#2993 PMR29175 /proc missing on diskless nodes - HASN

2.7.4
closed
Norm Nott
PMR (70)
5
2012-10-19
2012-07-23
Lissa Valletta
No

ECM Service Ping
From: Ping Li/Poughkeepsie/IBM
To: Lissa Valletta/Poughkeepsie/IBM@IBMUS
Cc: Norman Nott/Poughkeepsie/IBM@IBMUS, Linda Mellor/Poughkeepsie/IBM@IBMUS
Date: 07/20/2012 02:27 PM
Subject: PMR29175 /proc missing on diskless sys

Lissa,

ECMWF Alex Wood report /proc missing on all diskless node.
I found old mail for this [ xcat-Bugs-3397226 ] /Proc filesystem is not created on AIX diskless node, it was fixed on 2.6.7, but I could not find 3397226 bugs.
Customer saw it again on 2.7.2 ?

Problem Details
.
Product or Service: eXtreme Cloud Administrative Toolkit on AIX 2.7.2
Component ID: 5724V6301
.
Operating System: AIX
.
Problem title
C2T: Missing /proc filesystem
.
Problem description
System Model: 9125-F2C
Operating System: AIX V7.1
.
2xP7-775 HFI Topology: 8D_SDSN
HMC: V7R7.3.0 SP4 (Build lvl 20120514.1)
AIX: 7100-01-03-1207, xCAT: 2.7.2, GPFS 3.4.0.13, LL 5.1.0.6+
PPE: 1.1.0.6+, xlf: v13.1.0.5

A user recently reported they were unable to run procstack against a
process, got error:

procstack 3932398

fopen: No such file or directory
procstack: 3932398 is not a process

Tracked this down to node not having /proc filesystem mounted. Further
investigation reavealed that all our diskless nodes are missing the
/proc entry in /etc/filesystems, however if I check the image on the
EMS it is there:

xdsh -i ec_c_p5_v1 "grep -p proc /etc/filesystems"

ec_c_p5_v1: /proc:
ec_c_p5_v1: dev = /proc
ec_c_p5_v1: vol = "/proc"
ec_c_p5_v1: mount = true
ec_c_p5_v1: check = false
ec_c_p5_v1: free = false
ec_c_p5_v1: vfs = procfs

Issue exists on both clusters that have been upgraded to HPC SP5.1
(xCAT 2.7.2) in both storage and compute images. Also checked with HPC
test team, they see the same issue.

Discussion

  • Lissa Valletta
    Lissa Valletta
    2012-07-23

    Reassigning to the develoer that fixed the original defect .

     
  • Norm Nott
    Norm Nott
    2012-07-23

    The support for the /proc filesystem is contained in the mkdsklsnode command. The command updates the /etc/filesystems file that will be used when the node is booted. Unfortunately this block of code was missed when adding the support for HASN.

    I'll add it to the HASN flow.

     
  • Lissa Valletta
    Lissa Valletta
    2012-07-24

    Norm is working on an efix

     
  • Norm Nott
    Norm Nott
    2012-07-24

    Added /proc setup to hasn flow in mkdsklsnode

    File: aixinstall.pm
    2.7.4 - rev 13342.
    2.8 - rev 13343.

    The ifix version of the file for 2.7.2 is attached below.

    Note: This file includes the changes for ifix SF3526650!

     
  • Norm Nott
    Norm Nott
    2012-07-24

    This is the gzip'd source file - not the ifix package.

     
    Attachments
  • Norm Nott
    Norm Nott
    2012-07-24

    tar file containing SF3547581.120724.epkg.Z and README

     
    Attachments
  • Lissa Valletta
    Lissa Valletta
    2012-10-19

    • status: pending --> closed
     
  • Lissa Valletta
    Lissa Valletta
    2012-10-19

    Checked PMR database it is closed