OSMS: No OS Management information and error “ 403 403 Client Error”

APPLIES TO

Oracle Cloud Infrastructure

Linux x86-64

Symptoms

OCI Linux Instance OSMS Agent Tab shows error “No OS management information is available for this resource.”

In the OSMS agent log, following errors are reported,

--/var/log/oracle-cloud-agent/plugins/osms/agent.log--

024-03-18 07:40:38,660 - ERROR - Error checking actions (next check in 240 seconds): 
Command: ['osms', '--log-level', 'INFO', 'register', '--server-url', 'http://127.0.0.1:9003/XMLRPC'] failed (1): stderr: b'' stdout: b'
Command failed: <ProtocolError for http://127.0.0.1:9003/XMLRPC: 403 403 Client Error: Forbidden for url: http://127.0.0.1:9003/XMLRPC>\n'

OSMS Policies are configured as below,

Allow service osms to read instance-family in tenancy
Allow group OCI_Administrators to manage osms-family in tenancy 
Allow dynamic-group OS_Management to read instance-family in tenancy
Allow dynamic-group OS_Management to use osms-managed-instances in tenancy