Todd Benivegna
2020-Aug-05 00:44 UTC
[Nut-upsuser] Synology NAS is shutting down Ubuntu servers after very brief power outage (fwd)
> Sorry. I've lost the thread here, what is the "it" you refer to?I’m not an linux expert so you’ll have to bear with me, but I guess the it I was referring to whatever NUT is using since what we’re editing is a config file, not a script; it doesn’t have a shebang at the top.> If you run the command > > grep nut /etc/passwordI got: grep: /etc/password: No such file or directory> can be seen on > a Debian box with the command > > ls -alF /bin/shI got: lrwxrwxrwx 1 root root 4 Apr 23 11:02 /bin/sh -> dash* Also I did "echo $SHELL" in a terminal window and got "/bin/bash”. So what I found earlier is true; Bash is used in the Terminal app and Dash is used for scripts. So anyway, I guess that means that it is using Dash then, correct? Ok, so I copied the getUPSstatus function in .profile as well. So it has been added to both .bashrc and .profile and I have added... SHUTDOWNCMD "getUPSstatus ups at 192.168.1.70 ; logger -t upsmon.conf \"UPS status is $UPSstatus\" ; /sbin/shutdown -h +0" …to my upsmon.conf. So I think I should be go to go for the next time this happens; should get some more information as to what is going on. Also, I was thinking about your suggestion, Manuel, to use Wireshark as well. You mentioned,> My first suspect is the Synology version of nut. More specifically, I suspect that nut triggers a shutdown immediately after the switch to "on battery" state and only cancels it after a restart.That may seem to be the case, however, whenever I test by manually pulling the power, the servers stay up and all appears normal. It has happened three times now where I am away and the power goes out for 3-5 seconds and the servers shutdown and will stay down, even if I try to power back on, until I restart the Synology NAS. Thanks for both your guys’ help with everything so far…. I really appreciate it. Todd -- Todd Benivegna // todd at benivegna.com On Aug 4, 2020, 2:38 PM -0400, Roger Price <roger at rogerprice.org>, wrote:> On Tue, 4 Aug 2020, Todd Benivegna wrote: > > > Right, but I don't know what NUT script is actually calling it. I don't know how else I would check. > > Sorry. I've lost the thread here, what is the "it" you refer to? > > If you run the command > > grep nut /etc/password > > you will probably receive a reply similar to > > nut:x:121:126::/var/lib/nut:/bin/false > > The /bin/false implies that user nut uses the default shell which can be seen on > a Debian box with the command > > ls -alF /bin/sh > lrwxrwxrwx 1 root root 4 Jan 24 2017 /bin/sh -> dash* > > This says that Dash is the default for the command line and for scripts. As > Manuel has said this can be changed with the first line of a script, e.g. > > #!/bin/bash > > says that this script uses Bash. > > Roger > _______________________________________________ > Nut-upsuser mailing list > Nut-upsuser at alioth-lists.debian.net > https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/nut-upsuser-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://alioth-lists.debian.net/pipermail/nut-upsuser/attachments/20200804/216c8d32/attachment.html>
Roger Price
2020-Aug-05 07:26 UTC
[Nut-upsuser] Synology NAS is shutting down Ubuntu servers after very brief power outage (fwd)
On Tue, 4 Aug 2020, Todd Benivegna wrote:> Sorry. I've lost the thread here, what is the "it" you refer to? > > I’m not an linux expert so you’ll have to bear with me, but I guess the it I > was referring to whatever NUT is using since what we’re editing is a config > file, not a script; it doesn’t have a shebang at the top.The command sequence specified by the SHUTDOWNCMD declaration is called from upsmon (a program written in C).> If you run the command > grep nut /etc/password > > I got: grep: /etc/password: No such file or directorySorry, my mistake it should be grep nut /etc/passwd> That may seem to be the case, however, whenever I test by manually pulling the > power, the servers stay up and all appears normal. It has happened three > times now where I am away and the power goes out for 3-5 seconds and the > servers shutdown and will stay down, even if I try to power back on, until I > restart the Synology NAS.In your manual test do you restore utility power after 3-5 seconds? Roger
Todd Benivegna
2020-Aug-05 11:29 UTC
[Nut-upsuser] Synology NAS is shutting down Ubuntu servers after very brief power outage (fwd)
> grep nut /etc/passwdnut:x:129:134::/var/lib/nut:/usr/sbin/nologin> In your manual test do you restore utility power after 3-5 seconds?Yes, I have tried that. I have also tried less than one second. I’ve tried for 1-2 minutes, for 3-5 minutes, I’ve tried just about every length of time and all appears Ok when I manually test. -- Todd Benivegna // todd at benivegna.com On Aug 5, 2020, 3:26 AM -0400, Roger Price <roger at rogerprice.org>, wrote:> On Tue, 4 Aug 2020, Todd Benivegna wrote: > > > Sorry. I've lost the thread here, what is the "it" you refer to? > > > > I’m not an linux expert so you’ll have to bear with me, but I guess the it I > > was referring to whatever NUT is using since what we’re editing is a config > > file, not a script; it doesn’t have a shebang at the top. > > The command sequence specified by the SHUTDOWNCMD declaration is called from > upsmon (a program written in C). > > > If you run the command > > grep nut /etc/password > > > > I got: grep: /etc/password: No such file or directory > > Sorry, my mistake it should be > > grep nut /etc/passwd > > > That may seem to be the case, however, whenever I test by manually pulling the > > power, the servers stay up and all appears normal. It has happened three > > times now where I am away and the power goes out for 3-5 seconds and the > > servers shutdown and will stay down, even if I try to power back on, until I > > restart the Synology NAS. > > In your manual test do you restore utility power after 3-5 seconds? > > Roger > _______________________________________________ > Nut-upsuser mailing list > Nut-upsuser at alioth-lists.debian.net > https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/nut-upsuser-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://alioth-lists.debian.net/pipermail/nut-upsuser/attachments/20200805/62cf1651/attachment.html>
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