ERROR: The overall deployment failed because too many individual instances failed deployment

Question

I'm trying to deploy using CircleCI -> S3 -> CodeDeploy -> EC2. I was able to upload deploy image onto S3 from CircleCI, but unable to deploy S3 to EC2 instance. Here's the error.

The overall deployment failed because too many individual instances failed deployment, too few healthy instances are available for deployment, or some instances in your deployment group are experiencing problems. (Error code: HEALTH_CONSTRAINTS)

The error was provided from CodeDeploy. I can't figure out why and how. I'd appreciate if you give some advise.

Answer 1

If you are running on Ubuntu there might be plenty of reasons, here is a checklist can verify

Check code-deploy agent is installed on your EC2 Instance. Please refer this document to install code deploy agent. https://docs.aws.amazon.com/codedeploy/latest/userguide/codedeploy-agent-operations-install-ubuntu.html

$ sudo service codedeploy-agent status

In case if you are running Ubuntu release 20.x and you get this error

./install:22:in block in method_missing': undefined method path' for #<IO:> (NoMethodError)

try running the install file via this script

sudo ./install auto > /tmp/logfile

1. Check you have EC2 Instance Code Deploy Role -> Create a code deployment role and assign it to the Instance, https://docs.aws.amazon.com/codedeploy/latest/userguide/getting-started-create-service-role.html.

In case if you assign the EC2 Role after initiate, restart the server.

2. Check your appsec.yml file placement as per the top answer, try to avoid any long timeout in it.

3. Log into your instance check your error log

$ tail -f /var/log/aws/codedeploy-agent/codedeploy-agent.log