[chef] Re: Ohai last modified timestamp

["Vauter, George" < >]

Thanks Daniel - this is great info!

- George

> On May 11, 2015, at 10:05 PM, Daniel DeLeo 
> <
 >
>  wrote:
> 
> 
> 
> On Monday, May 11, 2015 at 10:41 AM, Vauter, George wrote:
> 
>> Does anyone know if there is a parameter that indicates when an Ohai 
>> system profile was last modified? We are using Ohai data to feed an 
>> external CMDB system and would like to only trigger pushes if a Chef node 
>> has had a modification in its Ohai profile.
> 
> Ohai doesn’t keep any state about its previous run, and Chef Client 
> discards the data that’s on the server at the beginning of the run. You can 
> probably build something like this yourself by saving the ohai data to disk 
> (either in a Chef Client run or out of band), but beware that Ohai picks up 
> a lot of volatile data. A long while ago I wrote a tool to compare Ohai 
> output to a baseline for the purpose of detecting regressions in Ohai 
> itself, and I had to make a whitelist of all the volatile keys. You can see 
> the list of them here (I think these are still valid, but may not be 
> complete, especially on cloud platforms): 
> https://github.com/chef/ohai-verifier/blob/master/spec/regression_spec.rb#L64-L107
> 
> 
>> 
>> 
>> Thanks
>> George
> 
> HTH,
> 
> --  
> Daniel DeLeo
> 
> 
>