Test User Data

#!/bin/sh

###
### Payload script
### 

CURRENT_USER=$(whoami)
echo "Hello from shell script as user: \"$CURRENT_USER\""

exit 0

####
#### User Data Script 
####
#!/bin/sh 

REMOTE_SCRIPT_URL=https://gist.githubusercontent.com/sebsto/6b2f976d7bd6e84dd2eb147c0a7af9f8/raw/71cb67d980e2b03aac9b99f203f42010cb62fa0d/Test%2520User%2520Data
LOCAL_FILENAME=/tmp/shell_script.sh
NON_PRIVILEDGED_USER=ec2-user


curl -s -o $LOCAL_FILENAME "$REMOTE_SCRIPT_URL"
chmod u+x $LOCAL_FILENAME
chown $NON_PRIVILEDGED_USER:staff $LOCAL_FILENAME
su -m $NON_PRIVILEDGED_USER $LOCAL_FILENAME > /tmp/userdata.txt # beware of env variables accessible or not from the target script (read `man su` for a detailed discussion)
rm $LOCAL_FILENAME


###
### EC2 run instance command (assumes userdata.sh is the script above, in the current directory)
### 
HOST_ID=h-00000d
SSH_KEY_NAME=my_ssh_key
AMI_ID=ami-04a8015f31efaeab1 # macOS 13.2 on Apple Silicon in us-east-1
SECURITY_GROUP=sg_700000001
aws ec2 run-instances                          \
        --region us-east-1                     \
        --instance-type mac2.metal             \
        --placement HostId=$HOST_ID            \
        --key-name $SSH_KEY_NAME               \
        --image-id $AMI_ID                     \
        --security-group-ids $SECURITY_GROUP   \
        --user-data file://./userdata.sh