From 06f67278ff81cbcd09e9551d49c9f4dccdfe004d Mon Sep 17 00:00:00 2001
From: James Callahan <35791147+james-callahan@users.noreply.github.com>
Date: Tue, 13 Feb 2024 01:19:24 +1100
Subject: [PATCH] feat: add a kustomize base to the repository (#144)

Adds a [kustomize application][1] that stands up a running instance of
go-httpbin in a Kubernetes cluster.

This is useful to reference as a remote kustomization via your own
kustomization, or can be used as:

    kustomize build github.com/mccutchen/go-httpbin/kustomize | kubectl apply -f -

or even as:

    kubectl apply -k github.com/mccutchen/go-httpbin/kustomize

[1]: https://kubectl.docs.kubernetes.io/references/kustomize/glossary/#application
---
 README.md                    |  8 ++++++++
 kustomize/README.md          | 39 ++++++++++++++++++++++++++++++++++++
 kustomize/kustomization.yaml |  8 ++++++++
 kustomize/resources.yaml     | 34 +++++++++++++++++++++++++++++++
 4 files changed, 89 insertions(+)
 create mode 100644 kustomize/README.md
 create mode 100644 kustomize/kustomization.yaml
 create mode 100644 kustomize/resources.yaml

diff --git a/README.md b/README.md
index 682835cc..e5d1d52b 100644
--- a/README.md
+++ b/README.md
@@ -23,6 +23,14 @@ $ docker run -P mccutchen/go-httpbin
 $ docker run -e HTTPS_CERT_FILE='/tmp/server.crt' -e HTTPS_KEY_FILE='/tmp/server.key' -p 8080:8080 -v /tmp:/tmp mccutchen/go-httpbin
 ```
 
+### Kubernetes
+
+```
+$ kubectl apply -k github.com/mccutchen/go-httpbin/kustomize
+```
+
+See `./kustomize` directory for further information
+
 ### Standalone binary
 
 Follow the [Installation](#installation) instructions to install go-httpbin as
diff --git a/kustomize/README.md b/kustomize/README.md
new file mode 100644
index 00000000..9bf0a656
--- /dev/null
+++ b/kustomize/README.md
@@ -0,0 +1,39 @@
+This folder is a [kustomize application](https://kubectl.docs.kubernetes.io/references/kustomize/glossary/#application) that stands up a running instance of go-httpbin in a Kubernetes cluster.
+
+You may wish to utilise this as a [remote application](https://kubectl.docs.kubernetes.io/references/kustomize/kustomization/resource/), e.g.
+
+```yaml
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+commonLabels:
+  app.kubernetes.io/name: httpbin
+resources:
+  - github.com/mccutchen/go-httpbin/kustomize
+images:
+  - name: mccutchen/go-httpbin
+```
+
+To expose your instance to the internet, you could add an `Ingress` in an overlay:
+```yaml
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: httpbin
+spec:
+  ingressClassName: myingressname
+  rules:
+    - host: my-go-httpbin.com
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: httpbin
+                port:
+                  name: http
+  tls:
+   - hosts:
+       - my-go-httpbin.com
+     secretName: go-httpbin-tls
+```
diff --git a/kustomize/kustomization.yaml b/kustomize/kustomization.yaml
new file mode 100644
index 00000000..319cabc3
--- /dev/null
+++ b/kustomize/kustomization.yaml
@@ -0,0 +1,8 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+commonLabels:
+  app.kubernetes.io/name: httpbin
+resources:
+  - resources.yaml
+images:
+  - name: mccutchen/go-httpbin
diff --git a/kustomize/resources.yaml b/kustomize/resources.yaml
new file mode 100644
index 00000000..cc1c3e87
--- /dev/null
+++ b/kustomize/resources.yaml
@@ -0,0 +1,34 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: httpbin
+spec:
+  template:
+    spec:
+      containers:
+        - name: httpbin
+          image: mccutchen/go-httpbin
+          ports:
+            - name: http
+              containerPort: 8080
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /status/200
+              port: http
+          readinessProbe:
+            httpGet:
+              path: /status/200
+              port: http
+          resources: {}
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: httpbin
+spec:
+  ports:
+    - port: 80
+      targetPort: http
+      protocol: TCP
+      name: http