To be more independent, I decided to install four new VPX appliances (for the production and test environment) on vSphere and migrated the configuration from the appliances running on the physical SDX appliance.Īnother experience I had with load balancers was when I started to work for Citrix as a consultant in Central Europe and had to perform a migration of physical NetScaler MPX appliances, which had no integrated virtualization capability. It was also possible to download a VPX appliance, which could run on top of VMware vSphere. This meant, we had to plan changes and maintenance windows together and had to cross fingers, that their upgrade went well, so that we then could upgrade all our appliances after. Before I could upgrade to a specific firmware version, I also had to wait until they upgraded the physical NetScaler appliances and approved my change request. Since my virtual VPX appliances were hosted on the physical SDX appliance, I always relied on the network engineers when I needed more resources (CPU, RAM, SSL, throughput) allocated to my virtual instances. An HA pair was running in a active/passive mode and I had to maintain the same setup for the test environment as well. For a Citrix architecture it was best practices to have one high availability (HA) pair for the internal and one HA pair for the external (DMZ) network access. Today, you would call this multi-tenancy. The networking team had their dedicated NetScaler VPX instances (for LDAP and HTTP load balancing mostly) and deployed my appliances after I filed a change request. The networking team owned a few hardware-based appliances (NetScaler SDX) with integrated virtualization capability (XenServer as hypervisor) to host multiple virtual NetScaler (VPX) instances. My daily tasks included the maintenance and operation of the Citrix environment, which included physical and virtual Citrix NetScaler Application Delivery Controller (ADC) appliances. Do you want to build your private cloud like a hyperscaler is doing it? You know that VMware Cloud Foundation is becoming the new vSphere, but still wonder how you can implement software-defined load balancing (LB) or application services and features like autoscaling or predictive scaling? Then this article about multi-cloud load balancing and autoscaling with NSX Advanced Load Balancer aka Avi Networks is for you! My Experience with a Legacy ADCĪ few years ago, I was working on the customer side for an insurance company in Switzerland as a Citrix System Engineer.
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