employee directotory exercise3 - Launching an EC2 Instance

Question

hello Im trying to process excersice 3 for creation of EC2 instance as part of online training. all isntructions are described here : 
https://aws-tc-largeobjects.s3-us-west-2.amazonaws.com/DEV-AWS-MO-GCNv2/exercise-3-compute.html

Im able to succesfully create EC2 instnace but page which shoudl be available is till unreacable
Im able to connect to linux  server where below code should be executed as part of instance createion (according to isntructions) 
#!/bin/bash -ex
wget https://aws-tc-largeobjects.s3-us-west-2.amazonaws.com/DEV-AWS-MO-GCNv2/FlaskApp.zip
unzip FlaskApp.zip
cd FlaskApp/
yum -y install python3 mysql
pip3 install -r requirements.txt
amazon-linux-extras install epel
yum -y install stress
export PHOTOS_BUCKET=${SUB_PHOTOS_BUCKET}
export AWS_DEFAULT_REGION=
export DYNAMO_MODE=on
FLASK_APP=application.py /usr/local/bin/flask run --host=0.0.0.0 --port=80

however nothing fromt this is executed on the server. 
When I try to execute this manualy one by one I have to additionaly use sudo command and install individualy pip3 and still amazon-linux-extras is not executable. 
At the and page is still not reachable. 
I think that the provided instructution for this excercise are realy outdated.
So can anybody help me to successfully complete this excercise so page be reachable? What is the peroper set of commands whcih have to be executed? 
And why non of them is executed duritng boot as they are part of user data box durign instance creation ?

Thank you anybody for the answer.

Regards

Answer

Hi,
After spent a couple of hours I was able to run it. 
Steps
1. Add SSH in the security group as inbound.
2. Connect your EC2 instance and install python3 + pip3.
3. Install Flask
4. Due to Flask security reason you cannot run in Port 80 because it was considered as production App. The current project can be easily run on Port 8080.
5. If you want to run on Port 80 then you should use some CGI server as there are plenty of options.
6. Before running App on Port 8080 you must add security group inbound rule "Custom TCP" in Port Range : 8080 
I hope it will help you

Thanks in advance

Answer

Hey, I'm also doing the program on coursera and encountering the same problem. Have reported it as an issue on the course, so hopefully they fix that soon. In the meantime, choosing a different AMI (Amazon Linux 2) makes the instance work as intended, without manually needing to ssh and install stuff. Reference: https://repost.aws/questions/QUXuZePk-bR5ePXWyxqjFLaA/coursera-aws-cloud-technical-essentials-help-exercise-3-launching-an-ec-2-instance

As for the needing to use sudo - "Scripts entered as user data are run as the root user", which is why sudo is not included in the user data script but you need to include it as ec2-user when you ssh. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/user-data.html#user-data-shell-scripts

employee directotory exercise3 - Launching an EC2 Instance

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