This is a frustrating problem. Don't understand why in my company's production systems, the standard VMware installation instructions don't work.
I had no issues on my home lab. (hair pulling)
You configure the new hostname using the instructions from the vMA user guide, configuration is done through the web interface on port 5480 and/or directly from the VM console, and/or from a SSH session.
The moment you reboot the system, it reverts back to localhost.localdomain. It does not matter if you initiate the reboot from the web interface on port 5480 or from a shell session.
Anyhow, to fix this problem, create an "A" record on the AD DNS server, then from shell run "sudo -i" (this will drop you into a root session (text color will change to red), then run Suse's network configuration utility "system-config-network-tui"
Reference: http://communities.vmware.com/message/2159792?tstart=0
Edit (4/4/2013):
Same thing happened to my home vMA.
Monday, April 1, 2013
Tuesday, October 2, 2012
Unsolicited advice on how to get a job as a VMware admin or in general get a job in the IT industry
This contents of this post was in reply to this thread in certcollection.org - an excellent resource for learning and like minded individuals.
Oh BTW, there's a 25% voucher code posted on this same thread for VCP and VCAP exams.
The route into IT as a career usually isn't as straightforward. If you don't have the experience, be prepared to take a lower rung and lower paying position to get a foothold into a company and into the industry. Good and excellent System Administrators can't be trained in school. A quality of a good Systems Administrator is of continued learning and the ability to adapt that learning to whatever environment he/she happens to end up working in.
Usually when an organization hires a VMware admin, he or she is also expected to be extremely good at other aspects of technology.
VMware is just a platform, you have to prove you know more than just a platform. Usually, employers will not take risks with n00bs - as specially for datacenter type positions. There are other nuances a potential IT wannabe needs to know. Essentially, it's not just about how much you know and how well you know technology. It's about seeing the big picture. The book mentioned further in this topic will help give an idea of what the big picture is about.
Meanwhile, you can bolster your knowledge and skills while looking for a position by continued learning.
The difference between a good admin and a savant is how much that person puts into self study.
I would suggest that you pickup a copy of "The Practice of System and Network Administration, Second Edition" (Amazon link here) - it's a very very good read and will give you a very good insight into the industry. It will help you with your mindset and the setting of career goals.
For a career in IT, you need to set a target or end goal. Then set the waypoints to that goal. If not, you will find yourself clueless and directionless.
You also will need to keep up with technology trends, spot emerging trends, how they relate and can be used in the corporate world. You will then need to learn those technology before it becomes the "in" thing. Only that way will you be able to demand a premium for your services.
This book has proven very useful to me - it's one of those books I wish I had read earlier.
Good luck in your search!
Oh BTW, there's a 25% voucher code posted on this same thread for VCP and VCAP exams.
The route into IT as a career usually isn't as straightforward. If you don't have the experience, be prepared to take a lower rung and lower paying position to get a foothold into a company and into the industry. Good and excellent System Administrators can't be trained in school. A quality of a good Systems Administrator is of continued learning and the ability to adapt that learning to whatever environment he/she happens to end up working in.
Usually when an organization hires a VMware admin, he or she is also expected to be extremely good at other aspects of technology.
VMware is just a platform, you have to prove you know more than just a platform. Usually, employers will not take risks with n00bs - as specially for datacenter type positions. There are other nuances a potential IT wannabe needs to know. Essentially, it's not just about how much you know and how well you know technology. It's about seeing the big picture. The book mentioned further in this topic will help give an idea of what the big picture is about.
Meanwhile, you can bolster your knowledge and skills while looking for a position by continued learning.
The difference between a good admin and a savant is how much that person puts into self study.
I would suggest that you pickup a copy of "The Practice of System and Network Administration, Second Edition" (Amazon link here) - it's a very very good read and will give you a very good insight into the industry. It will help you with your mindset and the setting of career goals.
For a career in IT, you need to set a target or end goal. Then set the waypoints to that goal. If not, you will find yourself clueless and directionless.
You also will need to keep up with technology trends, spot emerging trends, how they relate and can be used in the corporate world. You will then need to learn those technology before it becomes the "in" thing. Only that way will you be able to demand a premium for your services.
This book has proven very useful to me - it's one of those books I wish I had read earlier.
Good luck in your search!
Monday, September 3, 2012
Fix - Citrix XenAppWeb.msi v11.0.0.5357 problem with IE9
Hopefully, this will save someone lots of hair-pulling.
Symptoms:
IE9 crash on connection, IE9 goes into install loop upon connection with web interface.
Other error messages during debug process:
"The configuration manager cannot be initialized"
Offending client version information:
11.0.0.5357 - GUID {388C130B-0079-46B4-A0D5-DC2DD7A89A7B}
Solution:
This is a known problem see Citrix KB CTX126653 and CTX129082
Download client Online Plug-in 12.3, Release Date: 4/16/2012
Other useful KBs:
Manually removing files that might remain after uninstalling the Citrix receiver for Windows.
http://support.citrix.com/article/CTX325140
This article has a table with GUIDs that might be useful:
http://support.citrix.com/article/CTX121917
Symptoms:
IE9 crash on connection, IE9 goes into install loop upon connection with web interface.
Other error messages during debug process:
"The configuration manager cannot be initialized"
Offending client version information:
11.0.0.5357 - GUID {388C130B-0079-46B4-A0D5-DC2DD7A89A7B}
Solution:
This is a known problem see Citrix KB CTX126653 and CTX129082
Download client Online Plug-in 12.3, Release Date: 4/16/2012
Other useful KBs:
Manually removing files that might remain after uninstalling the Citrix receiver for Windows.
http://support.citrix.com/article/CTX325140
This article has a table with GUIDs that might be useful:
http://support.citrix.com/article/CTX121917
Saturday, August 18, 2012
Technical summary of real-world perfomance between SSD controllers and manufacturers.
Reliability, performance and usable space.
While looking for SSD promotions, stumbled across the SSD 60GB Benchmarks and Review on tomshardware.com. Have summarized about 3 hours of research and reading in this post with links to relevant sites."Using reliability as a differentiator ...we shouldn't be looking for the cheapest SSD, but rather the most trustworthy one."
"When it comes to picking a 60 GB SandForce-based boot drive, NAND type is the biggest determinant of performance"
"Samsung uses Toggle NAND in the 830, which is a little better than synchronous, and a lot better than asynchronous"
Right. So many brands, so many mixes of controllers and NAND types. Different sizes. Different manufacturer published benchmarks, different opinions in forums/blogs. And then there is the price difference between products from the same manufacturer. And price differences between manufacturers using the same controller type... Pretty confusing isn't it?
After playing the the OCZ synapse (please stay away from theses. It works, yes, but it affects reliability), the Intel 25M-G2, Intel 320, Crucial M4, Samsung 470, Samsung 830 over a period of two years.
Personally, my preference right now is the Samsung 830. Have actually SEEN it go to 400MB/s speed while doing a VMware Workstation VMDK defrag. The Crucial M4 comes at a close second with the max seen rate at around 380MB/s.
Samsung SSDs (mostly 470s) are used in MACs, HPs, Lenovos as their base HDD - this should be a great indicator of the reliability of Samsung's products.
In my humble opinion, when considering which SSD to buy, the type of NAND used and the controller within the SDD is the most important factors to consider. Before purchasing, research what kind of NAND is in use on the SSD. Avoid asynchronous NAND - it has a pretty bad performance penalty as the drive fills up. Also avoid those SSDs that use compression. I don't have a good impression of OCZ and there's a saying going around in forums for OCZ "Live fast die fast".
Lastly, from what I've read so far, it's generally not a good idea to use sector-level encryption for SSDs. It will hasten the wear out of the NANDs. My guess is that the OEM version of the Samsung 470 may have this consideration built into the design but have no way to confirm as yet.
What follows is a summary of the information from that article and some research on the 3(?!) types of NAND available in the SSD market now.
SUMMARY FOLLOWS:
SSD CONTROLLERSTests repeated on the SF-22xx-based SSDs accessing asynchronous NAND, found that only the 60GB capacities are affected significantly due to the low number of NANDS available for use by the firmware.
Read speeds are significantly impacted by the drive's free space. There is a noticeable drop-off on the lower-capacity SF-22xx-based SSDs due to compression and SandForce's foreground garbage collection mechanism.
Reading back information written on 60 GB Agility 3 falls between 150-200 MB/s and 450 MB/s on free space.
Intel 520 SSDs perform better, incompressible data is read back at 250 MB/s, 100 MB/s faster than the OCZ Vertex 3.
Crucial M4 (on Marvel controllers) use background garbage collection and does not compress data making it unaffected by the SSD's fill state.
FLASH MEMORY (NAND) TYPE
The OCZ Vertex 3 behaves alot like Corsairs' Force GT when it comes to the performance data using synchronous NAND.
It doesn't matter much which firmware on the various manufacturers, and how they are tweaked, as the SF firmware elements remaing the same. "The relationship between hardware and firmware (and how it affects features like TRIM and garbage collection) functions identically from one drive to the next" - be it on a MAC or a PC.
POWER COMPONENTS
There a cheap types which might fail earlier due to wear and tear (conjecture at this point)
OTHER OPINIONS AND COMMENTS FROM FORUMS
Friday, August 17, 2012
Thursday, August 16, 2012
Windows 2003 - Enable OS firewall to allow exceptions by IP(s) and IP range(s).
There is no elegant way to do this on Windows 2003 Server.
The following will add TCP ports 5500 to 5700 one at a time - run at the command line.
"FOR /L %I IN (5500,1,5700) DO netsh firewall add portopening TCP %I "Passive FTP"%I"
The inelegant way is to add port range, you can use the GUI to add that range to a defined port then export that registry entry and make changes to that .reg file and import it back.
Will update details at later time.
The following will add TCP ports 5500 to 5700 one at a time - run at the command line.
"FOR /L %I IN (5500,1,5700) DO netsh firewall add portopening TCP %I "Passive FTP"%I"
The inelegant way is to add port range, you can use the GUI to add that range to a defined port then export that registry entry and make changes to that .reg file and import it back.
Will update details at later time.
Thursday, July 26, 2012
HOWTO Fix vCenter 4 search not working
First, reset Web Service in vCenter.
Then if it still doesn't work, on the vSphere clien (not verified nor tested)t:
1. Click Plug-in -> manage Plug-ins
2. Right click Hardware Status plugin and select Disable
3. Close and re-open vSphere client.
4. Click Plug-in -> manage Plug-ins
5. Right click Hardware Status plugin and select Enable
(Solution from one of my colleagues. Am not sure if this step is correct.. What does "Hardware Status" plugin have to do with search?)
If steps for client are wrong, welcome corrections.
Then if it still doesn't work, on the vSphere clien (not verified nor tested)t:
1. Click Plug-in -> manage Plug-ins
2. Right click Hardware Status plugin and select Disable
3. Close and re-open vSphere client.
4. Click Plug-in -> manage Plug-ins
5. Right click Hardware Status plugin and select Enable
(Solution from one of my colleagues. Am not sure if this step is correct.. What does "Hardware Status" plugin have to do with search?)
If steps for client are wrong, welcome corrections.
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