couple questions for Event Log

[Bills, Jason M]

On 1/18/2019 1:28 AM, 刘锡伟 wrote:
> Hi
> 
> 1.How to debug the system event log, how to configure it, and what 
> modules are related to the log function?

Can you provide more detail?  Are you looking specifically for IPMI SEL 
or general BMC logging through phosphor-logging?

> 
> 2.When is the phosphor-sel-logger registration method (IpmiSelAdd, 
> IpmiSelAddOem) invoked? How to use DBUS to read journalctl?

phosphor-sel-logger runs as a service and exposes the IpmiSelAdd and 
IpmiSelAddOem methods on D-Bus.  When either of those methods is 
invoked, the phosphor-sel-logger creates an IPMI SEL entry in the system 
journal using the provided data.  The journal can then be parsed to 
extract the SEL entries as found in 
https://gerrit.openbmc-project.xyz/c/openbmc/intel-ipmi-oem/+/16280.

journalctl is a command-line utility to read the system journal, so it 
isn't used over D-Bus.  Details on journalctl can be found here: 
https://www.freedesktop.org/software/systemd/man/journalctl.html.

If you want to read the journal in source, you can use the sd_journal 
APIs here: 
https://www.freedesktop.org/software/systemd/man/sd_journal.html#. 
Example usage is in the gerrit review above.

> 
> 3.Could anyone share a description of the yaml file about phosphor-logging?
> 
> Thanks
> 
> 
> 

Thanks,
-Jason