Final day Lambda-Prj

Class 65th AWS Project day 4 July 11th

Final day for AWS Complete Project 

Step1: This Git code upload all lambda function and main app.py file

https://github.com/Vakatisubbu/Lambda_prj.git

Step2: Create launch template ,base on the autoscaling and target group creation steps

Name: Launch-template

Step3: Select Quick start 

AMI:Amazon Linux (Free tier eligible)

Instance Type: t2.micro(Free tier eligible), Network setting Don't include in launch template

we will do at time of autoscaling 

Step4: click Advance detail , add below code user data

#!/bin/bash
# Update system and install dependencies
yum update -y
yum install -y python3 python3-pip git

# Configure Python environment
python3 -m pip install --upgrade pip
python3 -m pip install --user flask requests boto3

# Clone the project
cd /home/ec2-user
git clone https://github.com/Vakatisubbu/Lambda_prj.git

# Set proper permissions (added your requested lines)
sudo chown -R ec2-user:ec2-user /home/ec2-user/Lambda_prj/
sudo chmod 755 /home/ec2-user/Lambda_prj/
cd Lambda_prj

# Create systemd service file
cat << 'EOF' > /etc/systemd/system/digital_library.service
[Unit]
Description=DigitalLibrary Flask App
After=network.target

[Service]
User=ec2-user
Group=ec2-user
WorkingDirectory=/home/ec2-user/Lambda_prj
ExecStart=/usr/bin/python3 app.py
Restart=on-failure
RestartSec=5s
Environment="PATH=/usr/local/bin:/usr/bin:/bin"

# Security hardening
NoNewPrivileges=true
PrivateTmp=true
ProtectSystem=full

[Install]
WantedBy=multi-user.target
EOF

# Enable and start the service
systemctl daemon-reload
systemctl enable digital_library
systemctl start digital_library

Step5: Then click create launch template,created launch template

Step6:select the template and actions>create autoscaling group

Step7:Click next 

Step8:Attached new load balancer 

Step9:Public subnets new name give to target group Target-group

Step10:No changes,click Next 

Step12:Desire give 2, no change Click next ,

Add notification -optional Click next

Add tags -option Click next 

Review >Create Autoscaling Group

Step13: Two instance created successfully

Note: Subnet Public ip must automatic enabled

Step14:Create new service Demon service 

First Sever 

[ec2-user@ip-10-0-2-60 systemd]$ cd /etc/systemd

[ec2-user@ip-10-0-2-60 systemd]$ sudo  vi digital_library.service

[Unit]
Description=DigitalLibrary Flask App
After=network.target

[Service]
User=ec2-user
Group=ec2-user
WorkingDirectory=/home/ec2-user/Lambda_prj
ExecStart=/usr/bin/python3 app.py
Restart=on-failure
RestartSec=5s
Environment="PATH=/usr/local/bin:/usr/bin:/bin"

# Security hardening
NoNewPrivileges=true
PrivateTmp=true
ProtectSystem=full

[Install]
WantedBy=multi-user.target

[ec2-user@ip-10-0-2-60 ~]$ cd /home/ec2-user/Lambda_prj/

[ec2-user@ip-10-0-2-60 ~]$ pip3 install flask

[ec2-user@ip-10-0-2-60 ~]$ pip3 install requests

[ec2-user@ip-10-0-2-60 ~]$ pip3 install boto3

[ec2-user@ip-10-0-2-60 ~]$ cd /home/ec2-user/Lambda_prj/

[ec2-user@ip-10-0-2-60  Lambda_prj ~]$  sudo systemctl daemon-reload

[ec2-user@ip-10-0-2-60  Lambda_prj~]$ sudo systemctl daemon-reexec

[ec2-user@ip-10-0-2-60 Lambda_prj ~]$ sudo systemctl restart digital_library

[ec2-user@ip-10-0-2-60  Lambda_prj~]$ sudo systemctl status digital_library

● digital_library.service - DigitalLibrary Flask App

     Loaded: loaded (/etc/systemd/system/digital_library.service; enabled; preset: disabled)

     Active: active (running) since Thu 2025-07-24 19:07:17 UTC; 5s ago

Second  server:

[ec2-user@ip-10-0-2-13 ~]$ cd /etc/systemd

[Unit]
Description=DigitalLibrary Flask App
After=network.target

[Service]
User=ec2-user
Group=ec2-user
WorkingDirectory=/home/ec2-user/Lambda_prj
ExecStart=/usr/bin/python3 app.py
Restart=on-failure
RestartSec=5s
Environment="PATH=/usr/local/bin:/usr/bin:/bin"

# Security hardening
NoNewPrivileges=true
PrivateTmp=true
ProtectSystem=full

[Install]
WantedBy=multi-user.target

[ec2-user@ip-10-0-2-13 ~]$ cd /home/ec2-user/Lambda_prj/

[ec2-user@ip-10-0-2-13 Lambda_prj]$  sudo systemctl daemon-reload

[ec2-user@ip-10-0-2-13 Lambda_prj]$ sudo systemctl daemon-reexec

[ec2-user@ip-10-0-2-13 Lambda_prj]$ sudo systemctl restart digital_library

[ec2-user@ip-10-0-2-13 Lambda_prj]$ sudo systemctl status digital_library

● digital_library.service - DigitalLibrary Flask App

     Loaded: loaded (/etc/systemd/system/digital_library.service; enabled; preset: disabled)

     Active: active (running) since Thu 2025-07-24 19:07:17 UTC; 5s ago

Step15:Check with public ip's Application working or not,Port in the app.py mentioned 5000

 

First instance Public ip :13.41.229.236

Second instance Public ip 

Step16: If you are facing any issues Try these steps  

[ec2-user@ip-10-0-2-13 Lambda_prj]$ sudo chown -R ec2-user:ec2-user /home/ec2-user/Lambda_prj

[ec2-user@ip-10-0-2-13 Lambda_prj]$ sudo chmod 755 /home/ec2-user/Lambda_prj

[ec2-user@ip-10-0-2-13 Lambda_prj]$ sudo systemctl daemon-reload

[ec2-user@ip-10-0-2-13 Lambda_prj]$ sudo systemctl start digital_library

[ec2-user@ip-10-0-2-13 Lambda_prj]$ sudo systemctl enable digital_library

[ec2-user@ip-10-0-2-13 Lambda_prj]$ sudo systemctl restart digital_library

[ec2-user@ip-10-0-2-13 Lambda_prj]$ sudo systemctl status digital_library

Step17: target group /health 5000 override port 

Loader balancer and lister 5000 port

Load balancer add the lister 443

Step18:Route 53 you need add the A record,if any existin A record delete , create new for loadbalancer 

using dns 

Step19:existing load balancer Click a record

Step20:

Step21: it will take some time vakatisubbu.xyz 10 to 15 minute synchrize

Step22: Mean while database i have already created, it was shutdown just restart the database 

it is starting 

Step23: Lambda functions already , i have created  Below are reference ,

Already ,i have share Git Repo first line of this page ,you take create lambda function accordingly 

Step24:Correspondindg Rest API also need create,All are usign Get function

Step25:

All test API's intergration request mapping parameters below 

1)

/BarrowBooks

Content type : application/json

{

  "user_id": "$input.params('user_id')",

  "book_id": "$input.params('book_id')"

}

2)

/GetBarrowBooks

Content type : application/json

{

  "user_id": "$input.params('user_id')"

}

3)

/GetBarrowHistory

Content type : application/json

{

  "user_id": "$input.params('user_id')"

}

4) No input parameter  all list of book will populate

/ListBooks

Nothing 

5)

/ReturnBooks

Content type : application/json

{

  "user_id": "$input.params('user_id')",

  "book_id": "$input.params('book_id')"

}

6)

/Signin

Content type : application/json

{

  "user_id": "$input.params('user_id')",

  "book_id": "$input.params('book_id')"

}

7)

/Signup

Content type : application/json

{

   "name": "$input.params('name')",

   "mobile": "$input.params('mobile')",

   "email": "$input.params('email')",

   "password":"$input.params('password')",

   "gender": "$input.params('gender')",

   "location":"$input.params('location')",

   "image": "$input.params('image')"

}

8)

/Welcome

Content type : application/json

{

  "user_id": "$input.params('user_id')"

}

Step26:

After database restarted and domain 15minute taking to synchrize, See below webpage login successfully,So Digital Library project completed successfully...

--Thanks