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Docker cr ineta-20150601
- 1. Docker
- 2. Chris Ortman University of Iowa @chriso chrisortman
- 3. Jerry Steele • Historic 2008 floods begat epic cooperation between civic leaders, business, universities, community colleges, and startups • Making “We Create Here” meaningful & accessible
- 7. 1. Install and run any application with a single command 2. GIT for servers 3. Executable setup documentation 4. Isolate development environments and tools
- 10. Key Component: Registry Registry is a storage location where you can pull and push preconfigured images that are ready to go. An example is DockerHub, but you can also host your own pretty easily.
- 13. –me “It’s like git, but for servers”
- 14. docker run -d --publish 8080:8080 cptactionhank/atlassian-jira
- 15. Key Component: Image Image is a readonly template that contains your operating system files. You can create new images by commiting your changes to a container.
- 16. DEMO 2 images
- 18. Key Component: Dockerfile Dockerfile is a Makefile for your image.
- 19. –Wayne Mack c2wiki http://c2.com/cgi/wiki? TestsAreAnExecutableSpecification “The key advantage of a test set as proposed in TestFirstDesign as a specification is that it is unambiguously verifiable against the code. ”
- 21. Isolation
- 22. Key Component: Container Container is your virtualized operating system. It uses namespaces, control groups, and union file systems to provide isolation for applications.
- 23. docker@boot2docker:~$ df -h Filesystem Size Used Available Use% Mounted on tmpfs 1.8G 94.5M 1.7G 5% / tmpfs 1002.1M 324.0K 1001.8M 0% /dev/shm /dev/sda1 18.2G 6.8G 10.4G 40% /mnt/sda1 cgroup 1002.1M 0 1002.1M 0% /sys/fs/cgroup none 464.8G 299.6G 165.1G 64% /Users /dev/sda1 18.2G 6.8G 10.4G 40% /mnt/sda1/var/lib/docker/aufs none 18.2G 6.8G 10.4G 40% /mnt/sda1/var/lib/docker/aufs/mnt/ 431abd58c10b5560fee38b4dab8f6121f2f5b3f9475298e90b184caa423dd369 none 18.2G 6.8G 10.4G 40% /mnt/sda1/var/lib/docker/aufs/mnt/2342b6aa2e395dd9dd root@2342b6aa2e39:/# df -h Filesystem Size Used Avail Use% Mounted on none 19G 6.9G 11G 40% / tmpfs 1003M 0 1003M 0% /dev shm 64M 0 64M 0% /dev/shm /dev/sda1 19G 6.9G 11G 40% /etc/hosts tmpfs 1003M 0 1003M 0% /proc/kcore tmpfs 1003M 0 1003M 0% /proc/timer_stats daemon@431abd58c10b:/var/local/atlassian/jira$ df -h Filesystem Size Used Avail Use% Mounted on none 19G 6.9G 11G 40% / tmpfs 1003M 0 1003M 0% /dev shm 64M 0 64M 0% /dev/shm /dev/sda1 19G 6.9G 11G 40% /etc/hosts
- 24. DEMO 4 containers, data volumes, and links
- 25. What we’ve learned • Download and run pre-configured applications • Create images and share them • Persist data • Connect containers
- 26. • Registry is a storage location where you can pull and push preconfigured images that are ready to go. • Image is a readonly template that contains your operating system files. • Dockerfile is a Makefile for your image. • Container is your virtualized operating system.