Category Archives: VMWare

ESXi boot device lost connectivity

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Lost connectivity to the device backing the boot filesystem. As a result, host configuration changes will not be saved to persistent storage.

(slow NetApp filer failover caused lost connectivity to ESXi boot device which is a LUN connected with iSCSI)

# /etc/init.d/hostd restart && /etc/init.d/vpxa restart

ESXi add vlans

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Using ESXi 4.1:

vm705:~ # esxcfg-vswitch --add-pg=vlan301 vSwitch0           
vm705:~ # esxcfg-vswitch --vlan=301 --pg=vlan301 vSwitch0

And this was to move a bunch of VLANs from one vSwitch to another:

vm705:~ # for i in `seq 221 235`; do esxcfg-vswitch -D vlan$i vSwitch0; done;
vm705:~ # for i in `seq 221 235`; do esxcfg-vswitch -A vlan$i vSwitch1; done;
vm705:~ # for i in `seq 221 235`; do esxcfg-vswitch -p vlan$i -v $i vSwitch1; done;

authorized ssh keys for ESXi 5.1

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They go here:

# ls -l /etc/ssh/keys-root/authorized_keys
-rw------T    1 root     root          1572 Jul  9 22:24 /etc/ssh/keys-root/authorized_keys

You can put them on the kickstart server and get them during install using this line in the ks.cfg file:

# install ssh keys
wget http://10.101.40.41/preseed/ESXi/5.1/authorized_keys -O /etc/ssh/keys-root/authorized_keys

get vmware esxi cpu info

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~ # vmwarevim-cmd hostsvc/hosthardware | grep -A10 cpuPkg | grep description
   cpuPkg = (vim.host.CpuPackage) [
      (vim.host.CpuPackage) {
         dynamicType = , 
         index = 0, 
         vendor = "intel", 
         hz = 2833433579, 
         busHz = 333345127, 
         description = "Intel(R) Xeon(R) CPU           E5440  @ 2.83GHz", 
         threadId = (short) [
            0, 
            1,

Here I get the info for 8 different machines to see if they all match:

for i in `seq 1 1 8`; do ssh vm30$i "vim-cmd hostsvc/hosthardware | grep -A10 cpuPkg | grep description"; done;


This works on 4.1 and 5.1 versions.