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ECS and Docker Demo

Propedeutical Tasks

Launch Monitoring application

npm -d install
npm start

Create Infrastructure (ECS Cluster and ALB)

aws cloudformation create-stack --stack-name UniRoma2-ECS --template-body file://./infrastructure-ecs/ecs.json --parameters file://./infrastructure-ecs/parameters.json

aws cloudformation create-stack --stack-name UniRoma2-ALB-Blue --template-body file://./infrastructure-alb/alb.json --parameters file://./infrastructure-alb/parameters.json

Build, Test and Run a Container

Build and push Microservices ONE

docker-compose -f python-microservice-one/docker-compose.yml build
docker-compose -f python-microservice-one/docker-compose.yml push

Build and push Microservices TWO

docker-compose -f python-microservice-two/docker-compose.yml build
docker-compose -f python-microservice-two/docker-compose.yml push

Up&Running the Microservices ONE and TWO in local

docker-compose -f python-microservice-one/docker-compose.yml up
docker-compose -f python-microservice-two/docker-compose.yml up

Pattern 1: Use ecs compose CLI

Register cluster

ecs-cli configure --cluster UniRoma2-ECSCluster-1JYA72NORCX8

Launch services

ecs-cli compose -f python-microservice1/docker-compose.yml service up
ecs-cli compose -f python-microservice2/docker-compose.yml service up

Scale services

ecs-cli compose -f python-microservice1/docker-compose.yml service scale 2
ecs-cli compose -f python-microservice2/docker-compose.yml service scale 2

Scale cluster

aws autoscaling set-desired-capacity --auto-scaling-group-name UniRoma2-ECSAutoScalingGroup-K76B7PJC
483 --desired-capacity 6 --honor-cooldown

Resume

PRO: porting from compose to ecs CONTRO: no possible to attach service to ALB/ELB

Pattern 2: Use ecs compose CLI and standard CLI

Create Task

Creates an ECS task definition from your compose file.

ecs-cli compose -f python-microservice-one/docker-compose.yml create
ecs-cli compose -f python-microservice-two/docker-compose.yml create

Create Service and attach to ELB

aws ecs create-service --service-name "UniRoma2-MicroserviceOne" --cluster UniRoma2-ECSCluster-1JYA72NORCX8 --task-definition "ecscompose-python-microservice-one" --load-balancers "targetGroupArn=arn:aws:elasticloadbalancing:eu-west-1:831650818513:targetgroup/Microservices-one/cca50273455ba775,containerName=web,containerPort=8080" --desired-count 2 --deployment-configuration "maximumPercent=200,minimumHealthyPercent=50" --role ECS-TestRole

aws ecs create-service --service-name "UniRoma2-MicroserviceTwo" --cluster UniRoma2-ECSCluster-1JYA72NORCX8 --task-definition "ecscompose-python-microservice-two" --load-balancers "targetGroupArn=arn:aws:elasticloadbalancing:eu-west-1:831650818513:targetgroup/Microservices-two/b08b98b4bce484ec,containerName=web,containerPort=8080" --desired-count 2 --deployment-configuration "maximumPercent=200,minimumHealthyPercent=50" --role ECS-TestRole

Update Service and attach to ELB

aws ecs update-service --service UniRoma2-MicroserviceOne --cluster UniRoma2-ECSCluster-1JYA72NORCX8 --task-definition "ecscompose-python-microservice-two" --desired-count 2 --deployment-configuration "maximumPercent=200,minimumHealthyPercent=100"

aws ecs create-service --service-name "UniRoma2-MicroserviceOne" --cluster UniRoma2-ECSCluster-1JYA72NORCX8 --task-definition "ecscompose-python-microservice-one" --load-balancers "targetGroupArn=arn:aws:elasticloadbalancing:eu-west-1:831650818513:targetgroup/Microservices-one/cca50273455ba775,containerName=web,containerPort=8080" --desired-count 2 --deployment-configuration "maximumPercent=200,minimumHealthyPercent=50" --role ECS-TestRole

aws ecs create-service --service-name "UniRoma2-MicroserviceTwo" --cluster UniRoma2-ECSCluster-1JYA72NORCX8 --task-definition "ecscompose-python-microservice-two" --load-balancers "targetGroupArn=arn:aws:elasticloadbalancing:eu-west-1:831650818513:targetgroup/Microservices-two/b08b98b4bce484ec,containerName=web,containerPort=8080" --desired-count 2 --deployment-configuration "maximumPercent=200,minimumHealthyPercent=50" --role ECS-TestRole

Scale task associated to services

aws ecs list-services --cluster UniRoma2-ECSCluster-1JYA72NORCX8
aws ecs update-service --service UniRoma2-MicroserviceOne --cluster UniRoma2-ECSCluster-1JYA72NORCX8 --desired-count 2
aws ecs update-service --service UniRoma2-MicroserviceTwo --cluster UniRoma2-ECSCluster-1JYA72NORCX8 --desired-count 2

Scale cluster

aws autoscaling set-desired-capacity --auto-scaling-group-name UniRoma2-ECSAutoScalingGroup-K76B7PJC
483 --desired-capacity 6 --honor-cooldown

BLUE/GREEN Deployment

aws cloudformation create-stack --stack-name UniRoma2-ALB-Green --template-body file://./infrastructure-alb/alb.json --parameters file://./infrastructure-alb/parameters.json

Pattern One: DNS Swap

  • Create new task definition
  • Create new service
  • Create new ElasticLoadBalancing
  • Attach new service to new LoadBalancer
  • Update Route53 to new service
  • CleanUP Blue Environment

Pattern Two: Service Swap

  • Create new task definition
  • Create new service
  • Attach new service to existing LoadBalancer
  • ScaleUP Green Service
  • SCaleDOWN Blue Service

Pattern Three: Service Update

  • Create new task definition
  • Update the service