On 21.10.22 14:28, Kui Liu wrote:
     >      >      Ok - for the user space there are two options:
     >      >          1. add an argument to enable at creation time
     >      >          2. command standby_enable /if using the enable it is 
possible to
     >      >      implement a disable command too/.
     >      >
     >      >      I prefer the second approach but let's hear other opinions 
too.
     >      >      And yes we can possibly do both but is there a use case ?
     >      >
     >      > [LIU]: Since the static key is a global option, I also think the 
second approach is better.
     >      > In case of nodes with vStorage + ploop + iSCSI setup, we just 
need to enable the static
     >      > key early in system init or iSCSI service init.  I don't think it 
is necessary to implement both.
     >
     >      You are right. It will need at least one ploop device created to 
issue a
     >      device mapper command to enable standby. Would a module parameter 
work?
     >
     > [LIU] Yes, I think it is better to make the static key a module 
parameter.

     This rised a question - how and who will pass the module parameter when
     required ? How we will handle the existin users ? What do you think ?

[LIU]: Like add a conf file ploop.conf in /etc/modprobe.d or lib/modeprobe.d? 
This conf file can be shipped with the release image, or installed later.  Are 
you referring to VZ7 as existing users? I saw you also made the changes to VZ7, 
but I'm not sure whether it is necessary to backport these changes to VZ7.

Yes, VZ7 users - there are issues related to it so trying to fix them. the modprobe.d would do but do you have a package that can install the conf tied to the iSCSI target, so it gets installed only if the iSCSI is used ?

--
Regards,
Alexander Atanasov

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