This document summarizes a meetup about a PaaS built with Docker. It discusses the core components used including Ceph, Etcd, Fleet and Flannel. It provides examples of using the Deis PaaS CLI to deploy and manage applications similarly to Heroku including creating an app, pushing code, scaling, configuring, running one-off commands and viewing logs. The Deis PaaS aims to provide a simpler deployment experience for Docker applications compared to directly using Docker.

1. A PaaS built with Docker
Meetup #3 @Wayra
18/Nov/2014

2. BE STRONG
flickr.com/gridview

3. Strong Philosophy:
Shipping
(Portability)
flickr.
com/wallyonwater54

4. Strong Philosophy:
Distribution
Grabthar flickr.com/42311564@N00/

5. Strong Philosophy:
Scalability
Samuel Mann flickr.com/21218849@N03/

6. Strong Philosophy:
Twelve Factor
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7. ● Rados Gateway
○ REST Objects
(S3 e Swift)
● RBD
○ Block Storage
● CephFS
○ POSIX Sharing

8. Confd Confd Confd Confd Confd
Etcd
Fleet
Systemd Systemd Systemd Systemd Systemd
Flannel
eth0 eth0 eth0 eth0 eth0
Node 1 Node 2 Node 3 Node 4 Node 5

9. Fleet

10. ● Fleet
Distributed
“Services”
[Unit]
Description=deis-controller
Requires=deis-store-volume.service
After=deis-store-volume.service
[Service]
EnvironmentFile=/etc/environment
TimeoutStartSec=20m
ExecStartPre=/bin/sh -c "IMAGE=`/run/deis/bin/get_image /deis/controller` &&
docker history $IMAGE >/dev/null || docker pull $IMAGE"
ExecStartPre=/bin/sh -c "docker inspect deis-controller >/dev/null && docker rm -f
deis-controller || true"
ExecStart=/bin/sh -c "IMAGE=`/run/deis/bin/get_image /deis/controller` && docker
run --name deis-controller --rm -p 8000:8000 -e EXTERNAL_PORT=8000 -e
HOST=$COREOS_PRIVATE_IPV4 -v /var/run/fleet.sock:/var/run/fleet.sock -v
/var/lib/deis/store:/data $IMAGE"
ExecStopPost=-/usr/bin/docker rm -f deis-controller
Restart=on-failure
RestartSec=5
[Install]
WantedBy=multi-user.target

11. WWHD
(What Would Heroku Do)
● Limitations

12. $ deisctl config platform
set domain=mylocalpaas.com
$ deisctl install platform
$ deisctl start platform
● Installation

13. $ pip install deis
$ deis register http://mylocalpaas.com
$ deis keys:add
● Install client

14. ● Simpler deploy
$ mkdir myapp ; cd myapp
$ deis create myapp
$ deis pull rochacon/ifconfigme
Creating build... done, v2
$ curl myapp.mylocalpaas.com
192.168.20.219

15. ● Docker deploy
Instead of “docker build”
# create the app
$ deis create myapp
# push it
$ git push deis master
-----> Building Docker image
-----> Pushing image to private registry
-----> Launching...
done, myapp:v1 deployed to Deis
http://myapp.mylocalpaas.com
# use it
$ curl http://myapp.mylocalpaas.com
Hello

16. ● Scale it
$ deis scale cmd=5
Scaling processes... but first, coffee!
..o
done in 25s
=== myapp Processes
--- cmd:
cmd.1 up (v13)
cmd.2 up (v13)
cmd.3 up (v13)
cmd.4 up (v13)
cmd.5 up (v13)

18. ● Heroku App
Available Buildpacks:
● Ruby
● Nodejs
● Java
● Gradle
● Grails
● Play
● Python
● Clojure
● PHP
● Go
● Meteorite
● Perl
● Scala
● Dart
● Nginx
● Apache

19. ● using deis
deis config

20. ● using deis
deis run ( runs in an ephemeral container!)

21. ● using deis
deis limits

22. ● using deis
deis releases / deis rollbacks

23. ● using deis
deis logs

24. ● using deis
deis domains

25. Thanks!
lorieri
@againstty0
ft.
@rochacon
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