how to clear unnecessary minion cache

[Tao Fan]

Hi all,

I have been experimenting Salt and put a lot of stuff in master file_roots/. Now I have deleted most of them but found they are still in minion cache/salt/minion/files/base/. I would like to know if minion is able to sync with master file_root and automatically delete the files/directories that is not on master? I don't want to do this manually, especially when having a whole bunch of minions.

Thanks in advance.

Tao

[Tao Fan]

Just like to add that the stuff I put and deleted in master file_roots/ were not just sls files, but also source dir/files as well.

[Ethan Erchinger]

# salt '*' cmd.run 'rm -rm /var/cache/salt/minion/files/base/*'

# salt '*' saltutil.sync_all

[Tao Fan]

Hi Ethan,

Thanks for the response. I want to remove only the unnecessary files while keeping the others, because my minions have limited resources (limited hard drive space and CPU/memory) and are deployed remotely on 3G connection (unstable link, expensive and limited bandwidth). Also it would be good for future when I have some files pushed out but realise unnecessary.

But if there is no such a smart way. Your commands are the best bet for me.

Thanks.

Tao

--

Tao Fan

Taggle Systems Pty Ltd

(w) +61 2 8999 1919 (f) +61 2 9310 7232

Suite 201, National Innovation Centre, Australian Technology Park

4 Cornwallis Street, Eveleigh, NSW 2015 Australia

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[Erik Johnson]

This would require a runner or module execution function to be added. It's definitely doable. I opened an issue on the tracker: https://github.com/saltstack/salt/issues/6759

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[Ethan Erchinger]

Try something like this...works in my testing.

{% set base = '/var/cache/salt/minion/files/base' %}

{% set files = salt['cmd.run']('cd /var/cache/salt/minion/files/base; find * -type f') %}

{% set basefiles = salt['cp.list_master']() %}

{% for file in files.split() %}

  {% if file not in basefiles %}

{{ base }}/{{ file}}:

    file.absent

  {% endif %}

{% endfor %}

[Tao Fan]

Hi Ethan,

I am not as far as this complexity yet in my experimenting of salt but I will definitely try this after I understand how pillar and jinja works.

It seems your snippet deals with files only (salt['cmd.run']('cd /var/cache/salt/minion/files/base; find * -type f'). It should not be too hard to modify it to deal with directories as well.

Thank for your reply,

Tao 

--

Tao Fan

Taggle Systems Pty Ltd

(w) +61 2 8999 1919 (f) +61 2 9310 7232

Suite 201, National Innovation Centre, Australian Technology Park

4 Cornwallis Street, Eveleigh, NSW 2015 Australia