Upgrading from Oracle Linux 8.x to Oracle Linux 9.x

To upgrade from Oracle Linux 8.x to Oracle Linux 9.x:

1. Run the following commands to disable KUMA services on the hosts where the services are installed:
   • sudo systemctl disable kuma-collector-<service ID>.service
   • sudo systemctl disable kuma-correlator-<service ID>.service
   • sudo systemctl disable kuma-storage-<service ID>.service
   • sudo systemctl disable kuma-grafana.service
   • sudo systemctl disable kuma-mongodb.service
   • sudo systemctl disable kuma-victoria-metrics.service
   • sudo systemctl disable kuma-vmalert.service
   • sudo systemctl disable kuma-core.service
2. Upgrade the OS on every host.
3. After the upgrade is complete, run the following command to install the compat-openssl11 package on the host where you want to deploy the KUMA Core outside of the cluster:

   yum install compat-openssl11

4. Run the following commands to enable the services on the hosts where the services are installed:
   • sudo systemctl enable kuma-core.service
   • sudo systemctl enable kuma-storage-<service ID>.service
   • sudo systemctl enable kuma-collector-<service ID>.service
   • sudo systemctl enable kuma-correlator-<service ID>.service
   • sudo systemctl enable kuma-grafana.service
   • sudo systemctl enable kuma-mongodb.service
   • sudo systemctl enable kuma-victoria-metrics.service
   • sudo systemctl enable kuma-vmalert.service
5. Restart the hosts.

As a result, the upgrade is completed.