I am trying to determine the cause of outages i have experienced on an irregular basis with several of my virtual servers which run on vmware esxi4. I have 12 virtual servers spread across 2 esxi host machines and i've only noticed this problem with 3 of them. The virtual servers with problems are one ftp server and two dns servers.
When the outages occur i can log into the vSphere client and use the console of the virtual servers in question, but during the outages (which last anywhere from a minute to near an hour) the virtual servers seem to either experience incredibly slow network transfer speeds in the order of 0-3 kilobits per second or no connection at all. (the datacentre they are in has 100mb connection)
The OS on the machines is debian lenny, and is regularly updated.
I haven't been able to determine the cause of these outages and they really are beginning to bother me so any help in determining the cause of these problems would be much appreciated.
the logfile from esxi contains only
Feb 08 13:16:57.981: mks| SOCKET 8 (105) recv error 104: Connection reset by peer Feb 08 13:16:57.981: mks| SOCKET 8 (105) destroying VNC backend on socket error: 1 Feb 08 13:16:57.998: mks| MKS: Base polling period is 1000000us Feb 08 20:28:14.774: mks| MKS: Base polling period is 10000us Feb 08 20:28:15.194: mks| VNCENCODE 9 encoding mode change: (720x400x16depth,16bpp,1440bytes/line) Feb 08 20:28:15.228: mks| VNCENCODE 9 encoding mode change: (720x400x16depth,16bpp,1440bytes/line)
repeated several times. Is this simply me connecting and disconnecting to/from the console?