CoreDNS is not version tagged

[surajssd]

We deploy CoreDNS with latest tag and not with image tag. This was done for providing support of the ARM arch. But this needs to change and we need to find a way to pin down the version of CoreDNS.

lokomotive/assets/lokomotive-kubernetes/bootkube/variables.tf

Lines 81 to 96 in 2f92fbe

	variable "container_arch" {
	description = "Architecture suffix for the container image coredns/coredns:coredns- (e.g., arm64)"
	type = string
	default = "amd64"
	}
	variable "container_images" {
	description = "Container images to use (the coredns entry will get -$${var.container_arch} appended)"
	type = map(string)
	default = {
	calico = "calico/node:v3.13.3"
	calico_cni = "calico/cni:v3.13.3"
	calico_controllers = "calico/kube-controllers:v3.13.3"
	hyperkube = "k8s.gcr.io/hyperkube:v1.18.2"
	coredns = "coredns/coredns:coredns-"

Q: Why can't we rely on the ability of the docker daemon to identify the arch and pull the corresponding image?

You can find the various tags for CoreDNS https://hub.docker.com/r/coredns/coredns/tags