docker: enhancement to choose light containers with Alpine and debian…

…:slim (base)

README.rst

@@ -85,6 +85,8 @@ To generate correct files, please provide the following input to Cookiecutter:
                               without one (`None`).
 `datamodel_extension_class`   Name of the class of your custom datamodel.
 `datamodel_pid_name`          Name of the Persistent IDentifier attribute of the datamodel.
+`docker_size`                 Either you want to use Alpine Docker containers or normal
+                              ones.
 ============================ ==============================================================
 
 Further documentation is available on https://invenio.readthedocs.io/

cookiecutter.json

@@ -14,5 +14,6 @@
     "elasticsearch": ["6", "5"],
     "datamodel": ["Custom", "None"],
     "datamodel_extension_class": "{{ cookiecutter.project_name | replace('-', '') | replace(' ', '') }}",
-    "datamodel_pid_name": "id"
+    "datamodel_pid_name": "id",
+    "docker_size": ["light", "normal"]
 }

{{cookiecutter.project_shortname}}/Dockerfile.base

@@ -7,6 +7,25 @@
 # and includes Pip, Pipenv, Node.js, NPM and some few standard libraries
 # Invenio usually needs.
 
+{%- if cookiecutter.docker_size == 'light'%}
+FROM inveniosoftware/debian10-python:3.6-slim
+{%- else %}
 FROM inveniosoftware/centos7-python:3.6
+{%- endif %}
 COPY Pipfile Pipfile.lock ./
+{%- if cookiecutter.docker_size == 'light'%}
+# As we get a tiny image, we install needed packages (to build UWSGI deps)
+RUN set -ex \
+  && buildDeps=' \
+  gcc \
+  python-dev \
+' \
+&& apt-get update \
+&& apt-get install --no-install-recommends -y \
+  $buildDeps \
+&& pipenv install --deploy --system \
+&& apt-get purge -y --autoremove $buildDeps \
+&& rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+{%- else %}
 RUN pipenv install --deploy --system
+{%- endif %}

{{cookiecutter.project_shortname}}/docker-services.yml

@@ -39,14 +39,22 @@ services:
       - "80"
       - "443"
   cache:
+    {%- if cookiecutter.docker_size == 'light'%}
+    image: redis:alpine
+    {%- else %}
     image: redis
+    {%- endif %}
     restart: "always"
     read_only: true
     ports:
       - "6379:6379"
   db:
     {%- if cookiecutter.database == 'postgresql'%}
+    {%- if cookiecutter.docker_size == 'light'%}
+    image: postgres:9.6-alpine
+    {%- else %}
     image: postgres:9.6
+    {%- endif %}
     restart: "always"
     environment:
       - "POSTGRES_USER={{cookiecutter.project_shortname}}"
@@ -66,7 +74,11 @@ services:
       - "3306:3306"
     {%- endif %}
   mq:
+    {%- if cookiecutter.docker_size == 'light'%}
+    image: rabbitmq:3-management-alpine
+    {%- else %}
     image: rabbitmq:3-management
+    {%- endif %}
     restart: "always"
     ports:
       - "15672:15672"

{{cookiecutter.project_shortname}}/docker/haproxy/Dockerfile

@@ -1,5 +1,9 @@
 {% include 'misc/header.py' %}
+{%- if cookiecutter.docker_size == 'light'%}
+FROM haproxy:1.8-alpine
+{%- else %}
 FROM haproxy:1.8
+{%- endif %}
 RUN mkdir -p /usr/local/var/lib/haproxy/
 COPY haproxy.cfg /usr/local/etc/haproxy/haproxy.cfg
 COPY haproxy_cert.pem /usr/local/etc/cert.pem

{{cookiecutter.project_shortname}}/docker/nginx/Dockerfile

@@ -1,5 +1,9 @@
 {% include 'misc/header.py' %}
+{%- if cookiecutter.docker_size == 'light'%}
+FROM nginx:alpine
+{%- else %}
 FROM nginx
+{%- endif %}
 COPY nginx.conf /etc/nginx/nginx.conf
 COPY conf.d/* /etc/nginx/conf.d/
 COPY test.key /etc/ssl/private/test.key

{{cookiecutter.project_shortname}}/docker/postgres/Dockerfile

@@ -1,3 +1,7 @@
 {% include 'misc/header.py' %}
+{%- if cookiecutter.docker_size == 'light'%}
+FROM postgres:9.6-alpine
+{%- else %}
 FROM postgres:9.6
+{%- endif %}
 COPY ./init-app-db.sh /docker-entrypoint-initdb.d/10-init-app-db.sh

{{cookiecutter.project_shortname}}/docker/wait-for-services.sh

@@ -27,7 +27,11 @@ check_ready "MySQL" _db_check
 _es_check(){ curl --output /dev/null --silent --head --fail http://localhost:9200 &>/dev/null; }
 check_ready "Elasticsearch" _es_check
 
+{%- if cookiecutter.docker_size == 'light'%}
+_redis_check(){ docker-compose exec cache sh -c 'redis-cli ping' | grep 'PONG' &> /dev/null; }
+{%- else %}
 _redis_check(){ docker-compose exec cache bash -c 'redis-cli ping' | grep 'PONG' &> /dev/null; }
+{%- endif %}
 check_ready "Redis" _redis_check
 
 _rabbit_check(){ docker-compose exec mq bash -c "rabbitmqctl status" &>/dev/null; }