OSGi Community Event 2016 Presentation by David Bosschaert (Adobe) & Carsten Ziegeler (Adobe) Docker is enjoying immense popularity today for deployment of nearly any type of app and new platforms that support Docker appear on a regular basis. While supporting Docker natively, many platforms have specific APIs to get them to work. As a dev you don’t want to lock yourself in to any of these. You want to keep the option open to switch to target platforms if the need arises. This talk outlines the OSGi Compute Management Service RFP 179 that abstracts over mechanisms to create and launch container nodes. It shows a system that allows you to swap Docker deployment platforms without the need to change your deployment management code. We’ll also talk about how OSGi Cloud Ecosystems RFC 183 can be used in this context for discovery of services, containers and frameworks.

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Dockerizing for the Deployment Platform of the Month - with
OSGiCarsten Ziegeler & David Bosschaert | Adobe

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David Bosschaert
 Adobe R&D Ireland
 OSGi EEG co-chair
 Apache member and committer
 ISO JTC1 SC38 (Cloud Computing) Ireland committee member
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Carsten Ziegeler
 RnD Adobe Research Switzerland
 Member of the Apache Software Foundation
 VP of Apache Felix and Sling
 OSGi Expert Groups and Board member
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Create...
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Containers to the Rescue
 Rapid / Simplified application deployment
 Lightweight, reduced overhead
 Portability across machines
 Sharing
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Application Canning
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 OSGi app == Java App
 Various solutions
 Apache Karaf
 Distribution
 Apache Sling
 Launchpad
 Provisioning Model

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Common Setup
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OSGi Framework Launcher
Initial Bundles / Configuration
Runtime Provisioning
<feature name="my-project" version="1.0.0">
<bundle>mvn:com.mycompany.myproject/myproject-
dao</bundle>
<bundle>mvn:com.mycompany.myproject/myproject-
service</bundle>
<config name="com.foo.bar"/>
</feature>
[feature name=“my-project“]
com.mycompany.myproject/myproject-dao/1.0.0
mvn:com.mycompany.myproject/myproject-service/1.0.0
[configurations]
com.foo.bar

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OSGi Goodies
 Modularity
 Requirements and Capabilities
 Explicitly declare and isolate dependencies
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Run...
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Yay dockerize your app!
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docker container 1
App
client
docker container 2
App
docker container 3
App
?

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You need a load balancer
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docker container 1
App
docker container 2
App
docker container 3
App
client LB

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Example deployment: Sling Containers!
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docker container 1
Sling
docker container 2
Sling
docker container 3
Sling
client LB

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Manage...
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Solutions
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Docker Swarm
Amazon ECS

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Here’s how…
 Docker Swarm/Compose
 docker-compose up –d
 docker-compose scale mysling 3
 DC/OS Marathon
 curl -i -H 'Content-Type: application/json' -d @<mysling.json> http://mymarathon:8080/v2/apps
 Kubernetes
 kubectl run mysling-node --image=cziegeler/apacheslingdemo --port:8080
kubectl expose deployment mysling.node --type="LoadBalancer"
 Amazon ECS
 aws ecs register-task-definition --family myslingfam --container-definitions
‘[{"name":"mysling”,"image":"cziegeler/apacheslingdemo","cpu":1,"memory":512,"essential":tru
e}]’
 aws ecs create-service --service-name myslingsvc --task-definition myslingfam --desired-count 3
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yaml
json

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Everybody takes Docker containers
 ... but applications are defined using various proprietary APIs
 makes it very labour intensive to switch
 can we have a common API please?
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Or how about a common API
ContainerFactory cf = … from service registry …
LoadBalancerConfig lbCfg = LoadBalancerConfig.builder().
port(80).
pingLocation("/slingshot.html").build();
ContainerGroupConfig config = ContainerGroupConfig.builder("mysling",
"cziegeler/apacheslingdemo").
cpu(1).
memory(512).
instances(3).
loadBalancer(lbCfg).
port(8080, true).build();
Service svc = cf.getService(config);
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Demo!
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OSGi RFP 179 – Compute Management Service
 Accepted OSGi RFP
 Independent API to manage compute nodes
 Can work with RFC 183
 Cluster Information Specification
 (previously Cloud Ecosystems)
 Node discovery, metadata and provisioning
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Discussion
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