Prepared kubernetes deployment (#14)

* Added DO load balancer annotations
* Added basic health check API
* Better settings
* Pick version at build from tags

.github/workflows/release-package.yaml

@@ -48,6 +48,7 @@ jobs:
         with:
           context: .
           push: true
+          build-args: VERSION=${{ steps.meta.outputs.tags }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=local,src=/tmp/.buildx-cache

Dockerfile

@@ -5,13 +5,11 @@ RUN apt update && apt install --yes \
     locales \
     locales-all \
     entr \
-    git \
     wkhtmltopdf \
     && rm -rf /var/lib/apt/lists/*
 
 # prepare application folder
-RUN mkdir -p /app/src \
-    && mkdir -p /app/shared
+RUN mkdir -p /app/src
 
 # install python dependencies
 WORKDIR /app
@@ -29,8 +27,12 @@ COPY ./src /app/src
 
 EXPOSE 8000
 ENV SERVICE_PORT=8000
+
+ARG VERSION=local  # override at build
+ENV VERSION=${VERSION}
+
 CMD ["start"]
 
 VOLUME [ "/app/src" ]
-VOLUME [ "/app/shared" ]
-VOLUME [ "/app/htmlcov/" ]
+VOLUME [ "/app/data/db.sqlite3" ]
+

deploy/service.yaml

@@ -2,12 +2,43 @@ apiVersion: v1
 kind: Service
 metadata:
   name: micro-invoicer
+  annotations:
+    service.beta.kubernetes.io/do-loadbalancer-name: "micro-invoicer"
+    service.beta.kubernetes.io/do-loadbalancer-protocol: "http"
+    service.beta.kubernetes.io/do-loadbalancer-tls-ports: "443"
+    service.beta.kubernetes.io/do-loadbalancer-redirect-http-to-https: "true"
+    service.beta.kubernetes.io/do-loadbalancer-enable-proxy-protocol: "true"
+    service.beta.kubernetes.io/do-loadbalancer-enable-backend-keepalive: "true"
+
+    # TODO: template ?
+    # service.beta.kubernetes.io/do-loadbalancer-certificate-id: "1234-5678-9012-3456"
+    service.beta.kubernetes.io/do-loadbalancer-hostname: "micro-invoicer.fibonet.ro"
+    service.beta.kubernetes.io/do-loadbalancer-disable-lets-encrypt-dns-records: "false"
+
+    # Just in case
+    # service.beta.kubernetes.io/do-loadbalancer-sticky-sessions-type: "cookies"
+    # service.beta.kubernetes.io/do-loadbalancer-sticky-sessions-cookie-name: "example"
+    # service.beta.kubernetes.io/do-loadbalancer-sticky-sessions-cookie-ttl: "60"
+
+    service.beta.kubernetes.io/do-loadbalancer-healthcheck-port: "8000"
+    service.beta.kubernetes.io/do-loadbalancer-healthcheck-protocol: "http"
+    service.beta.kubernetes.io/do-loadbalancer-healthcheck-path: "/healthy"
+    service.beta.kubernetes.io/do-loadbalancer-healthcheck-check-interval-seconds: "8"
+    service.beta.kubernetes.io/do-loadbalancer-healthcheck-response-timeout-seconds: "5"
+    service.beta.kubernetes.io/do-loadbalancer-healthcheck-unhealthy-threshold: "3"
+    service.beta.kubernetes.io/do-loadbalancer-healthcheck-healthy-threshold: "5"
+
 spec:
+  type: LoadBalancer
   selector:
     app: micro-invoicer
   ports:
-  - protocol: TCP
-    port: 80
-    targetPort: 8000
-  type: LoadBalancer
+    - name: http
+      protocol: TCP
+      port: 80
+      targetPort: 8000
+    - name: https
+      protocol: TCP
+      port: 443
+      targetPort: 8000
 

docker-compose.yaml

@@ -2,8 +2,12 @@ version: "3"
 
 services:
   micro-invoicer:
-    build: ./
+    build: .
     ports:
       - 8000:8000
     volumes:
       - ./src:/app/src
+      - ./data/db.sqlite3:/app/data/db.sqlite3
+    environment:
+      - DEBUG=on
+

src/microinvoicer/micro_timesheet.py

@@ -61,7 +61,6 @@ def previous_month():
 
 
 def create_random_tasks(activity, how_many, hours):
-
     names = pick_task_names(flavor=activity["flavor"], count=how_many)
     durations = split_duration(duration=hours, count=how_many)
     dates = compute_start_dates(activity["start_date"], durations)

src/microinvoicer/views.py

@@ -1,5 +1,4 @@
-"""How about now."""
-from datetime import date, timedelta, datetime
+from datetime import date, timedelta
 from django.http import FileResponse
 from django.urls import reverse_lazy
 from django.views.generic import TemplateView
@@ -59,7 +58,6 @@ def get_context_data(self, **kwargs):
 
 
 class ReportView(LoginRequiredMixin, TemplateView):
-
     template_name = "report.html"
 
     def get_context_data(self, **kwargs):

src/microtools/healthy.py

@@ -0,0 +1,12 @@
+from django.http import JsonResponse
+from django.conf import settings
+
+
+def health_check(request):
+    response = dict(
+        status="healthy",
+        version=settings.VERSION,
+        debug=settings.DEBUG,
+        message="Service is up and running",
+    )
+    return JsonResponse(response, status=200)

src/microtools/settings.py

@@ -3,9 +3,11 @@
 """
 import os
 
+TRUEISH = {"true", "True", "yes", "1", "on"}
+DEBUG = os.environ.get("DEBUG", "False") in TRUEISH
 
-DEBUG = False
-ALLOWED_HOSTS = ["micro.fibonet.ro"]
+ALLOWED_HOSTS = os.environ.get("ALLOWED_HOSTS", "localhost").split(",")
+VERSION = os.environ.get("VERSION", "develop")
 
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 
@@ -53,7 +55,7 @@
 DATABASES = {
     "default": {
         "ENGINE": "django.db.backends.sqlite3",
-        "NAME": os.path.join(BASE_DIR, "db.sqlite3"),
+        "NAME": os.path.join("/", "app", "data", "db.sqlite3"),
     }
 }
 

src/microtools/urls.py

@@ -15,9 +15,11 @@
 """
 from django.contrib import admin
 from django.urls import include, path
+from .healthy import health_check
 
 
 urlpatterns = [
+    path("healthy/", health_check, name="healthy"),
     path("admin/", admin.site.urls),
     path("", include("microinvoicer.urls")),
 ]