Terraform Kubernetes doesn't allow use of anything other than apiVersion: v1. However I wanted to work around that by using the null_resource provisioner to run kubectl apply -f ... and kubectl delete -f ... (with when = "destroy").
I've attempted to get this to work using the kubernetes apply EOF pattern, but haven't managed it just yet.
Here is where I've gotten to but it seems the | is an illegal char.
Also hoping I could pull the yaml string out into a multiline variable so I don't have to repeat it in the null resource.
resource "null_resource" "res_name" {
provisioner {
command = <<EOF | kubectl apply -f -
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: some-ingress-name
annotations:
kubernetes.io/ingress.class: nginx
spec:
rules:
- host: subdomain.example.com
http:
paths:
- backend:
serviceName: some-cluster-ip-service
servicePort: 80
}
provisioner {
when = "destroy"
command = <<EOF | kubectl delete -f -
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: some-ingress-name
annotations:
kubernetes.io/ingress.class: nginx
spec:
rules:
- host: subdomain.example.com
http:
paths:
- backend:
serviceName: some-cluster-ip-service
servicePort: 80
}
}
There were some bugs in your code.
EOF for the <<EOF ("here-doc" syntax)|) command. The local-exec provisioner runs the command in the local shell. Therefore use the <<EOF stdin trick from the Github issue comment. Thanks for the hint. Didn't know this, too.That code works on my side:
resource "null_resource" "res_name" {
provisioner "local-exec" {
command = "kubectl apply -f - <<EOF\n${var.ingress_yaml}\nEOF"
}
provisioner "local-exec" {
when = "destroy"
command = "kubectl delete -f - <<EOF\n${var.ingress_yaml}\nEOF"
}
}
variable "ingress_yaml" {
default = <<EOF
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: some-ingress-name
annotations:
kubernetes.io/ingress.class: nginx
spec:
rules:
- host: subdomain.example.com
http:
paths:
- backend:
serviceName: some-cluster-ip-service
servicePort: 80
EOF
}
I suggest to read in the YAML configuration from a file, instead. Then you can get YAML syntax highlighting and errors shown in your IDE. Use either
data "local_file" ordata "template_file", when you want to change something in the file.