I have fixed the problem by null the appstatus when status is noping for
nodestat -u. You can see the defect and follow the instruction there to
download and replace the nodestat.pm file.
https://sourceforge.net/p/xcat/bugs/4652/
Ling
Ling Gao
Poughkeepsie Unix Development Lab
IBM Systems and Technology Group
Internal: T/L 293-5692
External: [email protected], 845-433-5692
"I never worry about the future. It comes soon enough." --- Albert
Einstein
From: Daniel Letai <[email protected]>
To: xCAT Users Mailing list <[email protected]>
Date: 04/21/2015 12:44 PM
Subject: Re: [xcat-user] nodestat -u differs from nodels
nodelist.appstatus
Yes, always the same 4 nodes.
-f doesn't produce anything, just returns immediately, possibly due to
the fact fping is not installed.
I have performed the following sanity check:
# rpower n01 off
# nodestat -up n01
noping(off)
# nodels n01 nodelist.appstatus nodelist.status
n01: nodelist.appstatus:
xend=down,sshd=up,rdp=down,https=up,pbs=down,msrpc=down
n01: nodelist.status: noping(off)
# tabch node=n01 nodelist.appstatus=""
# nodels n01 nodelist.appstatus nodelist.status
n01: nodelist.appstatus:
n01: nodelist.status: noping(off)
# nodestat -up n01
noping(off)
# nodels n01 nodelist.appstatus nodelist.status
n01: nodelist.appstatus:
n01: nodelist.status: noping(off)
# rpower n01 on
# nodestat -up n01
sshd,https
# nodels n01 nodelist.appstatus nodelist.status
n01: nodelist.appstatus:
xend=down,sshd=up,rdp=down,https=up,pbs=down,msrpc=down
n01: nodelist.status: ping
So it seems when a node is not responding (noping), the appstatus
field doesn't update. I assume some kind of code optimization (why
bother checking appstatus for a noping node) but it does present a
slightly more complex logic to my monitoring code,
How hard would it be to modify the code to update the appstatus
regardless of status=noping (or even automatically set everything to
'down')?
On Tue, Apr 21, 2015 at 5:34 PM, Ling Gao <[email protected]> wrote:
> Do you consistently get the sshd=down for the same 4 nodes and their
status
> is "sshd"? Can you try "nodestat -up -f compute" and see if you get the
> same result? (Can you clear the appstatus field for each try and compare
the
> result.?
>
> Ling
>
> Ling Gao
> Poughkeepsie Unix Development Lab
> IBM Systems and Technology Group
> Internal: T/L 293-5692
> External: [email protected], 845-433-5692
>
> "I never worry about the future. It comes soon enough." --- Albert
Einstein
>
>
>
> From: Daniel Letai <[email protected]>
> To: xCAT Users Mailing list <[email protected]>
> Date: 04/21/2015 09:59 AM
> Subject: [xcat-user] nodestat -u differs from nodels
> nodelist.appstatus
> ________________________________
>
>
>
> Hi,
>
> I'm trying to implement some kind of basic liveness test for nodes in
> the cluster based on results from nodestat -p:
> 1. noping(off) - powered off node
> 2. noping(on) - zombie node
> 3. noping - dead node (both os and ipmi non-responsive)
> 4. sshd - live node
> 5. all else (installing prep etc.)
>
> I have put "nodestat -up" into cron, and nodelist table gets updated
> as expected, however when trying to get the same results I notice some
> big differences.
> For example:
> # nodestat -up compute | grep -v sshd | wc -l
> 48
> # nodels compute nodelist.appstatus=~"sshd=down" | wc -l
> 4
>
> I have confirmed all 4 nodes are a subset of the 48 nodes from nodestat.
> The status column does provide the ping/noping(on|off) info, but for
> most nodes with status noping the appstatus field shows "sshd=up"
>
> Am I missing something?
>
> The xCAT version is 2.8.3
> An upgrade to 2.9.x is not practical at this time (it is scheduled),
> but in any event I hadn't seen anything in the release notes that
> might be relevant.
>
>
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