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Shell script to start/stop an EC2 instance to use as a ssh tunnel
#!/bin/bash
# Start/stop an EC2 instance to use as a ssh tunnel
# requires the aws package locally -- sudo apt-get install awscli
#
# usage: ./tunnel.sh start (spin up EC2 and create the tunnel)
# ./tunnel.sh stop (terminate the EC2 instance to save money)
# ./tunnel.sh resume (in case your tunnel is interrupted but the EC2 instance is still running)
# CHANGE THE PARAMETERS BELOW
imageid="ami-37501207" # this is an Ubuntu AMI, but you can change it to whatever you want
instance_type="t1.micro"
key_name="myawskeypairname" # your keypair name -- http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-key-pairs.html
security_group="my-security-group" # your security group -- http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-network-security.html
wait_seconds="5" # seconds between polls for the public IP to populate (keeps it from hammering their API)
port="5222" # the SSH tunnel port you want
key_location="/home/aws/keypair.pem" # your private key -- http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-key-pairs.html#having-ec2-create-your-key-pair
user="ubuntu" # the EC2 linux user name
# END SETTINGS
# --------------------- you shouldn't have to change much below this ---------------------
# private
connect ()
{
ssh -oStrictHostKeyChecking=no -ND $port -i $key_location $user@$ip
}
# private
getip ()
{
ip=$(aws ec2 describe-instances | grep PublicIpAddress | grep -E -o "([0-9]{1,3}[\.]){3}[0-9]{1,3}")
}
# public
start ()
{
echo "Starting instance..."
aws ec2 run-instances --image-id $imageid --count 1 --instance-type $instance_type --key-name $key_name --security-groups $security_group > /dev/null 2>&1
# wait for a public ip
while true; do
echo "Waiting $wait_seconds seconds for IP..."
sleep $wait_seconds
getip
if [ ! -z "$ip" ]; then
break
else
echo "Not found yet. Waiting for $wait_seconds more seconds."
sleep $wait_seconds
fi
done
echo "Found IP $ip - Starting tunnel on port $port"
connect
}
# public
stop ()
{
instance=$(aws ec2 describe-instances | grep InstanceId | grep -E -o "i\-[0-9A-Za-z]+")
aws ec2 terminate-instances --instance-ids $instance
}
# public
resume ()
{
getip
connect
}
# public
instruct ()
{
echo "Please provide an argument: start, stop, resume"
}
#-------------------------------------------------------
# "main"
case "$1" in
start)
start
;;
resume)
resume
;;
stop)
stop
;;
help|*)
instruct
;;
esac
@r-chris

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@r-chris r-chris commented Apr 12, 2016

You may want to add the region as a configurable.

@kpbird

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@kpbird kpbird commented Oct 26, 2017

how to execute the command after connect ssh?

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