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\n\n# ExternalDNS Helm Chart\n\nExternalDNS synchronizes exposed Kubernetes Services and Ingresses with DNS providers. The ExternalDNS Helm chart automates deployment and configuration of ExternalDNS in Kubernetes clusters using the Minimus ExternalDNS image.\n\n \n## {{icon-list-search}} Prerequisites\n\n- A subscription to the Minimus images included in the chart\n- A running Kubernetes cluster (v1.21 or higher is recommended)\n- `kubectl` installed and configured\n- Helm v3.8 or higher for OCI support ([Installation instructions](https://helm.sh/docs/intro/install/))\n- Cluster Admin privileges\n\n**Note**: ExternalDNS requires access to a DNS provider (AWS Route53, Google Cloud DNS, Azure DNS, Cloudflare, etc.) to manage DNS records. For testing without a real DNS provider, you can use the `inmemory` provider by overriding the chart defaults (see Step 3).\n\n

\n\n---\n\n

\n \n## {{icon-rocket}}Try It Out\n\nIn this example we will deploy ExternalDNS on a Kubernetes cluster using the Minimus ExternalDNS Helm chart. ExternalDNS will automatically create and manage DNS records for your Kubernetes Services and Ingresses.\n\n

\n\n### Step 1: Start Cluster\n\n

\n\nIf you have a cluster to work with, skip this step. Otherwise, start a Minikube cluster. [Deployment instructions](https://minikube.sigs.k8s.io/docs/start/?arch=%2Flinux%2Fx86-64%2Fstable%2Fbinary+download)\n\n

\n\n### Step 2: Create Namespace\n\n

\n\nCreate a namespace:\n\n```\nkubectl create ns external-dns\n```\n\n{{if-enterprise}}\n\nNext, create a Kubernetes secret for the Minimus token:\n\n```\nkubectl create secret docker-registry minimus-registry \\\n --docker-server=reg.mini.dev \\\n --docker-username=minimus \\\n --docker-password={{pull-token}} \\\n --namespace=external-dns\n```\n\n{{/if-enterprise}}\n\n

\n\n### Step 3: Deploy the Helm Chart\n\n

\n\nDeploy the Minimus Helm chart:\n\n```\nhelm install my-external-dns {{oci-url}} \\\n --version {{chart-version}} \\\n -n external-dns \\\n --wait\n```\n\nIf you want to override the chart's defaults, go to the Values tab, save a copy locally with your changes. Deploy the chart with your overrides using `-f values.yaml`:\n\n```\nhelm install my-external-dns {{oci-url}} \\\n --version {{chart-version}} \\\n -f values.yaml \\\n -n external-dns \\\n --wait\n```\n\nFor testing with the inmemory provider (no real DNS provider required), create a `values.yaml` with:\n\n```yaml\nexternal-dns:\n provider:\n name: inmemory\n txtOwnerId: external-dns-test\n interval: 5s\n domainFilters:\n - internal.example.org\n```\n\n

\n\n### Step 4: Verify ExternalDNS is Running\n\n

\n\nConfirm the chart deployed successfully and ExternalDNS started:\n\n```\nkubectl get pods -n external-dns\n```\n\nYou should see output similar to:\n\n```\nNAME READY STATUS RESTARTS AGE\nmy-external-dns-xxxxxxxxx-xxxxx 1/1 Running 0 2m\n```\n\n

\n\n### Step 5: Test Health Endpoint\n\n

\n\nPort-forward to the ExternalDNS service and verify the health endpoint responds:\n\n```\nkubectl port-forward svc/my-external-dns -n external-dns 7979:7979\n```\n\nIn a separate terminal, test the health endpoint:\n\n```\ncurl -sf http://localhost:7979/healthz && echo \"ExternalDNS is healthy\"\n```\n\nYou should see:\n\n```\nExternalDNS is healthy\n```\n\n

\n\n### Step 6: Clean Up\n\n

\n\nUninstall the chart and delete the namespace to remove all resources:\n\n```bash\nhelm uninstall my-external-dns -n external-dns\nkubectl delete namespace external-dns\n```\n\n

\n\n\n---\n\n

\n\n## {{icon-info-circle}}Terms & Info\n\n

\n\n### Trademark\n\n

\n\nThis catalog is published by Minimus. All product names, logos, and marks, other than those belonging to Minimus, shown are owned by their respective rights holders and appear here only to identify the open source software each image contains. Minimus claims no ownership of those marks and implies no affiliation with, endorsement by, certification by, or sponsorship by any rights holder.\n\n\n{{if-anonymous}} \n\n

\n\n### Disclaimer\n\n

\n\n\nImages are provided \"as-is\" without warranty of any kind. \"Hardened\" refers to the security configuration applied at the time of build and does not constitute a guarantee of ongoing security or absence of vulnerabilities. The free tier is provided without support, SLA, or guaranteed patching timelines. Security updates may be applied to paid subscriptions before or instead of free tier images. By pulling or using any image you agree to our [Terms of Use](https://www.minimus.io/terms-of-use).\n\n{{/if-anonymous}}\n\n\n

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