Ops Made Easy: An introduction to using Docker

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Ops Made Easy An introduction to using Docker Tom Paulus @tompaulus https://github.com/tpaulus https://tompaulus.com

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Traditional Method • Multiple VMs run on unit of hardware • Each VM is completely independent and runs its own Guest OS • Hypervisor monitors and supports VMs running on the infrastructure © Tom Paulus @tompaulus https://tompaulus.com App A Bins/Libs Guest OS App B Bins/Libs Guest OS App C Bins/Libs Guest OS Hypervisor Infrastructure VM

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Containerized Method • Containers can share the Host OS with other containers, making them much smaller and simpler • Because of this they start almost instantly and managing containers is much easier as we will see © Tom Paulus @tompaulus https://tompaulus.com App A Bins/Libs App B Bins/Libs App C Bins/Libs Host OS Infrastructure CONTAINER Docker

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Testing your Docker Install © Tom Paulus @tompaulus https://tompaulus.com

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Real-Life Application © Tom Paulus @tompaulus https://tompaulus.com • Wordpress presents us with a perfect application • Composed of a Web Server (commonly nginx) and a DB (commonly MySQL) Wordpress MySQL

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Real-Life Application © Tom Paulus @tompaulus https://tompaulus.com docker run \ --name demo-mysql \ -e MYSQL_ROOT_PASSWORD=my-secret-pw \ -d \ mysql

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Real-Life Application © Tom Paulus @tompaulus https://tompaulus.com docker run \ --name demo-wordpress \ --link demo-mysql:mysql \ -p 8080:80 \ -d \ wordpress

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Want to Learn More? • Docker’s Website and the Community Hub • https://www.docker.com • https://store.docker.com • Google & the Community • There are tons of resources online, just a quick Google Search Away! © Tom Paulus @tompaulus https://tompaulus.com