This provides documentation beyond what is in the tool's help text.
An IP address or hostname, password, and username are required for connecting to a BMC.
These are passed in with the following options:
-H: The hostname or IP for the BMC-U: The username One of the password options:-P: The password, provided in-line-A: Prompt for a password-E: Take the password from envvar OPENBMCTOOL_PASSWORDThe local user accounts on the BMC, such as root, can be disabled, queried, and re-enabled with the 'local_users' sub-command.
Important: After disabling local users, an LDAP user will need to be used for further interaction with the BMC, including if using openbmctool to enable local users again.
To view current local user account status:
openbmctool <connection options> local_users queryenabled
To disable all local user accounts:
openbmctool <connection options> local_users disableall
To re-enable all local user accounts:
openbmctool <connection options> local_users enableall
The BMC has the ability to stream out local logs (that go to the systemd journal) via rsyslog.
The BMC will send everything. Any kind of filtering and appropriate storage will have to be managed on the rsyslog server. Various examples are available on the internet. Here are few pointers: https://www.rsyslog.com/storing-and-forwarding-remote-messages/ https://www.rsyslog.com/doc/rsyslog%255Fconf%255Ffilter.html https://www.thegeekdiary.com/understanding-rsyslog-filter-options/
openbmctool <connection options> logging remote_logging_config -a <IP address> -p <port>
The IP address and port to be provided are of the remote rsyslog server. Once this command is run, the remote rsyslog server will start receiving logs from the BMC.
Hostname can be specified instead of IP address, if DNS is configured on the BMC.
openbmctool <connection options> logging remote_logging disable
It is recommended to disable remote logging before switching remote logging from an existing remote server to a new one (i.e before re-running the remote_logging_config option).
openbmctool <connection options> logging remote_logging view
This will print out the configured remote rsyslog server's IP address and port, in JSON format.
Certificate management allows replacing the existing certificate and private key file with another (possibly certification Authority (CA) signed) certificate and private key file. Certificate management allows the user to install server, client and root certificates.
openbmctool <connection options> certificate update server https -f <File>
File: The PEM file containing both certificate and private key.
openbmctool <connection options> certificate update client ldap -f <File>
File: The PEM file containing both certificate and private key.
openbmctool <connection options> certificate update authority ldap -f <File>
File: The PEM file containing only certificate.
openbmctool <connection options> certificate delete server https
Deleting a certificate will create a new self-signed certificate and will install the same.
openbmctool <connection options> certificate delete client ldap
openbmctool <connection options> certificate delete authority ldap
Deleting the root certificate can cause an LDAP service outage. Please refer to the LDAP documentation before using this command.
In BMC, LDAP is used for remote authentication. BMC doesn't support remote user-management functionality.
BMC supports secure/non-secure LDAP configuration.
openbmctool.py <connection options> ldap enable --uri="ldap://<ldap server IP/hostname>" --bindDN=<bindDN> --baseDN=<basDN> --bindPassword=<bindPassword> --scope="sub/one/base" --serverType="OpenLDAP/ActiveDirectory"
NOTE: configuring FQDN (fully qualified domain name/ hostname) in the "uri" parameter requires that DNS server be configured on the BMC.
NOTE: Currently, openbmctool doesn't support configuring the DNS server on the BMC.
openbmctool.py <connection options> ldap enable --uri="ldaps://<ldap server IP/hostname>" --bindDN=<bindDN> --baseDN=<basDN> --bindPassword=<bindPassword> --scope="sub/one/base" --serverType="OpenLDAP/ActiveDirectory"
NOTE: a) It is quite common to encounter the following error when running the openbmctool.py command string shown above:
xyz.openbmc_project.Common.Error.NoCACertificate
This error means that the BMC client needs to verify that the LDAP server's certificate has been signed by a known CA. The service action would be for the admin to upload the CA certificate to the BMC.
To upload the CA certificate to the BMC, refer to the "Update LDAP root certificate" section of this document.
b) openbmctool doesn't support individual LDAP config property update, To update a single property user need to recreate the LDAP config with the changed values.
openbmctool.py <connection options> ldap disable
NOTE: Make sure that root user is enabled before running the above command otherwise BMC would not be accessible.
To enable root user, refer to the "To re-enable all local user accounts" section of this document.
Currently openbmctool doesn't have support for specific user enablement.
openbmctool.py <connection options> ldap privilege-mapper create --groupName=<groupName> --privilege="priv-admin/priv-user"
openbmctool.py <connection options> ldap privilege-mapper delete --groupName=<groupName>
openbmctool.py <connection options> ldap privilege-mapper list
The normal workflow for LDAP configuration would be as shown below
NOTE:
a) If a user tries to login with LDAP credentials and has not added the privilege mapping for the LDAP credentials then the user will get the following http error code and message.
403, 'LDAP group privilege mapping does not exist'.
Action: Add the privilege (refer to the section "Add privilege mapping")
b) The following message may mean that the user lacks the required privileges on the BMC: "Insufficient Privilege"
Action: Add the privilege (refer to the section "Add privilege mapping") with privilege=priv-admin
c) Once LDAP is set up, openbmctool connection options work with both LDAP and local users.