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I am trying to completely remove the grains from the system. I have one master and one minion setup(minion id= minion1). I am doing

salt minion1 grains.ls

that is listing me all the grains

Now I removed data.p which is the cache memory for the grains in master

path : /var/cache/salt/master/minions/minion1/data.p

Without running a salt_sync or any other command for sync I am again doing.

 `salt minion1 grains.ls`,

It's returning the same result.(The grains are still somewhere stored.

Where exactly it is storing the grains and how to delete that?

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1 Answer 1

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These are built-in grains, which are collected at minion startup. Here's the code responsible for generating them.

You cannot remove them, but you can overwrite them, for example to an empty value in /etc/salt/grains:

osfinger: null

or with grains execution module: salt minion1 grains.delval osfinger.

Keep in mind that some of the core grains are essential for the correct functioning of salt, e.g. module providers for pkg module rely on them.

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  • so there is no location as such of grains storage in minion and master.
    – Dheeraj Chelaramani
    Aug 3, 2018 at 7:12
  • Yes, there's only cache which you can clear with salt-run cache.clear_grains or sync grains with salt-run saltutil.sync_grains.
    – A. Z.
    Aug 3, 2018 at 8:04
  • I tried something: 1.Created some grains in minion 2 Synced the grains with the master 3 Cleared cache from the master 4 Then also it is showing the grains PS: This condition is after clearing cache and not syncing
    – Dheeraj Chelaramani
    Aug 3, 2018 at 9:09
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    Yes, the cache is just that, a cache. When the grains are needed, and they are not in cache, they will get synchronized automatically. It's impossible to remove core grains.
    – A. Z.
    Aug 3, 2018 at 9:15
  • I tried the same with custom grains but they are still present.
    – Dheeraj Chelaramani
    Aug 3, 2018 at 10:42

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