CentOS 7 minimal Network configuration

#nmtui

#systemctl restart network

#ip addr

Amazon to Launch Cloud Data Center in Korea

Amazon’s announcement, which the company’s chief cloud evangelist Jeff Barr made in a blog post Wednesday, is yet another example of US-based cloud giants going aggressively after Asia’s rapidly growing cloud services market.
Other recent examples are IBM’s deal with Chinese data center provider 21Vianet to provide its Bluemix Platform-as-a-Service to customers in China and the launch of IBM’s first SoftLayer data center in India. Microsoft launched three cloud data centers in India earlier this year.
Asian cloud service providers are expanding data center capacity in the region too. Chinese e-commerce and cloud giant Alibaba recently brought online a new data center in the Zhejiang Province.
Barr listed existing Korean customers that will be able to take advantage of Amazon’s new cloud data center capacity when it comes online. They include startups, gaming companies, and enterprises, the latter category including the electronics giant Samsung.
“These customers (and many others) have asked us for a local region,” Barr wrote. “We are looking forward to making it available to them and to many other enterprises, startups, partners, government agencies, and educators in Korea.”

http://www.datacenterknowledge.com/archives/2015/11/05/amazon-to-launch-cloud-data-center-in-korea/

Amazon brings Microsoft users into AWS with Active Directory service

Amazon has launched an AWS Directory Service for Active Directory, a fully managed implementation of Microsoft's authentication and user management service.

Using Active Directory in Amazon's cloud will enable companies to bring applications including SQL Server, SharePoint and custom applications built with .NET onto AWS. That's useful for businesses trying to move into the cloud from an on-premises deployment of Microsoft's software. 

When companies start using the service, it creates a pair of domain controllers connected to a user's virtual private cloud running Windows Server 2012 R2. Each domain controller runs in a different availability zone of a user's choosing inside a single region, and Amazon will handle the nuts-and-bolts of managing things like host monitoring, data replication and snapshots.

Administrators will be able to configure a trust relationship between their on-premises Active Directory and the AD in Amazon's cloud, so that users can sign in to both systems using one login. 

Companies can try the service for free for one month or 750 hours, whichever comes first. After that, the service costs US$0.40 per hour. 

It's an interesting move for Amazon, since one of the key products Microsoft uses to push its cloud services into large enterprises is Azure Active Directory -- a fully managed, cloud-based implementation of Microsoft's authentication and user management service with a whole bunch of other services and integrations baked in. It's an easy way to get one part of a business into Azure, which Microsoft can then use to try and upsell companies on other cloud services. 

How Amazon plans to expand this service to better compete against Azure AD remains to be seen, especially as it continues to fight with Microsoft to pursue dominance in the public cloud market.

My Local Probe is constantly "disconnected". What can I do?

Change Mac Scan Setting

By default, on services startup, PRTG tries to detect all available network adapters on the system running a probe (this includes, for example, the PRTG core server).

On few systems, this might lead to an exception so that the probe cannot fully connect to the core server. In this case, please try to disable the initial detection of available network cards.

Caution: Please backup your system before manipulating the Windows registry!

Step 1

• On the system running the PRTG core server, open the registry editor.

• For a 64-Bit Windows system, go toHKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Paessler\PRTG Network Monitor\Probe\

• For a 32-Bit Windows system, go toHKEY_LOCAL_MACHINE\SOFTWARE\Paessler\PRTG Network Monitor\Probe\

Note: For PRTG 8 you might see the values in the additional sub-key V7 or V8.

Step 2

• Add a new DWORD value with the name NoMacScan.
• Set this to 1 to disable the initial search for network adapters.

 http://kb.paessler.com/en/topic/29483-my-local-probe-is-constantly-disconnected-what-can-i-do

Top 5 Web Hosting Talk Threads – Nov. 20, 2015

by Nicole Henderson on Friday, November 20 2015

Add Your Comments

Every week our colleagues at Web Hosting Talk compile the top 5 most popular forum threads. Want to join in the conversation? Leave your thoughts in the comments and visitWeb Hosting Talk to sign up and learn more.

Is Shared hosting secure and safe?
Is shared hosting a good option for an ecommerce site? A small seller and new WHT member wants to know what type of hosting to use on a budget.

How risky is hosting from cheap hosting?
This WHTer wants to know the risks associated with hosting plans that cost $5 or $10 per year. Do you have any exerpience with extremely cheap hosting and insights you can share?
How can we start selling cloud hosting
In this thread a WHT member wants to know how to start selling cloud hosting and whether there is any such thing as a cloud dedicated server.
Someone offered to buy my domain (is it legit?)
A WHTer is looking for some advice around an offer on his domain that may be too good to be true.
Chargeback ~ How do you respond?
How do hosting companies respond toPayPal when customers look for chargeback? That’s the question in this WHT thread, still hot from last week.

Virtual Machine in XenServer Will Not Shut Down or Start; Stuck/Frozen Starting/Stopping

Virtual Machine in XenServer Will Not Shut Down or Start; Stuck/Frozen Starting/Stopping

If you’ve worked with XenServer for any length of time, you have no doubt experienced having a VM turn “orange” or “amber” or otherwise become unmanageable.  Here are couple of similar problem scenarios and solutions that might help.

Problem Scenario #1:

You notice that a VM has numerous lifecycle events on a XenServer.  It has continuously attempted to shutdown, but remains in the green/on state.  The VM will not display a console, or POST information.   Manual shutdowns in XenCenter do not work (Shutdown or Force Shutdown).

Solution:

You may have success trying some of these ideas, or it may take a combination of these to obtain control of the stuck VM.

1. Start by trying an ‘xe-toolstack-restart’ on the pool master server.   This is the easiest fix, and will work a majority of the time.   You will lose connection to your pool momentarily.  If this doesn't work, go onto the next steps listed below.
2. If this is a XenDesktop hosted VM, put the VM in maintenance mode, if you cannot force a Start/Shutdown from the DDC
3. From the XenServer console, try the following command to force a shutdown:  ‘xe vm-shutdown –force vm=VMNAME’.  If VM does not shutdown with this command, proceed to next step
4. In XenCenter, once the above two items are done, attempt to "Reboot" the VM. It may restart now.

Related Issue:

I experienced a similar issue where all members were down in a XenServer pool, but the pool Master remained up and functional.  The 'toolstack' processes were not running on pool members. An ‘xe-toolstack-restart’ was required on each pool member XenServer before the server would appear functional and participate in the XenServer Pool.

Problem Scenario #2:

This is the most common scenario you will see.  A virtual machine will go into an “amber” or “orange” state and you are unable to shutdown, reboot, or even forcefully reset the VM.

Solution:

1. Find the UUID of the hung VM.
   You can do this via the command line with ‘xe vm-list’ or via XenCenter.
2. Find the Domain ID of the hung VM.
   Run ‘list_domains’ from the command line, and match the UUID with the ID number

3. id |                                 uuid |  state
   0  | 2fe455fe-3185-4abc-bff6-a3e9a04680b0 |    R
   47 | 267227f3-a59e-dafe-b183-82210cf51ec4 |    B
   59 | 298817fb-8a3e-7501-11e0-045a8aa860ff |    B
   60 | 46e3d5aa-2f02-dfdc-b053-9a8ac56ec5d1 |    B
   61 | 16cf3204-eb17-5a12-e8d0-c72087bda690 |    B
   62 | 1f9053b5-c6ca-40bb-504e-3017c37e7281 |    H
   63 | ddaec491-097a-e271-362b-f2f985e26e4a |    R
   65 | 55f3b225-4f65-d1ea-aa19-add44c5acce7 |    B
   66 | 7adef6fd-9171-5426-b333-6fb1b57b8e60 |    B H
   67 | 6046dc13-f70b-8398-56fb-069c22440a7c |    B
   68 | f201cd94-a501-00c2-d21e-8c2f03ea167b |    B H

4. Run destroy_domain on the Domain ID.

   # /opt/xensource/debug/destroy_domain -domid 62

5. The VM will still show itself as running, so now, we need to reboot it.

   # xe vm-reboot name-label='name of the VM' –force

6. The VM is now rebooted, and you can bring it up as if you had just pulled the plug.  That is, check for some disk corruption, etc.


Resource:
http://support.citrix.com/article/CTX131421

Holiday event !!

Microsoft hones focus on enterprise mobility and security with Azure

http://www.zdnet.com/article/microsoft-hones-focus-in-on-enterprise-mobility-and-security-with-azure/