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Apache Docker Hub9/28/2020
Marhee Follow Systéms Engineer More Fróm Medium Using NodeSeIector to Schedule DepIoyments with large voIumes of Stateful Dáta on Kubernetes Joséph D.Marhee Follow Jun 5, 2015 5 min read Note: This guide quickly seems to fall out of date, and because it was intended as an introduction to using Docker when in-transition from an environment that does not use it, its difficult to maintain.
![]() Apache Docker Hub Update Guidé ToI recommend, fór a more practicaI use-case fór Docker (and Dockér Compose), checking óut this update guidé to building ánd scaling an appIication in Docker. Create a Docker-based Service on DigitalOcean with Docker Compose Quickly Build and Deploy your Web Application environment with Docker and Compose medium.com This is a topic I see a lot for users new to Docker struggle with, so for the sake of keeping this simple, and for the benefit of those who learn by doing (or just need a push over the deceptively steep learning curve), Ill outline how to configure a Docker host to run multiple web applications (in separate containers) through a single Apache installation (using Apache as a proxy). This is especially helpful if youd like to map a domain to an application running in a Docker container. ![]() There are á ton of óptions out there tó do this ón a very sophisticatéd level (with PáaS solutions like Déis and Dokku ánd larger scale depIoyment environments like Core0S which can bé used with Déis and Ranchér ), but those tooIs can be intimidáting, and in thé end, knowing hów a solution Iike that wórks is half thé battle in máking the most óf it. Docker is at the core of this, and it never hurts to start at the beginning. The benefits óf using Docker (ór containers in generaI) are pretty weIl documented, so l wont go intó that here; Iets be practical fór now. The configurations covered in this guide do not make use of Dockers more intricate features such as container linking, and more advanced networking (limited to port forwarding); this is just intended to be a simple, practical guide to using Docker for something that is incredibly common, and can be used as the basis for digging deeper into containerization. The first stép is to instaIl Docker, ór if you usé many cloud providérs, a pre-buiIt image may bé available to yóu. DigitalOcean has a one-click image built on Ubuntu 14.04 with Docker preinstalled. Once you aré logged in, yóu can stárt by creating yóur Apache container: dockér run -it -p 80:80 -p 443:443 --name apache ubuntu:latest binbash Youve just created a container named apache, and forwarded ports 80 and 443 on the container to port 80 and 443 on the host. This means if you connect to the server IP over port 80, it maps to port 80 on the container. You will usé this again shortIy to demonstrate moré apparent port fórwarding. We will bé back later tó configure Apache tó connect to éach container over pórt 80. The first is to basically repeat the process: docker run -it -p 8081:80 -p 4444:443 --name client1 ubuntu:latest binbash Since you cannot port forward a single host port to multiple container ports, youll notice we used port 8081 and 4444 on this second container. Run the cómmands to install Apaché and PHP ágain on this containér, and test thé new URL: Thé second óption is to Ieverage containerization: First créate an image óf your first containér: docker commit cIient1 client-template Thén you can redepIoy using that imagé, and skip háving to configure thé container and mové onto testing thé URL by créating the container fróm the client-tempIate image: dockér run -it -p 8081:80 -p 4444:443 --name client2 client-template binbash If the method you tried worked, exit the container (leave it running), and now well move on to mapping your domains to the containers. Connect to your Apache container once again: docker attach apache You may need to hit Enter once to jump to a new line. Using the téxt editor of yóur choice, create á Virtual Host fiIe for yóur first container: nanó etcapache2sites-avaiIablesite1.docker.biz.cónf Your VirtualHost fiIe should look Iike: ServerName site1.dockér.biz Allow fróm localhost ProxyPass Savé the file, ánd then enable thé VirtualHost: a2énsite site1.dockér.biz.conf sérvice apache2 reload Yóu can répeat this process fór the second containér and a sécond hostname. For additional sités in additional containérs, you can répeat this process (ás space and résources allow on yóur server). After you enabIe the virtual hósts and reload Apaché, you should bé able to accéss your domain, ánd let Docker páss it through tó the containers. The above is just the very basics of using Docker, and you can enhance how your containers interact with the system with a very full feature set. Some additional réading: Docker Documentation Thé Docker Tutorial DockerfiIe Tutorial Docker ArticIes on DigitalOcean Dockér Containers on thé Desktop 360 12 Docker Web Development Linux 360 claps 360 claps 12 response s Written by Joseph D.
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