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Business Continuity and Workload Mobility for Private Cloud (CVD Part 3)

What is Next-Gen Workload Mobility for the Private Cloud?

Enterprises across the globe have been asking for simpler ways to provide multi-site Business Continuity and Workload Mobility for applications hosted in their Private Cloud. The Cloud promises a more agile operational environment and that promise has been fulfilled to a large extent within their data centers. But many Enterprises are challenged to unlock this same agility across multi-site Cloud topologies. For example, Enterprise CTOs and CIOs have asked us directly to provide simplified Workload Mobility of critical apps between sites to give their operations teams more flexibility.

Many competitive solutions offer basic VM mobility between sites and storage replication, but do not address the rest of the application environment including: security, stateful services, network containers, tenancy, and most importantly both physical and virtual resources.

What good does it do to move a VM to a new site if the rest of the application environment is left behind causing a potential security hole?

This blogs directly addresses multi-site Workload Mobility and provides some compelling test results from our new Business Continuity and Workload Mobility Solution for Private Cloud.

How to move a LIVE 3-tier app like Microsoft SharePoint to a new site (without impacting users) 

As we all know, business critical applications require a robust service environment to operate securely across the cloud. In our example below, the application environment provides firewall and load balancing services for each tier of the SharePoint application; web, app, and database tiers. These services are stitched together using a secure Network Container that carve out a slice of resources across the data center for SharePoint. Most Enterprises and SPs use a mix of physical and virtual resources including firewalls, load balancers, VPN termination, IDS, and network switching. Many of these services create stateful connections to users, so….

  • If you perform a live migration of SharePoint to a new site, stateful connections to firewalls and load balancers need to be preserved to maintain security and TCP connections to active users.

          Broken user connections = Service disruption (that’s not good)

  • You must also provide identical security and services for new SharePoint users even though the application has moved to a new site.     

           Broken Network Services = Potential Security hole (that’s even worse)

 Blog-3-Sharepoint-Container

How does Next-Gen Workload Mobility actually work?

Let’s share some test results from our new Business Continuity and Workload Mobility Solution to illustrate how we performed live SharePoint migrations to a new site (75 km away) while maintaining security, stateful services, and user connections.  Oh yes, automatically without manual intervention.

Baseline topology for Microsoft SharePoint deployed in our Private Cloud

We first deployed the SharePoint Web, App, and Database tiers in a secure network container in Data Center 1 using service orchestration, simple and easy. Refer to the figure below for a topology picture.

  • SharePoint Web Tier is in a Public Zone, and uses a virtual firewall (VSG) and Citrix load balancer
  • SharePoint App Tier and Database Tier (SQL) are in a Protected Zone and use an ASA Firewall and Citrix load balancer
  • Our validated design provides LAN extensions, extended clusters, secure network containers, virtual switching, and storage replication between Metro sites

SharePoint is up and running in Data Center 1, supporting hundreds of users with secure connections. Now let’s move SharePoint to a new site without the users knowing it.

Blog-3-App-Container-v2

Step 1:    Perform Live SharePoint Migration to Data Center 2….while maintaining secure user connections!

We performed a Live vMotion of  SharePoint (Web, App, Database) to new hosts in Data Center 2, described in the figure below.  Data Center 2 is 75 km away. Our SharePoint migration had minimal disruption (2 seconds or less) and maintained security, stateful services, and all user connections across our multi-site Cloud. Pretty sweet!   A few highlights from our validated design are provided below.

  • Our virtual switch (Nexus 1000v), virtual firewall (VSG), and UCS automatically updated Port and Security Profiles at the new site, so our virtual switching and application firewalls were preserved without lifting a finger.
  • Layer 2 Extensions permit tromboning back to Data Center 1 to maintain connections to physical appliances (stateful firewalls and  load balancers), also without manual intervention.
  • Our Network Container was automatically extended between Metro sites, maintaining security, tenancy, QoS, IP addressing, and user connections.  SharePoint was discovered on the new host in Data Center 2 within seconds, using this extended Network Container.

Now let’s move the rest of the network container to Data Center 2 in less than one second!

Blog-3-App-Move-v2

Step 2:      Redirect users to a new Network Container in Data Center 2….in less than 1 second!

With the aid of service orchestration, we simply created a new network container in Data Center 2. This new container included the same configuration, connections, and services (firewalls, load balancers) as the original container in Data Center 1.  Once created, we simply redirected external users to the SharePoint application running in Data Center 2, as described below.  The redirection of users happened in less than one second, pretty amazing. A simple routing update delivered through service orchestration performed the redirection. In this step, user connections were broken and new connections were re-established to the already running SharePoint application in less than one second!   A few highlights from our validated design are provided below.

  • Layer 2 Extensions allowed the preservation of IP Addressing for Apps and Services during migration.  There is no need to “re-IP” your applications just because they’ve moved to a different city.
  • The complete Network Container including physical and virtual resources was moved  with minimal disruption (sub-second) to users
  • Our Multi-site Cloud solution supports a typical application environment, including both physical and virtual resources, with scaling for large and small private clouds
  • We also support Cold workload moves of less critical workloads that don’t require these stringent stateful requirements.

Blog-3-Container-Move-v2

For More Info:

We encourage you to follow my blog series and check out our new business continuity and workload mobility solution (VMDC DCI), which describes key business drivers, Cisco DCI innovations, and validated designs that our customers are deploying in their private clouds.

Deploy with confidence! (and sleep better knowing your Cloud is more reliable and secure)

  • CVD Design Guide -- Cisco Business Continuity and Workload Mobility solution (VMDC DCI )
  • Solution Overview -- Cisco Business Continuity and Workload Mobility solution (VMDC DCI)
  • BrightTalk Session -- VMDC DCI for Business Continuity and Workload Mobility in the Private Cloud (webcast)

In the same blog series:

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