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Create an Ubuntu Work Cluster on CentOS Management Platform

This article explains how to create an Ubuntu work cluster on an existing CentOS management platform.

Note

This article is only applicable for offline mode, using the DCE 5.0 platform to create a work cluster with an AMD architecture. The management platform and the cluster being created should both have an AMD architecture. Creating mixed clusters (AMD and ARM) is not supported during cluster creation. However, you can manage mixed clusters by adding heterogeneous nodes after the cluster creation.

Prerequisites

Procedure

Download and Import Ubuntu Offline Packages

Make sure you are logged in to the "bootstrap" node and that you still have the clusterConfig.yaml file used during the deployment of DCE 5.0.

Download Ubuntu Offline Packages

Download the required Ubuntu OS package and ISO offline packages:

Resource Name Description Download Link
os-pkgs-ubuntu1804-v0.6.6.tar.gz Ubuntu1804 OS package Download
ISO offline package Script to import OS package http://mirrors.melbourne.co.uk/ubuntu-releases/
import-iso Script to import ISO Download

Import Ubuntu OS Package to the "bootstrap" Node's MinIO

Extract the Ubuntu OS package

Run the following command to extract the downloaded OS package:

# Replace 'os-pkgs-ubuntu1804-v0.6.6.tar.gz' with the actual name of the Ubuntu OS package you downloaded
tar -xvf os-pkgs-ubuntu1804-v0.6.6.tar.gz

The extracted contents of the OS package are as follows:

    os-pkgs
    ├── import_ospkgs.sh       # Script used to import OS packages to the MinIO file service
    ├── os-pkgs-amd64.tar.gz   # OS packages for amd64 architecture
    ├── os-pkgs-arm64.tar.gz   # OS packages for arm64 architecture
    └── os-pkgs.sha256sum.txt  # sha256sum verification file for OS packages

Import OS Packages to the MinIO on the "bootstrap" Node

Run the following command to import the OS packages to the MinIO file service:

MINIO_USER=rootuser MINIO_PASS=rootpass123 ./import_ospkgs.sh  http://127.0.0.1:9000 os-pkgs-ubuntu1804-v0.6.6.tar.gz

Note

The above command is only applicable for the built-in MinIO service on the "bootstrap" node. If you are using an external MinIO service, please replace "http://127.0.0.1:9000" with the access address of your external MinIO. "rootuser" and "rootpass123" are the default credentials for the built-in MinIO service on the "bootstrap" node. "os-pkgs-ubuntu1804-v0.6.6.tar.gz" should be replaced with the actual name of the downloaded OS package offline package.

Import ISO Offline Package to the MinIO on the "bootstrap" Node

Run the following command to import the ISO package to the MinIO file service:

MINIO_USER=rootuser MINIO_PASS=rootpass123 ./import_iso.sh http://127.0.0.1:9000 ubuntu-16.04.7-server-amd64.iso

Note

The above command is only applicable for the built-in MinIO service on the "bootstrap" node. If you are using an external MinIO service, please replace "http://127.0.0.1:9000" with the access address of your external MinIO. "rootuser" and "rootpass123" are the default credentials for the built-in MinIO service on the "bootstrap" node. "ubuntu-16.04.7-server-amd64.iso" should be replaced with the actual name of the downloaded ISO offline package.

Go to create cluster

Refer to Create Cluster to create a ubuntu cluster.

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