Add alpine based docker image

.dockerignore

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+*.md
+*.yml
+.git/
+.gitignore
+Dockerfile

Dockerfile

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+FROM python:3-alpine
+
+# Caching layer with bash, tini, UWSGI and mysql / pg clients
+RUN set -ex \
+  && apk add --no-cache mariadb-libs mariadb-client-libs postgresql-libs tini bash \
+  && apk add --no-cache --virtual .build-deps \
+    gcc \
+    # uwsgi needs linux headers
+    linux-headers \
+    # pip install needs py3 & musl dev
+    python3-dev \
+    musl-dev \
+    mariadb-dev \
+    postgresql-dev\
+  && pip3 install --no-cache-dir uwsgi mysqlclient psycopg2==2.6.2 \
+  && apk del .build-deps
+
+# Add hc user
+RUN adduser -D -u 1000 hc
+
+# Install app requirements
+COPY requirements.txt /usr/src/app/
+WORKDIR /usr/src/app/
+RUN set -ex \
+  && apk add --no-cache --virtual .build-deps \
+    gcc \
+    python3-dev \
+    musl-dev \
+  && pip3 install braintree \
+  && pip3 install --no-cache-dir -r requirements.txt \
+  && apk del .build-deps
+
+
+# Copy application source
+COPY . /usr/src/app
+
+# Read settings from env vars
+RUN cp hc/local_settings.py.docker hc/local_settings.py
+
+# Pre-compile assets
+RUN set -ex \
+  && ./manage.py collectstatic --no-input \
+  && ./manage.py compress \
+  && chown -R hc:hc /usr/src/app
+
+EXPOSE 9090
+ENTRYPOINT [ "/usr/bin/tini", "--" ]
+CMD [ "/usr/src/app/bin/uwsgi-start.sh" ]

bin/uwsgi-start.sh

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+#!/bin/sh
+set -ex
+
+# wait for database connection to run migration
+while ! ./manage.py migrate 2>&1; do
+    sleep 5
+done
+
+#replace bash with uwsgi
+exec uwsgi --master \
+    --uid hc \
+    --gid hc \
+    --http-socket 0.0.0.0:9090 \
+    --processes 2 \
+    --threads 2 \
+    --chdir /usr/src/app \
+    --module hc.wsgi:application \
+    --enable-threads \
+    --thunder-lock \
+    --static-map /static=/usr/src/app/static-collected \
+    --attach-daemon "./manage.py sendalerts"

docker-compose.yml

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+version: '2'
+services:
+  hc:
+    build: .
+    # image: haswalt/docker-healthchecks
+    image: quay.io/honestbee/healthcheck:latest
+    ports:
+      - "9090:9090"
+    depends_on:
+      - db
+    environment:
+      HEALTHCHECKS_EMAIL_HOST: mailhog
+      HEALTHCHECKS_EMAIL_PORT: 1025
+      HEALTHCHECKS_DB: mysql
+      HEALTHCHECKS_DB_HOST: db
+      HEALTHCHECKS_DB_USER: root
+      HEALTHCHECKS_DB_PASSWORD: pa55word
+      HEALTHCHECKS_SITE_ROOT: http://localhost:9090
+      HEALTHCHECKS_DEBUG: 1
+  mailhog:
+    image: mailhog/mailhog
+    ports:
+      - "8025:8025"
+  db:
+    image: mariadb
+    environment:
+      MYSQL_ROOT_PASSWORD: pa55word
+      MYSQL_USER: hc
+      MYSQL_PASSWORD: pa55word
+      MYSQL_DATABASE: hc

hc/local_settings.py.docker

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+"""
+Local settings for the HealthChecks app
+"""
+
+import os
+
+ALLOWED_HOSTS = ['*']
+DEBUG = os.getenv('HEALTHCHECKS_DEBUG', False)
+
+HOST = os.getenv('HEALTHCHECKS_HOST', "localhost")
+SITE_ROOT = os.getenv('HEALTHCHECKS_SITE_ROOT', "http://localhost:9090")
+PING_ENDPOINT = SITE_ROOT + "/ping/"
+
+DEFAULT_FROM_EMAIL = os.getenv('HEALTHCHECKS_EMAIL_FROM', "[email protected]")
+EMAIL_HOST = os.getenv('HEALTHCHECKS_EMAIL_HOST', "localhost")
+EMAIL_PORT = os.getenv('HEALTHCHECKS_EMAIL_PORT', 25)
+EMAIL_HOST_USER = os.getenv('HEALTHCHECKS_EMAIL_USER', "")
+EMAIL_HOST_PASSWORD = os.getenv('HEALTHCHECKS_EMAIL_PASSWORD', "")
+
+if os.environ.get("HEALTHCHECKS_DB") == "postgres":
+    DATABASES = {
+        'default': {
+            'ENGINE':   'django.db.backends.postgresql',
+            'NAME':     os.getenv("HEALTHCHECKS_DB_NAME", "hc"),
+            'USER':     os.getenv('HEALTHCHECKS_DB_USER', "postgres"),
+            'PASSWORD': os.getenv('HEALTHCHECKS_DB_PASSWORD', ""),
+            'HOST':     os.getenv('HEALTHCHECKS_DB_HOST', "localhost"),
+            'TEST': {'CHARSET': 'UTF8'}
+        }
+    }
+
+if os.environ.get("HEALTHCHECKS_DB") == "mysql":
+    DATABASES = {
+        'default': {
+            'ENGINE': 'django.db.backends.mysql',
+            'USER':     os.getenv('HEALTHCHECKS_DB_USER', "root"),
+            'PASSWORD': os.getenv('HEALTHCHECKS_DB_PASSWORD', ""),
+            'NAME':     os.getenv("HEALTHCHECKS_DB_NAME", "hc"),
+            'HOST': os.getenv('HEALTHCHECKS_DB_HOST', "localhost"),
+            'TEST': {'CHARSET': 'UTF8'}
+        }
+    }