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Puppet 3 Cookbook

You're reading from   Puppet 3 Cookbook An essential book if you have responsibility for servers. Real-world examples and code will give you Puppet expertise, allowing more control over servers, cloud computing, and desktops. A time-saving, career-enhancing tutorial

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Product type Paperback
Published in Aug 2013
Publisher Packt
ISBN-13 9781782169765
Length 274 pages
Edition 2nd Edition
Languages
Tools
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Author (1):
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John Arundel John Arundel
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John Arundel
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Toc

Table of Contents (16) Chapters Close

Puppet 3 Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
1. Puppet Infrastructure 2. Puppet Language and Style FREE CHAPTER 3. Writing Better Manifests 4. Working with Files and Packages 5. Users and Virtual Resources 6. Applications 7. Servers and Cloud Infrastructure 8. External Tools and the Puppet Ecosystem 9. Monitoring, Reporting, and Troubleshooting Index

Logging command output


When you use the exec resources to run commands on the node, Puppet will give you an error message like the following if a command returns a non-zero exit status:

Notice: /Stage[main]//Node[cookbook]/Exec[this-will-fail]/returns: /bin/cat: /tmp/missing: No such file or directory
Error: /bin/cat /tmp/missing returned 1 instead of one of [0]

As you can see, Puppet not only reports that the command failed, but shows its output:

/bin/cat: /tmp/missing: No such file or directory

This is useful for figuring out why the command didn't work, but sometimes the command actually succeeds (in that it returns a zero exit status) but still doesn't do what we wanted. In that case, how can you see the command output? You can use the logoutput attribute.

How to do it…

Follow these steps in order to log command output:

  1. Define an exec resource with the logoutput parameter as shown in the following code snippet:

    exec { 'misbehaving-command':
      command   => '/bin/cat /etc/hostname',
     ...
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