[Samba] setlmasterrole in config

[Robert Buck]

Hi Jeremy, and Martin,

Digging in the code I think I figured it out (though untested). Here is my
Ansible fragment. Is this correct for the property names?

...
[legacy]
realtime scheduling = false
{% if ctdb_lmaster_capability is defined %}
lmaster capability = {{ ctdb_lmaster_capability }}
{% endif %}
{% if ctdb_recmaster_capability is defined %}
recmaster capability = {{ ctdb_recmaster_capability }}
{% endif %}
...

Thanks


On Thu, Oct 15, 2020 at 1:09 PM Jeremy Allison <jra at samba.org> wrote:

> On Thu, Oct 15, 2020 at 09:01:01AM -0400, Robert Buck via samba wrote:
> > Can someone please respond to this question? We're unsure how to
> > persistently set these flags, which are VERY useful for performance from
> > what we see. We want to ensure that after reboot, particular nodes are
> > always set on (or others off).
>
> From the ctdb/doc/ctdb.1.xml man page file:
>
>     <refsect2>
>       <title>setlmasterrole on|off</title>
>       <para>
>         This command is used to enable/disable the LMASTER capability for
> a node at runtime. This capability determines whether or not a node can be
> used as an LM
>       </para>
>
>       <para>
>         Nodes will by default have this capability, but it can be stripped
> off nodes by the setting in the sysconfig file or by using this command.
>       </para>
>
> So looks like setting the ctdb sysconfig file would be the
> way to go. Hopefully Martin or Amitay can confirm and give
> a more complete explaination.
>
> > On Mon, Oct 12, 2020 at 7:00 PM Robert Buck <robert.buck at som.com> wrote:
> >
> > > How can setlmasterrole be set persistently? Is there a way to put it in
> > > some config file?
> > >
> > > If not, if setting it from the command line is the only option, what is
> > > the recommended approach to ensure it is set upon reboot?
> > >
> > > Thx
> > >
> > > --
> > >
> > > BOB BUCK
> > > SENIOR PLATFORM SOFTWARE ENGINEER
> > >
> > > SKIDMORE, OWINGS & MERRILL
> > > 7 WORLD TRADE CENTER
> > > 250 GREENWICH STREET
> > > NEW YORK, NY 10007
> > > T  (212) 298-9624
> > > ROBERT.BUCK at SOM.COM
> > >
> >
> >
> > --
> >
> > BOB BUCK
> > SENIOR PLATFORM SOFTWARE ENGINEER
> >
> > SKIDMORE, OWINGS & MERRILL
> > 7 WORLD TRADE CENTER
> > 250 GREENWICH STREET
> > NEW YORK, NY 10007
> > T  (212) 298-9624
> > ROBERT.BUCK at SOM.COM
> > --
> > To unsubscribe from this list go to the following URL and read the
> > instructions:  https://lists.samba.org/mailman/options/samba
>
>

-- 

BOB BUCK
SENIOR PLATFORM SOFTWARE ENGINEER

SKIDMORE, OWINGS & MERRILL
7 WORLD TRADE CENTER
250 GREENWICH STREET
NEW YORK, NY 10007
T  (212) 298-9624
ROBERT.BUCK at SOM.COM