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Accepted
Skaperen
Asked: 2015-08-28 04:20:12 +0800 CST

how to disable executing user-data by cloud-init

  • 772

I am making a new AMI in EC2 and want to disable it running anything that could be put in user-data when launching (or rebooting) from this AMI. I looked at the existing /etc/cloud/cloud.cfg and /etc/cloud/cloud.cfg.d/* but do not see where this is enabled (so maybe it is on by default). How can I reconfigure cloud-init to not allow this or even allow this to be re-enbled? I suspect I also need to disable #cloud-config. Do I need to disable the whole cloud-init package to achieve this?

edit:

I will be using Amazon Linux and Ubuntu in various AMIs.

edit2:

It looks like I need to disable all of user-data. Maybe that will be easier.

edit3:

I do want to be able to access the user-data in my scripts.

amazon-ec2

2 Answers

  1. Best Answer

    This is my current hack — not too elegant, but it works:

    patch /usr/lib/python2.7/dist-packages/cloudinit/stages.py <<EOF
@@ -469,7 +469,6 @@
     def consume_data(self, frequency=PER_INSTANCE):
         # Consume the userdata first, because we need want to let the part
         # handlers run first (for merging stuff)
-        self._consume_userdata(frequency)
         self._consume_vendordata(frequency)

         # Perform post-consumption adjustments so that
EOF
    • 1

  2. A more elegant way to do this is create a file named cloud-config.txt in /var/lib/cloud/instances/{your-instance-id} , with the following content:

    #cloud-config   
# from 1 files
# cloud-config.txt

--- cloud_final_modules:
-   - scripts-user
    - never 
...
    • 0