Add support for MaxPodsConstraint in GKE

[andor44]

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Description

The cluster API now contains a field in beta to control the maximum number of pods per node. This changes the kubelet's --max-pods parameter, as well as the size of the subnet allocated to a node in Alias IP mode.

New or Affected Resource(s)

• google_container_cluster
• google_container_node_pool

Potential Terraform Configuration

resource "google_container_cluster" "cluster" {
  name = "foo"
  node_config {
    max_pods_per_node = 30
  }
}

resource "google_container_node_pool" "pool" {
  name = "my-pool"
  cluster = "${google_container_cluster.cluster.name}"
  max_pods_per_node = 40
}

Note

The API documentation is still missing this field for some reason, but the API reference has it already, as well as the CLI cluster creation reference, and node pool creation reference.

[nat-henderson]

Oh, cool, yesterday they regenerated the client libraries to contain this method, and this is doable now. :)

[mehemken]

If not set, does this default to zero?

[nat-henderson]

Yep! My understanding is that on the server side it defaults to "unset", which means no limit, and that sending a zero doesn't change that. There's some confusion on that point, though - to help, we've just merged a change that makes the field Computed, so that if it's set outside of Terraform, and set to zero or not set inside Terraform, it won't send an update request.

[ghost]

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