Add controller id range to ceph-nvmeof.conf and pass to gateway

[gbregman]

Add controller id range to ceph-nvmeof.conf and pass to gateway. This allows using the partioning of controller id range between gateways, to be done later by Ceph-adm.

Related to issue #121

[baum]

lgtm 🖖

[PepperJo]

LGTM

[idryomov]

@gbregman The commit message needs to be amended according to https://github.com/ceph/ceph-nvmeof/blob/devel/CONTRIBUTING.md#commit-format. In particular, the title should be short and separated from the body.

[idryomov]

If you see GitHub truncating the commit title and showing ... there (in this case it also affects the PR title as there is just a single commit), it's good a sign that something is wrong ;)

[idryomov]

@gbregman Please squash the second commit so that there is only one. The commit message still needs to be adjusted too. I would suggest:

control: add min and max controller id options

Add min and max controller id options to ceph-nvmeof.conf and pass
them to SPDK. This allows to partion the controller id range between
several gateways in a gateway group.

Fixes: #121

Signed-off-by: Gil Bregman <[email protected]>

[idryomov]

Please squash the second commit so that there is only one.

@gbregman This ended up with 4 commits, one of which is a bogus merge commit (while the "real" merge commit is missing Reviewed-by tags). Please don't merge PRs with outstanding comments even if the comment is not on the code itself.