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Before expanding the cluster, make sure to apply to Arcfra in advance for the ACOS software license.
Check if the cluster has any third-party addons installed. If any, uninstall the addons before adding new nodes.
Refer to the Hardware requirements to confirm that the nodes to be added meet the hardware configuration requirements.
Confirm the server CPU architecture of the cluster and the installed ACOS software version, and prepare the ACOS installation image files for nodes to be added in advance.
For each new node to be added, plan two IP addresses: one ACOS management IP address and one ACOS storage IP address for the management network and storage network, respectively. Meanwhile, record the subnet mask, gateway, and other relevant information for both networks. If the existing ACOS integrates hardware management capabilities, you also need to plan IPMI IP addresses for the new nodes.
The IP addresses for a new node can be planned as follows:
The storage network of the new node must belong to the same subnet as that of the existing nodes in the ACOS (AVE) cluster.
The ACOS management IP address and storage IP address of the new node cannot be assigned to the same network segment.
The ACOS management IP address of the new node must be assigned to the same network segment as that of the existing cluster nodes.
The ACOS storage IP address of the new node can reach those of the existing cluster nodes.
The IP addresses cannot overlap with any IP addresses within the following CIDR ranges:
If the new node previously belonged to another cluster, do not reuse its ACOS management IP address and storage IP address from the original cluster.
Information:
You can view the IP address configuration of existing ACOS (AVE) cluster nodes by logging in to AOC, selecting a host in the cluster from the left sidebar, and checking the host overview panel that appears on the right.
If the cluster to be expanded has Boost, RDMA, or volume pinning enabled, make sure the software and hardware configurations of the node to be added meet the requirements for enabling these features as described in Boost mode requirements, RDMA requirements, and Volume pinning requirements.
ACOS clusters support normal and large-capacity specifications. Ensure that the capacity specifications of the new nodes are consistent with those of the existing nodes in the cluster to be expanded.
If the ACOS cluster is all-flash and uses the same type of storage media, ensure that the new nodes are also all-flash and use the same type of storage media as the existing cluster.