Sébastien Goasguen's Docker Cookbook: Solutions and Examples for Building PDF

By Sébastien Goasguen

ISBN-10: 149191971X

ISBN-13: 9781491919712

No matter if you are deploying functions on premise or within the cloud, this cookbook offers builders, operators, and IT pros with greater than one hundred thirty confirmed recipes for operating with Docker. With those useful suggestions, skilled builders without prior wisdom of Docker should be capable of package deal and set up allotted purposes inside of a number of chapters. IT execs may be capable of clear up daily difficulties, in addition to create, run, proportion, and install Docker photos. Operators will fast be ready to undertake the instruments that would switch the way in which they paintings.

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Additional info for Docker Cookbook: Solutions and Examples for Building Distributed Applications

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The application uses port 5000, and you expose this port on the Docker host. py at runtime. What is left to do is to build the image: $ docker build -t flask . , 5000): $ docker run -d -P flask 5ac72ed12a72f0e2bec0001b3e78f11660905d20f40e670d42aee292263cb890 $ docker ps CONTAINER ID IMAGE COMMAND ... p ... 0:49153->5000/tcp The container returns, it is daemonized, and you are not logged in to an interactive shell. PORTS shows a mapping between port 5000 of the container and port 49153 of the Docker host.

Of interest is that you can create a database and a user with appropriate privileges to manipulate that database by using a few environment variables: MYSQL_DATABASE, MYSQL_USER, and MYSQL_PASSWORD. In the preceding example, WordPress is run as the root MySQL user and this is far from best practice. It would be better to create a word press database and a user for it, like so: $ docker run --name mysqlwp -e -e -e -e -d MYSQL_ROOT_PASSWORD=wordpressdocker \ MYSQL_DATABASE=wordpress \ MYSQL_USER=wordpress \ MYSQL_PASSWORD=wordpresspwd \ mysql If you need to remove all existing containers, you can use a short‐ cut making use of a subshell command: $ docker stop $(docker ps -q) $ docker rm -v $(docker ps -aq) The -v option of docker rm removes the volume defined by the MySQL image.

If you are using Boot2Docker, you will have to use the IP address of the bridge network, instead of localhost. If you do want to use localhost, add port forwarding rules in VirtualBox. Discussion Since your Dockerfile specified a command to run via CMD, you do not need to specify a command after the name of the image to use. 5 Optimizing Your Dockerfile by Following Best Practices Problem You want to follow best practices to write your Dockerfiles and optimize your Docker images.

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Docker Cookbook: Solutions and Examples for Building Distributed Applications by Sébastien Goasguen

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