Add, drain, remove, taint, or uncordon a node in a cluster under the Cluster Administration textual UI menu item.
If you deployed your Cortex XSOAR environment starting with three nodes, using the textual UI menu in your VM you can add a node, taint a node, remove a node, drain a node, and uncordon a node.
Important
If you deployed your Cortex XSOAR environment as a standalone (single node), you cannot add nodes to it and switch to a cluster.
A Kubernetes cluster consists of a control plane and one or more worker nodes. For Cortex XSOAR, in standalone (one VM), the VM acts as both control plane and as a worker node. In multi-node clusters, the first three nodes act as both control plane and as worker nodes, and any additional node added acts as a worker node.
If you remove one of the original three nodes in the cluster (one of the control planes), you cannot perform actions such as upgrade or scaling up. When you add a new node, Cortex XSOAR automatically assigns the new node as a control plane with the same IP address as the node that was removed.
You need to set the host again and reestablish trust between all the nodes if you want to add more nodes to the cluster after completing installation.
Add a node
Add a node to a cluster to increase its capacity, improve performance, or enhance redundancy for better load distribution.
From the textual UI menu in your VM, select Cluster Administration.
Set the host again and reestablish trust between all nodes in the cluster, including the new node. For more information, see Task 5. Establish trust between all nodes in a cluster.
Select Add Node.
Enter the IP Address and click Add.
Taint a node
Tainting a node marks the node as out of service for internal K8s functions. Taint a node to stop applications from running on it.
From the textual UI menu in your VM, select Cluster Administration.
Select the IP address of the node you want to taint.
Select Taint.
In the list of nodes in the Cluster Administration menu, the node IP will display as Ready,SchedulingDisabled.
Remove a node
Remove a node from a cluster to reduce resources, perform maintenance, or decommission the node, ensuring the cluster operates efficiently without unnecessary or malfunctioning components.
From the textual UI menu in your VM, select Cluster Administration.
Drain the node.
Select the IP address of the node you want to drain.
Select Drain.
In the list of nodes in the Cluster Administration menu, the node IP will display as Ready,SchedulingDisabled.
Remove the node.
Select the IP address of the node you want to remove.
Select Remove.
In the list of nodes in the Cluster Administration menu, the node IP will display as Ready.
Drain a node
Draining a node pauses the node activity in the cluster and marks it as unschedulable. Draining a node safely removes workloads from it, ensuring that running applications are gracefully terminated or moved to other nodes without disrupting service availability before you perform maintenance on the node.
From the textual UI menu in your VM, select Cluster Administration.
Select the IP address of the node you want to drain.
Select Drain.
In the list of nodes in the Cluster Administration menu, the node IP will display as Ready,SchedulingDisabled.
Uncordon a node
Uncordon a node in a cluster to make it available again for scheduling new workloads, for example after maintenance or troubleshooting is complete.
From the textual UI menu in your VM, select Cluster Administration.
Select the IP address of the node you want to uncordon
Select Uncordon.
In the list of nodes in the Cluster Administration menu, the node IP will display as Ready.