Enabling Cluster Federation
Enabling Cluster Federation
You can enable cluster federation for a fleet with just a few clicks.
Enabling cluster federation involves two phases: enabling cluster federation and adding clusters to the federation. Enabling cluster federation for a fleet will federate the registered clusters in the fleet.
There is a quota limit for enabling cluster federation, and there are constraints on clusters in a fleet. Before enabling cluster federation, read the following constraints to avoid failures.
Item |
Constraint |
---|---|
Cluster version |
The versions of all clusters in the fleet must be 1.19 or later. |
Cluster status |
All clusters in the fleet must be in the Running status. |
Cluster network |
|
Quota |
The cluster federation quota is 1. This means cluster federation can be enabled only for one fleet. |
- Log in to the UCS console. In the navigation pane, choose Fleets.
- On the Fleets tab, locate the target fleet displayed with Federation not enabled. Click Enable.
Figure 1 Enabling cluster federation
- In the displayed dialog box, click OK. Then, wait until cluster federation is enabled.
If the clusters in the fleet do not meet the constraints, an error message will be displayed. Modify the clusters as prompted and enable cluster federation again.
It takes about 10 minutes to enable cluster federation. You can click the federation status to view the detailed enabling progress. After cluster federation is enabled, a message will be displayed.
Adding Clusters
After cluster federation is enabled for a fleet, you can continue to add clusters to the fleet. The new clusters are automatically federated. A federation can have a maximum of 20 clusters.
- Log in to the UCS console. In the navigation pane, choose Fleets.
- In the card view of the target fleet, click Add Cluster, or click in the upper right corner.
You can also click the fleet name to access the fleet console. In the navigation pane, choose Container Clusters. On the displayed page, click Add Cluster in the upper right corner.
- Select one or more existing clusters. A cluster can only be added to one fleet. The clusters displayed in the list are those have not been added to any fleet.
Ensure that the selected clusters meet the constraints described in Table 1. Otherwise, the clusters can be added to the fleet but fail to be federated. If clusters fail to be federated, perform operations in Why Cannot I Enable Cluster Federation for a Fleet or Register a Cluster to a Fleet After Cluster Federation Is Enabled?
- Click OK.
Managing Federation
After cluster federation is enabled for a fleet, the Federation module on the fleet's details page is automatically unlocked.
Next, you can create federated resources such as federated workloads, Services, and storage for deploying your service. You can also perform advanced operations such as multi-active DR and auto scaling for multi-cluster applications.
Disabling Cluster Federation
If you do not need to use cluster federation, you can disable it. After cluster federation is disabled, services running on the workloads are not affected.
- Log in to the UCS console. In the navigation pane, choose Fleets.
- On the Fleets tab page, locate the target fleet and click Disable Federation in the upper right corner.
Figure 3 Disabling cluster federation
- In the displayed dialog box, click OK.
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