EC2 Maintainer

This is a simple script that will stop and start EC2 instances if it fails to GET a particular URL. This is useful for maintaining EC2 instances that are not behind a load balancer.

Flowchart

+-------------------+
|       Start       |
+-------------------+
        |
        v
+-------------------+
|   Initialize      |
|    variables      |
+-------------------+
        |
        v
+-------------------+
|  Enter while      |
|    loop           |
+-------------------+        
        |                    
        |                    
        |<-------------------+<-----+
        |                    |      |
        v                    |      |      
+------------------==-+      |      |
|  URL reachable      |>-----+  YES |      
|  for T amount       |             |
+---------------------+             |
|   Continue loop     |             |
|       |             |             |
+-------|-------------+             |
        |       v  ^                |
        |       |no|                |
        | No    +--+                |
        v                           |
+------------------------+          |
|Restart the EC2 server  |          |
| (handle                |          |
|  unreachable URL)      |          |
+------------------------+          |
        + --------->----------------+

Configuration

Since whole point is to maintain EC2 instnace. this is made to be hosted on a different machine. that have no connection to the EC2 instance you are monitoring.

{
    "i-03cdcee6a9ea8be78": {
        "location": {
            "url": "https://streamsnip.com",
            "headers": {},
            "response_code" : 200,
            "timeout" : 10
        },
        "ec2":{
            "region": "us-east-2",
            "aws_access_key_id": "ASF125GASSEQ23",
            "aws_secret_access_key": "asdasdsadasdcqwwe12rsdgs"
        },
        "interval": 60,
        "tolerance" : 10,
        "discord": "https://discord.com/api/webhooks/1205223388512124990/ub640V3iN-"
    }
}

Example configuration. You can get aws acccess key id and access key from here

Installation

pip install -r requirements.txt

Usage

python main.py

Crontab

@reboot cd /root/ec2_maintainer && nohup python3 main.py &

SurajBhari / ec2_maintainer