Upgrade from v6.4 to V7.0 failed

Hi ,

I upgraded from v6.4 to v7 using the yum as below . but having issues in starting service .

How to resolve or go back to old version .

Files Backup taken : grafana.db ,grafana.ini

Error :

yum upgrade grafana-7.0.0-1.x86_64.rpm
Loaded plugins: product-id, search-disabled-repos, subscription-manager
This system is not registered with an entitlement server. You can use subscription-manager to register.
Examining grafana-7.0.0-1.x86_64.rpm: grafana-7.0.0-1.x86_64
Marking grafana-7.0.0-1.x86_64.rpm as an update to grafana-6.4.2-1.x86_64
Resolving Dependencies
–> Running transaction check
—> Package grafana.x86_64 0:6.4.2-1 will be updated
—> Package grafana.x86_64 0:7.0.0-1 will be an update
–> Finished Dependency Resolution

Dependencies Resolved

===============================================================================================================================
Package Arch Version Repository Size

Updating:
grafana x86_64 7.0.0-1 /grafana-7.0.0-1.x86_64 141 M

Transaction Summary

Upgrade 1 Package

Total size: 141 M
Is this ok [y/d/N]: y
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Updating : grafana-7.0.0-1.x86_64 1/2
Job for grafana-server.service failed because the control process exited with error code. See “systemctl status grafana-server.service” and “journalctl -xe” for details.
warning: %post(grafana-7.0.0-1.x86_64) scriptlet failed, exit status 1
Non-fatal POSTIN scriptlet failure in rpm package grafana-7.0.0-1.x86_64
Cleanup : grafana-6.4.2-1.x86_64 2/2
POSTTRANS: Running script
linjump01 | 2.9 kB 00:00:00
Verifying : grafana-7.0.0-1.x86_64 1/2
Verifying : grafana-6.4.2-1.x86_64 2/2

Updated:
grafana.x86_64 0:7.0.0-1

Complete!

systemctl status grafana-server
● grafana-server.service - Grafana instance
Loaded: loaded (/usr/lib/systemd/system/grafana-server.service; disabled; vendor preset: disabled)
Active: failed (Result: start-limit) since Tue 2020-05-19 00:26:48 WIB; 16s ago
Docs: http://docs.grafana.org
Process: 5488 ExecStart=/usr/sbin/grafana-server --config={CONF_FILE} --pidfile={PID_FILE_DIR}/grafana-server.pid --packaging=rpm cfg:default.paths.logs={LOG_DIR} cfg:default.paths.data={DATA_DIR} cfg:default.paths.plugins={PLUGINS_DIR} cfg:default.paths.provisioning={PROVISIONING_CFG_DIR} (code=exited, status=1/FAILURE)
Main PID: 5488 (code=exited, status=1/FAILURE)

Not allowing to remove as well

yum remove grafana*
Loaded plugins: product-id, search-disabled-repos, subscription-manager
This system is not registered with an entitlement server. You can use subscription-manager to register.
No Match for argument: grafana-6.4.2-1.x86_64.rpm
No Match for argument: grafana-7.0.0-1.x86_64.rpm
No Match for argument: grafana.db.19May2020
No Match for argument: grafana_icon_1.svg
No Match for argument: grafana.ini
No Packages marked for removal
strong text

Hi,

Could you add the Grafana server logs please?