Tag: NSX

Introducing VMware vCloud Air Advanced Networking Services

Introducing VMware vCloud Air Advanced Networking Services

VMware just announced some additions to it’s public cloud service, vCloud Air, one of the additions is advanced networking services powered by VMware NSX. Today the networking capabilities of vCloud Air are based on vCNS features, moving forward these will be provided by NSX.

If you look at the connectivity options from your Data Center towards vCloud Air today you have:

  • Direct connect which is a private circuit such as MPLS or Metro Ethernet.
  • IPSec VPN
  • or via the WAN to a public IP address (think webhosting)

By switching from vCNS Edge devices to NSX Edge devices vCloud Air is adding SSL VPN connectivity from client devices to the vCloud Air Edge.

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VMware is adding, by using the NSX Edge Gateway, dynamic routing support (OSPF, BGP), and a full fledged L4/7 load-balancer (based on HA Proxy), that also provides SSL offloading.
As mentioned before SSL VPN to the vCloud Air network, for which clients are available for Mac OS X, Windows, and Linux is also available.
Furthermore the number of available interfaces have also been greatly increased from 9 to 200 sub-interfaces, and the system now also provides distributed firewall (firewall policy linked to the virtual NIC of the VM) capabilities.

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The NSX Edge can use BGP to exchange routes between vCloud Air and your on-premises equipment over Direct Connect. NSX Edge can also use OSPF to exchange internal routes between NSX edges or a L3 virtual network appliance.

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NSX also introduces the concept of Micro-Segmentation to vCloud Air. This allows implementation of firewall policy at the virtual NIC level. In the example below we have a typical 3-tier application with each tier placed on its own L2 subnet.

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With micro-segmentation you can easily restrict traffic to the application- and database-tier while allowing traffic to the web-tier, even though, again just as an example all these VM’s sit on the same host. Assuming that at some point you will move these VM’s from one host to another host, security policy will follow the VM without the need for reconfiguration in the network. Or you can implement policy that does not allow VM’s to talk to each other even though they sit on the same L2 segment.

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If you combine this with security policy capabilities in the NSX Edge Gateway you can easily implement firewall rules for both North-South and East-West traffic. The system will also allow you to build a “container” by grouping certain VM’s together and applying policies to the group as a whole. For example you could create 2 applications, each consisting of 1 VM from each tier (web, app, db), and set policies in a granular level. As a service provider you can very easily create a system that supports multiple tenants in a secure fashion. Furthermore this would also allow you to set policies and move VM’s from on-premises to vCloud Air while still retaining network and security configurations.

New Year, New Job.

New Year, New Job.

I’m super excited to be taking on a new role in the NSBU at VMware, as of the 1st of January I’ll officially be joining the team as a Sr. Systems Engineer for the Benelux. I’ll be focused mainly on VMware NSX, including it’s integrations with other solutions (Like vRA and OpenStack for example).

Unofficially I’ve been combining this function with my “real” job for a couple of months now ever since a dear and well respected colleague decided to leave VMware. Recently I was fortunate enough to get the opportunity to attend a 2 week training at our Palo Alto campus on NSX-v, NSX-MH, OpenStack, VIO, OVS,…

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The experience was face-meltingly good, I definitely learned a lot and got the opportunity to meet many wonderful people. One conclusion is that the NSX team certainly is a very interesting and exciting place to be in the company.

In the last few months I got my feet wet by training some of our partner community on NSX (most are very excited about the possibilities, even the die-hard hardware fanatics), staffing the NSX booth at VMworld Europe, and by having some speaking engagements like my NSX session at the Belgian VMUG.

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So why NSX?

In the past I’ve been working on a wide variety of technologies (being in a very small country and working for small system integrators you need to be flexible, and I guess it’s also just the way my mind works #squirrel!) but networking and virtualisation are my two main fields of interest so how convenient that both are colliding!
I’ve been a pure networking consultant in the past, mainly working with Cisco and Foundry/HP ProCurve and then moved more into application networking at Citrix ANG and Riverbed.

The whole network virtualisation and SDN (let’s hold of the discussion of what’s what for another day) field are on fire at the moment and are making the rather tedious and boring (actually I’ve never really felt that, but I’m a bit of a geek) field of networking exciting again. The possibilities and promise of SDN have lot’s of potential to be disruptive and change an industry, and I’d like to wholeheartedly and passionately contribute and be a part of that.

As NSX is an enabling technology for a lot of other technologies it needs to integrate with a wide variety of solutions. 2 solutions from VMware that will have NSX integrated for example are EVO:RACK and VIO. I look forward to also work on those and hopefully find some time to blog about it as wel.

Other fields are also looking to the promise of SDN to enable some new ways of getting things done, like SocketPlane for example, trying to bring together Open vSwitch and Docker to provide pragmatic Software-Defined Networking for container-based clouds. As VMware is taking on a bigger and bigger role in the Cloud Native Apps space it certainly will be interesting to help support all these efforts.

“if you don’t cannibalise yourself, someone else will”
-Steve Jobs

I’m enjoying a few days off with my family and look forward to returning in 2015 to support the network virtualisation revolution!

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NSX Logical Load Balancer

NSX Logical Load Balancer

VMware NSX is a network virtualisation and security platform that enables inclusion of 3rd party integration for specific functionality, like advanced firewalling, load-balancing, anti-virus, etc. Having said that VMware NSX also provides a lot of services out of the box that depending on the customer use-case can cover a lot of requirements.

One of these functionalities is load balancing using the NSX Edge Virtual Machine that is part of the standard NSX environment. The NSX Edge load balancer enables network traffic to follow multiple paths to a specific destination. It distributes incoming service requests evenly (or depending on your specific load balancing algorithm) among multiple servers in such a way that the load distribution is transparent to users. Load balancing thus helps in achieving optimal resource utilization, maximizing throughput, minimizing response time, and avoiding overload. NSX Edge provides load balancing up to Layer 7.

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The technology behind our NSX load balancer is based on HAProxy and as such you can leverage a lot of the HAProxy documentation to build advanced rulesets (Application Rules) in NSX.

Like the picture above indicates you can deploy the logical load balancer either “one-armed” (Tenant B example) or transparently inline (Tenant A example).

To start using the load balancing functionality you first need to deploy an NSX edge in your vSphere environment.

Go to Networking & Security i your vSphere Web Client and select NSX Edges, then click on the green plus sign to start adding a new NSX edge. Select Edge Services Gateway as an install type and give your load balancer an indicative name.

LB001

Next you can enter a read-only CLI username and select a password of your choice. You can also choose to enable SSH access to the NSX Edge VM.

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Now you need to select the size of the Edge VM, because this is a lab environment I’ll opt for compact but depending on your specific requirements you should select the most appropriate size. Generally speaking more vCPU drives more bandwidth and more RAM drives more connections per second. The available options are;

  • Compact: 1 vCPU, 512 MB
  • Large: 2 vCPU, 1024 MB
  • Quad Large: 4 vCPU, 1024 MB
  • X-Large: 6 vCPU, 8192 MB

Click on the green plus sign to add an Edge VM, you need to select a cluster/resource pool to place the VM and select the datastore. Typically we would place NSX edge VMs in a dedicated Edge rack cluster. For more information on NSX vSphere cluster design recommendations please refer to the NSX design guide available here: https://communities.vmware.com/servlet/JiveServlet/previewBody/27683-102-3-37383/NSXvSphereDesignGuidev2.1.pdf

LB002Since we are deploying a one-armed load balancer we only need to define one interface next. Click the green plus sign to configure the interface. Give it a name, select the logical switch it needs to connect to (i.e. where are the VMs that I want to load balance located) configure an IP address in this specific subnet (VXLAN virtual switch) and you are good to go.

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Next up configure a default gateway.

Screen Shot 2014-12-03 at 21.03.50Configure the firewall default policy and select Accept to allow traffic.

Screen Shot 2014-12-03 at 21.04.22Verify all setting and click Finish to start deploying the Edge VM.

Screen Shot 2014-12-03 at 21.05.13After a few minuted the new Edge VM will be deployed and you can start to configure load balancing for the VMs located on the Web-Tier-01 VXLAN virtual switch (as we selected before) by double clicking the new Edge VM.

Click on Manage and select Load Balancer, next click on Edit and select the Enable Load Balancer check box.

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Next thing we need is an application profile, you create an application profile to define the behavior of a particular type of network traffic. After configuring a profile, you associate the profile with a virtual server. The virtual server then processes traffic according to the values specified in the profile.

Click on Manage and select Load Balancer, then click on Application Profiles, give the profile a name. In our case we are going to load balance 2 HTTPS webservers but are not going to proxy the SSL traffic so we’ll select Enable SSL Passthrough.

LB006Now we need to create a pool containing the webservers that will serve the actual content.

Select Pools, give it a name, select the load balancing algorithm.

Today we can choose between;

  • Round-robin
  • IP Hash
  • Least connection
  • URI
  • HTTP Header
  • URL

Then select a monitor to check if the severs are serving https (in this case) requests.
You can add the members of the pools from the same interface.

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Now we create the virtual server that will take the front-end connections from the webclients and forward them to the actual webservers. Note that the Protocol of the virtual server can be different from the protocols of the back-end servers. i.e. You could do HTTPS from the client webbrowser to the virtual server and HTTP from the virtual server to the back-end for example.

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Now you should be able to reach the IP (VIP) of the virtual server we just created and start to load balance your web-application.

LB008Since we selected round-robin as our load-balancing algorithm each time you hit refresh (use control and click on refresh to avoid using the browsers cache) on your browser you should see the other webserver.