Step 12: Build Cluster Node Images

The build_image_x86_64.yml and build_image_aarch64.yml playbooks are used to build diskless images for x86_64 and aarch64 cluster nodes, respectively. Each image is created based on the functional groups defined in the mapping file.

Caution

Limited validation has been performed on aarch64 platform.

Prerequisites:

Ensure the OIM has internet access.

Ensure that the mapping file contains nodes with the functional groups required for your environment. For more information on functional groups, see Step 2: Create Mapping File with Node Information.

Make sure the local_repo.yml is executed with software packages matching the target architecture. If the build is for x86_64, include software defined with x86_64. If the build is for aarch64, include software with aarch64. If the build needs to support both architectures, ensure local_repo.yml is executed with software_config.json that include both x86_64 and aarch64.

Ensure that OIMs running RHEL have an active subscription or are configured to access local repositories.

Note the compatibility between cluster OS and OIM OS below:

OIM OS

Cluster Node OS

Compatibility

RHEL

RHEL

Yes

Build Images for x86_64 Cluster Nodes

To build images for the nodes present in each functional group, do the following.

Navigate to the image build directory:
```
cd /omnia/build_image_x86_64
```
To build the image, run the following playbook:
```
ansible-playbook build_image_x86_64.yml
```
To verify that images are created for each functional group defined in the mapping file, run the following command on OIM:
```
s3cmd ls -Hr s3://boot-images
```
The images created for each functional group are listed in the boot-images directory.

Build Images for aarch64 Cluster Nodes

To build images for the nodes present in each functional group, do the following.

Prepare the aarch64 cluster nodes by following the steps provided in Preparing aarch64 Node.
Navigate to the image build directory:
```
cd /omnia/build_image_aarch64
```
To build the image, run the appropriate playbook based on the node architecture:
```
ansible-playbook build_image_aarch64.yml -i inventory
```
Sample aarch64 inventory:
```
[admin_aarch64]
10.0.0.1
```
To verify that images are created for each functional group defined in the mapping file, run the following command on the OIM:
```
s3cmd ls -Hr s3://boot-images
```
The images created for each functional group are listed in the boot-images directory.

If you have any feedback about Omnia documentation, please reach out at omnia.readme@dell.com.