IP Networking

Hi gurus, I am trying to understand the enviroment which we are using. The fact that I am asking is that this is production enviroment and I cannot change anything to experiment. Following servers are somehow related to each other, please help me figure out if my conclusions are correct.


- sphinga IS NIS MASTER FOR pharaon
- pharaon IS NIS SLAVE AND ALSO NIS CLIENT TO ITSELF:

Code:

SU-pharaon:/root# ypwhich -m | head -1
passwd.byname sphinga
SU-pharaon:/root# ypwhich
pharaon

1)
- pharaon AUTOMOUNTER ALSO READS NIS MAP CALLED auto.master PROVIDED BY NIS MASTER/SLAVE (sphinga)
- WHERE ARE ENTRIES CONTAINED IN auto.master NIS MAP MOUNTED?
- IT IS MATTER OF CONTENT OF NIS MAP ITSELF OR SOME LOCAL AUTOMOUNTER CONFIGURATION ?

Code:

SU-pharaon:/root# cat /etc/auto_master
+auto.master
/net -hosts -nosuid,soft

- CONTENT OF auto.master NIS TABLE OBTAINED FROM MASTER/SLAVE (sphinga):

Code:

SU-pharaon:/root# ypcat auto.master
/etc/auto.direct        -rw,soft
-hosts                  -ro,soft,nosuid
auto.indir.users        -rw,soft,nosuid
auto.indir.mo2o         -rw,soft

2)
- HOME DIRECTORY OF whally /u/whally IS MOUNTED FROM lecch02 WHICH IS SOME EXTERNAL STOREGE TYPE (PLEASE SEE BELLOW)
- MOUNT POINT IS DETERMINED BY MAP PROVIDED FROM NIS MASTER ? (PLEASE SEE BELLOW)

Code:

SU-pharaon:/# cd ~whally
SU-pharaon:/u/whally# pwd
/u/whally
SU-pharaon:/u/whally# mount | grep `pwd`
/u/whally on lecch02:/root_vdm_2/user005/home/whally nosuid,soft,nodevs,rsize=32768,wsize=32768,NFSv3 on Thu Aug  9 13:48:10 2012

3)
- DIRECT MAP ON MASTER (sphinga) WILL BE PROPAGATED THROUGHT NIS TO pharaon
- OR MORE CLEARLY, THE DIRECT MAP IS PROPAGATED AFTER THE INDIRECT MAP RECORDS ARE "EXPANDED"
- IF THERE WAS NO +auto.master ENTRY IN CLIENTS /etc/auto_master THE EXPORTING THIS FILE ON NIS MASTER WOULD HAVE ANY SENSE ?
- FOLLOWING LINES ARE NEARLY SIMMILAR TO ypcat auto.master ON NIS CLIENT:

Code:

SU-sphinga:/var/yp/etc# cat auto.master
/-      /etc/auto.direct        -rw,soft
/net    -hosts                  -ro,soft,nosuid
/u      auto.indir.users        -rw,soft,nosuid
/mo2o   auto.indir.mo2o         -rw,soft

4)
- INDIRECT MAP (THOSE THAT WILL BE "EXPANDED") ON NIS MASTER
- SO WHATEVER IS EXPORTED ON "lecch02:/root_vdm_2/user005/home/whally" IT WILL BE MOUNTED UNDER /u/whally
- BECAUSE OF "/u auto.indir.users -rw,soft,nosuid" ENTRY IN DIRECT MAP

Code:

SU-sphinga:/var/yp/etc# cat auto.indir.users | grep whally
whally        lecch02:/root_vdm_2/user005/home/whally

5)
- WHERE DOES SOLARIS HAVE NIS CONFIG FILE (LINUX HAS /etc/yp.conf), WHERE IS DECLARED WHICH FILES WILL BE NIS MAPS ETC. ?
- HOW TO DETERMINE WHICH NIS VERSION IS ACTUALLY RUNNING ?
- HOW TO FIND MASTERs/SLAVEs CLIENTS ?
- WHAT IF NIS MASTER MAP CONTAINS "/u" AS A MOUNT POINT DIRECTORY BUT CLIENT AUTOMOUNTER WHICH READS THIS MAP DO NOT HAVE "/u" DIRECTORY CREATED, WILL IT BE CREATED ON CLIENT AUTOMATICALLY ?

################################
#HERE IS ANOTHER EXAMPLE OF ENVIROMENT: #
################################


sphinga IS NIS MASTER FOR hunland:

Code:

SU-hunland:/root# ypwhich -m | head -1
passwd.byuid sphinga

- DIRECT MAP FILE ON hunland
- +auto_master NIS MAP IS READEN FROM NIS:

Code:

SU-hunland:/root# cat /etc/auto_master
+auto_master
/net            -hosts          -nosuid,nobrowse
/home           auto_home       -nobrowse
/lecch          lecch_home

6)
- lecch IS PROBABLY SOME TYPE OF STORAGE (I DONT HAVE ACCESS ON IT)
- THIS IS WEIRD SYNTAX WHICH I DID NOT FIND IN MAN PAGES, HOW ARE THOSE DIRECTORIES MOUNTING ?
- WHAT I HAVE FIGURED IS THAT THET ARE ALL MOUNTED UNDER /lecch (BECAUSE OF "/lecch lecch_home" ENTRY IN DIRECT MAP) BUT WHAT A WIERD SYNTAX ?
- IS THE BACKSLASH IN CONFIG FILE ONLY THE ESCAPING OF NEW LINE CHARACTER ?

Code:

SU-hunland:/root# cat /etc/lecch_home
01 \
        /user001        lecch01:/root_vdm_1/user001 \
        /user002        lecch01:/root_vdm_1/user002 \
        /user003        lecch01:/root_vdm_1/user003
02 \
        /user004        lecch02:/root_vdm_2/user004 \
        /user005        lecch02:/root_vdm_2/user005 \
        /user006        lecch02:/root_vdm_2/user006 \
        /tml3cel        tml3cel01:/home
03 \
        /user007        lecch03:/root_vdm_3/user007 \
        /user008        lecch03:/root_vdm_3/user008 \
        /user009        lecch03:/fs_unix009/user009 \
        /FS_ISG_Users   lecch03:/FS_ISG_Users

7)
- CONTENT OF DIRECT MAP FROM NIS (WHY auto.master NOT auto_master ?) :

Code:

SU-hunland:/root# ypcat auto_master
no such map in servers domain
SU-hunland:/root# ypcat auto.master
auto.indir.mo2o         -rw,soft
-hosts                  -ro,soft,nosuid
auto.indir.users        -rw,soft,nosuid
/etc/auto.direct        -rw,soft

- CONTENT OF INDIRECT MAP FROM NIS:

Code:

SU-hunland:/root# ypcat auto.indir.users | egrep 'koltas|sozdar'
lecch02:/root_vdm_2/user005/home:koltas
lecch03:/root_vdm_3/user007/home:sozdar

- AUTO MOUNTER FUNCTION IN PRACTICE:

Code:

SU-hunland:/root# mount | grep koltas
SU-hunland:/root# cd ~koltas
SU-hunland:/u/koltas# mount | grep koltas
/u/koltas on lecch02:/root_vdm_2/user005/home/koltas remote/read/write/nosetuid/nodevices/rstchown/soft/xattr/dev=53ae5b9 on Thu Aug  9 16:23:14 2012

8)
- IS SAFE TO UMOUNT /u/koltas MANUALY THROUGHT umount COMMAND EVEN IF IT WAS PREVIOUS MOUNTED VIA AUTOMOUTER ?
- /u/* ENTRIES ARE ALSO MOUNTED IN /lecch DIRECTORY OR POSSIBLY BETTER THE /lecch ENTRIES ARE ALSO MOUNTED UNDER /u ?
- HOW TO FIND CORRESPONDING /lecch/* DIRECTORY TO /u/koltas DIRECTORY ? (PLEASE SEE BELLOW)


9)
- NOW WE ARE EXPERIENCING PROBLEMS WITH SOME /lecch SUBDIRECTORIES BUT IT USED TO WORK, THIS COMMAND SIMPLY HANGS - WHAT COULD BE POSSIBLE PROBLEM ?

Code:

SU-hunland:/u/koltas# ls -l /lecch/02/user005/
^C

- BUT THIS (FOR ANOTHER SUB DIRECTORY UNDER /lecch) RUN AS EXPECTED
- SAME QUESTION AS ABOVE: WHY ARE ALL USERS DURING SWITCHING TO THEIR HOME DIRECTORIES MOUNTED UNDER "/u" WHERE IS THIS SPECIFIED ?

Code:

SU-hunland:/root# cd /lecch/03/user007/home/sozdar
SU-hunland:/lecch/03/user007/home/sozdar# mount | grep sozdar
SU-hunland:/lecch/03/user007/home/sozdar# cd ~sozdar
SU-hunland:/u/sozdar# mount | grep sozdar
/u/sozdar on lecch03:/root_vdm_3/user007/home/sozdar remote/read/write/nosetuid/nodevices/rstchown/soft/xattr/dev=53ae5c7 on Thu Aug  9 16:33:49 2012

Many thanks for all your corrections

---------- Post updated 08-13-12 at 12:34 AM ---------- Previous update was 08-12-12 at 01:09 AM ----------

Nobody