May 2012 – quick notes

Get nic kernel module

May 21, 2012June 14, 2021rdircio

if you want to know what kernel module your network interfaces use, you can use “getdriver.ksh”:

#!/bin/bash ifconfig -a | egrep -i 'wlan|eth' | egrep -v 'vbox|mon'| awk '{ print $1 }'|while read i;do echo -n "$i : " readlink /sys/class/net/$i/device/driver| awk -F'/' '{ print $NF }' done

the output is something like this:
root@kraftek:~# /scripts/getdriver
eth0 : atl1c
wlan0 : carl9170
wlan1 : brcmsmac

scan for SAN disks in solaris

May 20, 2012May 20, 2022rdircio

cfgadm -al | grep -i fabric | awk '{ print $1 }' | xargs cfgadm -c configure

devfsadm -C

format < /dev/null | egrep -i 'emc|dgc|hit|netapp'

Scan for disks in fiber channel adapters (hba,qlogic)

May 18, 2012rdircio

ls /sys/class/fc_host/ | while read h;do
 echo $h
 echo 1 > /sys/class/fc_host/$h/issue_lip
 echo "- - -" > /sys/class/scsi_host/$h/scan
 done

Oncall rotation bash script

May 18, 2012rdircio

We have a formula for shifts and a list of people, we need to fill a calendar with them.

These are the iterations for each week “formula.txt”, each row is a week, the first value is the iteration number, the other 4 values in the row are the number for a team member, these iterations are the sequence of combinations so that people are not oncall too frequently:

1 1 2 3 4
2 5 6 7 8
3 4 3 2 1
4 8 7 6 5
5 2 1 4 3
6 6 5 8 7
7 3 4 1 2
8 7 8 5 6

the numbers for the team members are in “roster.txt”:

1 FFlinstone    XXJA01
2 Jdoe    XXJD02
3 OOsbourne    XXHR01
4 AHitchcock    XXDD02
5 ARose    XXAW04
6 EAPoe    XXFP01
7 ACooper    XXBC06
8 BJovi    XXSL01

this is “oncall.ksh”

#!/bin/bash

start_date=20120604
end_date=20120902
formula_current_row=5

formula_rows=8

get_roster()
{
for p in `grep ^$1 formula.txt | awk ‘{ print $2″ “$3” “$4” “$5 }’`;do
echo -n “`grep ^$p roster.txt|awk ‘{ print $3″ ” }’`”
done
echo “”
}

get_weekend_roster()
{
for p in `grep ^$1 formula.txt | awk ‘{ print $2″ “$3” “$2” “$3 }’`;do
echo -n “`grep ^$p roster.txt|awk ‘{ print $3″ ” }’`”
done
echo “”
}

get_oncall()
{
tmpw=0
W=`date -d “$start_date $tmpw day” +”%W”`
for ((tmpw = 0; $(date -d “$start_date $tmpw day” +%s) <= $(date -d “$end_date” +%s); tmpw += 1))
do
P=$W
W=`date -d “$start_date $tmpw day” +”%W”`
if [ “$P” != “$W” ];then
let formula_current_row+=1
if [ $formula_current_row -gt $formula_rows ];then
formula_current_row=1
fi
fi
D=`date -d “$start_date $tmpw day” +”%Y-%m-%d %a%t”`
ISWEEKEND=`echo $D|egrep -i ‘sat|sun’|wc -l`
echo -n “$D ”
if [ $ISWEEKEND -gt 0 ];then
get_weekend_roster $formula_current_row
else
get_roster $formula_current_row
fi
done
}

generate_sql()
{
echo “use OnCall;”
get_oncall | while read l;do
ISWEEKEND=`echo $l|egrep -i ‘sat|sun’|wc -l`
if [ $ISWEEKEND -gt 0 ];then
echo $l | awk ‘{ print “insert into Detail (Date,Shift_C1_Pri,Shift_C1_Sec) values (“”$1″”,””$3″”,””$4″”) on DUPLICATE KEY UPDATE Shift_C1_Pri=””$3″”,Shift_C1_Sec=””$4″”;” }’
else
echo $l | awk ‘{ print “insert into Detail (Date,Shift_A1_Pri,Shift_A1_Sec,Shift_A2_Pri,Shift_A2_Sec) values (“”$1″”,””$3″”,””$4″”,””$5″”,””$6″”) on DUPLICATE KEY UPDATE Shift_A1_Pri=””$3″”,Shift_A1_Sec=””$4″”,Shift_A2_Pri=””$5″”,Shift_A2_Sec=””$6″”;” }’
fi
done
}

get_oncall
generate_sql > from_${start_date}_to_${end_date}.sql

TSM logs

May 18, 2012rdircio

Again another basic tivoli thing… in solaris TSM logs are at:
/var/tivoli

Using dlpiping to test an llt link on a veritas cluster

May 17, 2012rdircio

if an llt link shows down, you can always inject some traffic through the wire and see if you can catch it on the other side.
We first, on one side of the cluster find out the mac address of our interface, then start a “dlpiping server”
process on it.
# /opt/VRTSllt/getmac /dev/ce:0
/dev/ce:0 08:00:10:A7:1E:DC
# /opt/VRTSllt/dlpiping -s /dev/ce:0
Now, on the other side of the link, on the other server, we query for the mac address in the wire.
# /opt/VRTSllt/dlpiping -c /dev/ce:0 08:00:10:A7:1E:DC
08:00:10:A7:1E:DC is alive
if it says that the mac is alive then we have a good link.

linux multipath entries for EMC arrays

May 17, 2012rdircio

add this to your /etc/multipath.conf:

devices {
## Device attributes for EMC SYMMETRIX
device {
vendor "EMC "
product "SYMMETRIX"
path_grouping_policy multibus
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
path_selector "round-robin 0"
features "0"
hardware_handler "0"
failback immediate
}
## Device attributes for EMC CLARiiON
device {
vendor "DGC"
product "*"
path_grouping_policy group_by_prio
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
prio_callout "/sbin/mpath_prio_emc /dev/%n"
hardware_handler "1 emc"
features "1 queue_if_no_path"
no_path_retry 300
path_checker emc_clariion
failback immediate
}
}