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How to use http:// source for file?

asked 2013-10-08 11:30:21 -0600

parkan gravatar image

I'm trying to use a remote HTTP hosted file (vs local puppet:// url) as a source for one of my resources, but this doesn't seem to be supported by puppet.

Ideally, the behavior would be like this:

  • If file does not exist on master, download it
  • If it exists, make a HEAD request the HTTP URL to get Last-Modified/ETag headers and compare to known version (or check filesize, download + diff, etc), download if different
  • Deploy as normal

Specific use case would be to continuously deploy the mongodb MMS agent, which is updated frequently and is always served ... (more)

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I realize it can be a poor practice to blindly push binary updates to live, but the tradeoff for certain non-essential infrastructure seems firmly in favor of automation. Please correct ...(more)

parkan gravatar imageparkan ( 2013-10-08 11:32:19 -0600 )edit

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answered 2013-10-08 13:49:22 -0600

Stefan gravatar image

You cannot specify a HTTP URL as a file source and even if puppet supported that, it would require all your agents to be able to access the URL (e.g. require internet access).

Your request can be solved by writing a custom function (functions are always executed on your puppet master) and do something like this

file { 'some_file':
  content => download_content('')

with download_content beeing a custom function that downloads the software to a local caching directory and then reads the content of the file. But personally I would not do that, because an update might ... (more)

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Thanks, custom function seems like the right solution in our case ("build from nov 6th" is sufficient version information)

parkan gravatar imageparkan ( 2013-10-08 14:29:24 -0600 )edit

answered 2013-10-09 03:37:52 -0600

There are several puppet modules on puppet-forge and on github. You can find them by searching on puppet forge for wget or download keywords. There are also modules that can download and unpack archives (zip,tar).

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Asked: 2013-10-08 11:30:21 -0600

Seen: 16,830 times

Last updated: Oct 09 '13