AWS instance manager

Name: Daemon Macklin

Student Number: 20075689

Project best viewed on github

What is it?

This program allows users to start aws instances do some basic management

Creating an instance

There are three things required to create an AWS instance:

• A security Group ID which allows ssh and http trafic from anywhere.
• A keypair that was made with your AWS account.
• A name that will be used for the instance tags.

The user will be prompted to provide all of these in the program. Once all of the required data is collect an instance will be created and the User will have to wait 60 seconds before they can continue.

The instance will be created and a userdata script will be run which will update, install nginx and state an nginx webserver on the instance.

Checking nginx

Provided with the run_webserver.py script is a check_webserver.py script. using secure copy(scp) the check_webserver.py script is copied to the instance of the users choice, after it is copied up the script has it's permissions changed so that it can be run and then it is run. The script will check if the nginx server is running, using ps and grep and if it is will inform the user and if it is not running it will try and start the nginx server.

Starting s3 bucket

There is only one thing required to start an s3 bucket.

• A name for the bucket

The user will be prompted to provide this information and once given a bucket will be created and a list of the users buckets will be printed out

Uploading an image to server

There are two steps in this process

1. Uploading the selected image to the selected bucket
2. Congifuring the nginx server on a selected instance to display the image

In the first step the user is prompted with a list of all their buckets Then the user is asked to provide the name of the bucket they want to use. Once the user selects the bucket name the user is prompted for the name of the image file they want to upload. With the bucket name and the file name it is possible to upload the image to the bucket

In the second step the user is prompted with a list of all their instances and asked to input the id of the instance they want to use to host the image. Once selected the user must provided the key they used to create the instance. The html is generated with the bucket name and file name that was input earlier to generate the link to the image. Then this html is echoed into an index.html file. This index.html file is then secure copied up to the instance in the location of the nginx default index.html file.

Terminate Instance

When this option is selected the user is prompeted with a list of their instances. The user is asked to provide the id of the intstance they want to terminate and if the id is correct the instance is terminated.

List Instance

When this option is selected the programme goes through each instance and prints some basic information about the instance and if the instance is running the user will be asked if they want system information. If the user inputs 1 some ssh commands will be run which will return cpu usage, a list of the running processes and virtual memory stats.

Terminate Bucket

When this option is selected the user is prompeted with a list of their buckets. The user is asked to provide the name of the bucket they want to terminate and if the name is correct the bucket is terminated if the bucket is empty.

Empty Bucket

When this option is selected the user is prompeted with a list of their buckets. The user is asked to provide the name of the bucket they want to empty and if the name is correct the bucket is emptied.

List buckets

When this option is selected a list of buckets is outputted to the user

References

Line 336 Got code to find CPU usage here