[SOLVED] Save file into EC2 directly through Lambda

Issue

I've made a Lambda function that stores a binary file into S3 and it works fine. Instead, now I would like to save this file directly into my EC2 instance storage volume . I searched a lot but I didn't understand if it's possible yet. Do you know? I've already made an SSH connection (inside the Lambda..) to run SSH commands but I don't how to use in my case and if is the right way to save my data ...Do you have some idea?

I know that there is possibility to connect S3 to EC2 but first I would like to understand the possibility above.. Thanks

Solution

I made a solution ( Python ): Using Boto3 and Paramiko package I build an SSH client to EC2, so I move my file to S3 by AWSCLI. If useful for anyone I post part of code below:

import json
import boto3  
import paramiko  

def lambda_handler(event, context):
    #My Parameters
    myBucket = "lorem"
    myPemKeyFile="lorem.pem"
    myEc2Username="lorem"
 
    ec2_client = boto3.client('ec2')
    s3_client = boto3.client("s3")
    OutFileName= "lorem.txt"

# PREPARING FOR SSH CLIENT
    try:
        # GETTING ISTANCE INFORMATION
        describeInstance = ec2_client.describe_instances()
        hostPublicIP=[]
        # fetchin public IP address of the running instances
        for i in describeInstance['Reservations']:
            for instance in i['Instances']:
                if instance["State"]["Name"] == "running":
                    hostPublicIP.append(instance['PublicIpAddress'])
        #print(hostPublicIP)
    
        # DOWNLOADING PEM FILE FROM S3
        s3_client.download_file(myBucket,myPemKeyFile, '/tmp/file.pem')
        # reading pem file and creating key object
        key = paramiko.RSAKey.from_private_key_file("/tmp/file.pem")
    
        # CREATING Paramiko.SSHClient
        ssh_client = paramiko.SSHClient()
        # setting policy to connect to unknown host
        ssh_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        host=hostPublicIP[0]
        #print("Connecting to : " + host)
        # connecting to server
        ssh_client.connect(hostname=host, username=myEc2Username, pkey=key)
        #print("Connected to :" + host)
    except:
        raise Exception('OPS, there whas a crash preparing for SSH client!!  500 ')    
    
# MOVING FILE INTO S3 
           
        commands = [ 
            "aws s3 mv ~/directoryFrom/"+OutFileName+" s3://"+myBucket+"/"+OutFileName
        ]
        
        try:
            for command in commands:
                stdin , stdout, stderr = ssh_client.exec_command(command)
                SSHout=stdout.read()
        except:
             raise Exception('OPS, somethig happends to SSH client. Move  file to S3 didn\'t run  500')

Answered By - cco