On 20/06/2023 01:16, Work Ceph wrote:
I see, thanks for the feedback guys!
It is interesting that Ceph Manager does not allow us to export iSCSI
blocks without selecting 2 or more iSCSI portals. Therefore, we will
always use at least two, and as a consequence that feature is not
going to be supported. Can I export an RBD image via iSCSI gateway
using only one portal via GwCli?
@Maged Mokhtar, I am not sure I follow. Do you guys have an iSCSI
implementation that we can use to somehow replace the default iSCSI
server in the default Ceph iSCSI Gateway? I didn't quite understand
what the petasan project is, and if it is an OpenSource solution that
we can somehow just pick/select/use one of its modules (e.g. just the
iSCSI implementation) that you guys have.
For sure PetaSAN is open source..you should see this from the home page :)
we use Consul
https://www.consul.io/use-cases/multi-platform-service-mesh
to scale-out the service/protocol layers above Ceph in a scale-out
active/active fashion.
Most of our target use cases are non linux, such as VMWare and Windows,
we provide easy to use deployment and management.
For iSCSI, we use kernel/LIO rbd backstore originally developed by SUSE
Enterprise storge. We have done some changes to send persistence
reservations using the Ceph watch/notify, we also added changes to
coordinate pre-snapshot quiescing/flushing across different gateways. We
ported rbd backstore to 5.14 kernel.
You should be able to use the iSCSI gateway by itself on existing non
PetaSAN clusters but it is not a setup we support. You would use the LIO
targercli to script the setup. There are some things to take care of
such as setting the disk serial wwn to be the same across the different
gateways serving the same image, setting up the multiple tpgs (target
portal groups) for an image but only enabling the tpgs for local node.
This setup will be using multi path MPIO to provide HA. Again it is not
a setup we support, you could try it yourself in a test environment, you
can also setup a test PetaSAN setup and examine the LIO configuration
using targetcli. You can send me email if you need any clarifications.
Cheers /Maged
_______________________________________________
ceph-users mailing list -- ceph-users@xxxxxxx
To unsubscribe send an email to ceph-users-leave@xxxxxxx
