Help! VSAN is empty after black out!

We had a power failure and all the ESX Servers restarted. After that they returned the/vmfs/volumes/vsanDatastore was empty. all our virtual machines were VSAN, including vcenter.

How can I recover my VM? My entire infrastructure broke down.

brugh2,

It certainly looks like a partition of the network occurred. We have a single node in our cluster instead of the three you mentioned should be there. If this is the case on all three nodes, we can form a college and get production line.

You have a request for Support VMware class? If you do, please PM me the SR number?

In addition, we can try a few things.

(1) on each host, make sure that the marking system is intact and we are associated with a vmknic:
# esxcli vsan network list *.

(2) if the network is always marked properly (it must be), try to ping each VSAN each VSAN node node (for example, ping your partner machines).

(3) if the ping works, determine if we use frames. If we are to ensure that the configured completely extended frames (vmknic, vswitch, physical NIC, physical switch). **

--> If jumbo frames are in use, send a ping large frame without allowing fragmentation:

# vmkping s - 8500D

(4) if (if applicable) jumbo frames do NOT work, set the MTU value in the physical switch or drop your vmknics down to MTU 1500.

(5) if any to the extracted transport level, we very likely have a problem with multicast. Validate your IGMP groups, spying, couriers, etc on the physical switch to ensure that multicast is handled correctly.

Please let me know how things are going!

* The output should look like this (from my infrastructure):

Interface

VmkNic name: vmk1

IP Protocol: IPv4

Interface UUID: 9ebf0854-3a78-734f-b15e-90b11c2b6604

Agent group multicast address: 224.2.3.4

Agent Group Multicast Port: 23451

Multicast Address Group Master: 224.1.2.3

Master Group Multicast Port: 12345

Multicast TTL: 5

* You can use the following commands to check the configurations of jumbo frame (I don't use them, so my MTU are every 1500):

~ # esxcfg - vmknic - l | grep vmk1<== i="" am="" examining="" vmk1="" because="" that="" is="" the="" interface="" we="" got="" from="">

vmk1 VSAN IPv4 172.200.200.207 255.255.255.0 172.200.200.255 00:50:56:68:00:fb 1500 65535 true STATIC

~ # esxcfg - vswitch - l

[ ... ]

Name of the switch Ports used num configured Ports Ports MTU Uplinks
vSwitch1 2352 6 128 1500 vmnic2, vmnic3
PortGroup name VLAN ID used rising Ports
VSAN 0 1 vmnic2, vmnic3

^^ the vmknic is called "VSAN," as it is the name of the port group. If you a vSwitch distributed, you must get the port instead of a portgroup name number (the number will always be in the esxcfg-vmknic output - l).

~ # esxcfg - NICS - l

Name PCI Driver link speed Duplex MAC address MTU Description

[ ... ]

vmnic2 0000:41:00.00 bnx2x Up 10000Mbps Full 00:10:18:f1:b8:40 1500 Broadcom Corporation NetXtreme II 10 Gigabit Ethernet BCM57810

vmnic3 0000:41:00.01 bnx2x Up 10000Mbps Full 00:10:18:f1:b8:42 1500 Broadcom Corporation NetXtreme II 10 Gigabit Ethernet BCM57810

^^ Here are the two physical NICs used as uplinks ports vmknic group.

All of the above MTU is 1500 bytes. If you use frames, they should all be 9000 bytes.

Tags: VMware

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