Landing the Docker

transcript

Landing the Docker

Kunpeng Yang & Mark Shao

Agenda• Introduction of Docker

– What is Docker– What Docker is all about

• Our problems• Solution

– Solution with vSphere– Solution with Docker– Benefit/Limitation– Pagrant

• Tips to Share & Lesson learnt

Docker is an open-source engine that automates the deployment of any application as a lightweight, portable, self-sufficient container that will run virtually anywhere.

What is Docker• Open Source engine to commoditize LXC• Using AUFS for quick provision• Standard format for containers: Layers• Allowing to create and share images

What Docker is all about• Deployment and Delivery• DevOps• Test• ...

Our problems• 3000 automated test cases• 4-5 hours duration regression• Dirty data cause unreliable test result

Solution with vSphere• Save VMs (Client, Server, DB) as

template• Use Soap-based ws to do

provision • Provision a couple of templates at

same time• Build code and transfer it to the

multiple client machine

Click icon to add picture

Issues• Provision cost 1/3 time of regression• Big efforts to maintain template• Difficult to add dependency between VMs in

same template

One day we meet Docker

Solution with Docker• Use containers instead of VMs• Invoke provision by REST in JSON• Share the folder between container and host

server• Handle libs dependency once and share it in all

containers• Share the xml report from slave with host

server

Benefits/Limitation• Benefits

– Free & Open-source– Provision in seconds– Easy to maintain images (AUFS layers)– Add dependency by adding link between containers

• Limitation– Windows– Integration with IAAS

Pagrant• A small tool we build to easily scale out the

slaver nodes• Easy to control both the master and slaver

nodes through Pagrant• Some other features for distributed test.

1 2 4 6

Benchmark node/time cost

Tips to Share & Lesson learnt

Private registry• The download speed too slow from `index`• Enterprise security• Easy to share the images internally• https://github.com/dotcloud/docker-registry

Don’t be reluctant to report issue

Community is always ready to help• Problem faced with linking containers• Link the containers via name• export the environment variables for service

host and port in the target container

Community is always ready to help (cont)

TestNG support distributed execution?

Patch on TestNG• Deprecate the huge serializable object during

communication• Dispatch according to Test by default• Accumulate the xml reports from slavers and

generate the final merged report at end

Docker has landed

Landing the Docker

Documents