Re: [DRBD-user] DRBD 8.0 life cycle

[Roland Kammerer]

On Tue, Sep 21, 2021 at 07:09:49AM -0700, Paul D. O'Rorke wrote:
> I have to pass on my thanks and respect.
> 
> I have been running a 3 node "Stacked" replication set on 8.9.6 for some
> years now.  This weekend I finally bit the bullet and installed 9.11.0 from
> the Ubuntu 20.04 LTS  repos on new hardware and I am blown away at how
> simple and efficient the move was.

I'm not sure if there is some misunderstanding here...

Your kernel module (shipped with the Ubuntu kernel image) is still
in-tree DRBD 8.4. Assuming that you did not install DRBD 9.0/9.1 from
source/our PPA as well.

So to me it looks like you only updated the user-space tools (from 8.9.6
to 9.11.0). And yes, expected that that just works, we have not touched
the parts used for *kernel module* 8.4 in years by now I guess. A long
time ago we just called the next drbd-utils version 9.x instead of 8.x
to flag that we now fully support *kernel module* 9.0 (at the time, now
also 9.1). But it was just a version change without any meaning for
kernel module 8.4. We could have called the user space parts 42.23, but
the kernel module would still be 8 or 9.

Also I expect that a real kernel module switch from 8 to 9 would be that
smooth, but to me it looks like you just updated user space (and
probably the in kernel module from 8 something to 8 something else) as
part of a newer kernel.

cat /proc/drbd might clarify that a bit :)

Regards, rck
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Re: [DRBD-user] DRBD 8.0 life cycle

[Paul D. O'Rorke]

I have to pass on my thanks and respect.

I have been running a 3 node "Stacked" replication set on 8.9.6 for some 
years now.  This weekend I finally bit the bullet and installed 9.11.0 
from the Ubuntu 20.04 LTS  repos on new hardware and I am blown away at 
how simple and efficient the move was.


1. Define the resource
2. create-md
3. bring it up
4. Go home and drink tea...

wow - it "just works" and how!  I came in this morning the happy owner 
of a newly replicated set of 16 VMs and I have paid not a cent to you guys.


The very least I can do is say thanks.  Thanks for the great work and 
thanks even more for making it publicly accessible.


* Paul O'Rorke*
* Tracker Software Products (Canada) Limited *
www.tracker-software.com 
 Tel:  +1 (250) 324 1621
 Fax: +1 (250) 324 1623



 Support:
http://www.tracker-software.com/support 


 Download latest Releases
http://www.tracker-software.com/downloads/ 






On 2021-08-26 9:09 a.m., Paul D. O'Rorke wrote:


Thanks Lars,


DRBD 9 does everything DRBD 8 does.
Some things it does better.
And it can do some things you may not (yet) need.


I went ahead and did the reading...  ;-)   I will move to DRBD9.


You can use DRBD 9 the same way you used DRBD 8, if you want to.
(some config options have been renamed, or moved to different sections)


I was very pleased to see how my current config will still work 
without having to revisit what I am doing.


You guys really are amazing with what you offer for free! Thanks for 
the great work.  You have saved my bacon multiple times.


cheers

* Paul O'Rorke*
* Tracker Software Products (Canada) Limited *
www.tracker-software.com 
 Tel:  +1 (250) 324 1621
 Fax: +1 (250) 324 1623



 Support:
http://www.tracker-software.com/support 


 Download latest Releases
http://www.tracker-software.com/downloads/ 






On 2021-08-26 6:03 a.m., Lars Ellenberg wrote:

On Tue, Aug 03, 2021 at 03:34:58PM -0700, Paul D. O'Rorke wrote:

Hi all,

I have been running a DRDB-8 simple 3 node disaster recovery set up of
libvirt VMs for a number of years and have been very happy with it.   Our
needs are simple, 2 servers on Protocol C, each running a handful of VMs as
primary and replicated to the other, and both stacked to a third server via
protocol A for disaster recover/point in time backups (I run my nightly
backups off of the tertiary node so as to limit the impact on the two
primary servers.)

Now my hardware needs replacing and it looks like DRBD 8 is no longer
available?    We are not Amazon, we do not need a full cluster with all it's
bells and whistles, the classic DRBD8 three node setup still works for me.

My question is whether DRBD8 is still "supported"and whether there are good
reasons to move to DRBD9?

Depends on what you feel "supported" means.

As we put on our web page athttps://linbit.com/solutions-rfq/
DRBD 8 < 8.4 is end of life.
DRBD 8.4 has left "active maintenance" years ago, but needs to be supported
while existing customers pay for existing deployments.  The "relevant" platform
here is RHEL 7, which ends its "Extended Lifecycle Support" in 2026,
so that's the end date for our 8.4 support as well.

For new deployments, or more recent Platforms (RHEL 8, etc),
Linbit does provide support for DBRD 9 or later.

DRBD 9 does everything DRBD 8 does.
Some things it does better.
And it can do some things you may not (yet) need.

You can use DRBD 9 the same way you used DRBD 8, if you want to.
(some config options have been renamed, or moved to different sections)

 Lars

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Re: [DRBD-user] DRBD 8.0 life cycle

[Paul D. O'Rorke]

Thanks Lars,


DRBD 9 does everything DRBD 8 does.
Some things it does better.
And it can do some things you may not (yet) need.


I went ahead and did the reading...  ;-)   I will move to DRBD9.


You can use DRBD 9 the same way you used DRBD 8, if you want to.
(some config options have been renamed, or moved to different sections)


I was very pleased to see how my current config will still work without 
having to revisit what I am doing.


You guys really are amazing with what you offer for free!  Thanks for 
the great work.  You have saved my bacon multiple times.


cheers

* Paul O'Rorke*
* Tracker Software Products (Canada) Limited *
www.tracker-software.com 
 Tel:  +1 (250) 324 1621
 Fax: +1 (250) 324 1623



 Support:
http://www.tracker-software.com/support 


 Download latest Releases
http://www.tracker-software.com/downloads/ 






On 2021-08-26 6:03 a.m., Lars Ellenberg wrote:

On Tue, Aug 03, 2021 at 03:34:58PM -0700, Paul D. O'Rorke wrote:

Hi all,

I have been running a DRDB-8 simple 3 node disaster recovery set up of
libvirt VMs for a number of years and have been very happy with it.   Our
needs are simple, 2 servers on Protocol C, each running a handful of VMs as
primary and replicated to the other, and both stacked to a third server via
protocol A for disaster recover/point in time backups (I run my nightly
backups off of the tertiary node so as to limit the impact on the two
primary servers.)

Now my hardware needs replacing and it looks like DRBD 8 is no longer
available?    We are not Amazon, we do not need a full cluster with all it's
bells and whistles, the classic DRBD8 three node setup still works for me.

My question is whether DRBD8 is still "supported"and whether there are good
reasons to move to DRBD9?

Depends on what you feel "supported" means.

As we put on our web page at https://linbit.com/solutions-rfq/
DRBD 8 < 8.4 is end of life.
DRBD 8.4 has left "active maintenance" years ago, but needs to be supported
while existing customers pay for existing deployments.  The "relevant" platform
here is RHEL 7, which ends its "Extended Lifecycle Support" in 2026,
so that's the end date for our 8.4 support as well.

For new deployments, or more recent Platforms (RHEL 8, etc),
Linbit does provide support for DBRD 9 or later.

DRBD 9 does everything DRBD 8 does.
Some things it does better.
And it can do some things you may not (yet) need.

You can use DRBD 9 the same way you used DRBD 8, if you want to.
(some config options have been renamed, or moved to different sections)

 Lars

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Re: [DRBD-user] DRBD 8.0 life cycle

[Michael Hierweck]

Hi Lars,

On 26.08.21 15:03, Lars Ellenberg wrote:


As we put on our web page at https://linbit.com/solutions-rfq/
DRBD 8 < 8.4 is end of life.
DRBD 8.4 has left "active maintenance" years ago, but needs to be supported
while existing customers pay for existing deployments.  The "relevant" platform
here is RHEL 7, which ends its "Extended Lifecycle Support" in 2026,
so that's the end date for our 8.4 support as well.


DRBD 8.4 (at least the kernel module) is part of the vanilla Linux kernel. Will DRBD be removed 
from the upstream kernel or replaced with DRBD 9.x? Is there any ongoing work/progress related 
to this?


Regards,

Michael
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Re: [DRBD-user] DRBD 8.0 life cycle

[Lars Ellenberg]

On Tue, Aug 03, 2021 at 03:34:58PM -0700, Paul D. O'Rorke wrote:
> Hi all,
> 
> I have been running a DRDB-8 simple 3 node disaster recovery set up of
> libvirt VMs for a number of years and have been very happy with it.   Our
> needs are simple, 2 servers on Protocol C, each running a handful of VMs as
> primary and replicated to the other, and both stacked to a third server via
> protocol A for disaster recover/point in time backups (I run my nightly
> backups off of the tertiary node so as to limit the impact on the two
> primary servers.)
> 
> Now my hardware needs replacing and it looks like DRBD 8 is no longer
> available?    We are not Amazon, we do not need a full cluster with all it's
> bells and whistles, the classic DRBD8 three node setup still works for me.
> 
> My question is whether DRBD8 is still "supported"and whether there are good
> reasons to move to DRBD9?

Depends on what you feel "supported" means.

As we put on our web page at https://linbit.com/solutions-rfq/
DRBD 8 < 8.4 is end of life.
DRBD 8.4 has left "active maintenance" years ago, but needs to be supported
while existing customers pay for existing deployments.  The "relevant" platform
here is RHEL 7, which ends its "Extended Lifecycle Support" in 2026,
so that's the end date for our 8.4 support as well.

For new deployments, or more recent Platforms (RHEL 8, etc),
Linbit does provide support for DBRD 9 or later.

DRBD 9 does everything DRBD 8 does.
Some things it does better.
And it can do some things you may not (yet) need.

You can use DRBD 9 the same way you used DRBD 8, if you want to.
(some config options have been renamed, or moved to different sections)

Lars

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