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Red Hat Enterprise Linux in Azure

This automation relies on cloud-init for a substantial amount of the environment preparation. Currently the only RHEL image in Azure that supports cloud-init is 7-RAW-CI, which is in preview. More details here

Since 7-RAW-CI is a preview image, it is not recommended to use this in production, but rather include cloud-init in the normal golden image creation process.

RHEL 7.4 and earlier may also require some additional settings for mounting Azure Files. Azure Files is needed for shared storage in the icp-ee templates, and also when using the kubernetes integration for dynamic volume provisioning. Details available here

cloud-init in RHEL

For cloud-init to work on RHEL you will need a few steps in preparation

  1. Install cloud-init
sudo yum -y install cloud-init
  1. Create a hostname wrapper file saved in /etc/cloud/hostnamewrapper.sh
#!/bin/bash

if [[ -n $1 ]]; then
  /bin/hostnamectl set-hostname $1
else
  /bin/hostname
fi
  1. Ensure hostname wrapper is called by creating /etc/cloud/cloud.cfg.d/90-hostnamectl-workaround-azure.cfg
datasource:
  Azure:
    hostname_bounce:
      hostname_command: /etc/cloud/hostnamewrapper.sh
  1. Ensure Azure datasource is enabled by creating /etc/cloud/cloud.cfg.d/91-azure_datasource.cfg
datasource_list: [ Azure ]