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Merge pull request #88 from commitdev/pull-in-improvements
Updated templates and code to reflect newest best state from aplayr a…
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143 changes: 143 additions & 0 deletions
143
templates/kubernetes/terraform/modules/kubernetes/external_dns.tf
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| # Trust relationship | ||
| data "aws_iam_policy_document" "external_dns_trust_relationship" { | ||
| statement { | ||
| actions = ["sts:AssumeRole"] | ||
|
|
||
| principals { | ||
| type = "Service" | ||
| identifiers = ["ec2.amazonaws.com"] | ||
| } | ||
| } | ||
|
|
||
| statement { | ||
| actions = ["sts:AssumeRole"] | ||
|
|
||
| principals { | ||
| type = "AWS" | ||
| identifiers = var.external_dns_assume_roles | ||
| } | ||
| } | ||
| } | ||
|
|
||
| # external-dns role | ||
| resource "aws_iam_role" "external_dns_role" { | ||
| name = "k8s-external-dns-role" | ||
| assume_role_policy = data.aws_iam_policy_document.external_dns_trust_relationship.json | ||
| } | ||
|
|
||
| data "aws_iam_policy_document" "external_dns_policy_doc" { | ||
| statement { | ||
| sid = "k8sExternalDnsRead" | ||
| effect = "Allow" | ||
|
|
||
| actions = [ | ||
| "route53:ListHostedZones", | ||
| "route53:ListResourceRecordSets", | ||
| ] | ||
|
|
||
| resources = ["*"] | ||
| } | ||
|
|
||
| statement { | ||
| sid = "k8sExternalDnsWrite" | ||
| effect = "Allow" | ||
|
|
||
| actions = ["route53:ChangeResourceRecordSets"] | ||
|
|
||
| resources = ["arn:aws:route53:::hostedzone/*"] | ||
| } | ||
| } | ||
|
|
||
| resource "aws_iam_role_policy" "external_dns_policy" { | ||
| name = "k8s-external-dns-policy" | ||
| role = aws_iam_role.external_dns_role.id | ||
| policy = data.aws_iam_policy_document.external_dns_policy_doc.json | ||
| } | ||
|
|
||
| resource "kubernetes_service_account" "external_dns" { | ||
| metadata { | ||
| name = "external-dns" | ||
| namespace = "kube-system" | ||
| } | ||
| } | ||
|
|
||
| resource "kubernetes_cluster_role" "external_dns" { | ||
| metadata { | ||
| name = "external-dns" | ||
| } | ||
| rule { | ||
| verbs = ["get", "list", "watch"] | ||
| api_groups = [""] | ||
| resources = ["pods", "services"] | ||
| } | ||
| rule { | ||
| verbs = ["get", "list", "watch"] | ||
| api_groups = ["extensions"] | ||
| resources = ["ingresses"] | ||
| } | ||
| rule { | ||
| verbs = ["list"] | ||
| api_groups = [""] | ||
| resources = ["nodes"] | ||
| } | ||
| } | ||
|
|
||
| resource "kubernetes_cluster_role_binding" "external_dns" { | ||
| metadata { | ||
| name = "external-dns" | ||
| } | ||
| subject { | ||
| kind = "ServiceAccount" | ||
| name = "external-dns" | ||
| namespace = "kube-system" | ||
| } | ||
| role_ref { | ||
| api_group = "rbac.authorization.k8s.io" | ||
| kind = "ClusterRole" | ||
| name = "external-dns" | ||
| } | ||
| } | ||
|
|
||
| resource "kubernetes_deployment" "external_dns" { | ||
| metadata { | ||
| name = "external-dns" | ||
| namespace = "kube-system" | ||
| } | ||
| spec { | ||
| replicas = 1 | ||
| selector { | ||
| match_labels = { | ||
| "app" = "external-dns", | ||
| } | ||
| } | ||
| template { | ||
| metadata { | ||
| labels = { | ||
| "app" = "external-dns", | ||
| } | ||
| annotations = { | ||
| "iam.amazonaws.com/role" = "k8s-external-dns-role", | ||
| } | ||
| } | ||
| spec { | ||
| container { | ||
| name = "external-dns" | ||
| image = "registry.opensource.zalan.do/teapot/external-dns:latest" | ||
| args = [ | ||
| "--source=service", | ||
| "--source=ingress", | ||
| "--domain-filter=${var.external_dns_zone}", # Give access only to the specified zone | ||
| "--provider=aws", | ||
| "--aws-zone-type=public", | ||
| "--policy=upsert-only", # Prevent ExternalDNS from deleting any records | ||
| "--registry=txt", | ||
| "--txt-owner-id=${var.external_dns_owner_id}", # ID of txt record to manage state | ||
| ] | ||
| } | ||
|
|
||
| service_account_name = "external-dns" | ||
| automount_service_account_token = true | ||
| } | ||
| } | ||
| } | ||
| } |
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