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Update Prometheus discovery of kube components

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* Kubernetes v1.22.0 disabled kube-controller-manager insecure
port, which was used internally for Prometheus metrics scraping
* Configure Prometheus to discover and scrape endpoints for
kube-scheduler and kube-controller-manager via the authenticated
https ports, via bearer token
* Change firewall ports to allow Prometheus (on worker nodes)
to scrape kube-scheduler and kube-controller-manager targets
that run on controller(s) with hostNetwork
* Disable the insecure port on kube-scheduler
This commit is contained in:
Dalton Hubble
2021-08-10 21:08:49 -07:00
parent 0c99b909a9
commit cbef202eec
22 changed files with 74 additions and 34 deletions
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2
digital-ocean/flatcar-linux/kubernetes/bootstrap.tf
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@ -1,6 +1,6 @@
# Kubernetes assets (kubeconfig, manifests)
module "bootstrap" {
source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=b766ff2346921a4f5587a45b948b5c79969357ae"
source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=b5f5d843ec9babcd2eeea98b8edcef972a5c178d"
cluster_name = var.cluster_name
api_servers = [format("%s.%s", var.cluster_name, var.dns_zone)]

2
digital-ocean/flatcar-linux/kubernetes/network.tf
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@ -116,7 +116,7 @@ resource "digitalocean_firewall" "controllers" {
# kube-scheduler metrics, kube-controller-manager metrics
inbound_rule {
protocol = "tcp"
port_range = "10251-10252"
port_range = "10257-10259"
source_tags = [digitalocean_tag.workers.name]
}
}