Crontab in AWS CloudFormation Userdata

Question

How to set crontab when using AWS CloudFormation Userdata?

I am setting

(crontab -l ; echo \"0 * * * * wget -O - -q http://www.example.com/cron.php\") |          


        

Answer 1

This will work, set this in your template, for your instance:

"UserData": {
    "Fn::Base64": {
        "Fn::Join": [
            "",
            [
                "#!/bin/bash\n",
                "echo '0 * * * * wget -O - -q http://www.example.com/cron.php' > /tmp/mycrontab.txt\n",
                "sudo -u ubuntu bash -c 'crontab /tmp/mycrontab.txt'\n",
            ]
        ]
    }
}