You're running a single node Aria Operations for Logs deployment and would like to expand it, let's make it a 3-node cluster (the smallest supported beyond 1), supported configurations can be found here. To do that, deploy a new Aria Operations for Logs appliance and join it to an existing deployment, documentation here.
I've downloaded the appropriate binary and deployed my appliance, let's now access the UI for Setup.
Click NEXT.
click JOIN EXISTING DEPLOYMENT. Here you will need the FQDN of your Primary Node and a Secure Join Token which can be generated on your existing Primary Node from Management - Cluster - GENERATE JOIN TOKEN.
Click GO, which will initialize your new Worker Node.
After a few minutes, back on the Primary Node, you can see that the Worker Node has joined the Cluster.
As indicated, 2-node clusters are not supported, so let's add another one, same steps as above.
Back on the Primary Node UI, you can now see we have a 3-Node Cluster.
A few things to note on your New Operations for Logs Cluster, all of which is documented here.
Nodes must all be the same size and in the same data center.
The Integrated Load Balancer used with Clusters requires that Nodes be in the same L2 network.
Aria Operations for Logs Nodes (VMs) must be excluded from VMware NSX DFW Protection.
This next part I'm taking directly from the documenation, as it's so important.
An Aria Operations for Logs cluster can include 3 to 18 nodes. When nodes are offline or unhealthy, the feature availability depends on the minimum number of nodes that are available for the cluster to run functionalities. The following table lists the maximum number of nodes that can fail to maintain a healthy/active cluster:
Number of nodes in a cluster | Number of nodes that can fail |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 1 |
5 | 2 |
6 | 2 |
7-18 | 3 |
If the primary node is unhealthy/offline,
You might experience UI limitations in accessing cluster details and statistics.
You cannot add new nodes.
You cannot remove existing nodes
Built in HA, great stuff! Aria Operations for Logs is a powerful platform, check it out!
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