![]() This file will then be used by docker in pair with docker-entrypoint-initdb.d to run extra commands on setup. If you take a peek at the db/mysql8/init you’ll notice the initializer also added a 01.sql file. The initializers have created a folder PER DB inside, each with a data folder, init folder, and for MySQL a my.conf file. Let’s take a look at what happened: You should now see a db folder. initializers permissions and runs each DB initializer file respectfully to scaffold out or db folder. ![]() You may need to ensure setup.sh has executable permissions by running chmod +x.run docker-compose config to ensure your ENVs are pulling through.env.example and set your DB ENVs accordingly. We are leveraging Docker/MySQL and Docker/Postgres docs here. This setup will enable you to set up and run, MySQL 5.6, 5.7, 8, and Postgres either as a suite or as individual services (recommended). Note: If you are familiar with docker and want a single instance of a DB feel free to take a quick peek at the docker-compose.yml and copy over what you need. If we need to tweak a config, it’s as easy as stopping the running container, editing/creating a file and restarting. This also lends itself to expansion with other DB tooling, postgres, redis, and memcache for example. Each instance is self contained to it’s container with a persisted volume and config files are set for each as needed. The main focus here is to give each DB instance a home, MySQL 5.6 shouldn’t care about MySQL8, etc. And what if you need to modify some my.cnf files? While services have options, and there are definitely pro’s and con’s to both, having more direct control over what is going in our dev setup can be ideal when onboarding and debugging various applications. At some point, however, you’ll want more direct access to logging, and those free services and hosts stop being free. ![]() Slap that MySQL instance up there and drop some ENVs. Why can’t we just host these in the cloud somewhere?! Absolutely, this is not to discourage other alternatives. Have you ever tried to manage 3 versions of MySQL on a mac? While you can brew link all day… they still share common MySQL setup files and config files via brew… and as you could imagine, and MySQL8 do not play nice together. The same reason you use docker for anything, projects differ, and while version managers work well for programming languages, they are nightmarish for databases. The MySQL database inside the Docker container is ready to use.Below is an exported README from a current docker setup for database versioning.įeel free to clone and follow along in exploring this probably over-engineered setup. You should see the MySQL prompt and be able to run queries. In another terminal, connect to the server with MySQL client: mysql -host=127.0.0.1 -port=3306 -u root -p The server should indicate that it is ready for connections. (For docker-compose this would go under environment: ) ![]() Note that we must pass the root password environment variable to the server. Run the container on port 3306: docker run -e MYSQL_ROOT_PASSWORD=pw -p 3306:3306 my_db DROP DATABASE IF EXISTS local_db īuild the container in the directory with Dockerfile, tagging it with the name my_db (for example): docker build -t my_db. The SQL script to define the database in the container:Ĭreate-local-db.sql: - Local database definition. The Dockerfile extending mysql and specifying the start script:ĬMD To define the container we need two files in the same directory. This can be a dependency for local development, a dependency for tests, among others.įor macOS: if it is not present, install MySQL with Homebrew to get the MySQL client. It is often useful to start up a Docker container running a database server with a pre-defined, ready and prepopulated database via an SQL script, usable as soon as the container starts.
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