Cloud-Init: A Powerful Configuration Tool with room for improvement
Cloud-init is a powerful configuration tool used in several Linux distributions, but its implementation can sometimes be a source of frustration. In this blog post, we will explore two different approaches to disable cloud-init and the reasons why you might want to do so.
Flexible Mode: Disable cloud-init from file
This is the safest and easiest method to disable cloud-init, and it’s fast to reverse. To disable cloud-init, create a `cloud-init.disabled` file in the `/etc/cloud` directory and reboot the system. The `touch` command can be used to create the file:
“`
sudo touch /etc/cloud/cloud-init.disabled
“`
This approach does not modify any package or configuration files, so it’s easy to reverse by simply removing the `cloud-init.disabled` file.
Permanent Mode: Remove cloud-init package
This second method does not only disable cloud-init but completely removes its package and files from the Ubuntu Server machine. To remove cloud-init permanently, use the following commands:
“`
sudo apt purge cloud-init -y
sudo rm -rf /etc/cloud /var/lib/cloud/
“`
This approach is more radical than the flexible mode, as it completely removes cloud-init and all its files. Therefore, it’s not recommended unless you have a specific reason to do so.
Why disable cloud-init?
There are several reasons why you might want to disable cloud-init:
1. Boot slower: Cloud-init can slow down the boot process, especially if you have a large amount of user data. Disabling cloud-init can improve the boot speed.
2. Console messaging: After the boot phase, cloud-init may display console messages that can be annoying or unnecessary. Disabling cloud-init can avoid these messages.
3. Customization: If you prefer to customize your instances manually, disabling cloud-init can give you more control over the configuration.
4. Scenarios: There are scenarios where cloud-init is not needed or desired. For example, if you’re running a highly-available cluster, you might want to disable cloud-init to avoid any potential issues.
Cloud images and user data
Cloud images are operating system templates, and every instance starts out as an identical clone of every other instance. It is the user data that gives every cloud instance its personality. Cloud-init can be used to apply user data to your instances automatically.
VMware Cloud Foundation and Minio
VMware Cloud Foundation is VMware’s unified SDDC platform for the hybrid cloud, based on VMware’s compute, storage, and network virtualization technologies. Minio is a new company built around an Open Source cloud storage product, built by veterans from Gluster. Gluster is a distributed filesystem that was purchased by Red Hat in 2011 for $136 million to use it as a base of their SDS vision.
VCDX-Cloud certification
Finally, after the first information and rumors about the VCDX-Cloud certification, the official page seems to be complete with all the information and all the certification path. We will probably see first VCDX-Cloud certified people starting from the second half of July 2013.
Conclusion
Cloud-init is a powerful configuration tool with room for improvement. Disabling cloud-init can improve boot speed, avoid console messages, and give you more control over your instances’ customization. However, it’s important to consider the reasons why you might want to disable cloud-init before making any changes.