exceptions, error, traces

[GRANIER Bernard (MORPHO)]

Hi,

Is there a tutorial on exceptions and error management in puppet script ?

 

I read the manual  and found information which is confusing for me.

 

There is the notify function which seems to be executed on agent.

 

There are functions like notice, alert, fail and so on which are executed on server.

 

And I read the ErrorLog word.

 

So how to put all things together, what is the right policy ?

 

Cordialement,

 

Bernard Granier

CE Plateforme Système

bernard...@morpho.com

01 58 11 32 51

 

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[Ellison Marks]

Notify is not a function. It is a resource type. It essentially logs on the client by putting a message in the client's catalog.

alert, crit, debug, emerg, err, info, notice and warning are functions. They will record a message to the server's log at the specified level. Parsing and execution will continue. I did not list the levels in any particular order.

fail is also a function. It is a way to programatically cause a parse failure. The error will be logged and execution on the current node will stop.

I'm not sure what you mean about ErrorLog. Where did you see it?

[GRANIER Bernard (MORPHO)]

Hi,

 

First, thanks for your answer.

 

I am not still aware of a deep understanding of differences between resources and functions, but some tests confirmed what you said.

 

A point, with my tests, notify messages are displayed in the reverse order they are written in manifest …

 

I understood that alert, crit, debug, emerg, err, info, notice are functions executed on server during parsing step; the documentation explains that, by default, messages are sent to syslog even if I did not find them.

 

Thanks for your details on fail function,  I did not understand clearly which effects this function has.

 

I found ErrorLog in learning puppet documentation, (Generated on October 24, 2012, from git revision 38e9e6c36310cb4895f51e180890cd3fbbbba28e) page 53/67 : this is a sample of an erb file.

 

Sincerly,

 

Bernard Granier

CE Plateforme Système

bernard...@morpho.com

01 58 11 32 51

 

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[Ellison Marks]

On Monday, January 21, 2013 12:47:12 AM UTC-8, bernard...@morpho.com wrote:

Hi,

 

First, thanks for your answer.

 

I am not still aware of a deep understanding of differences between resources and functions, but some tests confirmed what you said.

Let me put it this way: A resource manages something on the client. A collection of resources is compiled on the server and applied to the client. A function is run on the server and works on a manifest before it is compiled, sort of like preprocessing.

A point, with my tests, notify messages are displayed in the reverse order they are written in manifest …

Ordering isn't guaranteed to be anything. The nature of puppet manifests is not linear, it is declarative. That is, unless you explicitly specify dependencies with before/require parameters, or the -> operator, resources will get applied in any order they please.
 

I understood that alert, crit, debug, emerg, err, info, notice are functions executed on server during parsing step; the documentation explains that, by default, messages are sent to syslog even if I did not find them.

 

Thanks for your details on fail function,  I did not understand clearly which effects this function has.

 

I found ErrorLog in learning puppet documentation, (Generated on October 24, 2012, from git revision 38e9e6c36310cb4895f51e180890cd3fbbbba28e) page 53/67 : this is a sample of an erb file.

That may be referring to an apache directive. http://httpd.apache.org/docs/current/mod/core.html#errorlog
Does it make sense in that context?

[GRANIER Bernard (MORPHO)]

Hi,

 

A great thanks for your answer and for the apache link.

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