Docker & Diego - good friends or not? | anynines
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Learn about using Docker and Diego in connection with Cloud Foundry
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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 use Docker ?
- 6. Code Dockerfile Docker Imagedocker build Docker container Code docker run Docker hub
- 7. Docker hub Docker ImageDocker ImageDocker Image
- 8. Developer machine Docker container Code node 0.12 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 use Cloud Foundry ?
- 11. Developer machine Code Cloud Foundry Instance cf scale APP -i 4 Instance Instance Instance
- 14. Garden Container Garden Linux creates Docker Image Filesystem Commands
- 15. Why even use Docker & CloudFoundry
- 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 ContainerDocker Container Importer Docker Container MongoDB (Movies) DBWrapper Recommender Docker Container MongoDB (Subscriber)
- 21. Spin it up with 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
- 27. Deploy it on Cloud 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 the onion
- 30. Spin it up with just 1 command
- 31. • Build each Docker image explicitly • Register on Docker Hub and push each image • Push each app separately to CF
- 32. You decide wether to push a micro service with or without docker !
- 33. I would push it without docker
- 34. Spin it up with just 1 command
- 36. Push it to CF with just 1 command
- 39. There is a friendship but it’s not a good one
- 40. Questions ?
Editor's Notes
- • 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
- * Lets answer some question first
- * 3 Advantages
- 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
- Auto Healing Marketplace for backing services (PCF from scratch, OS CF + anynines)
- Why can we even use docker in diego ?
- Garden Linux supports mounting Docker images as root file system for container it constructs Therefore Garden Linux uses the same libraries that power docker
- * Warden Linux couldn't do that
- therefore I want to show you a litte micro service architecture I implemented at the beginning I wanted to play around with seneca
- 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
- * But i decided to dockerize the micro services because of the advantages I talked before (other dev can start easily, can deploy everywhere)
- env file
- 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)
- Switch for local & cloud profile Nothing changes for running it with docker, because development profile is default 2. Kästchen
- For production you would probably use a service discovery/registry like consul/eureka
- Why do I need docker anymore ? Lets try to deploy to deploy it and see what i get
- * Note: only images from accessible docker registry are supported as far as I know, so u have to register and upload your image
- man muss build pack weglassen
- 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
- because there are 3 Micros -> thats not really awesome
- * Both Technologies support it
- It can be improved if mainfest files support docker-images, but still I can’t think of any advantage of deploying docker images