1f3da955b9
[S6100] Improve S6100 serial-getty monitor, wait and re-check when getty not running to avoid false alert. This is cherry-pick PR for: https://github.com/sonic-net/sonic-buildimage/pull/14402 #### Why I did it On S6100, the serial-getty service some time can't auto-restart by systemd. So there is a monit unit to check serial-getty service status and restart it. However, this monit will report false alert, because in most case when serial-getty not running, systemd can restart it successfully. To avoid the false alert, improve the monitor to wait and re-check. Steps to reproduce this issue: 1. User login to device via console, and keep the connection. 2. User login to device via SSH, check the serial-getty@ttyS1.service service, it's running. 3. Run 'monit reload' from SSH connection. 4. Check syslog 1 minutes later, there will be false alert: ' 'serial-getty' process is not running' ##### Work item tracking - Microsoft ADO :17424426 #### How I did it Add check-getty.sh script to recheck again later when getty service not running. And update monit unit to check serial-getty service status with this script to avoid false alert. #### How to verify it Pass all UT. Manually check fixed code work correctly: ``` admin@***:~$ sudo systemctl stop serial-getty@ttyS1.service admin@***:~$ sudo /usr/local/bin/check-getty.sh admin@***:~$ echo $? 1 admin@***:~$ sudo systemctl status serial-getty@ttyS1.service ● serial-getty@ttyS1.service - Serial Getty on ttyS1 Loaded: loaded (/lib/systemd/system/serial-getty@.service; enabled-runtime; vendor preset: enabled) Active: inactive (dead) since Tue 2023-03-28 07:15:21 UTC; 1min 13s ago admin@***:~$ sudo /usr/local/bin/check-getty.sh admin@***:~$ echo $? 0 admin@***:~$ sudo systemctl status serial-getty@ttyS1.service ● serial-getty@ttyS1.service - Serial Getty on ttyS1 Loaded: loaded (/lib/systemd/system/serial-getty@.service; enabled-runtime; vendor preset: enabled) ``` syslog: ``` Mar 28 07:10:37.597458 *** INFO systemd[1]: serial-getty@ttyS1.service: Succeeded. Mar 28 07:12:43.010550 *** ERR monit[593]: 'serial-getty' status failed (1) -- no output Mar 28 07:12:43.010744 *** INFO monit[593]: 'serial-getty' trying to restart Mar 28 07:12:43.010846 *** INFO monit[593]: 'serial-getty' stop: '/bin/systemctl stop serial-getty@ttyS1.service' Mar 28 07:12:43.132172 *** INFO monit[593]: 'serial-getty' start: '/bin/systemctl start serial-getty@ttyS1.service' Mar 28 07:13:43.286276 *** INFO monit[593]: 'serial-getty' status succeeded (0) -- no output ``` #### Tested branch (Please provide the tested image version) - [x] 20201231.77 #### Description for the changelog [S6100] Improve S6100 serial-getty monitor. |
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| .. | ||
| common | ||
| debian | ||
| s5232f | ||
| s5248f | ||
| s5296f | ||
| s6000 | ||
| s6100 | ||
| tools | ||
| z9100 | ||
| z9264f | ||
| z9332f | ||
| .gitignore | ||
| LICENSE | ||
| README.md | ||
platform drivers for Dell Z9100 for the SONiC project