[WIP] Add support for Hiera Hash resolution for recursive KV results

[fatmcgav]

I'm currently prototyping an internal usage for Consul's KV store to handle tiered data, in this case about our micro-services, and have a requirement to retrieve that data via Puppet and Hiera as a hash, which we can then manipulate down-stream.

Rather than reinvent the wheel, I thought I'd take a stab at adding Hash resolution support to hiera-consul.

It's very rough and ready atm, but given the following key structure:

• services
  • service1
    • context = 'service1s'
    • resource = 'service1'

And a query of service1, the following hash is returned:

{"services/service1/resource"=>"service1",
 "services/service1/"=>nil,
 "services/service1/context"=>"service1s"}

Things to work on/think about...

• How to handle directories? - Above, it's just 'nil'.
• Do we want to expose any of the other consul KV fields?
• Support for Hiera Array resolution?
• Testing?

Comments welcome...

Cheers
Gavin

[lynxman]

Really love this! Will work a bit more around it.

[fatmcgav]

Glad you like it...

It needs a bit more polish, but seems to work for my test cases...

I'm thinking it makes more sense to collapse out directories into named hash format, but could always work that into the consul_info function.

Cheers
Gav

[eric-aldinger]

I love this as well. I have the same use case and would prefer to have a normal JSON object returned, like I get from an API call to Consul. To make that work you could use a named hash, or add a different parser. I would vote for a different parser.

Our use case is "allowing the returning an object may allow for fewer expensive (timewise) API calls to Consul."