Skip to content

Instantly share code, notes, and snippets.

@klpx
Created December 21, 2022 15:47
Show Gist options
  • Save klpx/3b4ff31eb3a55b3305b31dfb9211dc87 to your computer and use it in GitHub Desktop.
Save klpx/3b4ff31eb3a55b3305b31dfb9211dc87 to your computer and use it in GitHub Desktop.
Terraform script to breakdown kube config into specific configs to use each in its directory using direnv
# Put this script in `~/.kube/` directory
# > terraform init
# > terraform apply
locals {
# preferences
context2nicename_preference = {
"long-cluster-main" = "longcl"
}
# Directory in which a directory is created for each context from .kube/config
# Then in those directories, an .envrc file is created to use specific config
kubecontext_dir = "/home/user/kubernetes"
}
data "local_file" "mainconfig" {
filename = "./config"
}
locals {
mainconfig = yamldecode(data.local_file.mainconfig.content)
clusters = {for cl in local.mainconfig["clusters"]: cl["name"] => cl["cluster"]}
users = {for us in local.mainconfig["users"]: us["name"] => us["user"]}
context2nicename = {
for context in local.mainconfig["contexts"]:
context["name"] => lookup(local.context2nicename_preference, context["name"], regex("^(?:arn:aws:eks:.*:\\d+:cluster/)?(.+)$", context["name"])[0])
}
context2filename = {
for context in local.mainconfig["contexts"]:
context["name"] => "_config_${local.context2nicename[context["name"]]}"
}
contexts = {for context in local.mainconfig["contexts"]:
context["name"] => {
apiVersion = "v1"
kind = "Config"
contexts = [
context
]
current-context = context["name"]
preferences = {}
clusters = [
{
name = context["context"]["cluster"]
cluster = local.clusters[context["context"]["cluster"]]
}
]
users = [
{
name = context["context"]["user"]
user = local.users[context["context"]["user"]]
}
]
}
}
}
resource "local_file" "specific_config" {
for_each = local.contexts
filename = local.context2filename[each.key]
content = yamlencode(each.value)
}
resource "local_file" "envrc" {
for_each = local.context2nicename
filename = "${local.kubecontext_dir}/${each.value}/.envrc"
content = "export KUBECONFIG=~/.kube/${local.context2filename[each.key]}"
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment