Accessing Nested Maps

[Matthew Ceroni]

I have the following structure

  workers =

  [

    {

      auto_scaling.min     = "1"

      auto_scaling.max     = "6"

      auto_scaling.desired = "1"

      labels = {

        namespace = "default"

        role             = "testing"

      }

    }

  ]

As you can see, I have an array of maps with two nested maps inside. The first being auto_scaling. After some googling I found the . trick such that I could do ${lookup(var.workers[count.index], "auto_scaling.min")} to return the value vs trying to do two lookups which doesn't work as lookup only works with flat items.

However, that above trick doesn't work for the labels component because I need to be able to access the map as a whole to pass it to jsonencode. I have tried various things but haven't found a solution yet so wondering if anyone else out there can think outside the box and come up with a solution.

The above variable is actually used to spin up different Auto-Scaling groups and the labels are then passed into as user data such that during provisioning the node can be labled with those labels (kubernetes nodes).

Thanks

[Anshu Prateek]

Maybe define flat maps first and then create nested map at runtime ?

something like:

workers = ["${merge("${var.map_1}","${map("labels","${var.map_2}")}")}"]

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regards
Anshu Prateek
+91.991.610.2967

[Anshu Prateek]

terraform console
> var.map_1
{
  auto_scaling.max = 6  auto_scaling.min = 1}
> var.map_2

{
  namespace = default  role = testing}

> "${merge("${var.map_1}","${map("labels","${var.map_2}")}")}"

{
  auto_scaling.max = 6  auto_scaling.min = 1  labels = {    namespace = default  role = testing}}
>