To upgrade from Oracle Linux 8.x to Oracle Linux 9.x:
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-metrics-<
metrics service ID
>.service
sudo systemctl disable kuma-vmalert.service
sudo systemctl disable kuma-core-<
KUMA Core service ID
>.service
yum install compat-openssl11
sudo systemctl enable kuma-core-<
KUMA Core service ID
>.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-metrics-<
metrics service ID
>.service
sudo systemctl enable kuma-vmalert.service
As a result, the upgrade is completed.
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