Requirements for tcmu-runner on CentOS 7.4

Requirements for tcmu-runner on CentOS 7.4

[Raghuram Devarakonda]

Hi,

I am developing a tcmu-runner plugin that would run on CentOS 7.4. The
kernel version on my test CentOS box shows up as
"3.10.0-693.17.1.el7.x86_64" which might be too old from what I have
been reading. Are there any recommendations on the minimum version for
kernel as well as tcmu-runner? Also, I see targetcli's version as
"2.1.fb46" and I do see my plugin show up in the backstores. Is this
version sufficient or do I need to use a different one?

Any help is greatly appreciated.

Thanks,
Raghu

Re: Requirements for tcmu-runner on CentOS 7.4

[Mike Christie]

On 04/22/2018 01:43 PM, Raghuram Devarakonda wrote:
> Hi,
> 
> I am developing a tcmu-runner plugin that would run on CentOS 7.4. The
> kernel version on my test CentOS box shows up as
> "3.10.0-693.17.1.el7.x86_64" which might be too old from what I have
> been reading. Are there any recommendations on the minimum version for
> kernel as well as tcmu-runner? Also, I see targetcli's version as

The RHEL 7.5 kernel is probably best to use. We did a rebase of LIO so
there are lots of bug fixes.

> "2.1.fb46" and I do see my plugin show up in the backstores. Is this
> version sufficient or do I need to use a different one?
> 

Are these the versions installed by Centos?

I think it is best to use the upstream releases:

https://github.com/open-iscsi/rtslib-fb/releases
https://github.com/open-iscsi/targetcli-fb/releases

because upstream has been moving quickly and the rhel/centos runner
support for rtslib/targetcli has not been.

Re: Requirements for tcmu-runner on CentOS 7.4

[Raghuram Devarakonda]

On Mon, Apr 23, 2018 at 1:04 PM, Mike Christie <mchristi@redhat.com> wrote:
> On 04/22/2018 01:43 PM, Raghuram Devarakonda wrote:
>> Hi,
>>
>> I am developing a tcmu-runner plugin that would run on CentOS 7.4. The
>> kernel version on my test CentOS box shows up as
>> "3.10.0-693.17.1.el7.x86_64" which might be too old from what I have
>> been reading. Are there any recommendations on the minimum version for
>> kernel as well as tcmu-runner? Also, I see targetcli's version as
>
> The RHEL 7.5 kernel is probably best to use. We did a rebase of LIO so
> there are lots of bug fixes.

Thanks for the response. From the following page, kernel version for
RHEL 7.5 is listed as "3.10.0-862". Just wanted to confirm that this
is what you had in mind. I saw lot of references to kernel 4.x having
better support for TCMU but perhaps, the fixes are backported?

>> "2.1.fb46" and I do see my plugin show up in the backstores. Is this
>> version sufficient or do I need to use a different one?
>>
>
> Are these the versions installed by Centos?
>
> I think it is best to use the upstream releases:
>
> https://github.com/open-iscsi/rtslib-fb/releases
> https://github.com/open-iscsi/targetcli-fb/releases
>
> because upstream has been moving quickly and the rhel/centos runner
> support for rtslib/targetcli has not been.

Ok, got it.

Thanks,
Raghu