[reboiot-cause] Fix a broken symlink of previous-reboot-cause file removal issue#10751
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lizhuhuams merged 1 commit intosonic-net:masterfrom May 11, 2022
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…moval issue Signed-off-by: mlok <marty.lok@nokia.com>
lizhuhuams
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May 11, 2022
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| # Remove stale PREVIOUS_REBOOT_CAUSE_FILE if it exists | ||
| if os.path.exists(PREVIOUS_REBOOT_CAUSE_FILE): | ||
| if os.path.exists(PREVIOUS_REBOOT_CAUSE_FILE) or os.path.islink(PREVIOUS_REBOOT_CAUSE_FILE): |
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this change doesn't seem to make any difference.
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@mlok-nokia seems it is reverted but looks like we need this. Can you create PR ? wondering do you not see issue even though it is reverted ?
cc @judyjoseph for reference.
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… file removal issue (sonic-net#10751)" This reverts commit dee7655.
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liushilongbuaa
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…anch Related work items: #52, #71, #73, #75, #77, sonic-net#1306, sonic-net#1588, sonic-net#1991, sonic-net#2031, sonic-net#2040, sonic-net#2053, sonic-net#2066, sonic-net#2069, sonic-net#2087, sonic-net#2107, sonic-net#2110, sonic-net#2112, sonic-net#2113, sonic-net#2117, sonic-net#2124, sonic-net#2125, sonic-net#2126, sonic-net#2128, sonic-net#2130, sonic-net#2131, sonic-net#2132, sonic-net#2133, sonic-net#2134, sonic-net#2135, sonic-net#2136, sonic-net#2137, sonic-net#2138, sonic-net#2139, sonic-net#2140, sonic-net#2143, sonic-net#2158, sonic-net#2161, sonic-net#2233, sonic-net#2243, sonic-net#2250, sonic-net#2254, sonic-net#2260, sonic-net#2261, sonic-net#2267, sonic-net#2278, sonic-net#2282, sonic-net#2285, sonic-net#2288, sonic-net#2289, sonic-net#2292, sonic-net#2294, sonic-net#8887, sonic-net#9279, sonic-net#9390, sonic-net#9511, sonic-net#9700, sonic-net#10025, sonic-net#10322, sonic-net#10479, sonic-net#10484, sonic-net#10493, sonic-net#10500, sonic-net#10580, sonic-net#10595, sonic-net#10628, sonic-net#10634, sonic-net#10635, sonic-net#10644, sonic-net#10670, sonic-net#10691, sonic-net#10716, sonic-net#10731, sonic-net#10750, sonic-net#10751, sonic-net#10752, sonic-net#10761, sonic-net#10769, sonic-net#10775, sonic-net#10776, sonic-net#10779, sonic-net#10786, sonic-net#10792, sonic-net#10793, sonic-net#10800, sonic-net#10806, sonic-net#10826, sonic-net#10839, sonic-net#10840, sonic-net#10842, sonic-net#10844, sonic-net#10847, sonic-net#10849, sonic-net#10852, sonic-net#10865, sonic-net#10872, sonic-net#10877, sonic-net#10886, sonic-net#10889, sonic-net#10903, sonic-net#10904, sonic-net#10905, sonic-net#10913, sonic-net#10914, sonic-net#10916, sonic-net#10919, sonic-net#10925, sonic-net#10926, sonic-net#10929, sonic-net#10933, sonic-net#10934, sonic-net#10937, sonic-net#10941, sonic-net#10947, sonic-net#10952, sonic-net#10953, sonic-net#10957, sonic-net#10959, sonic-net#10971, sonic-net#10972, sonic-net#10980
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Why I did it
When the previous-reboot-cause has a broken symlink, the following back trace is shown in the syslog and system-running state show degraded. And rebooting the system will not be able to generated a new symlink of the new previous-reboot-cause.
fixes #10746
How I did it
Somehow, when the symlink file /host/reboot-cause/previous-reboot-cause is broken (which its destination files doesn't exist in this case), the current condition check "if os.path,exists(PREVIOUS_REBOOT_CAUSE_FILE)" will return False in determine-reboot-cause script. Hence, the current previous-reboot-cause is not been removed and the recreation of the new previous-reboot-cause failed. In case of previous-reboot-cause is a broken synlink file, add condition os.path.islink(PREVIOUS_REBOOT_CAUSE) to check and allow the remove operation happens.
How to verify it
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Description for the changelog
Link to config_db schema for YANG module changes
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