SVC – BAFM

SVC: Find WWPN

November 15, 2010June 21, 2013 Christian Leave a comment

Today we had (once again) hardware troubles. We ended up replacing a lot of things, but in the end it was a) the HBA and b) apparently some memory DIMMs. Now, that isn’t SVC related. However, we built in another HBA (from our Standby hardware), which apparently already had been assigned to a host.

Now, since you can’t search for a WWPN (at least not that I know of), I ended up writing a little script (yup, AGAIN) in order to do that for me!

#!/bin/bash

svc_cluster_ip=10.0.0.10
svc_priv_dsa=~/.ssh/id_dsa

if [ ! -f $svc_priv_dsa ] ; then
  echo &quot; ${0##*/} is missing the SSH DSA private key&quot;
  echo &quot;                         needed to access the SAN Volume controller.&quot;
  echo &quot; Please specify the correct path!&quot;
fi

if [ -z $1 ] ; then
  echo
  echo &quot; ${0##*/} [ WWPN ]&quot;
  echo
  echo &quot;  WWPN    - WWPN, or part of WWPN that is being searched.&quot;
  echo &quot;            Should be entered in continous format (ie. no dash (-) or colon (:))!&quot;
  echo
  exit 1;
fi

WWPN=$1

list_wwpn_by_host() {
  local _host=$1

  if [ ! -z $_host ] ; then
    ssh -i $svc_priv_dsa admin@$svc_cluster_ip svcinfo lshost 
      -delim : $_host | grep ^WWPN | sed &quot;s,WWPN:,,&quot;
  fi
}

#set -x

HOST_LIST=&quot;$( ssh -i $svc_priv_dsa admin@$svc_cluster_ip svcinfo lshost -delim : -nohdr | cut -d: -f2 )&quot;

for HOST in $HOST_LIST; do
  echo -n &quot;$HOST: &quot;
  echo `list_wwpn_by_host $HOST`
done | grep $WWPN

#set +x

#!/bin/bash

svc_cluster_ip=10.0.0.10

svc_priv_dsa=~/.ssh/id_dsa

if [ ! -f $svc_priv_dsa ] ; then

echo " ${0##*/} is missing the SSH DSA private key"

echo " needed to access the SAN Volume controller."

echo " Please specify the correct path!"

if [ -z $1 ] ; then

echo

echo " ${0##*/} [ WWPN ]"

echo

echo " WWPN - WWPN, or part of WWPN that is being searched."

echo " Should be entered in continous format (ie. no dash (-) or colon (:))!"

echo

exit 1;

WWPN=$1

list_wwpn_by_host() {

local _host=$1

if [ ! -z $_host ] ; then

ssh -i $svc_priv_dsa admin@$svc_cluster_ip svcinfo lshost

-delim : $_host | grep ^WWPN | sed "s,WWPN:,,"

}

#set -x

HOST_LIST="$( ssh -i $svc_priv_dsa admin@$svc_cluster_ip svcinfo lshost -delim : -nohdr | cut -d: -f2 )"

for HOST in $HOST_LIST; do

echo -n "$HOST: "

echo `list_wwpn_by_host $HOST`

done | grep $WWPN

#set +x

SVC: Migrate VDisks off a MDisk Group onto another

October 29, 2009June 21, 2013 Christian Leave a comment

Out of necessity, another SVC shell script was just born. If you ever need to migrate a whole MDisk group onto another, you quickly discover the limited application of the SVC GUI. Now, you could query the VDisks using your original MDisk Group and then copy and paste the VDisk’s name (or the VDisk ID) into a command line and simply reuse that svctask migratevdisk command over and over.

Luckily IBM blessed the SVC with an SSH interface. So again, we can write a (kinda) simple shell script which may look like this:

#!/bin/bash

svc_cluster_ip=10.0.0.10
svc_priv_dsa=~/.ssh/id_dsa

if [ -z $2 ] ; then
  echo
  echo &quot; ${0##*/} [ original_mdiskgrp | target_mdiskgrp | (threads) ]&quot;
  echo
  echo &quot;  mdiskgrp_old   - The MDisk Group which currently contains&quot;
  echo &quot;                   the VDisks.&quot;
  echo &quot;  mdiskgrp_new   - The MDisk Group you wish to migrate the&quot;
  echo &quot;                   VDisks migrated to.&quot;
  echo &quot;  threads        - Number of processes to use for the migration.&quot;
  echo &quot;                   By default, `migratevdisk` uses 2.&quot;
  echo
  exit 1;
fi

if [ ! -f $svc_priv_dsa ] ; then
  echo &quot; ${0##*/} is missing the SSH DSA private key&quot;
  echo &quot; needed to access the SAN Volume controller.&quot;
  echo &quot; Please specify the correct path!&quot;
fi

mdiskgrp_old=$1
mdiskgrp_new=$2
threads=$3
: ${threads:=2}

check_running_migrations() {
  # Get the number of already running migrations. The SVC is currently
  # able to run 32 migrations at the same time.
  running=&quot;$( ssh -i $svc_priv_dsa admin@$svc_cluster_ip svcinfo lsmigrate 
    | grep progress | wc -l )&quot;

  if [ $running -ge 32 ] ; then
    echo
    echo &quot; The SVC is already running the maximum amount of migrations&quot;
    echo &quot; at this time. Please retry, once the running migrations&quot;
	echo &quot; finished.&quot;
    echo
    exit 1
  fi
}

check_running_migrations

if [ &quot;$( ssh -i $svc_priv_dsa admin@$svc_cluster_ip svcinfo lsmdiskgrp 
  $mdiskgrp_new &amp;&gt;/dev/null ; echo $? )&quot; = 1 ] ; then
    echo &quot;${0##*/}: The MDisk Group ($mdiskgrp_new) doesn&#039;t existent!&quot;
    exit 1
fi

echo &quot;Legend:&quot;
echo
echo -e &quot;  33[0;32m*33[0m VDisk migration started successfully&quot;
echo -e &quot;  33[0;36m*33[0m VDisk migration skipped (already running?)&quot;
echo -e &quot;  33[0;31m*33[0m VDisk migration failed to start (wrong name?)&quot;

echo

echo &quot;Starting the tasks to migrate VDisks of $mdiskgrp_old to $mdiskgrp_new&quot;
for vdisk in $( ssh -i $svc_priv_dsa admin@$svc_cluster_ip svcinfo 
  lsvdisk -nohdr -delim : -filtervalue mdisk_grp_name=$mdiskgrp_old ); do
    vdisk_id=&quot;$( echo $vdisk | cut -d: -f1 )&quot;
    vdisk_name=&quot;$( echo $vdisk | cut -d: -f2 )&quot;

    # Check if there&#039;s already a migration running for this vdisk
    if [ &quot;$( ssh -i $svc_priv_dsa admin@$svc_cluster_ip svcinfo lsmigrate 
	  | grep &quot;migrate_source_vdisk_index $vdisk_id$&quot; )&quot; != &quot;&quot; ] ; then
        echo -e &quot;  33[0;36m*33[0m VDisk $vdisk_name ($vdisk_id)&quot;
        continue
    fi

    check_running_migrations

    ssh -i $svc_priv_dsa admin@$svc_cluster_ip svctask migratevdisk 
      -mdiskgrp $mdiskgrp_new -threads $threads 
	  -vdisk $vdisk_name &amp;&gt;/dev/null
    response=$?

    [ $response -eq 0 ] &amp;&amp; 
      echo -e &quot;  33[0;32m*33[0m VDisk $vdisk_name ($vdisk_id)&quot; 
      || echo -e &quot;  33[0;31m*33[0m VDisk $vdisk_name ($vdisk_id)&quot;
    running=$((running+1))
done

echo

#!/bin/bash

svc_cluster_ip=10.0.0.10

svc_priv_dsa=~/.ssh/id_dsa

if [ -z $2 ] ; then

echo

echo " ${0##*/} [ original_mdiskgrp | target_mdiskgrp | (threads) ]"

echo

echo " mdiskgrp_old - The MDisk Group which currently contains"

echo " the VDisks."

echo " mdiskgrp_new - The MDisk Group you wish to migrate the"

echo " VDisks migrated to."

echo " threads - Number of processes to use for the migration."

echo " By default, `migratevdisk` uses 2."

echo

exit 1;

if [ ! -f $svc_priv_dsa ] ; then

echo " ${0##*/} is missing the SSH DSA private key"

echo " needed to access the SAN Volume controller."

echo " Please specify the correct path!"

mdiskgrp_old=$1

mdiskgrp_new=$2

threads=$3

: ${threads:=2}

check_running_migrations() {

# Get the number of already running migrations. The SVC is currently

# able to run 32 migrations at the same time.

running="$( ssh -i $svc_priv_dsa admin@$svc_cluster_ip svcinfo lsmigrate

| grep progress | wc -l )"

if [ $running -ge 32 ] ; then

echo

echo " The SVC is already running the maximum amount of migrations"

echo " at this time. Please retry, once the running migrations"

echo " finished."

echo

exit 1

}

check_running_migrations

if [ "$( ssh -i $svc_priv_dsa admin@$svc_cluster_ip svcinfo lsmdiskgrp

$mdiskgrp_new &>/dev/null ; echo $? )" = 1 ] ; then

echo "${0##*/}: The MDisk Group ($mdiskgrp_new) doesn't existent!"

exit 1

echo "Legend:"

echo

echo -e " 33[0;32m*33[0m VDisk migration started successfully"

echo -e " 33[0;36m*33[0m VDisk migration skipped (already running?)"

echo -e " 33[0;31m*33[0m VDisk migration failed to start (wrong name?)"

echo

echo "Starting the tasks to migrate VDisks of $mdiskgrp_old to $mdiskgrp_new"

for vdisk in $( ssh -i $svc_priv_dsa admin@$svc_cluster_ip svcinfo

lsvdisk -nohdr -delim : -filtervalue mdisk_grp_name=$mdiskgrp_old ); do

vdisk_id="$( echo $vdisk | cut -d: -f1 )"

vdisk_name="$( echo $vdisk | cut -d: -f2 )"

# Check if there's already a migration running for this vdisk

if [ "$( ssh -i $svc_priv_dsa admin@$svc_cluster_ip svcinfo lsmigrate

| grep "migrate_source_vdisk_index $vdisk_id$" )" != "" ] ; then

echo -e " 33[0;36m*33[0m VDisk $vdisk_name ($vdisk_id)"

continue

check_running_migrations

ssh -i $svc_priv_dsa admin@$svc_cluster_ip svctask migratevdisk

-mdiskgrp $mdiskgrp_new -threads $threads

-vdisk $vdisk_name &>/dev/null

response=$?

[ $response -eq 0 ] &&

echo -e " 33[0;32m*33[0m VDisk $vdisk_name ($vdisk_id)"

|| echo -e " 33[0;31m*33[0m VDisk $vdisk_name ($vdisk_id)"

running=$((running+1))

done

echo

And the execution would look like this:

svc-mgmt ~ # svctask_migratemdiskgrp DS3400_146G_R1 DS4700_500G_R6 4

 The SVC is already running the maximum amount of migrations at this time.
 Please retry, once the running migrations finished.

svc-mgmt ~ # svctask_migratemdiskgrp DS3400_146G_R1 DS4700_500G_R6 4

The SVC is already running the maximum amount of migrations at this time.

Please retry, once the running migrations finished.

Or maybe:

svc-mgmt ~ # svctask_migratemdiskgrp DS3400_146G_R1 DS4700_500G_R6 4
Legend:

  * VDisk migration started successfully
  * VDisk migration skipped (already running?)
  * VDisk migration failed to start (wrong name?)

Starting the tasks to migrate VDisks from DS3400_146G_R1 to DS4700_500G_R6
  * VDisk V_ATLAS_C_01 (25)
  * VDisk V_AETHER_D_01 (13)
  * VDisk V_DEIMOS_ROOT

svc-mgmt ~ # svctask_migratemdiskgrp DS3400_146G_R1 DS4700_500G_R6 4

Legend:

* VDisk migration started successfully

* VDisk migration skipped (already running?)

* VDisk migration failed to start (wrong name?)

Starting the tasks to migrate VDisks from DS3400_146G_R1 to DS4700_500G_R6

* VDisk V_ATLAS_C_01 (25)

* VDisk V_AETHER_D_01 (13)

* VDisk V_DEIMOS_ROOT

IBM SVC: Copy VDisk Host-Mapping from one host to another

October 11, 2009August 8, 2014 Christian 1 Comment

As I wrote a few days ago, I started a new job. One of my first (voluntary) tasks was writing a shell script which would copy a VDisk Host-Mapping from a given host to another. This is useful, if you do have a lot of ESX servers for example and a few roaming ones.

Now, if say, you need to do some ESX-Updates and you would like to add the roaming one to a given farm, you would be in a dark an deary place. You would be required to either click through the GUI a dozen times (in my case, it might have needed ~200 clicks) or type svcinfo lshostvdiskmap <examplehosthere> and svctask mkhostvdiskmap <newhosthere> -force (these are incomplete command references) a few times.

Both methods ain’t optimal nor fast. Since the SVCTools (Perl, jikes) don’t really came into consideration, and the SVC SSH interface really doesn’t provide any other method to do a simple cut -d: -f3 (as a hint: if anyone knows a nice method to emulate cut with bash patterns — yeah, I ain’t kidding — please drop me a note!), I ended up writing a simple shell script which is gonna do all the tasks from any Linux system (in possession of the SSH DSA private keys for the SVC of course).

The script looks like this:

#!/bin/bash

svc_cluster_ip=10.0.0.10
svc_priv_dsa=~/.ssh/id_dsa_svc

if [ -n $2 ] ; then
  echo " copyvdiskhostmap.sh [ host_to | host_from ]"
  echo
  echo "  host_to    - Target host, for which we will create the VDisk map."
  echo "  host_from  - Source host, from which the VDisk map will be copied."
  echo
  exit 1;
fi

if [ ! -f $svc_priv_dsa ] ; then
  echo " copyvdiskhostmap.sh is missing the SSH DSA private key needed"
  echo "                     to access the SAN Volume controller."
  echo " Please specify the correct path!"
fi

host_to=$1
host_from=$2

for mapping in $( ssh -i $svc_priv_dsa admin@$svc_cluster_ip svcinfo 
  lshostvdiskmap -nohdr -delim : $host_from ); do
  vdisk_scsi_id="$( echo $mapping | cut -d: -f3 )"
  vdisk_name="$( echo $mapping | cut -d: -f5 )"
  
  ssh -i $svc_priv_dsa admin@$svc_cluster_ip svcinfo lshost $host_to || 
    echo "Failed, since the target host doesn't existent!" &amp;&amp; break
  ssh -i $svc_priv_dsa admin@$svc_cluster_ip svctask mkvdiskhostmap -force 
    -host $host_to -scsi $vdisk_scsi_id $vdisk_name
done

#!/bin/bash

svc_cluster_ip=10.0.0.10

svc_priv_dsa=~/.ssh/id_dsa_svc

if [ -n $2 ] ; then

echo " copyvdiskhostmap.sh [ host_to | host_from ]"

echo

echo " host_to - Target host, for which we will create the VDisk map."

echo " host_from - Source host, from which the VDisk map will be copied."

echo

exit 1;

if [ ! -f $svc_priv_dsa ] ; then

echo " copyvdiskhostmap.sh is missing the SSH DSA private key needed"

echo " to access the SAN Volume controller."

echo " Please specify the correct path!"

host_to=$1

host_from=$2

for mapping in $( ssh -i $svc_priv_dsa admin@$svc_cluster_ip svcinfo

lshostvdiskmap -nohdr -delim : $host_from ); do

vdisk_scsi_id="$( echo $mapping | cut -d: -f3 )"

vdisk_name="$( echo $mapping | cut -d: -f5 )"

ssh -i $svc_priv_dsa admin@$svc_cluster_ip svcinfo lshost $host_to ||

echo "Failed, since the target host doesn't existent!" && break

ssh -i $svc_priv_dsa admin@$svc_cluster_ip svctask mkvdiskhostmap -force

-host $host_to -scsi $vdisk_scsi_id $vdisk_name

done

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