tree 4f4abeb43b4025dfaaf4f804e08a97d4983d7084
parent 3281cd38bb00d1dc09caac55e2a4f22f0ffbdf4d
author Willy Tu <wltu@google.com> 1690790748 -0700
committer Willy Tu <wltu@google.com> 1692312258 +0000

meta-google: rsyslog: Disable ForwardToSyslog

In rsyslog, the logs are read via the journal files like with
`journalctl`. The socket used by ForwardToSyslog is not used at all
(`run/systemd/journal/syslog`), so we will disable the forwarding to
avoid unnecessary work.

With the logs spamming the CPU usage of systemd-journald went down
after this change.

Before:
Always top 1 or two in CPU usage,
```
PID USER       PRI  NI  VIRT   RES   SHR S  CPU%-MEM%   TIME+  Command
30892 root        20   0 23520 10108  9720 R  84.3  1.0  0:37.72 /usr/lib/systemd/systemd-journald
```

After:
Less CPU usage overall.
```
PID USER       PRI  NI  VIRT   RES   SHR S  CPU%-MEM%   TIME+  Command
30976 root        20   0 23520  7608  7216 R  40.8  0.8  2:32.36 /usr/lib/systemd/systemd-journald
```

Reference:
- https://www.freedesktop.org/software/systemd/man/journald.conf.html#Forwarding%20to%20traditional%20syslog%20daemons

Change-Id: I50cf868d63697fc9b72529863bb83d249f3275c7
Signed-off-by: Willy Tu <wltu@google.com>