mysql/build-context/Dockerfile

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+# For the remainder of this Dockerfile EXAMPLE_ARG_FOR_DOCKERFILE will be
+# available with a value of 'must_be_available_in_dockerfile', check out the env
+# file at 'env/fully.qualified.domain.name.example' for reference.
+# ARG EXAMPLE_ARG_FOR_DOCKERFILE
+
+# Another env var, this one's needed in the example build step below:
+# ARG MYSQL_VERSION
+
+# Example
+# FROM "mysql:${MYSQL_VERSION}"
+# RUN apt-get update && \
+#     apt-get -y install \
+#     somepackage-6.q16-6-extra && \
+#     rm -rf /var/lib/apt/lists/*

mysql/common-settings.yml

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+services:
+    common-settings:
+        environment:
+            TZ: "${TIMEZONE:-Etc/UTC}"
+        logging:
+            driver: "json-file"
+            options:
+                max-size: "10m"
+                max-file: "10"
+                compress: "true"
+        restart: "${RESTARTPOLICY:-unless-stopped}"

mysql/docker-compose.override.yml

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+services:
+    mysql-build:
+        image: "mysql/mysql-server:${MYSQL_VERSION}"
+        profiles: ["build"]
+        build:
+            context: "build-context/mysql"
+            dockerfile: Dockerfile
+            args:
+                MYSQL_VERSION: "${MYSQL_VERSION}"

mysql/docker-compose.yml

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+services:
+    mysql:
+        image: "mysql/mysql-server:${MYSQL_VERSION}"
+        container_name: "mysql-${CONTEXT}"
+        networks:
+            mysql-default:
+        extends:
+            file: common-settings.yml
+            service: common-settings
+        ports:
+            - 3306:3306
+        volumes:
+            - /opt/docker-data/mysql-${CONTEXT}/data:/var/lib/mysql
+            - /opt/docker-data/mysql-${CONTEXT}/config/my.cnf:/etc/my.cnf
+        environment:
+            MYSQL_USER: ${MYSQL_USER}
+            MYSQL_PASSWORD: ${MYSQL_PASSWORD}
+networks:
+    mysql-default:
+        name: mysql-${CONTEXT}
+        driver: bridge
+        driver_opts:
+            com.docker.network.enable_ipv6: "false"
+        ipam:
+            driver: default
+            config:
+                - subnet: 172.16.7.0/24

mysql/env/.gitignore

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+*.env

mysql/env/fully.qualified.domain.name_ctx.env.example

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+CONTEXT=loft_ent
+
+
+
+# Set something sensible here and uncomment
+# ---
+# MYSQL_VERSION=x.y.z
+
+
+
+# A ${LOCATION} var is usually not needed. It may be helpful when a ${CONTEXT}
+# extends over more than one location e.g. to bind-mount location-specific
+# config files or certificates into a container.
+# ---
+# LOCATION=
+
+
+
+# Feel free to leave defaults. They apply while these vars are commented out
+# ---
+# RESTARTPOLICY=unless-stopped
+# TIMEZONE=Etc/UTC
+
+
+
+# See 'docker-compose.override.yml' for how to make a variable available in
+# a Dockerfile
+# ---
+# EXAMPLE_ARG_FROM_ENV_FILE=must_be_available_in_dockerfile