Add external-dns image.

README.md

@@ -15,6 +15,7 @@
 | [dotnet-sdk](./images/dotnet-sdk) | `cgr.dev/chainguard/dotnet-sdk` | experimental | [![](https://storage.googleapis.com/chainguard-images-build-outputs/badges/dotnet-sdk.build.status.latest-dev.svg)](https://registry-ui.chainguard.app/?image=cgr.dev/chainguard/dotnet-sdk:latest-dev)<br/>[![](https://storage.googleapis.com/chainguard-images-build-outputs/badges/dotnet-sdk.build.status.latest.svg)](https://registry-ui.chainguard.app/?image=cgr.dev/chainguard/dotnet-sdk:latest) |
 | [envoy](./images/envoy) | `cgr.dev/chainguard/envoy` | experimental | [![](https://storage.googleapis.com/chainguard-images-build-outputs/badges/envoy.build.status.latest.svg)](https://registry-ui.chainguard.app/?image=cgr.dev/chainguard/envoy:latest) |
 | [etcd](./images/etcd) | `cgr.dev/chainguard/etcd` | experimental | [![](https://storage.googleapis.com/chainguard-images-build-outputs/badges/etcd.build.status.latest.svg)](https://registry-ui.chainguard.app/?image=cgr.dev/chainguard/etcd:latest) |
+| [external-dns](./images/external-dns) | `cgr.dev/chainguard/external-dns` | experimental | [![](https://storage.googleapis.com/chainguard-images-build-outputs/badges/external-dns.build.status.latest-dev.svg)](https://registry-ui.chainguard.app/?image=cgr.dev/chainguard/external-dns:latest-dev)<br/>[![](https://storage.googleapis.com/chainguard-images-build-outputs/badges/external-dns.build.status.latest.svg)](https://registry-ui.chainguard.app/?image=cgr.dev/chainguard/external-dns:latest) |
 | [fluent-bit](./images/fluent-bit) | `cgr.dev/chainguard/fluent-bit` | experimental | [![](https://storage.googleapis.com/chainguard-images-build-outputs/badges/fluent-bit.build.status.latest.svg)](https://registry-ui.chainguard.app/?image=cgr.dev/chainguard/fluent-bit:latest) |
 | [fluentd](./images/fluentd) | `cgr.dev/chainguard/fluentd` | experimental | [![](https://storage.googleapis.com/chainguard-images-build-outputs/badges/fluentd.build.status.edge-dev.svg)](https://registry-ui.chainguard.app/?image=cgr.dev/chainguard/fluentd:edge-dev)<br/>[![](https://storage.googleapis.com/chainguard-images-build-outputs/badges/fluentd.build.status.edge.svg)](https://registry-ui.chainguard.app/?image=cgr.dev/chainguard/fluentd:edge)<br/>[![](https://storage.googleapis.com/chainguard-images-build-outputs/badges/fluentd.build.status.latest-dev.svg)](https://registry-ui.chainguard.app/?image=cgr.dev/chainguard/fluentd:latest-dev)<br/>[![](https://storage.googleapis.com/chainguard-images-build-outputs/badges/fluentd.build.status.latest.svg)](https://registry-ui.chainguard.app/?image=cgr.dev/chainguard/fluentd:latest) |
 | [gcc-glibc](./images/gcc-glibc) | `cgr.dev/chainguard/gcc-glibc` | stable | [![](https://storage.googleapis.com/chainguard-images-build-outputs/badges/gcc-glibc.build.status.latest.svg)](https://registry-ui.chainguard.app/?image=cgr.dev/chainguard/gcc-glibc:latest) |

images/external-dns/README.md

@@ -0,0 +1,48 @@
+<!--monopod:start-->
+# external-dns
+| | |
+| - | - |
+| **Status** | experimental |
+| **OCI Reference** | `cgr.dev/chainguard/external-dns` |
+| **Variants/Tags** | ![](https://storage.googleapis.com/chainguard-images-build-outputs/summary/external-dns.svg) |
+
+*[Contact Chainguard](https://www.chainguard.dev/chainguard-images) for enterprise support, SLAs, and access to older tags.*
+
+---
+<!--monopod:end-->
+
+Minimal image with Kubernetes External DNS. **EXPERIMENTAL**
+
+## Get It!
+
+The image is available on `cgr.dev`:
+
+```
+docker pull cgr.dev/chainguard/external-dns:latest
+```
+
+## Using External DNS
+
+The Chainguard External DNS image is a drop-in replacement for the upstream image.
+See the [upstream documentation](https://github.com/kubernetes-sigs/external-dns) for usage information specific to your environment.
+
+```shell
+$ docker run cgr.dev/chainguard/external-dns
+usage: external-dns --source=source --provider=provider [<flags>]
+
+ExternalDNS synchronizes exposed Kubernetes Services and Ingresses with DNS
+providers.
+
+Note that all flags may be replaced with env vars - `--flag` ->
+`EXTERNAL_DNS_FLAG=1` or `--flag value` -> `EXTERNAL_DNS_FLAG=value`
+
+Flags:
+  --help                         Show context-sensitive help (also try
+                                 --help-long and --help-man).
+  --version                      Show application version.
+  --server=""                    The Kubernetes API server to connect to
+                                 (default: auto-detect)
+  --kubeconfig=""                Retrieve target cluster configuration from
+                                 a Kubernetes configuration file (default:
+                                 auto-detect)
+```

images/external-dns/configs/latest.apko.yaml

@@ -0,0 +1,32 @@
+contents:
+  repositories:
+    - https://packages.wolfi.dev/os
+  keyring:
+    - https://packages.wolfi.dev/os/wolfi-signing.rsa.pub
+  packages:
+    - ca-certificates-bundle
+    - wolfi-baselayout
+    - external-dns
+
+accounts:
+  groups:
+    - groupname: external-dns
+      gid: 65532
+  users:
+    - username: external-dns
+      uid: 65532
+  run-as: external-dns
+  recursive: true
+
+entrypoint:
+  command: /usr/bin/external-dns
+cmd: --help
+
+archs:
+  - x86_64
+  - aarch64
+
+annotations:
+  "org.opencontainers.image.authors": "Chainguard Team https://www.chainguard.dev/"
+  "org.opencontainers.image.url": https://edu.chainguard.dev/chainguard/chainguard-images/reference/external-dns/
+  "org.opencontainers.image.source": https://github.com/chainguard-images/images/tree/main/images/external-dns

images/external-dns/image.yaml

@@ -0,0 +1,10 @@
+status: experimental
+versions:
+  - apko:
+      config: configs/latest.apko.yaml
+      extractTagsFrom:
+        package: external-dns
+      subvariants:
+        - suffix: -dev
+          options:
+            - dev

images/external-dns/tests/01-version.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+set -o errexit -o nounset -o errtrace -o pipefail -x
+
+IMAGE_DIR="$(basename "$(cd "$(dirname ${BASH_SOURCE[0]})/.." && pwd )")"
+IMAGE_NAME=${IMAGE_NAME:-"cgr.dev/chainguard/${IMAGE_DIR}:latest"}
+
+docker run --rm "${IMAGE_NAME}" --version