Notes and Constraints

Kubernetes Versions

The version of Kubernetes clusters connected to UCS must be between 1.19 and 1.32.

Regions

When a cluster connects to UCS through a private network, you need to use Direct Connect or Virtual Private Network (VPN) to connect the on-premises network to VPCs, and use VPC Endpoint (VPCEP) to connect to UCS through the private network.

In this scenario, when creating a connection, VPN, VPC, or a VPC endpoint, you can only select AP-Singapore. No region restriction is involved if you are not using a private network to connect your cluster to UCS.

Functions

UCS is in open beta test (OBT). Service Meshes, Container Intelligent Analysis, and Operator Service Center are not yet available.

Quota Limits

Quotas put limits on the quantity or capacity of resources available to users. UCS has quota limits on clusters, fleets, permissions, and cluster federations, as listed in Table 1. If the default quotas provided by UCS cannot meet your service requirements, you can submit a service ticket to increase your quotas.

• Cluster quota: specifies the maximum number of clusters that can be connected to UCS. This quota consists of the numbers of Huawei Cloud clusters, on-premises clusters, partner cloud clusters, and attached clusters.
• Fleet quota: specifies the maximum number of fleets in an account.
• Permission quota: specifies the maximum number of permission policies that an account can create on the Permissions page.
• Cluster federation quota: specifies the maximum number of cluster federations that an account can enable. You cannot request a quota increase.

For other cloud services you may also use to run UCS, such as Elastic Cloud Server (ECS), Elastic Volume Service (EVS), Virtual Private Cloud (VPC), Elastic Load Balance (ELB), SoftWare Repository for Container (SWR), and Domain Name Service (DNS), their quotas are independent of UCS and are managed separately. For details, see Quotas.