Category Archives: Virtualization

Contabo: A great cloud for personal use

Posted on October 30, 2023 by blogger

I’m a personal user of Contabo’s cloud services, and I’ve been delighted with them. They offer a wide range of services to choose from, including VPS, dedicated servers, and cloud storage. I’m currently using a VPS to host my personal … Continue reading →

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Update GNS3 server on GNS3 IOU VM

Posted on September 29, 2015 by blogger

GNS3 Sourceforge account provides an OVA image ready to run gns3-server for those who want to use Cisco IOS on Unix images . However, at the time of this writing, the gns3-server version is outdated (1.3.3). The client must have … Continue reading →

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VMware and Windows poor TCP performance

Posted on October 23, 2014 by blogger

I have had a strange issue lately with Windows servers on VMware vSphere 5.1 hosts. Throughput of TCP connections between some virtual machines were very very slow, barely 10 mbit/s . The behavior was easily reproducible : just start an … Continue reading →

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VMware vCSA 5.1 password expiration

Posted on February 21, 2014 by blogger

A few months ago, I was unable to login on my vCSA. At that time, I thought it ws a glitch, I rebooted (didn’t fix the issue) and changed the password of the users, which fixed the issue. Recently, I … Continue reading →

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LSI Megaraid Storage Manager and VMware ESXi

Posted on November 15, 2013 by blogger

I had to configure a bunch of ESXi 5.1 servers with LSI 9240-4i hardware RAID controllers the other day. This RAID controller is perfectly supported in ESXi 5.1 but it lacks the monitoring features. To have these, you need to … Continue reading →

Posted in Computer, Networking, Virtualization, VMware | 2 Comments

Nagios and SNMP traps

Posted on August 29, 2013 by blogger

It has been explained many times over the internet, so I won’t cover that. One thing you have to pay attention to is, if you run snmptt as a daemon, be sure that it has the right to write to … Continue reading →

Posted in Computer, Linux, Networking, Virtualization | 1 Comment

Don’t use SQL Server 2012 with VMware vCenter and modules yet

Posted on June 9, 2013 by blogger

Update: I just saw that since April 25th, SQL Server 2012 and Windows Server 2012 are supported by VMware vCenter 5.1U1 . All information is available here : blogs.vmware.com/vsphere/2013/04/vmware-vcenter-server-5-1-update-1-released.html Original November 21th 2012: While it is working with the SSO … Continue reading →

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Ubuntu 12.04 on HP Microserver N40L

Posted on July 4, 2012 by blogger

Just some thoughts and things I’ve done. The hardware is the following: the Microserver itself, 2x 4GB DDR3, one 16GB USB flash drive, some 2TB SATA hard drives, Logitech S-150 USB speakers, and a GT520 HDMI+DVI graphic card. Installation on … Continue reading →

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vSphere NIC teaming, Cisco router and HP Procurve switches

Posted on April 27, 2012 by blogger

So, like me, you want to have redundancy for your virtual machine network. For my lab setup, I use a refurbished Cisco router 3825 with two gigabit interfaces, two Procurve 2810-24G and a small server with 4 gigabit interfaces for … Continue reading →

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vSphere CPU performance monitoring

Posted on April 13, 2012 by blogger

Vos machines virtuelles sont lentes, vous pensez que le CPU n’est pas en cause parce que vous avez une utilisation faible des pCPU ? Regardez-y à deux fois, il se pourrait que vos VM attendent du pCPU disponible! Pour vérifier … Continue reading →

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