Add Additional Nodes to Create an HA Cluster

this topic provides instructions on how to create a high availability (ha) cluster and assumes you have already run the turbine platform installer on the first node please see install turbine on an embedded kubernetes cluster docid\ p ps6e57xmmp08pqndgfm if you have not yet installed on the first node ha considerations ha clusters require at least 3 nodes and the total number of nodes must be an odd number only one mongodb pod can run on a node for example, you need 3 nodes in a cluster if you want to go to 3 mongodb pods to enable a replica set the first node that the initial install is running on should be in the target group to start the additional nodes should only be added to the target groups after they’ve been joined to the cluster to add additional nodes to a cluster from the turbine platform installer ui, click the cluster management tab the cluster management page displays your installed nodes click add a node under add a node, ensure that you have selected primary node and then click copy command important! the code generated here expires after time swimlane recommends that you always copy the code as you work to add additional nodes do not save the code for use later go to your command line interface (cli) and paste the copied command for your additional nodes note you can add multiple nodes simultaneously if your environment requires a proxy then the additionalnoproxyaddresses override option must include an ip range in cidr notation that encompasses the new node's private ip if it does not then you will need to update the installer override file to add the new node's private ip to the additionalnoproxyaddresses list and specify the override file when running the join node command on the new node, and then re run the install command on every other node with the installer override file specified failure to ensure that all nodes have the updated additionalnoproxyaddresses list will result in cluster networking issues and issues with the turbine platform see the define proxy settings docid 4rkkazfikddzy yoveyby topic for more information on specifying proxy settings repeat the steps above for each node you want to add to the cluster once you have 3 or more nodes you can continue to the next step back in the turbine platform installer ui, click the application tab, and then click config scroll down to the heading ha settings select ha environment and click save config once you save the new configuration, you are prompted to view the new version click go to new version on version history, click deploy return to the application tab once the application status is ready you have added the additional nodes to your ha turbine environment add the new nodes to the load balancer target groups