Re: Creating partitions/vgs/lvms

"'Vratislav Podzimek' via help-cfengine" <[email protected]> Wed, 17 Nov 2021 09:51:43 +0100

Newsgroups	gmane.comp.sysutils.cfengine.general
Message-ID	<[email protected]>

On Tue, 2021-11-16 at 13:20 +0100, Stefan Skoglund wrote:
> tis 2021-11-16 klockan 03:41 -0800 skrev Murray Collier:
> > Hi,
> > I am struggling to find an obvious way to work with partions and lvm
> > in cfengine. Is this possible within cfengine?
Not in any easy/nice way, unfortunately.

> > 
> > Thanks,
> > Murray.
> 
> lvm itself can export information as json (and then convert that into
> an data container and do decisions after that.)
Yes, that's possible.

But I would encourage you to look at the Custom promise types functionality [1] availble in the
recent versions of CFEngine. Writing a custom promise module working with LVM will definitely be
easier than doing a lot of JSON data manipulation in CFEngine policy and using lots of 'commands'
promises. Especially if you use things like libblockdev [2] or blivet [3]. It would be great to have
a 'block_device' promise type implemented as a custom promise type! (I could help a lot with its
development, I believe).

[1] https://docs.cfengine.com/docs/master/reference-promise-types-custom.html
[2] https://github.com/storaged-project/libblockdev
[3] https://github.com/storaged-project/blivet

--
Vratislav

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