making sense out of amazon ecs

MAKING SENSE OUT OF AMAZON ECS

Swapnil DahiphaleDevOps Engineer

13 Feb 2016, DevOps Meetup Banglore

WhiteHedge

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INTRODUCTION - HELLO

WhiteHedgeHello! Welcome to WhiteHedge

Our Work , Our ClientsWhiteHedge is an Agile Software Product Development company. But what reallydescribes us is what we think about Our Work , Our Clients.

We have deep experience in some of the most sought-after technology domains in theindustry today: Mobile Development, Big Data Analytics, Cloud Computing, andDevOps. Having deep knowledge in these domains make us stand out as the best andthe coolest provider of services. Our DevOps will bring you a single team that workstogether with continuous development, continuous testing, continuous deployments,logging, monitoring and security.

WhiteHedge

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WHITEHEDGE - AN OVERVIEW

Global Presence

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Agile + Flexible

Thorough + Quick Learner

Competitive + Comprehensive

Honest + Transparent

Young + Mature

Innovative + Creative

More about us …What defines us ?

California

New Jersey Rotterdam

Pune

Envision Products | Convert into businesses

100+ employees | 50+ live products world-wide

The best of the Talent and Infrastructure

Started 2003 | Focused Agile Product Development

Self funded | Well funded | Profitable

WhiteHedge

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TABLE OF CONTENTS - OUR AGENDA

Containers

1

Use case

2

Orchestration

3

Introduction to ECS

4

Key Components

6

Architecture

7

Overview of Build Process

8

Why ECS?

5

CONTAINERS

WhiteHedgeWHAT ARE CONTAINERS?

OS virtualization

Process isolation

Images

Automation

Bins/Libs

Docker Engine

Bins/Libs

App2App1

Host OS

Server

Guest OS

Hypervisor

Guest OS

Bins/LibsBin/Libs

Host OS

Server

App1 App2 Container 1 Container 2

VM 1 VM 2

WhiteHedge

“automates the deployment of anyapplication as a lightweight,portable, self-sufficient containerthat will run virtually anywhere”

CONTAINERS

USE CASE

WhiteHedgeUSE CASE

A highly available RESTful API server which fetchesdata from third-party services and serves its clients.

WhiteHedgeARCHITECTURE

WhiteHedgeCONTINUOUS DELIVERY WITH JENKINS

Build Image

Push Image

CodeDeploy

WhiteHedgeTHE PROBLEM

• A large monolithic application that was difficult to run, deploy, and scale.

• We were deploying a single docker container to run multiple processes.

• Docker was monitored and we were redeploying docker instance if the docker instance runs into problems.

• We used to evaluate capacity of EC2 instance manually and are running one container per instance

WhiteHedgeTHE CHALLENGE

• Use microservices architecture using docker

• Orchestration of dockers

• Replicate infrastructure to many regions

ORCHESTRATION

WhiteHedgeORCHESTRATION

Bins/Libs

Docker Engine

App1

Host OS

Server

Bins/Libs

App2

WhiteHedgeORCHESTRATION

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Docker Engine

Host OS

Server

Why EC2 Container Service?

WhiteHedgeWHY ECS?

• It is a managed service!

•Easy to integrate with other AWS services

• It is great for storing and enforcing task state

•Designed with custom schedulers in mind

•The agent code is available on a public GitHub repo and … it is in GO!

WhiteHedgeWHAT ELSE DID WE LOOK AT?

Home-grown Tech

Tried, but proved to be unreliable

Difficult to handle coordination and synchronization

Powerful but hard to productionize

Needs developers with Experience

Not a managed service, higher Opsload

“Amazon ECS enabled us to focus on releasing new software rather than spending time managing clusters”

Introduction to ECS

WhiteHedge

“a highly scalable, high performance containermanagement service that supports dockercontainers and allows you to easily run and manageDocker-enabled applications across cluster of EC2instances”

WHAT IS ECS?

WhiteHedgeWHAT IS ECS?

• Building Block Service

• Easily Manage Clusters for Any ScaleNothing to runComplete stateControl and monitoringScale

• Flexible Container Placement• Designed for use with other AWS services• Secure• Extensible - Comprehensive APIs

WhiteHedgeKEY COMPONENTS

Container Instances

Clusters

Tasks

Run a task

Create a service


• Amazon EC2 Instances

• Docker daemon

• Amazon ECS agent

Container InstancesClusters

Tasks

Run a task

Create a service


• Grouping of Container

Instances

• Resource pool

• Regional

• Start empty, dynamically

scalable

Container Instances

ClustersTasks

Run a task

Create a service


• Unit of work

• Grouping of related

Containers

• Run on Container Instances

Container Instances

Clusters

TasksRun a task

Create a service

WhiteHedgeKEY COMPONENTS: TASK DEFINITIONS

{"environment": [],"name": "simple-demo","image": "my-demo", "cpu": 10,"memory": 500, "portMappings": [

{"containerPort": 80,"hostPort": 80

}],"mountPoints": [

{"sourceVolume": "my-vol", "containerPath":"/var/www/my-

vol"}

],"entryPoint": [

"/usr/sbin/apache2", "-D","FOREGROUND"

],"essential": true

},

{"name": "busybox","image":"busybox", "cpu": 10,"memory": 500, "volumesFrom": [{"sourceContainer": "simple-demo"}],"entryPoint"

: [ "sh","-c"

],"command": [

"/bin/sh -c \"while true; do/bin/date > /var/www/my-vol/date; sleep 1;done\""

],"essential": false

}

WhiteHedge

{"environment": [],"name": "simple-demo","image": "amazon/amazon-ecs-sample", "cpu": 10,"memory": 500, "portMappings":[


}],"mountPoints": [

{"sourceVolume": "my-vol", "containerPath":"/var/www/my-

vol"}

],"entryPoint": [

"/usr/sbin/apache2", "-D","FOREGROUND"

],"essential": true

},

KEY COMPONENTS: TASK DEFINITIONS

Essential to ourtask

10 CPU units (1024 is full CPU), 500 megabytes ofmemory

Expose port 80 in containerto port 80 on host

Create and mount volumes

WhiteHedge

{"name": "busybox","image":"busybox", "cpu": 10,"memory": 500, "volumesFrom": [{"sourceContainer": "simple-demo"}],"entryPoint"

: [ "sh","-c"

],"command": [

"/bin/sh -c \"while true; do/bin/date > /var/www/my-vol/date; sleep 1;done\""

],"essential": false

}

KEY COMPONENTS: TASK DEFINITIONS

[{

"image": "tutum/wordpress-stackable", "name": "wordpress","cpu": 10,"memory": 500,"essential": true, "links": [

"db"],"entryPoint": [

"/bin/sh","-c"

],"environment": [

…],"portMappings": [


}]

},]

From Docker Hub

Mount volume from othercontainer

Command toexec


Good for short-lived containers,

e.g. batch jobs

Container Instances

Clusters

Tasks

Run a taskCreate a service


Good for long-running

applications and services

Container Instances

Clusters

Tasks

Run a task

Create a service

Typical user workflow

WhiteHedgeTYPICAL USER WORKFLOW

I want to run aservice


Run Instances AmazonEC2

Use custom AMI with Docker support and ECS Agent. Instances will register with default cluster.


Create Task Definition

Declare resourcerequirements forcontainers

Shared DataVolume

Node.jsApp Time of day App


Create Service

Declare resourcerequirements forservice

Shared DataVolume

Node.jsApp Time of day App

Elastic Load

Balancing

X 3


Describe Service

Architecture with ECS

WhiteHedgeARCHITECTURE

WhiteHedgeCONTINUOUS DELIVERY WITH JENKINS

Build Image

Push Image

Update ECS service

WhiteHedge

Features Without ECS Using ECS

High availability If any of the container dies, we

have to redeploy on all servers.

Restarts that container itself.

(Its a cluster management

system so it will always be in

desired state)

Managing number of

containers on a given EC2

instance

It will be complicated to run

and manage multiple

containers effectively.

Can manage multiple

containers.

Deployment method Handle deployments using

various methods.

(CodeDeploy, chef etc.)

ECS manages deployment of

new revision.

COMPARISON OF ARCHITECTURES

WhiteHedge

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Questions?

http://www.whitehedge.com/devops.htmlSwapnil Dahiphale

[email protected]

- SOCIAL NETWORKS / PHONE

THANK YOU!Have a Nice Day!

Swapnil Dahiphale

@Swapnil2233

[email protected]

making sense out of amazon ecs

Technology