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Replace kube-dns with CoreDNS

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* Add system:coredns ClusterRole and binding
* Annotate CoreDNS for Prometheus metrics scraping
* Remove kube-dns deployment, service, & service account
* https://github.com/poseidon/terraform-render-bootkube/pull/71
* https://kubernetes.io/blog/2018/06/27/kubernetes-1.11-release-announcement/
This commit is contained in:
Dalton Hubble
2018-07-01 19:41:57 -07:00
parent ee31074679
commit 6f958d7577
34 changed files with 65 additions and 63 deletions
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2
digital-ocean/container-linux/kubernetes/bootkube.tf
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@ -1,6 +1,6 @@
# Self-hosted Kubernetes assets (kubeconfig, manifests)
module "bootkube" {
source = "git::https://github.com/poseidon/terraform-render-bootkube.git?ref=eb2dfa64de3f6c31bf5d2a8ca8912223ac1aef05"
source = "git::https://github.com/poseidon/terraform-render-bootkube.git?ref=81ba300e712e116c9ea9470ccdce7859fecc76b6"
cluster_name = "${var.cluster_name}"
api_servers = ["${format("%s.%s", var.cluster_name, var.dns_zone)}"]

4
digital-ocean/container-linux/kubernetes/variables.tf
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@ -80,7 +80,7 @@ variable "pod_cidr" {
variable "service_cidr" {
description = <<EOD
CIDR IPv4 range to assign Kubernetes services.
The 1st IP will be reserved for kube_apiserver, the 10th IP will be reserved for kube-dns.
The 1st IP will be reserved for kube_apiserver, the 10th IP will be reserved for coredns.
EOD
type = "string"
@ -88,7 +88,7 @@ EOD
}
variable "cluster_domain_suffix" {
description = "Queries for domains with the suffix will be answered by kube-dns. Default is cluster.local (e.g. foo.default.svc.cluster.local) "
description = "Queries for domains with the suffix will be answered by coredns. Default is cluster.local (e.g. foo.default.svc.cluster.local) "
type = "string"
default = "cluster.local"
}