On Thursday, May 1, 2014 6:07:29 AM UTC-6, Matthew Burgess wrote:
>
> Hi all,
>
> This, to me, is really bizarre. Here's my code:
>
> Facter.add("hostname_app") do
> setcode do
> hostname_app = Facter.value(:hostname)
> hostname_app[5] = 'a'
> hostname_app
> end
> end
>
> Basically, our servers have 2 network cards, and we need to set up DNS for
> both of its IP addresses. eth0 & the server's hostname is its 'management'
> name, and eth1 is the server's 'application'/business network.
>
> The management hostname and application hostname only differ by one
> letter, which is what the above code is changing.
>
> Now, when this runs, the hostname_app fact is set correctly, but the
> default hostname fact is also changed similarly! How on earth is that
> happening?
>
> I've confirmed that a normal 'facter' run has the correct hostname set,
> and removing this custom fact also keeps the hostname fact correct under a
> 'facter -p' run. However, with this fact in place a 'facter -p' run shows
> the incorrect hostname fact!
>
> Thanks,
>
> Matt.
>
I too get this on Facter 2.x and ruby 2.1.x. It seems to be returning the
value as a reference instead of a copy. If you make an explicit copy of the
variable using something like Facter.value(:whatever).lstrip (the lstrip
produces a copy of the string) it seems to work fine. It might be worth
opening a jira ticket for this if you can't find out, as this seems
really... wrong.
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