DevOps CodeLabs Multi-Container Apps http://eueung.github.io/docker-stuff/multicont

1. Swarm + Consul + Compose
Multi-Container Apps
Eueung Mulyana
http://eueung.github.io/docker-stuff/multicont
CodeLabs | Attribution-ShareAlike CC BY-SA
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2. Outline
Infrastructure & Cluster Con g - Short Recap
Another Swarm Arch
RPI Voting App
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3. Infrastructure and Cluster Config
Short Recap
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4. 4 / 30
Physical Look
node1
192.168.1.102
node2
192.168.1.101
node3
192.168.1.100

5. 5 / 30
Cluster Discovery via a
KV (Consul)

6. 6 / 30
Swarm Manager
Accesses Remote
Daemons / Engines via
Exposed Port

7. Infrastructure and Cluster Config
Another Swarm Arch
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8. 8 / 30
Using Legacy (now
Optional) Swarm Join

9. 9 / 30
It's now acctually like
this

10. $source~/.dvm/dvm.sh
$dvmuse1.10.2
NowusingDocker1.10.2
$./start-consul.shnode1.local
192.168.1.102
8b54ab3104b18f75814e5c03f89f3778acaad263f731695163cf52c95b1a4f4f
#./start-consul.sh
#---
#!/bin/bash
functiongetip(){(traceroute$12>&1|head-n1|cut-d(-f2|cut
IP_ADDRESS=$(getip$1)
echo$IP_ADDRESS
docker-H$IP_ADDRESS:2375run
-d--net=host--name=consul
-v/data-p8500:8500
hypriot/rpi-consul:0.6.4agent-server-data-dir/data-bootstrap-expect
-ui-dir=/ui
-advertise=$IP_ADDRESS-bind=$IP_ADDRESS-client=$IP_ADDRESS
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Start Consul
@ node1

11. Consul UI
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12. $./start-swarm.sh
RunningSwarmAgentat192.168.1.100
b879a04323c817432e95a970bbf71a6e03fd6ae895fa643a7fe75fd12c78d06d
RunningSwarmAgentat192.168.1.101
f47f6c6b258f8f03e1ad441049e2c4320b0a138e6d8eac52bdaa5f70ca80e72d
RunningSwarmAgentat192.168.1.102
47346d30d35d8174b41995fa34efaa69cc6d2de6c2091e29750d7e264c6d4816
de5ee57f8e20ef3ef15cd68f873620319202486510e88c1d22bfdbd8e4ec935a
#./start-swarm.sh
#---
#!/bin/bash
arr=("192.168.1.100""192.168.1.101""192.168.1.102")
IP_CONSUL="192.168.1.102"
IP_SWARMMASTER=$IP_CONSUL
forIPin"${arr[@]}";do
echo"RunningSwarmAgentat$IP"
docker-H$IP:2375run
-d--name=swarm-agent
hypriot/rpi-swarm:1.2.1
join-advertise$IP:2375
consul://$IP_CONSUL:8500
done
docker-H$IP_SWARMMASTER:2375run
-d-p10000:6000--name=swarm-master
hypriot/rpi-swarm:1.2.1manage-H0.0.0.0:6000
consul://$IP_CONSUL:8500
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Start Swarm
agent @ all nodes
manager @ node1

13. Consul UI
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14. Consul UI
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15. $exportDOCKER_HOST=tcp://192.168.1.102:10000
$dockerinfo
...
$dockerps
CONTAINERID IMAGE COMMAND CREATED
de5ee57f8e20 hypriot/rpi-swarm:1.2.1 "/swarmmanage-H0.0" 3minutesago
47346d30d35d hypriot/rpi-swarm:1.2.1 "/swarmjoin-adverti" 3minutesago
f47f6c6b258f hypriot/rpi-swarm:1.2.1 "/swarmjoin-adverti" 3minutesago
b879a04323c8 hypriot/rpi-swarm:1.2.1 "/swarmjoin-adverti" 3minutesago
8b54ab3104b1 hypriot/rpi-consul:0.6.4 "/consulagent-serve" 5minutesago
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Check

16. RPI Voting App
Credit: @jmMeessen , @dduportal
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17. 5 Containers, 2 Networks
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18. #./tag-images.sh
#!/bin/bash
dockertagthecaptainsshack/rpi-workerthecaptainsshack/rpi-worker:v1
dockertagthecaptainsshack/rpi-voting-appthecaptainsshack/rpi-voting-app:v1
dockertagthecaptainsshack/rpi-result-appthecaptainsshack/rpi-result-app:v1
dockertagthecaptainsshack/postgres-armthecaptainsshack/postgres-arm:v1
./save-images.sh
#!/bin/bash
dockersave-orpi-worker.tarthecaptainsshack/rpi-worker
dockersave-orpi-voting-app.tarthecaptainsshack/rpi-voting-app
dockersave-orpi-result-app.tarthecaptainsshack/rpi-result-app
dockersave-opostgres-arm.tarthecaptainsshack/postgres-arm
#./load-images.sh
#!/bin/bash
dockerload-irpi-worker.tar
dockerload-irpi-voting-app.tar
dockerload-irpi-result-app.tar
dockerload-ipostgres-arm.tar
sftp>mkdirvoting
sftp>put-rvoting
$rm-fvoting/*&&rmdirvoting
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Optional
Preparation
tag, save, load

19. db:
image:thecaptainsshack/postgres-arm:v1
volumes:
-db-data:/var/lib/postgresql/data
networks:
-back-tier
result-app:
image:thecaptainsshack/rpi-result-app:v1
ports:
-"5001:80"
links:
-db
networks:
-front-tier
-back-tier
volumes:
db-data:{}
networks:
front-tier:
driver:overlay
back-tier:
driver:overlay
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docker-compose.yml
version:'2'
services:
voting-app:
image:thecaptainsshack/rpi-voting-app:v1
ports:
-"5000:80"
links:
-redis
networks:
-front-tier
-back-tier
redis:
image:hypriot/rpi-redis:3.0.4
expose:["6379"]
networks:
-back-tier
worker:
image:thecaptainsshack/rpi-worker:v1
depends_on:
-db
-redis
networks:
-back-tier

20. $docker-composeup-d
Creatingnetwork"voteapps_front-tier"withdriver"overlay"
Creatingnetwork"voteapps_back-tier"withdriver"overlay"
Creatingvolume"voteapps_db-data"withdefaultdriver
Creatingvoteapps_redis_1
Creatingvoteapps_db_1
Creatingvoteapps_voting-app_1
Creatingvoteapps_worker_1
Creatingvoteapps_result-app_1
$dockerps
CONTAINERID IMAGE COMMAND CREATE
13390ae07634 thecaptainsshack/rpi-result-app:v1 "nodeserver.js" 14sec
fb7788e21dcf thecaptainsshack/rpi-worker:v1 "java-jar/worker-ja" 14sec
02da4fd6d395 thecaptainsshack/postgres-arm:v1 "/docker-entrypoint.s" 19sec
9271161cffd0 hypriot/rpi-swarm:1.2.1 "/swarmmanage-H0.0" 2minu
5094d356a141 hypriot/rpi-swarm:1.2.1 "/swarmjoin-adverti" 2minu
43c6c9914167 hypriot/rpi-swarm:1.2.1 "/swarmjoin-adverti" 2minu
38dc46794c30 hypriot/rpi-consul:0.6.4 "/consulagent-serve" 2minu
4952e24ce452 thecaptainsshack/rpi-voting-app:v1 "pythonapp.py" 10hou
ac998b65792c hypriot/rpi-redis:3.0.4 "/entrypoint.shredis" 10hou
94e83aa038b1 hypriot/rpi-swarm:1.2.1 "/swarmjoin-adverti" 10hou
#restartifnecessary
$docker-composestop&&docker-composerm-f
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Ready for
Show

21. $docker-composeps
Name Command State Ports
----------------------------------------------------------------------------------------
voteapps_db_1 /docker-entrypoint.shpostgres Up 5432/tcp
voteapps_redis_1 /entrypoint.shredis-server Up 6379/tcp
voteapps_result-app_1 nodeserver.js Up 192.168.1.100:5001->
voteapps_voting-app_1 pythonapp.py Up 192.168.1.101:5000->
voteapps_worker_1 java-jar/worker-jar-with... Up
root@node3in~
$dockernetworkls
NETWORKID NAME DRIVER
8add79af5bf7 voteapps_front-tier overlay
c9c8503da2d8 voteapps_back-tier overlay
f0dce7240349 docker_gwbridge bridge
8cbe7e085fad none null
ec272b59cfd7 host host
4592696ebf19 bridge bridge
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Ready for
Show

22. voting-app
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23. $dockerlogs-f2de6
Connectedtoredis
Watchingvotequeue
Processingvotefor'a'by'84a51f315b69e04a'
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redis log

24. result-app
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25. voting-app
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26. $dockerlogs-f2de6
Connectedtoredis
Watchingvotequeue
Processingvotefor'a'by'84a51f315b69e04a'
Processingvotefor'a'by'84a51f315b69e04a'
Processingvotefor'b'by'8f3ee350c2aec3f5'
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redis log

27. result-app
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28. Refs
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29. Refs
1. jmMeessen/rpi-voting-app: A dockerized voting application demo, adapted for
Raspberry PI
2. @dduportal - Swarm on Raspberry Pis
3. docker/example-voting-app: Example Docker Compose app
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30. END
Eueung Mulyana
http://eueung.github.io/docker-stuff/multicont
CodeLabs | Attribution-ShareAlike CC BY-SA
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