The following command starts another mysql container instance and runs the mysql command line client against your original mysql container, allowing you to execute SQL statements against your database instance:. The Ip Address is different now. This means that we are not running the mysql connect container on the same network the mysql container is currently running on. We need to connect it to the same network use —net option. We need to connect to this network.
So we change out command to this:. You are commenting using your WordPress. You are commenting using your Google account. You are commenting using your Twitter account. You are commenting using your Facebook account. Notify me of new comments via email. Notify me of new posts via email. Skip to content Home About. Share this: Twitter Facebook. Like this: Like Loading Leave a Reply Cancel reply Enter your comment here Fill in your details below or click an icon to log in:. Email required Address never made public.
With Docker containers you can have multiple versions of the same database easily accessible and quickly restore from backups to make sure your test data is congruent with production data. To complete this how-to should take about 90 minutes. We estimate thirty minutes for installing the prerequisites and another sixty minutes to follow the guide.
It will download this image from Dockerhub, so if you have a slow connection this make take a while! In your terminal, enter:. When you created your container above, you exposed a port to the local environment -p Docker mapped that port for you, and you can find that port by running docker ps.
For example, if you wanted to turn the U. If you want an already-corrected sample file to play with, you can find one here. Then create a table in the mysql database:. Once you have data loaded, you can exit your local mysql shell client and create a dump of that table. If you really want to create an image with your data baked into it, you can check out this StackOverflow question.
You can add data to a running container. Remember to change test-mysql-2 to the name of your new container if you called it anything else! Maybe even the dump you created in a previous step! In your terminal, run the following.
Run docker ps again to find the port to use to connect, and use your local mysql client to check on your new database. If you run into errors with your. Then run docker-compose up -d in the same directory as the docker-compose.
Docker will automagically generate a name for your container. In the above string, test-mysql is the name of your MySQL container.
Wait for npm to finish installing, then cd into the directory name you chose. Now create a connection to MySQL with lb datasource :. If you want a list of all the properties and their types in LoopBack format for this sample dataset, you can find it here.
Check to make sure your MySQL container is up and running with docker ps :. To run your api, just run the Node app that LoopBack created with node.
You can find more information about using regex with LoopBack here. In this guide, we learned how to: create a MySQL container with Docker, using both external and in-container data, and how to connect to that container from local clients and local development environments.
Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I have setup docker container with mysql that expose I've specified database user, database password and create a test db and give the privileges to new user. In another container i want to accesso to this db. So i set up new container with a simply php script that create new table in this db. I know that mysql container's ip is Than using mysqli i create new table and all works fine.
But i think that connect to container using his ip address is not good. Is there another way to specify db host?
Create a database in a Docker container for local development
I tryed with the hostname of the mysql container but it doens't work. You need to link your docker containers together with --link flag in docker run command or using link feature in docker-compose.
For instance:. The --link flag is considered a legacy feature, you should use user-defined networks. Every container on that network will be able to communicate with each other using the container name as hostname.
In your docker-compose. How are we doing?
How to link Docker containers together
Please help us improve Stack Overflow. Take our short survey. Learn more. Access to mysql container from other container Ask Question. Asked 4 years, 1 month ago. Active 1 year, 1 month ago. Viewed 29k times. Smita Ahinave 1, 6 6 gold badges 18 18 silver badges 37 37 bronze badges. Isky Isky 1 1 gold badge 9 9 silver badges 24 24 bronze badges.At this point we have a bunch of docker images, but no docker containers running. We will fix that in this post.
We will look at docker-compose and how it orchestrates bringing up all of our docker containers. Then we will look at some administrative tasks in docker. This includes backing up the site and keeping logs.
Docker-compose is a tool from Docker that allows us to define how each container will fit in our application. It makes for a single command to get everything up and running. Docker-compose should already be installed on our target machine by Ansible. First thing we will do is look at our docker-compose. This may look a little weird as it is a template for Ansible. When Ansible copies this over it will look into the client environment to find all the MySQL variables needed.
We should have an environment file that is not checked into git that has these values. Remember that the actual MySQL user and password really do not matter. In fact they could be randomly created before each run. If we need to change the password we just restart the MySQL container and everything is ready to go.
The first is MySQL. Each of these folders will be named after the Docker container we want to build. The Dockerfile is pretty basic and we will not cover it in depth as all the Dockerfiles were covered in the previous post in this series. It will then load all of its runtime information from the environment.
We could create a completely random username, password, and database and everything would work how we expect. It will then share that data through a volume to both the backend Nginx container and the PHP container. This container will not actually run. This is a really cool feature of Docker that is sometimes ignored. Volumes will stick around until all the containers that are using them are destroyed. This container shares a volume with two other containers, so the volume will be available as long as we have not destroyed the other containers.
Now we have the PHP container. It will use the data from our data container. This is important because it will create environment variables inside the container that allow us to configure WordPress on the fly.
The first set of variables created will map to the IP address of the mysql container. Next the PHP container will also get all the environment variables of the linked container. This includes the username, password, and database values. These variables are needed because we configure WordPress to connect to the database using these values.
We can now define our backend origin server. This will use the same data as the PHP container. Nginx will send a full PHP path that must exist for it to be processed.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. I use docker compose to start mysql and nodejs server.
When container start my nodejs server will to run raw query to mysql, but I always got the access denied. Even I grant the permission or use root.
I even use sequel pro to grant all privilege but still got access denied. Are you sure you're using the mysql image? Just run docker-compose up --abort-on-container-exit --build. My issue is cased by another container accessing mysql. If you do a full docker-compose downmake sure any extra volumes are removed, then bring it back up, I imagine it'll probably work. Here's the same example I provided above, but using a second container instead of using docker exec :.
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Could you post the docker-compose. Version: '5. Welcome to the MySQL monitor. All rights reserved. Other names may be trademarks of their respective owners.
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Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I'm trying to connect to a mysql container from within another container on the same network specified by a compose file. I'm not really sure what the connection parameters would be if I'm trying to connect to the mysql container from the php container. Specifically, what are the host and port for the mysql container from within another container of the same docker-compose network?
You should link the containers. Add ports section to mysql container and links section to php container. With that configuration you'll be able to access mysql container from php with mysql Learn more.
Asked 2 years, 8 months ago. Active 2 years, 8 months ago. Viewed 5k times. I've tried host: mysql port:but that doesn't seem to work. Confused Confused 51 1 1 silver badge 2 2 bronze badges. Active Oldest Votes. Taras Velykyy Taras Velykyy 1, 1 1 gold badge 15 15 silver badges 26 26 bronze badges. You don't share port for mysql add to your docker-compose.
Andrei Andrei 73 1 1 silver badge 9 9 bronze badges. This is incorrect for shared services on the same docker network. I'm not exposing the container to the host. I want to expose the container to another container on the same docker network. Sign up or log in Sign up using Google. Sign up using Facebook.
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Featured on Meta. Triage needs to be fixed urgently, and users need to be notified upon…. Dark Mode Beta - help us root out low-contrast and un-converted bits. Technical site integration observational experiment live on Stack Overflow. Related When using Docker to containerize your applications, it is common practice to run each component of the application in a separate container. For example, a website might have a web server, application, and database, each running in its own container.
Configuring the containers to communicate with each other and the host machine can be a challenge. This guide will use a simple example app to demonstrate the basics of Docker container communication.
The app will consist of a Node.
To install on another distribution, or to install on Mac or Windows, see the official installation page. For Ubuntu The example app used throughout this guide will be a simple Node. In this section, you will build and test the app on your Linode without using containers. Since you will be connecting to this database from a container which will have an IP address other than locahostyou will need to edit the PostgreSQL config file to allow connections from remote addresses.
This app uses the pg NPM module node-postgres to connect to the database created in the previous section. Replace 'newpassword' with the postgres database user password you set in the previous section. This section illustrates a use case where the Node. Edit app. Docker automatically sets up a default bridge networkaccessed through the docker0 network interface. Use ifconfig or ip to view this interface:.
Since The --add-host option defines a database host, which points to the IP address of the Docker host. Declaring the database host at runtime, rather than hard-coding the IP address in the app, helps keep the container reusable. From within the container, use ping to test the connection to the database host:. Each Docker container is also assigned its own IP address from within the Find the IP address of this container with ip :.
In this section, both the app and database will be running in separate containers. Make sure your backup. The new container will automatically start the postgres database and create the postgres user. Enter the container and load the SQL dump:. Run the node image again. Since the Node. You should be able to run the app as before:.
Using the --link or --host options every time you launch your containers can be cumbersome. If your server or any of the containers crash, they must be manually reconnected. This is not an ideal situation for any application that requires constant availability.
Fortunately, Docker provides Docker Compose to manage multiple containers and automatically link them together when they are launched. This section will use Docker Compose to reproduce the results of the previous section.
In the same directory as your Dockerfile, create a docker-compose. As before, the database container will use the official PostgreSQL image, while the app container will be built from your Dockerfile. The links entry serves the same function as the --link option in the run command used earlier.