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Docker & Diego - good friends or not? | anynines
Diego & Docker can work together but their friendship has issues. Diego allows Cloud Foundry to run Docker containers by treating Docker containers as Garden containers. However, using both together adds complexity since developers must build Docker images, push them to a registry, and deploy each Dockerized app separately to Cloud Foundry rather than with a single command. While together they provide deployment options, simplifying the process would improve their relationship.
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Docker & Diego - good friends or not? | anynines
- 1. Diego & Docker- Good friends or not ?
- 3. • DevOps Engineer@anynines • Used to work with Java (monoliths) • Got to know Node.js and Microservices • Learned about CloudFoundry • Can I push my Container to CF ?
- 4. Why even useDocker ?
- 6. Code Dockerfile Docker Imagedocker build Dockercontainer Code docker run Docker hub
- 7. Docker hub Docker ImageDockerImageDocker Image
- 8. Developer machine Docker container Code node0.12 Docker Image Docker hub Docker ImageDocker Image new Developer machine test/staging/production machine Docker container Code Docker container Code node 6.3.0 node 5.0.0 node 5.0.0 node 5.0.0 node 5.0.0 Docker Image
- 9. Why even useCloud Foundry ?
- 10.
- 11. Developer machine Code Cloud Foundry Instance cfscale APP -i 4 Instance Instance Instance
- 12.
- 13.
- 14. Garden Container Garden Linux creates DockerImage Filesystem Commands
- 15. Why even useDocker & CloudFoundry
- 16.
- 17. Spin it up $docker run -d -p 27017:27017 mongo $ cd ../importer $ PORT=… MOVIE_DB_HOST=… MOVIE_DB_PORT=… npm start $ cd ../recommender $ PORT=… MOVIE_DB_HOST=… MOVIE_DB_PORT=… npm start $ cd db $ PORT=… MOVIE_MONGO_URI=mongodb://192… npm start $ docker pull mongo
- 18. Docker Container Docker ContainerDockerContainer Importer Docker Container MongoDB (Movies) DBWrapper Recommender Docker Container MongoDB (Subscriber)
- 21. Spin it upwith Docker $ docker-compose up
- 22. Importer Docker Container MongoDB (Movies) DBWrapper Recommender Docker Container MongoDB (Subscriber) $MONGO_URI=… npm start local $ MOVIE_DB_HOST=… npm start $ MOVIE_DB_HOST=… npm start
- 23.
- 24.
- 25.
- 26.
- 27. Deploy it onCloud Foundry $ docker build -t mebnoah/moviez_db . $ docker push mebnoah/moviez_db $ cf push --docker-image mebnoah/moviez_db $ cd db $ cd ../importer $ docker build -t mebnoah/moviez_importer . $ docker push mebnoah/moviez_importer $ cf push --docker-image mebnoah/moviez_importer $ cd ../recommender $ docker build -t mebnoah/moviez_recommender . $ docker push mebnoah/moviez_recommender $ cf push --docker-image mebnoah/moviez_recommender
- 29. State of theonion
- 30. Spin it upwith just 1 command
- 31. • Build eachDocker image explicitly • Register on Docker Hub and push each image • Push each app separately to CF
- 32. You decide wetherto push a micro service with or without docker !
- 33. I would pushit without docker
- 34. Spin it upwith just 1 command
- 36. Push it toCF with just 1 command
- 38.
- 39. There is afriendship but it’s not a good one
- 40.
- 42.
Editor's Notes
- #2 • I want to take you on a journey of me asking myself if docker and diego/CloudFoundry are good friends • First of all let me tell you a little bit about me and why I want to take you on that journey
- #4 * Lets answer some question first
- #5 * 3 Advantages
- #9 Works on my machine -> works on every other machine New Devs -> increase productivity, no complicated setup Other machines -> test machine, staging -> supports continuous integration/deployment Even on production -> remember 12Factors dev/prod parity ?! there you have it ! I will mention the other 2 Advantages later on
- #12 Auto Healing Marketplace for backing services (PCF from scratch, OS CF + anynines)
- #13 Why can we even use docker in diego ?
- #14 Garden Linux supports mounting Docker images as root file system for container it constructs Therefore Garden Linux uses the same libraries that power docker
- #15 * Warden Linux couldn't do that
- #16 therefore I want to show you a litte micro service architecture I implemented at the beginning I wanted to play around with seneca
- #17 importing movies from a movie database in my own db Register with email address to recommender -> sends recommendation (random movie) every day 1 Second advantage of docker: docker pull mongo
- #18 * But i decided to dockerize the micro services because of the advantages I talked before (other dev can start easily, can deploy everywhere)
- #21 env file
- #22 third advantage of docker this was the state of my micro service landscape as I joined anynines I wanted to deploy the landscape on Cloud Foundry -> Changes regarding 12Factor (basically get stuff out of VCAP_SERVICES Env variables)
- #23 Switch for local & cloud profile Nothing changes for running it with docker, because development profile is default 2. Kästchen
- #25 For production you would probably use a service discovery/registry like consul/eureka
- #27 Why do I need docker anymore ? Lets try to deploy to deploy it and see what i get
- #28 * Note: only images from accessible docker registry are supported as far as I know, so u have to register and upload your image
- #29 man muss build pack weglassen
- #31 dont have to deploy it to CF or start every service separately in order to test new changes -> local development/testing -> new Devs -> it will run
- #32 because there are 3 Micros -> thats not really awesome
- #39 * Both Technologies support it
- #40 It can be improved if mainfest files support docker-images, but still I can’t think of any advantage of deploying docker images