Ecs::Easy::Cluster
ecs-easy-cluster is a easy clustering tool for AWS ECS. This tool focuses on executing tiny scripts, jobs or batches without considering the running environment.
Installation
Add this line to your application's Gemfile:
gem 'ecs-easy-cluster'
And then execute:
$ bundle
Or install it yourself as:
$ gem install ecs-easy-cluster
Usage
require "ecs/easy/cluster"
#
# Set basic info: credentials and region
#
configure = Ecs::Easy::Configure.new do |c|
c.profile = "your-aws-profile"
c.region = "your-aws-region"
end
#
# Define ec2 instance profile
#
instance = Ecs::Easy::Instance.new do |i|
i.type = "t2.nano"
i.keypair = "your-keypair"
i.azs = "ap-northeast-1a,ap-northeast-1c"
i.subnets = "subnet-00000000,subnet-11111111"
i.vpc = "vpc-00000000"
i.image_id = "ami-00000000"
i.security_group = "sg-00000000"
# Currently user_data allows only /bin/bash
i.user_data = [
"echo 'xxxxxxxx' >> /home/ec2-user/.ssh/authorized_keys\n",
]
end
#
# Define the scale setting of your cluster
#
cluster = Ecs::Easy::Cluster::MemScale.new("cluster-name", configure) do |c|
c.max_instances = 2
c.min_instances = 1
c.instance = instance
end
#
# Make your task running
#
res = cluster.make_task_running!("your-task-definition-name")
#
# You can call aws-sdk Aws::ECS::Client method with: cluster.ecs_client
# http://docs.aws.amazon.com/sdkforruby/api/Aws/ECS/Client.html
#
task_arns = res["tasks"].map{|t| t["task_arn"]}
cluster.ecs_client.wait_until(:tasks_stopped, cluster: "cluster-name", tasks: task_arns) do |w|
w.max_attempts = 100
w.delay = 6
end
#
# Shrink your scaled instances
# ------------
# !! CAUTION !!
# This command terminates redundant instances even if some tasks are running on them.
#
cluster.shrink!Memo
ecs/easy/cluster/cloudformation_template.json.erb is refered from the link below.