setup-custom-elb-healthchecks.md

Provisioning Autoscaling group with sereral EC2 instances, ELB and custom ELB healthchecks

In this lab you will provision an AWS autoscaling group which will create an ELB and 2 EC2 instances with EC2 instances healthchecks

Provision an autoscaling group

ansible-playbook provision-elb-custom-healthcheks-asg-playbook.yml

Verify the instance states in the group

aws autoscaling describe-auto-scaling-groups --auto-scaling-group-names workshop-ec2-healthchecks-asg --query 'AutoScalingGroups[0].Instances'

Verify the states of the instances towards ELB

aws elb describe-instance-health --load-balancer-name workshop-ec2-healthchecks-lb 

Get instance ips

aws ec2 describe-instances --instance-ids <instance_id> --query 'Reservations[0].Instances[0].PrivateIpAddress'

Ssh to any of the nodes

ssh <user>aw@<instance_ip_address> -i <path_to_key>

Stop app container

docker stop rest

Verify the instance states in the group

aws autoscaling describe-auto-scaling-groups --auto-scaling-group-names workshop-ec2-healthchecks-asg --query 'AutoScalingGroups[0].Instances'

Verify the states of the instances towards ELB

aws elb describe-instance-health --load-balancer-name workshop-ec2-healthchecks-lb

Verify that app is working

curl http://<ip_addr>:8080/ping