Setup dir rename.
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14
setup/cluster-services/externaldns/README.md
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14
setup/cluster-services/externaldns/README.md
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# External DNS
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See: https://github.com/kubernetes-sigs/external-dns
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ExternalDNS allows you to keep selected zones (via --domain-filter) synchronized with Ingresses and Services of type=LoadBalancer and nodes in various DNS providers.
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Currently, we are only configured to use CloudFlare.
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Docs: https://github.com/kubernetes-sigs/external-dns/blob/master/docs/tutorials/cloudflare.md
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Any Ingress that has metatdata.annotions with
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external-dns.alpha.kubernetes.io/hostname: `<something>.${DOMAIN}`
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will have Cloudflare records created by External DNS.
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60
setup/cluster-services/externaldns/install.sh
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60
setup/cluster-services/externaldns/install.sh
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#!/bin/bash
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set -e
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set -o pipefail
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# Initialize Wild-Cloud environment
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if [ -z "${WC_ROOT}" ]; then
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print "WC_ROOT is not set."
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exit 1
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else
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source "${WC_ROOT}/scripts/common.sh"
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init_wild_env
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fi
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CLUSTER_SETUP_DIR="${WC_HOME}/setup/cluster"
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EXTERNALDNS_DIR="${CLUSTER_SETUP_DIR}/externaldns"
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print_header "Setting up ExternalDNS"
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# Collect required configuration variables
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print_info "Collecting ExternalDNS configuration..."
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# Prompt for configuration using helper functions
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prompt_if_unset_config "cluster.externalDns.ownerId" "Enter ExternalDNS owner ID (unique identifier for this cluster)" "wild-cloud-$(hostname -s)"
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print_success "Configuration collected successfully"
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# Templates should already be compiled by wild-cluster-services-generate
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echo "Using pre-compiled ExternalDNS templates..."
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if [ ! -d "${EXTERNALDNS_DIR}/kustomize" ]; then
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echo "Error: Compiled templates not found. Run 'wild-cluster-services-generate' first."
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exit 1
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fi
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echo "Setting up ExternalDNS..."
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# Apply ExternalDNS manifests using kustomize
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echo "Deploying ExternalDNS..."
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kubectl apply -k ${EXTERNALDNS_DIR}/kustomize
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# Setup Cloudflare API token secret
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echo "Creating Cloudflare API token secret..."
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CLOUDFLARE_API_TOKEN=$(wild-secret cloudflare.token) || exit 1
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kubectl create secret generic cloudflare-api-token \
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--namespace externaldns \
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--from-literal=api-token="${CLOUDFLARE_API_TOKEN}" \
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--dry-run=client -o yaml | kubectl apply -f -
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# Wait for ExternalDNS to be ready
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echo "Waiting for Cloudflare ExternalDNS to be ready..."
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kubectl rollout status deployment/external-dns -n externaldns --timeout=60s
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# echo "Waiting for CoreDNS ExternalDNS to be ready..."
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# kubectl rollout status deployment/external-dns-coredns -n externaldns --timeout=60s
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echo "ExternalDNS setup complete!"
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echo ""
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echo "To verify the installation:"
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echo " kubectl get pods -n externaldns"
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echo " kubectl logs -n externaldns -l app=external-dns -f"
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echo " kubectl logs -n externaldns -l app=external-dns-coredns -f"
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---
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# CloudFlare provider for ExternalDNS
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: external-dns
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namespace: externaldns
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spec:
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selector:
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matchLabels:
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app: external-dns
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strategy:
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type: Recreate
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template:
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metadata:
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labels:
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app: external-dns
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spec:
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serviceAccountName: external-dns
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containers:
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- name: external-dns
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image: registry.k8s.io/external-dns/external-dns:v0.13.4
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args:
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- --source=service
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- --source=ingress
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- --txt-owner-id={{ .cluster.externalDns.ownerId }}
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- --provider=cloudflare
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- --domain-filter=payne.io
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#- --exclude-domains=internal.${DOMAIN}
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- --cloudflare-dns-records-per-page=5000
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- --publish-internal-services
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- --no-cloudflare-proxied
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- --log-level=debug
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env:
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- name: CF_API_TOKEN
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valueFrom:
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secretKeyRef:
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name: cloudflare-api-token
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key: api-token
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---
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# Common RBAC resources for all ExternalDNS deployments
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apiVersion: v1
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kind: ServiceAccount
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metadata:
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name: external-dns
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namespace: externaldns
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRole
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metadata:
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name: external-dns
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rules:
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- apiGroups: [""]
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resources: ["services", "endpoints", "pods"]
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verbs: ["get", "watch", "list"]
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- apiGroups: ["extensions", "networking.k8s.io"]
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resources: ["ingresses"]
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verbs: ["get", "watch", "list"]
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- apiGroups: [""]
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resources: ["nodes"]
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verbs: ["list"]
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRoleBinding
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metadata:
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name: external-dns-viewer
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roleRef:
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apiGroup: rbac.authorization.k8s.io
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kind: ClusterRole
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name: external-dns
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subjects:
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- kind: ServiceAccount
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name: external-dns
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namespace: externaldns
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apiVersion: kustomize.config.k8s.io/v1beta1
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kind: Kustomization
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resources:
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- namespace.yaml
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- externaldns-rbac.yaml
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- externaldns-cloudflare.yaml
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apiVersion: v1
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kind: Namespace
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metadata:
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name: externaldns
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