Why I did it
Add the hardware reboot cause when the previous software reboot failed
How I did it
Check both hardware reboot cause and software reboot cause.
Add the hardware reboot as actual reboot cause
if any hardware reboot cause is available for any software reboot.
How to verify it
Perform reboots and verify the reboot-cause
[201811] Check platform reboot cause to see if any reset happened during fast/warm-reboot
Why I did it
To recover syncd and swss from any cold reset during fast/warm-reboot
How I did it
Check platform reboot-cause to see if any cold reset happens for fast-reboot power up
How to verify it
Manual test
* [process-reboot-cause]Address the issue: Incorrect reboot cause returned when warm reboot follows a hardware caused reboot
1. check whether /proc/cmdline indicates warm/fast reboot.
if yes the software reboot cause file will be treated as the reboot cause.
finish
2. check whether platform api returns a reboot cause.
if yes it is treated as the reboot cause.
finish.
3. check whether /hosts/reboot-cause contains a cause.
if yes it is treated as the cause otherwise return unknown.
* [process-reboot-cause]Fix review comments
* [process-reboot-cause]address comments
1. use "with" statement
2. update fast/warm reboot BOOT_ARG
* [process-reboot-cause]address comments
* refactor the code flow
* Remove escape
* Remove extra ':'
* backport new platform api to 201811, reboot cause part
* install new platform api on host
* 1. remove chassis's dependency on sonic_platform_daemon.
2. add some mellanox-specific hardware reboot causes.
3. fix typo in files/image_config/process-reboot-cause/process-reboot-cause.
* 1. add dependency of sonic_platform for base image
2. handle the case of reboot cause file not found
* adjust log message.
In case of going from previous iteration of SONiC, and the last reboot
was hardware, REBOOT_CAUSE_FILE may not be present and the service may
throw an error.
