Re: [Astlinux-devel] WAN Failover

[David K. <da...@ke...>]

So, on the topic of shutdown....  The problem is that if AstLinux shuts
down, there is no way to bring it back up again remotely... at least not
that I know of.  I have to physically go to the box, pull the power and
plug it back in again (or press a reset switch).  Now if the UPS has not
drained itself completely before power comes back, the power never goes
out, so AstLinux never comes back up.

So I think what I want is to let AstLinux keep running until the UPS dies
completely.  It is ungraceful, but it is unlikely to cause much harm.  A
fsck run at reboot will probably occur.

Reading up on upsmon I think I have two options.  In upsmon.conf I could
change NOTIFYFLAG LOBATT to just syslog and not exec the NOTIFYCMD
script... which is where I suspect the shutdown is triggered (I've not
checked that though).  Or I think I could set MINSUPPLIES to 0 (zero) which
tells upsmon that it is acceptable to have less than one UPS available.

I've not tested either of these yet, but thought I would post here and get
reactions.

David.





On Thu, May 17, 2018 at 11:01 AM, Michael Keuter <li...@mk...>
wrote:

>
> > Am 17.05.2018 um 16:50 schrieb Michael Keuter <li...@mk...>:
> >
> >>
> >> Am 17.05.2018 um 16:31 schrieb Michael Keuter <li...@mk...>:
> >>
> >>
> >>> Am 17.05.2018 um 16:12 schrieb David Kerr <da...@ke...>:
> >>>
> >>> Starting a thread among developers on this topic to record some
> observations.  Now on day two of no power or internet and having got WAN
> failover working yesterday I have some observations...
> >>
> >> Hopefully the power gets back soon …
> >>
> >>> Status page still shows my eth0 IPv4 address, which is 192.168.100.10
> issued by my cable modem as external network down.
> >>>
> >>> WAN failover status shows 192.168.100.1 as (bogus) primary gateway and
> 172.20.10.1 as accurate.  But what is needed is external IP address.
> >>>
> >>> My ddclient uses eth0 as the external IPv4 address.  So my dynamic DNS
> updates are all failing/bogus.  Either I change to use an external site to
> determine my IP, or I do something in WAN failover script to change what
> ddclient does.  Any thoughts as to best approach?  I want something
> automatic that will work whether using primary or failover.
> >>
> >> Some of that stuff can be automated with the optional Action script:
> >> https://doc.astlinux.org/userdoc:tt_wan_failover#action_script_optional
> >>
> >>> I turn off my generator overnight and run network from a large UPS.
> According to syslog Astlinux decided to shutdown at 6am when upsmon
> determined low battery.  I think it was at 20% left, but at that level I
> still have 90-120 minutes of runtime left.  Is there a setting to change
> when Astlinux does the shutdown?
> >>
> >> I guess in "/etc/ups/upsmon.conf" (but no idea which is the right
> parameter). You can create your own file in "/mnt/kd/".
> >
> > I think I was wrong: https://networkupstools.org/docs/man/ups.conf.html
> > Pay attention to the "ignorelb", "default.<variable>" and
> "override.<variable>" parameters.
> >
> > Checkout this command in CLI to get the values:
> >
> > ----
> > upsc ups@localhost
> > battery.charge: 100
> > battery.charge.low: 10
> > battery.charge.warning: 50
> > ...
> > ...
> > ----
>
> Update: There's even more :-):
>
> upsrw ups@localhost
> [battery.charge.low]
> Remaining battery level when UPS switches to LB (percent)
> Type: STRING
> Maximum length: 10
> Value: 10
>
> You can also set variables with "upsrw", e.g. in "/mnt/kd/rc.elocal". You
> need the username and password from "/etc/ups/upsd.users".
>
> Michael
>
> http://www.mksolutions.info
>
>
>
>
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