From 29ab885606b05cea7dd8db9a13e8a6fcb9838131 Mon Sep 17 00:00:00 2001
From: Drew Bednar <drew@androiddrew.com>
Date: Sat, 9 Oct 2021 21:11:24 -0400
Subject: [PATCH] working helm chart

---
 .gitignore                                    |  1 +
 Makefile                                      | 12 +++++++++
 README.md                                     | 15 ++++++++++-
 app/Dockerfile                                | 27 +++++++++++++++++++
 app/app.py                                    | 18 +++++++++++++
 app/requirements.txt                          |  2 ++
 charts/demo-helm/Chart.yaml                   |  7 +++++
 .../demo-helm/templates/backend-service.yaml  | 13 +++++++++
 charts/demo-helm/templates/backend.yaml       | 23 ++++++++++++++++
 charts/demo-helm/templates/ingress.yaml       | 14 ++++++++++
 10 files changed, 131 insertions(+), 1 deletion(-)
 create mode 100644 Makefile
 create mode 100644 app/Dockerfile
 create mode 100644 app/app.py
 create mode 100644 app/requirements.txt
 create mode 100644 charts/demo-helm/Chart.yaml
 create mode 100644 charts/demo-helm/templates/backend-service.yaml
 create mode 100644 charts/demo-helm/templates/backend.yaml
 create mode 100644 charts/demo-helm/templates/ingress.yaml

diff --git a/.gitignore b/.gitignore
index f8b73e7..37a1417 100644
--- a/.gitignore
+++ b/.gitignore
@@ -138,3 +138,4 @@ dmypy.json
 # Cython debug symbols
 cython_debug/
 
+.idea/
\ No newline at end of file
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..6c0d923
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,12 @@
+
+IMAGE_NAME=registry.runcible.io/demo-helm
+IMAGE_VERSION=1.0.1
+
+push-app-image: build-app-image
+	docker push $(IMAGE_NAME):$(IMAGE_VERSION)
+
+build-app-image:
+	docker build -t $(IMAGE_NAME):$(IMAGE_VERSION) ./app
+
+check:
+	echo $(IMAGE_NAME):$(IMAGE_VERSION)
\ No newline at end of file
diff --git a/README.md b/README.md
index af2e110..cf56fee 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,16 @@
 # demo-helm
 
-A demo helm chart to deploy a simple web app written in Python
\ No newline at end of file
+A demo helm chart to deploy a simple web app written in Python
+
+
+## Setting registry pull secrets
+
+From: [The k8s docs](https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/#create-a-secret-by-providing-credentials-on-the-command-line)
+
+```
+kubectl create secret docker-registry regcred \
+ --docker-server=<your-registry-server> \
+ --docker-username=<your-name> \
+ --docker-password=<your-pword> \
+ --docker-email=<your-email>
+```
\ No newline at end of file
diff --git a/app/Dockerfile b/app/Dockerfile
new file mode 100644
index 0000000..ffac877
--- /dev/null
+++ b/app/Dockerfile
@@ -0,0 +1,27 @@
+# Base Image
+FROM python:3.7.3-stretch
+
+ENV APP_HOME=/opt/app
+
+# Create directory for the app
+RUN mkdir $APP_HOME
+WORKDIR $APP_HOME
+
+# Create the app user
+RUN groupadd app && useradd -g app app
+
+# Install Requirements
+COPY requirements.txt .
+
+RUN pip install --no-cache -r requirements.txt
+
+# Install app
+COPY app.py .
+
+# Chown all the files to the app user
+RUN chown -R app:app $APP_HOME
+
+# Change to the app user
+USER app
+
+CMD gunicorn --log-level=debug -b 0.0.0.0:5000 app:app
diff --git a/app/app.py b/app/app.py
new file mode 100644
index 0000000..c7bfc55
--- /dev/null
+++ b/app/app.py
@@ -0,0 +1,18 @@
+import os
+from flask import Flask
+
+app = Flask(__name__)
+
+__version__ = "1.0.0"
+
+@app.route("/ping")
+@app.route("/")
+def pong():
+    """A simple ping route."""
+    return {"message": "pong"}
+
+
+@app.route("/env")
+def env():
+    """Exposes the environment variables."""
+    return dict(os.environ)
diff --git a/app/requirements.txt b/app/requirements.txt
new file mode 100644
index 0000000..101b36f
--- /dev/null
+++ b/app/requirements.txt
@@ -0,0 +1,2 @@
+flask==2.0.2
+gunicorn==20.1.0
\ No newline at end of file
diff --git a/charts/demo-helm/Chart.yaml b/charts/demo-helm/Chart.yaml
new file mode 100644
index 0000000..a17bb6b
--- /dev/null
+++ b/charts/demo-helm/Chart.yaml
@@ -0,0 +1,7 @@
+---
+apiVersion: v2
+name: demo-helm
+appVersion: 1.0.1
+description: A Helm chart to practice helm
+version: 0.1.1
+type: application
diff --git a/charts/demo-helm/templates/backend-service.yaml b/charts/demo-helm/templates/backend-service.yaml
new file mode 100644
index 0000000..e91ce27
--- /dev/null
+++ b/charts/demo-helm/templates/backend-service.yaml
@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    name: backend
+  name: backend
+spec:
+  ports:
+    - protocol: 'TCP'
+      port: 80
+      targetPort: 5000
+  selector:
+    app: backend
diff --git a/charts/demo-helm/templates/backend.yaml b/charts/demo-helm/templates/backend.yaml
new file mode 100644
index 0000000..b775e34
--- /dev/null
+++ b/charts/demo-helm/templates/backend.yaml
@@ -0,0 +1,23 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: backend
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: backend
+  template:
+    metadata:
+      labels:
+        app: backend
+    spec:
+      containers:
+        - image: registry.runcible.io/demo-helm:1.0.1
+          imagePullPolicy: Always
+          name: backend
+          ports:
+            - name: backend
+              containerPort: 5000
+      imagePullSecrets:
+        - name: regcred
\ No newline at end of file
diff --git a/charts/demo-helm/templates/ingress.yaml b/charts/demo-helm/templates/ingress.yaml
new file mode 100644
index 0000000..22fa287
--- /dev/null
+++ b/charts/demo-helm/templates/ingress.yaml
@@ -0,0 +1,14 @@
+apiVersion: extensions/v1beta1
+# apiVersion: networking.k8s.io/v1 # Supposed to be the new API but of course the spec structure has changed.
+kind: Ingress
+metadata:
+  name: demo-helm-ingress
+spec:
+  rules:
+    - host: backend.runcible.io
+      http:
+        paths:
+          - path: /
+            backend:
+              serviceName: backend
+              servicePort: 80