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Deploying and managing RHEL on Amazon Web Services
3.2. Deploying a RHEL instance by using a custom base image

3.2. Deploying a RHEL instance by using a custom base image

To manually configure a virtual machine (VM), first create a base (starter) image. Then, you can modify configuration settings and add the packages the VM requires to operate on the cloud. You can also make additional configuration changes for your specific application after you upload the image.

Creating a VM from a base image has the following advantages:

Fully customizable
High flexibility for any use case
Lightweight - includes only the operating system and the required runtime libraries

To create a custom base image of RHEL from an ISO image, you can use the command line interface (CLI) or the web console for creating and configuring VM.

注意

Verify the following VM configurations.

SSH - Enable SSH to give remote access to your VM.
DHCP - Configure the primary virtual adapter to use DHCP.

Prerequisites

You have enabled virtualization on the host machine.
For web console, ensure the following options:
You have not checked the Immediately Start VM option.
You have already changed the Memory size to your preferred settings.
You have changed the Model option under Virtual Network Interface Settings to virtio and vCPUs to the capacity settings for the VM.

Procedure

Configure the Red Hat Enterprise Linux (RHEL) VM:
1. To install from the command line (CLI), ensure that you set the default memory, network interfaces, and CPUs according to your requirement for the VM. For details, see Creating virtual machines by using the command line
2. To install from the web console, see Creating virtual machines by using the web console
When the installation starts:
1. Create a root password.
2. Create an administrative user account.
After the installation completes, reboot the VM and log in to the root account.
After logging in as root, you can configure the image.
Register the VM and enable the RHEL repository:
```
# subscription-manager register
```
For AMD64 or Intel 64 (x86_64) VMs, install the nvme, xen-netfront, and xen-blkfront drivers:
```
# dracut -f --add-drivers "nvme xen-netfront xen-blkfront"
```
For ARM 64 (aarch64) VMs, install the nvme driver:
```
# dracut -f --add-drivers "nvme"
```
Including these drivers prevents a dracut time-out.
Alternatively, you can add the drivers to /etc/dracut.conf.d/ and then enter dracut -f to overwrite the existing initramfs file.

Verification

Verify if the system has the cloud-init package and enable it:

# dnf install cloud-init
# systemctl enable --now cloud-init.service

Power off the VM.

3.2. Deploying a RHEL instance by using a custom base image

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