I had to change the IP of a vRealize Operations Manager 8.6 appliance and the given KB is somewhat overwhelming. I stripped it down for a single node deployment. You have to login via root shell and run:
#Stop CASA
service vmware-casa stop
#Change IP
/opt/vmware/share/vami/vami_set_network eth0 STATICV4 ipv4_addr ipv4_netmask ipv4_gateway
#Backup old Config
cp /storage/db/casa/webapp/hsqldb/casa.db.script /tmp/
cp /usr/lib/vmware-vcopssuite/utilities/sliceConfiguration/data/roleState.properties /tmp/
cp /usr/lib/vmware-vcops/user/conf/gemfire.properties /tmp/
cp /usr/lib/vmware-vcops/user/conf/gemfire.locator.properties /tmp/
cp /usr/lib/vmware-vcops/user/conf/gemfire.native.properties /tmp/
cp /usr/lib/vmware-vcops/user/conf/persistence/persistence.properties /tmp/
cp /usr/lib/vmware-vcops/user/conf/cassandra/cassandra.yaml /tmp/
cp /opt/vmware/etc/vami/ovfEnv.xml /tmp
cp /usr/lib/vmware-vcops/user/conf/cis.properties /tmp
#This replaces the IPs in the config files from 10.0.0.1 to 192.168.1.1, adapt it to your settings
sed -i 's/10.0.0.1/192.168.1.1/g' /storage/db/casa/webapp/hsqldb/casa.db.script
sed -i 's/10.0.0.1/192.168.1.1/g' /usr/lib/vmware-vcopssuite/utilities/sliceConfiguration/data/roleState.properties
sed -i 's/10.0.0.1/192.168.1.1/g' /usr/lib/vmware-vcops/user/conf/gemfire.properties
sed -i 's/10.0.0.1/192.168.1.1/g' /usr/lib/vmware-vcops/user/conf/gemfire.locator.properties
sed -i 's/10.0.0.1/192.168.1.1/g' /usr/lib/vmware-vcops/user/conf/gemfire.native.properties
sed -i 's/10.0.0.1/192.168.1.1/g' /usr/lib/vmware-vcops/user/conf/persistence/persistence.properties
sed -i 's/10.0.0.1/192.168.1.1/g' /usr/lib/vmware-vcops/user/conf/cassandra/cassandra.yaml
sed -i 's/10.0.0.1/192.168.1.1/g' /opt/vmware/etc/vami/ovfEnv.xml
sed -i 's/10.0.0.1/192.168.1.1/g' /usr/lib/vmware-vcops/user/conf/cis.properties
service vmware-casa start
#Replace ipv4_addr to new address
$VMWARE_PYTHON_BIN /usr/lib/vmware-vcopssuite/utilities/sliceConfiguration/bin/vcopsConfigureRoles.py --adminCS=/ipv4_addr/ > /dev/null 2>&1
Hope this helps.