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)

2017-12-13 10:15:34 ERROR [codedeploy-agent(25805)]: InstanceAgent::Plugins::CodeDeployPlugin::CommandPoller: Cannot reach InstanceService: Aws::CodeDeployCommand::Errors::UnrecognizedClientException - The security token included in the request is invalid. 2017-12-13 10:15:42 INFO  [codedeploy-agent(25805)]: Version file found in /opt/codedeploy-agent/.version with agent version OFFICIAL_1.0-1.1352_rpm. 2017-12-13 10:15:44 INFO  [codedeploy-agent(25805)]: [Aws::CodeDeployCommand::Client 400 2.152917 3 retries] poll_host_command(host_identifier:"arn:aws:ec2:eu-west-2:971219192778:instance/xxx") Aws::CodeDeployCommand::Errors::UnrecognizedClientException The security token included in the request is invalid.