Tag Archives: Vmware

Documenting, testing, reviewing and analyzing your virtual infrastructure.

When we analyze our system we must keep a log of the data as time progresses we can review and compare how our system has performed over time and determine what software and services are the most intensive and what can we do to improve them. For example keeping a log for each virtual machines CPU / Memory usage over time can indicate when the machine has had an issue, can help us find the any vulnerabilities in the system and can also give us an indication if the system has been infected with a virus and has not been detected by the anti-virus.

Viruses like worms hog up system resources and spread through the network infecting more more system as they go on. If we see a sudden spike in the system using too much resources it will be a cause for concern . Viruses can spread from vm to host (although it is very difficult ) it is possible that they can spread since they use the same hardware resources. Most importantly software developers should be aware of these vulnerabilities and make sure that visualization software and software on the virtual machines is properly virtualiazed.

Using spread-sheet software we can create charts and visual representations of how virtual machines have performance over time and in addition create a list with all the vulnerabilities found in the systems over time. This allows to view the data in an easy to read way and acknowledge what how safe our virtualized solution is from threats . Keeping logs is very important for reviewing any problems that happened over time .

Software we can use to create a better analysis is one like ELKI which can be used to create also future prediction of the possible usage and more. We must plan and adapt to ever changing hardware requirements be continuously upgrading software and hardware to meet standards that are set by the company in order to function correctly.

To build  a stable infrastructure we need feedback and lots of times to fix any issues regarding it. To collect feedback from customers we can ask them to complete a questionnaire regarding the system every end of month. We can then use that data  in the forms of graphs and charts to allow us to see any improvements regarding the system . Also we can review any issues the users might have with the infrastructure and also prioritize any common issues that arise .

         Meetings can be setup to inform the IT staff each month of the findings and allow the staff to discuss any issues that have risen in the last month from their point of view . For example if end users and having a difficult time accessing certain services , if bandwidth is not enough for the users to use voip and other network services simultaneously . This can be solved by integrating QOS (Quility of Service ) allowing us to configure which services have priority over others . In most cases using QOS will eliminate most bandwidth issues when using a decent connection .

            Using the data collected we can can test any changes we would like to make to the system in a virtualised environment, so that if any thing goes wrong we can just roll back to a previous snapshot in just a matter of minuets . If one of the virtual machines has a virus we can be assured that it cannot spread to the host machine allowing us to safely deal with the virus in the vm with out affecting the host system .

            On every operating system there are built in tools to monitor the performance of the system which display data in a visual way which allow for easy monitoring of the system. Performance monitor in windows gives use the option to display data on almost anything on the system . We can set it up to create a log file every so often and give us an analysis on the data gathered .

            We can also monitor Linux systems with a program called ajenti which gives us a web interface of the Linux system allowing to see system information such as disk space , processor usage , disk usage , free ram space , swap file and much more . It will also keep logs of any event that happens on the system  and even allowing us to use the terminal remotely.

            Even though visualization is a revolutionary step in forward in technology we cannot virtualize everything . For example even thought  developers can develop in  virtual environments they can virtualize specific hardware like graphics cards . Games for example cannot be run in a machine since they need the drivers necessary to work . Code will