Details

Deploy any number of EC2 Sample flask web servers with mysql and Extra EC2 instance which monitor all web servers.

AWS credintials

• You can store them in .boto file
• Or export to the environment variable using export AWS_ACCESS_KEY=XXXXXXX and export AWS_SECRET_KEY=XXXXXXX as of now this step is implemented in code
• Or you can directly declare them as variables, in group_vars or in playbook vars.

So modify ec2_create role according to your usage

• ssh setup is required. for making changes in EC2 instances.

• ssh-keygen for creating new ssh keys. Accept the default values, and no passphrase, if it prompts you to add the new keys to the home directory, without overwriting existing ones.

• Now in AWS EC2 keypairs section create a new keypair using import key pair option which is present in Actions and copy paste the content in cat .ssh/id_rsa.pub.

• Change key-pair name accordingly in roles/vars/ec2_create the default key pair name i have used is jenkins_ubuntu.

• or else if you are familiar with AWS-CLI you can use aws ec2 import-key-pair --key-name "your'e key name" --public-key-material fileb://~/.ssh/id_rsa.pub

Required

• You need to provide the git hub repo link where you flask application has present.
• make sure that there is a .sql file for Tables creation.
• The name of python file should be app.py
• make Modification's to nagios also , you are free to add notification alerts.

Nagios

• The default nagios credintials are:

  • user_name: nagiosadmin and password is password itslef.

• you cann add any name and password, and you can change monitoring thresholds.

• The code works for all linux Distributions of your'e choice in AWS AMI like Ubuntu,CentOS, RedHat etc..,

steps to run

• clone the repo: git clone https://github.com/saireddyavs/Ansible-mysql-flask-EC2-nagios.git.
• make changes to default variables like key-pair etc..
• The code works for all linux Distributions of your'e choice in AWS AMI like Ubuntu,CentOS, RedHat etc..,
• For running the code in AWS EC2 instances: ansible-playbook run_setup.yml.
• you can see your web-application using, copy pasting public_ip of your any of your web-servers as the URL in browser.
• for Nagios , copy pasting public_ip/nagios as the URL in browser,here public_ip refers to ip of nagios-server. You can login with username:nagiosadmin and password:password to monitor all your web-servers.

For Jenkins

• make sure you have ssh setup fot jenkins, if not follow below procedure.
• su -s /bin/bash jenkins then recheck the user using whoami and echo $HOME
• ssh-keygen for creating new ssh keys. Accept the default values, and no passphrase, if it prompts you to add the new keys to the home directory, without overwriting existing ones.
• Now in AWS EC2 keypairs section create a new keypair using import key pair option which is present in Actions and copy paste the content in cat .ssh/id_rsa.pub.
• Change key-pair name accordingly in roles/vars/ec2_create the default key pair name i have used is jenkins_ubuntu.

Your'e free to change the code and any contributions and suggestions are welcomed.

References

• sample flask application is from here where i have modified and fixed some errors, the updatd version is here.
• for monitoring i used help from Sam-Darwins repo.