Switch from kube-dns to CoreDNS #71
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* Add system:coredns ClusterRole and binding * Annotate CoreDNS service for Prometheus metrics scraping * Remove kube-dns deployment, service, service account, and variables * Deprecate kube_dns_service_ip module output, use cluster_dns_service_ip instead
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* Add system:coredns ClusterRole and binding * Annotate CoreDNS for Prometheus metrics scraping * Remove kube-dns deployment, service, & service account * poseidon/terraform-render-bootstrap#71 * https://kubernetes.io/blog/2018/06/27/kubernetes-1.11-release-announcement/
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* Add system:coredns ClusterRole and binding * Annotate CoreDNS for Prometheus metrics scraping * Remove kube-dns deployment, service, & service account * poseidon/terraform-render-bootstrap#71 * https://kubernetes.io/blog/2018/06/27/kubernetes-1.11-release-announcement/
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* Add system:coredns ClusterRole and binding * Annotate CoreDNS for Prometheus metrics scraping * Remove kube-dns deployment, service, & service account * poseidon/terraform-render-bootstrap#71 * https://kubernetes.io/blog/2018/06/27/kubernetes-1.11-release-announcement/
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* Add system:coredns ClusterRole and binding * Annotate CoreDNS for Prometheus metrics scraping * Remove kube-dns deployment, service, & service account * poseidon/terraform-render-bootstrap#71 * https://kubernetes.io/blog/2018/06/27/kubernetes-1.11-release-announcement/
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* Add system:coredns ClusterRole and binding * Annotate CoreDNS for Prometheus metrics scraping * Remove kube-dns deployment, service, & service account * poseidon/terraform-render-bootstrap#71 * https://kubernetes.io/blog/2018/06/27/kubernetes-1.11-release-announcement/
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CoreDNS is DNS default addon since 1.11 [1][2]. The manifest files was taken from [3]. Fix #991 [1] https://kubernetes.io/blog/2018/06/27/kubernetes-1.11-release-announcement/ [2] https://github.com/kubernetes/kubernetes/blob/release-1.11/CHANGELOG-1.11.md#sig-cluster-lifecycle [3] poseidon/terraform-render-bootstrap#71
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* Add system:coredns ClusterRole and binding * Annotate CoreDNS for Prometheus metrics scraping * Remove kube-dns deployment, service, & service account * poseidon/terraform-render-bootstrap#71 * https://kubernetes.io/blog/2018/06/27/kubernetes-1.11-release-announcement/
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kube_dns_service_ipmodule output, usecluster_dns_service_ipinsteadNote: CoreDNS does not use a pod nanny. For large clusters (100+ nodes), either increase the replica count by hand or use a horizontal autoscaling addon https://kubernetes.io/docs/tasks/administer-cluster/dns-horizontal-autoscaling/