possibility of occurring it?
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Rikimaru Honjo
E-mail:honjo.rikim...@po.ntt-tx.co.jp



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Hi,

When properly set with the right configuration and the right system and
OpenStack packages, Cinder, OS-Brick, and Nova no longer have race
conditions with iSCSI operations anymore (single or multipathed), not
even with drivers that do "shared target".

So I would assume that Glance won't have any issues either as long as
it's properly making the Cinder and OS-Brick calls.

Cheers,
Gorka.

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Rikimaru Honjo
E-mail:honjo.rikim...@po.ntt-tx.co.jp



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