starting mysql database server mysqld docker mysql

#Starting mysql database server mysqld docker mysql password

The important thing to note here is that these environment variables are set only during the first initialization of the container. Every script that is located in the docker-entrypoint-initdb.d directory will be executed in the alphabetical order. With the second volume, we are mapping our scripts directory /AccountOwnerServer/DbScript to the docker-entrypoint-initdb.d directory. MySQL container will use the first volume to save all the data to the /var/lib/mysql directory.

#Starting mysql database server mysqld docker mysql password

MYSQL_PASSWORD: dbuserpassword generates the password for the user “dbuser”Īfter that, we create two volumes: one for the database data, and one to map our init.sql script that will create database tables and populate them with data.MYSQL_USER: dbuser creates the user “dbuser”.MYSQL_DATABASE: accountowner creates the “accountowner” database.This password will be shown in the console output MYSQL_RANDOM_ROOT_PASSWORD: 1 sets the random password for the root user.A MySQL image has some predefined environment values that it looks for while initializing. In the db service, we are configuring the MySQL container once we run the image. This service name is also a server name for that container and that’s why we’ve used it in our connection string. So, as you may see, we added the db service to our docker-compose.yml. _MySQL_Init_Script:/docker-entrypoint-initdb.d We are going to use mysql:5.7 image since it’s compatible with our application: Now that we prepared our application, let’s add the MySQL image to our docker-compose.yml. 'connectionString': 'server=db port=3306 userid=dbuser password=dbuserpassword database=accountowner ' We are also changing the server from localhost to db. There is one more thing we need to change, and that’s the connection string in the appsettings.json file since we don’t want to use the root user. Services.AddDbContext(o => o.UseMySql(connectionString))

Public static void ConfigureMySqlContext(this IServiceCollection services, IConfiguration config) Now that we introduced Docker Compose, we can revert the changes we made to the ServiceExtensions.cs class: We did this in order to demonstrate Docker commands easier. In part 1 of the series, while preparing our ASP.NET Core application for dockerization, we switched from the MySQL database to the in-memory one. Let’s move on to the main part, and where the real fun begins.Īdding a MySQL Database with Docker Compose We have removed the need for the docker build command just like that. Now try running the command and see for yourself if that’s the case. So, now we can add the -build flag to our docker-compose command to force the rebuild of the image: docker-compose up -build. The build step sets the context to the current directory and enables us to build our image using the Dockerfile defined in that context. To automate this step we can modify our docker-compose.yml file with the build step: command, and then run the docker-compose up command in order to apply those changes. We would need to build the image again with the docker build -t codemazeblog/accountownerapp. But if we make some changes to the application or the Dockerfile, Compose would still run the image we’ve built before those changes. Ok, so until now, we’ve just run the existing image with docker compose.

To make sure you release the resources you need to run docker-compose down. One thing to note here is that if we quit a container with Ctrl+C, it won’t kill the container or the network created by Compose. In that case, we would need to stop the service(s) with docker-compose down.

We can run our services in the background by adding -d flag: docker-compose up -d. We’ve described what image we want to run and which port we need to expose. In our case, this is just our application, but soon we’re going to add one more service to it. Now the only command we need to run to achieve the same result is docker-compose up.Īs you may see, the docker-compose.yml contains the set of services. To jog your memory, we used to run our application like this: docker run -rm -it -p 8080:5000 codemazeblog/accountowner:runtime. This is the simplest of Compose files, and it’s practically the same thing we did with the docker run command in the last part of the series. Once we’ve created the file, we can start adding some commands to it: So let’s start by adding a docker-compose.yml file to the root of our solution. This file is usually called docker-compose.yml and it’s placed at the root of our project.

Adding Docker Compose to Our ApplicationĬompose relies on a YAML file. Let’s drill down into it and see how awesome Compose can be.