Terraform: Need way to interpolate count index as other than zero-based (for host names)
Around our shop, server names with numbers are done one-based.
Since the only way, in a counted resource, to interpolate a ${count.index} is zero-based, this causes annoying zero-based server names.
IWBNI there were either another "part" for count, say index1, or a way to specify an offset such as indexplus 1 or a way to nest those references and an "add" interpolation. Something, anything, please.
ecweaver
All 7 comments
Hm, I think we probably need to introduce basic math into our interpolation language or something...
mitchellh
on 16 Dec 2014
It would be very helpful if terraform supported basic math feature or index1 feature.
tkak
on 16 Jan 2015
@tkak It is coming )
mitchellh
on 16 Jan 2015
Done. We added math support in for int types so you can do things like ${count.index+1} now.
mitchellh
on 27 Feb 2015
I think there might be a related issue for this, but what about left padding a number to a certain number of digits so you can use the count to create server names like server-01, server-02, etc.?
jimmycuadra
on 28 Feb 2015
@jimmycuadra There is a sprintf-style issue on page 1 somewhere. :)
mitchellh
on 28 Feb 2015
I'm going to lock this issue because it has been closed for _30 days_ ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.
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hashibot[bot]
on 4 May 2020
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Most helpful comment
I think there might be a related issue for this, but what about left padding a number to a certain number of digits so you can use the count to create server names like server-01, server-02, etc.?