ESXi 5: Expanding datastore by extending local array

April 21, 2012 at 21:48 (VMWare) (, , , , , , , , , , , , , , , , , , )

Recently i extended my RAID 5 array by replacing one-by-one hdd’s with bigger ones and waiting for each to rebuild.

All the instructions are executed on a HP DL360 G6 with an SmartArray P410i controller with only one logicaldisk.

It is highly recommended that you backup all your VM’s before executing a single command – everything worked fine for me but one error in a command could leas to a complete data loss of everything!

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OpenVPN bridge and VMWare ESX 3.5

July 12, 2009 at 13:53 (VMWare) (, , , , )

These days i wanted to add an OpenVPN Server in bridged mode to my Network Infrastructure.

But there was one big problem: the OpenVPN System can’t live on a special Subnet and it cannot be routed through because the Network is maintained by other People which do not want to give me another Subnet and i don’t want to set the OpenVPN Gateway as default gateway in the Network.

 
So the only solution to this was a bridged OpenVPN Server and i set it up in my VMWare ESX 3.5 the following way:

VMWare ESX & OpenVPN

I can connect to the Server from Outside and get an IP-Address from the OpenVPN Server as specified in “server-bridge …..”

 

However i can’t connect to the other system’s in the Subnet, with tcpdump i only see a lot of “who-has” requests but it seems that the ARP replies didn’t go back to the Connected VPN Client.
I tried virtually anything and after a day of research i finally got it working. Why? Simple after all :)

  • First you need to enable Promisc mode for the Virtual Network, this is a setting of the vSwitch under the “Security”  Tab
  • Second, ensure you DO NOT connect more than one Network card to the Virtual Switch providing the vSwitch your OpenVPN Server is connected. That was my main problem.
  • Third, ensure you enable ip_forwarding -> “echo 1 > /proc/sys/net/ipv4/ip_forward”
  • Forth, if you do ping tests and your VPN client is Windows, double, triple-check the firewall is off :)

 VMWare Single

After removing the other Network cards from the Virtual Switch i could reach my complete Network instantly!

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