Take down the container so that it’s not blocking port 8000. Navigate with a browser or curl to localhost:8000, they both will answer with the id. is a simple service that prints the current container id (hostname). Web services in docker-composeĬompose is really meant for running web services, so let’s move from simple binary wrappers to running a HTTP service. Submit the docker-compose.yml, make sure that it works simply by running docker-compose up if the log file exists. Without a command devopsdockeruh/simple-web-service will create logs into its /usr/src/app/text.log.Ĭreate a docker-compose.yml file that starts devopsdockeruh/simple-web-service and saves the logs into your And the service name can be used to run it: $ docker-compose run youtube-dl-ubuntu Įxercises in part 2 should be done using docker-compose We can also give the container a name it will use when running with container_name. Compose can work without an absolute path: version: '3.5' Volumes in docker-compose are defined with the following syntax location-in-host:location-in-container. To run the image as we did previously, we will need to add the volume bind mounts. Now we can build and push with just these commands: $ docker-compose build The key build: value can be set to a path (ubuntu), have an object with context and dockerfile keys or reference a url of a git repository.
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The version setting is not very strict, it just needs to be above 2 because otherwise the syntax is significantly different. We create a file called docker-compose.yml: version: '3'
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In the folder where we have our Dockerfile with the following content: FROM ubuntu:18.04 Next we will switch to a tool called docker-compose to manage these.ĭocker-compose is designed to simplify running multi-container applications to using a single command. Even with a simple image, we’ve already been dealing with plenty of command line options in both building, pushing and running the image.