I'm using AWS elastic beanstalk web interface to create an environment based on an existing AMI that has our application deployed on it.
The environment gets created, the app is accessible via the ec2 instance's IP. however the environment's health keeps as "Pending" for 15 minutes then degrades to Severe after that with these errors in the environment's log:
2017-10-22 15:57:50 UTC+0300 INFO Launched environment: Winfooztest->env-6. However, there were issues during launch. See event log for >details.
2017-10-22 15:57:49 UTC+0300 ERROR The EC2 instances failed to >communicate with AWS Elastic Beanstalk, either because of configuration >problems with the VPC or a failed EC2 instance. Check your VPC >configuration and try launching the environment again. 2017-10-22 15:57:49 UTC+0300 ERROR Stack named 'awseb-e-ypy7mg2pta->stack' aborted operation. Current state: 'CREATE_FAILED' Reason: The >following resource(s) failed to create[AWSEBInstanceLaunchWaitCondition].
2017-10-22 15:56:16 UTC+0300 WARN Environment health has >transitioned from Pending to Severe. Initialization in progress (running >for 16 minutes). None of the instances are sending data.
2017-10-22 15:41:48 UTC+0300 INFO Created CloudWatch alarm named: >awseb-e-ypy7mg2pta-stack-AWSEBCloudwatchAlarmHigh-QVXFWC3HZS5S
So what I understood here is that the instance is created, but it's failing to communicate with elastic beanstalk. In contrast to common security sense, and in order to pinpoint the problem, I've tried to keep my VPC setting as public as possible. Here is what I did:
VPC type: Created a "VPC with a single public subnet"
IPv4 CIDR block: 10.0.0.0/16
Public subnet's IPv4 CIDR: 10.0.0.0/24
Checked the option to have a public IP address for the VPC
Security group - Inbound: ALL Traffic|ALL|ALL|0.0.0.0/0
Security group - Outbound: ALL Traffic|ALL|ALL|0.0.0.0/0
Environment is configured to use a load balancer.
I know there is a small networking tweak that I need to do. I've scratched my head (and my search engine) a lot. What am I missing? Can you help?