VMworld 2009

Just got back from VMworld 2009 in San Francisco. Conference was great - good sessions, great labs (although I hear they had some trouble on Monday) and good people. Overall a great value, I'll be going again next year.

Max.

VMware storage migration script

We're moving from SAN attached to NFS storage on our vmware environment, (and vSphere4 isn't out yet) so I wrote a script that will migrate VMs from current location to the new one (I had to hard-code the new location in, since when using sed the path with vmfs/ messed up sed due to the s/).

Warning: if you have VMs with 2 disks with the same name (if they were created in different directories) then this won't work. It will work for up to 3 disks, and should be easy to make support more.

#!/bin/bash
HOMEDIR=/vmfs/volumes/d42ddbc9-93beeb73
for VMNAME in `vmware-cmd -l | awk -F/ '{print $5}'`
do
mkdir $HOMEDIR/$VMNAME/
VMPATH=`vmware-cmd -l | grep $VMNAME | awk -F. '{print $1}'`
for VMDK in `grep scsi0:.*fileName $VMPATH.vmx | awk -F\" '{print $2}'`
do
vmkfstools -i $VMPATH.vmdk $HOMEDIR/$VMNAME/$VMDK -d 'thin' -a lsilogic
done

vmware-cmd -s unregister $VMPATH.vmx

sleep 2

cp $VMPATH.vmx $HOMEDIR/$VMNAME/$VMNAME.vmx.new

sed "s/scsi0:0.fileName.*/scsi0:0.fileName = \/vmfs\/volumes\/d42ddbc9-93beeb73\/${VMNAME}\/${VMNAME}.vmdk/" $HOMEDIR/$VMNAME/$VMNAME.vmx.new > $HOMEDIR/$VMNAME/$VMNAME.vmx.new2
sed "s/scsi0:1.fileName.*/scsi0:1.fileName = \/vmfs\/volumes\/d42ddbc9-93beeb73\/${VMNAME}\/${VMNAME}_1.vmdk/" $HOMEDIR/$VMNAME/$VMNAME.vmx.new2 > $HOMEDIR/$VMNAME/$VMNAME.vmx.new3
sed "s/scsi0:2.fileName.*/scsi0:2.fileName = \/vmfs\/volumes\/d42ddbc9-93beeb73\/${VMNAME}\/${VMNAME}_2.vmdk/" $HOMEDIR/$VMNAME/$VMNAME.vmx.new3 > $HOMEDIR/$VMNAME/$VMNAME.vmx

rm -rf $HOMEDIR/$VMNAME/*.new*
chmod +x $HOMEDIR/$VMNAME/$VMNAME.vmx
vmware-cmd -s register $HOMEDIR/$VMNAME/$VMNAME.vmx
done

HP Onboard Administrator LDAP authentication search context issue

This was an annoying problem today, so I'm posting it in case it helps anyone else.

I was trying to get the OA for our blades connecting to our AD. I setup the LDAP like the manual said, but no joy. Some research on the HP forums said that if the user you want to connect as is in a different OU than the group they're a member of, both need to be configured as search contexts in the OA config. My config page looks like this:

Directory Server Address: dc.domain.com

Directory Server SSL Port: 636

Search Context 1: OU=AdminGroups,OU=Admin,DC=domain,DC=com

Search Context 2: OU=Admins,OU=Admin,DC=domain,DC=com

And then the group setup is like so:

CN=ILO-Admin,OU=AdminGroups,OU=Admin,DC=domain,DC=com

So the group above is listed in the search context 1, but my admin account is in a different OU, which is search context 2. Bah.

Script to locate incorrect path to disk on Netapp

One of the storage guys sent me an email indicating some of the disk paths were incorrect on some of our newer servers - specifically they were sending data over partner paths to disk (we have 2 heads in a cluster on that filer, so unless its in failover mode, its less efficient to send data via the partner path to disk).

So I wrote a quick script to check the paths on all hosts against the list of erroring paths he sent me:

rm -rf /root/lunerrors.txt
touch /root/lunerrors.txt
for host in `cat horhosts.txt`
do
echo $host > lunerrors.txt
for path in `cat errorpaths.txt`
do
ssh $host /usr/sbin/esxcfg-mpath -l | grep $path > lunerrors.txt
done
done

Mac address conflicts

So it turns out some VMs have been assigned static MAC addresses already, so my script duplicated some MAC addresses in use. Not a huge deal (the network team bitched about some errors) until the following happened:

The SCCM guys assigned an image package via MAC address to those MAC addresses, and didn't restrict it to XP images. So the SCCM box re-imaged some windows 2003 boxes. Thank goodness we have vRanger in production, so the VMs were restored pretty quickly (save one, which errored out, and Vizioncore gave us a beta version which restored it).

I modified the script to use a range outside the first 256 addresses. Make sure you aren't conflicting if you use it, and make sure your imaging guys don't leave the package wide-open like ours did :).

I wrote this script to create VMs, since we're making 350 for the remote access project. It used some code that a co-worked found on the internet, but I modified it appropriately so it would loop and create more than one.

#!/bin/bash
declare -i hexcount=0x0
for vmcount in $(seq 1 5)
do
VMDIR=vdi$vmcount
VMNAME=vdi$vmcount
VMMAC=00:50:56:00:01:$(printf %02x $hexcount)
NFSVOL="cgy-vdi-nfs01"

#Begin pasted script code
#Creates a new Virtual Machine

VMOS="winxppro"
VMDSIZE="20g"
VMMEMSIZE="1024"

mkdir /vmfs/volumes/$NFSVOL/$VMDIR
exec 6>&1
exec 1>/vmfs/volumes/NFSVOL/$VMDIR/$VMNAME.vmx

# write the configuration
echo #!/usr/bin/vmware
echo config.version = '"'8'"'
echo virtualHW.version = '"'4'"'
echo memsize = '"'$VMMEMSIZE'"'
echo floppy0.present = '"'TRUE'"'
echo usb.present = '"'FALSE'"'
echo displayName = '"'$VMNAME'"'
echo guestOS = '"'$VMOS'"'
echo ide0:0.present = '"'TRUE'"'
echo ide0:0.fileName = '"'/vmfs/volumes/vdi-scsi-local/BootableX86_12092008.iso'"'
echo ide0:0.deviceType = '"'cdrom-image'"'
echo ide:0.startConnected = '"'TRUE'"'
echo floppy0.startConnected = '"'FALSE'"'
echo floppy0.fileName = '"'/dev/fd0'"'
echo Ethernet0.present = '"'TRUE'"'
echo Ethernet0.networkName = '"'vmnts222'"'
echo Ethernet0.addressType = '"'static'"'
echo Ethernet0.address = '"'$VMMAC'"'
echo scsi0.present = '"'TRUE'"'
echo scsi0:1.present = '"'TRUE'"'
echo scsi0:1.filename = '"'$VMNAME.vmdk'"'
echo scsi0:1.writeThrough = '"'TRUE'"'
echo scsi0.virtualDev = '"'lsilogic'"'
echo
# close file
exec 1>&-

# make stdout a copy of FD 6 (reset stdout), and close FD6
exec 1>&6
exec 6>&-

chmod 755 /vmfs/volumes/$NFSVOL/$VMDIR/$VMNAME.vmx
# Create Disk & Register the .vmx configuration

#Creates 300mb disk (can be modified for larger disk sizes)
cd /vmfs/volumes/$NFSVOL/$VMDIR
vmkfstools -c $VMDSIZE $VMNAME.vmdk -a lsilogic

#Register VM
vmware-cmd -s register /vmfs/volumes/$NFSVOL/$VMDIR/$VMNAME.vmx

((hexcount=hexcount+1))
done

AMD cpu mask script

I wrote this script when we got a HP DL 585 G2 server to add to our dev/test cluster, which is mostly G1s. It checks all the vmx files on a server, and modifies them to have the correct CPU masking for G1/G2 server vmotions to be successful.

#!/bin/bash

PATH=$PATH:/bin:/usr/bin

for i in `vmware-cmd -l`
do
cp -f --reply=yes $i $i.back
if [ `grep -c "cpuid.80000001.edx =" $i` = 0 ]
then
echo 'cpuid.80000001.edx = "-----------0--------H-----------"' >> $i
else
cp -f --reply=yes $i $i.sed1
sed -e 's/cpuid.80000001.edx = "--------------------H-----------"/cpuid.80000001.edx = "-----------0--------H-----------"/g' $i.sed1 > $i.sed2
sed -e 's/cpuid.80000001.edx = "-----------0--------------------"/cpuid.80000001.edx = "-----------0--------H-----------"/g' $i.sed2 > $i
fi
if [ `grep -c cpuid.80000001.edx.amd $i` = 0 ]
then
echo 'cpuid.80000001.edx.amd = "----0R-----0--------H------T----"' >> $i
else
cp -f --reply=yes $i $i.sed1
sed -e "s/cpuid.80000001.edx.amd = \"-----R--------------H------T----\"/cpuid.80000001.edx.amd = \"----0R-----0--------H------T----\"/g" $i.sed1 > $i.sed2
sed -e "s/cpuid.80000001.edx.amd = \"-----R-----0--------H------T----\"/cpuid.80000001.edx.amd = \"----0R-----0--------H------T----\"/g" $i.sed2 > $i.sed3
sed -e "s/cpuid.80000001.edx.amd = \"-----------0--------------------\"/cpuid.80000001.edx.amd = \"----0R-----0--------H------T----\"/g" $i.sed3 > $i
fi
done