Containing Atlassian - Speaker Deck

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Containing Atlassian Running the Atlassian Suite with Docker

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David McKay @rawkode Software Consultant Serial Meetup Organiser

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Containing Atlassian

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Why Containers?

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Containment for neatness

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Containment for security

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Containment for speed

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Why Docker?

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Because it’s a trendy

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Because it’s good on the CV

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Because all your friends are doing it

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No content

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Docker OK; I’m Serial Now ● Industry Leader ● Always Evolving ● Proven at Scale ● Tooling for all environments ● OCI / runC ● Official Images

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Vocabulary ● Dockerfile ● Image ● Container

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Dockerfile FROM ubuntu:16.10 RUN apt-get update RUN apt-get install x y z CMD java

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Docker Image $ docker build -t acme/jira:7.0 .

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Docker Images $ docker images REPOSITORY TAG IMAGE ID CREATED SIZE elixir 1.3 b80c8e9d71f9 3 weeks ago 758.7 MB acme/jira 7.0 e552540688e1 4 weeks ago 224.4 MB alpine 3.4 ee4603260daa 4 weeks ago 4.803 MB

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Docker Container $ docker run acme/jira:7.0

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Orchestration With Docker Swarm Mode

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Swarm Mode ≇ Swarm

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Vocabulary ● Node ● Manager ● Worker ● Service

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Creating a Swarm $ docker swarm init

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Joining a Swarm $ docker swarm join --token xxxx 192.168.66.100:2377

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Creating a Service $ docker service create --name jira acme/jira:7.0

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Creating Services $ docker service create --name crowd acme/crowd:2.10 $ docker service create --name jira acme/jira:7.0 $ docker service create --name confl.. acme/confluence:5.10

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Scaling

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Scaling a Service $ docker service scale jira=4

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Service Discovery

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Scaling a Service $ wget http://jira:8080 $ wget http://confluence:8081

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Oh yeah, and you get load balancing for free ...

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Upgrading

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Scaling a Service $ docker service update --image acme/jira:10.1 jira

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Potential Problems

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Configuration

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Configuration $ docker service create --env DB_HOST=postgres $ docker service update --env-add DB_HOST=postgres

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Persistence

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Persistence $ docker service create --mount \ type=mount, source=/mnt/volume, destination=/path/in/container

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⚖ How can I scale this?

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Scaling the Persistence NFS / Fuse mount on all nodes Feeling fancy? Check out CernVM-FS!

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This brings other problems

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With the Atlassian Suite You can deal with it, as most writes to the disk are simply cache! Except BitBucket