How service virtualization helps cloud computing: Key use circumstances


A number of weeks in the past, a buyer of the Broadcom Service Virtualization resolution posed the next query: “Now that we’re shifting to the cloud, will we nonetheless want Service Virtualization?” 

The query struck me as odd. My sense is that this confusion in all probability stemmed from the misperception that, since cloud environments might be spun up rapidly, folks suppose they will simply tackle take a look at setting bottlenecks and, within the course of, service virtualization capabilities can be rendered pointless. Clearly, that’s not the case in any respect! Having the ability to spin up infrastructure rapidly doesn’t tackle the problem of what components must be established with a purpose to make environments helpful for desired testing efforts. 

In truth, all of the use circumstances for the Service Virtualization resolution are simply as related within the cloud as they’re in conventional on-premises-based methods. Following are just a few key examples of those use circumstances: 

  1. Simplification of take a look at environments by simulating dependent finish factors   
  2. Assist for early, shift-left testing of utility parts in isolation 
  3. Assist for efficiency and reliability engineering 
  4. Assist for integration testing with complicated back-ends (like mainframes) or third-party methods
  5. Simplification of take a look at knowledge administration 
  6. Assist for coaching environments
  7. Assist for chaos and detrimental testing 

All of those use circumstances are documented intimately right here.  

Additional, what’s extra pertinent is that Service Virtualization helps to deal with many extra use circumstances which might be distinctive to cloud-based methods. 

Essentially, Service Virtualization and cloud capabilities complement one another. Mixed, Service Virtualization and cloud providers ship true utility growth and supply agility that might not be attainable with solely one in all these applied sciences. 

Utilizing digital providers deployed to an ephemeral take a look at setting within the cloud makes the setup of the setting quick, light-weight, and scalable. (Particularly in comparison with establishing a whole SAP implementation within the ephemeral cloud setting, for instance.) 

Let’s look at some key methods to make use of Service Virtualization for cloud computing. 

Service Virtualization Use Instances for Cloud Migration 

Cloud migration usually includes re-hosting, re-platforming, re-factoring, or re-architecting current methods. No matter the kind of migration, Service Virtualization performs a key position in practical, efficiency, and integration testing of migrated functions—and the use circumstances are the identical as these for on-premises functions. 

Nonetheless, there are a few particular use circumstances that stand out for Service Virtualization’s assist for cloud migration: 

  1. Early Pre-Migration Efficiency Verification and Proactive Efficiency Engineering 

Normally, migrating functions to the cloud will lead to efficiency adjustments, usually on account of variations in utility distribution and community traits. For instance, numerous utility parts could reside in numerous elements of a hybrid cloud implementation, or efficiency latencies could also be launched by way of distributed cloud methods. 

With Service Virtualization, we will simply simulate the efficiency of all of the totally different utility parts, together with their totally different response traits and latencies. Consequently, we will perceive the efficiency affect, together with each total and on the element degree, earlier than the migration is initiated.  

This permits us to deal with acceptable proactive efficiency engineering to make sure that efficiency objectives might be met put up migration.  

As well as, Service Virtualization performs a key position in efficiency testing throughout and after the migration, that are widespread, well-understood use circumstances. 

  1. Simpler Hybrid Check Surroundings Administration for Testing Throughout Migration 

That is an extension to the widespread use case of Service Virtualization, which is concentrated on simplifying testing environments. 

Nonetheless, throughout utility migration this testing turns into extra essential given the combination of various environments which might be concerned. Prospects usually migrate their functions or workloads to the cloud incrementally, moderately than suddenly. Which means take a look at environments throughout migration are way more difficult to arrange and handle. That’s as a result of assessments could span a number of environments, each cloud, for migrated functions—and on-premises—for pre-migration functions. In some circumstances, particular utility parts (resembling these residing on mainframes), will not be migrated in any respect. 

Many shoppers are impeded from early migration testing as a result of complexities of establishing take a look at environments throughout evolving hybrid methods. 

For instance, functions which might be being migrated to the cloud could have dependencies on different functions within the legacy setting. Testing of such functions requires entry to check environments for functions within the legacy setting, which can be tough to orchestrate utilizing steady integration/steady supply (CI/CD) instruments within the cloud. Through the use of Service Virtualization, it’s a lot simpler to handle and provision digital providers that symbolize legacy functions, whereas having them run within the native cloud testing setting of the migrated utility. 

Alternatively, previous to migration, functions working in legacy environments may have dependencies on functions which have been migrated to the cloud. In these circumstances, groups could not know the right way to arrange entry to the functions working in cloud environments. In lots of circumstances, there are safety challenges in enabling such entry. For instance, legacy functions could not have been re-wired for the improved safety protocols that apply to the cloud functions. 

Through the use of Service Virtualization, groups can provision digital providers that symbolize the migrated functions throughout the bounds of the legacy environments themselves, or in safe testing sandboxes on the cloud. 

As well as, Service Virtualization performs a key position in parallel migrations, that’s, when a number of functions which might be depending on one another are being migrated on the identical time. That is an extension of the important thing precept of agile parallel growth and testing, which is a widely known use case for Service Virtualization.

  1. Higher Assist for Utility Refactoring and Re-Architecting Throughout Migration 

Organizations make use of numerous utility re-factoring strategies as a part of their cloud migration. These generally embrace re-engineering to leverage microservices architectures and container-based packaging, that are each key approaches for cloud-native functions. 

Whatever the method used, all these refactoring efforts contain making adjustments to current functions. Provided that, these modifications require in depth testing. All the standard use circumstances of Service Virtualization apply to those testing efforts. 

For instance, the strangler sample is a well-liked re-factoring method that’s used to decompose a monolithic utility right into a microservices structure that’s extra scalable and higher suited to the cloud. On this state of affairs, testing approaches want to vary dramatically to leverage distributed computing ideas extra usually and microservices testing specifically. Service Virtualization is a key to enabling every kind of microservices testing. We are going to tackle intimately how Service Virtualization helps the wants of such cloud-native functions in part IV beneath.

  1. Alleviate Check Information Administration Challenges Throughout Migration 

In the entire above eventualities, using Service Virtualization additionally helps to vastly alleviate take a look at knowledge administration (TDM) issues. These issues are complicated in themselves, however they’re compounded throughout migrations. In truth, knowledge migration is likely one of the most intricate and time-consuming processes throughout cloud migration, which can make it tough to create and provision take a look at knowledge throughout the testing course of. 

For instance, knowledge that was as soon as simple to entry throughout functions in a legacy setting could not be obtainable to the migrated functions (or vice-versa) as a result of partitioning of knowledge storage. Additionally, the mechanism for synchronizing knowledge throughout knowledge shops could itself have modified. This usually requires extra cumbersome and laborious TDM work to arrange take a look at knowledge for integration testing—knowledge that will ultimately be thrown away put up migration. With Service Virtualization, you’ll be able to simulate parts and use artificial take a look at knowledge era in numerous elements of the cloud. This can be a a lot sooner and simpler technique to tackle  TDM issues. Groups additionally usually use knowledge virtualization at the side of Service Virtualization to deal with TDM necessities.  

Service Virtualization Use Instances for Hybrid Cloud Computing 

As soon as functions are migrated to the cloud, the entire basic use circumstances for Service Virtualization proceed to use. 

On this part, we are going to focus on among the key use circumstances for supporting hybrid cloud computing. 

  1. Assist for Hybrid Cloud Utility Testing and Check Environments 

Submit migration, many enterprises will function hybrid methods primarily based on a mixture of on-premises functions in personal clouds (resembling these working on mainframes), totally different public cloud methods (together with AWS, Azure, and Google Cloud Platform), and on numerous SaaS supplier environments (resembling Salesforce). See a simplified view within the determine beneath. 

Organising take a look at environments for these hybrid methods will proceed to be a problem. Establishing environments for integration testing throughout a number of clouds might be significantly tough. 

Service Virtualization clearly helps to virtualize these dependencies, however extra importantly, it makes digital providers simply obtainable to builders and testers, the place and after they want them. 

For instance, contemplate the determine above. Utility A is hosted on a non-public cloud, however depending on different functions, together with E, which is working in a SaaS setting, and J, which is working in a public cloud. Builders and testers for utility A rely upon digital providers created for E and J. For hybrid cloud environments, we additionally want to deal with the place the digital service can be hosted for various take a look at sorts, and the way they are going to be orchestrated throughout the totally different levels of the CI/CD pipeline. 

See determine beneath. 

Usually talking, throughout the CI course of, builders and testers wish to have light-weight artificial digital providers for E and J, and to have them created and hosted on the identical cloud as A. This minimizes the overhead concerned in multi-cloud orchestration. 

Nonetheless, as we transfer from left to proper within the CD lifecycle, we’d not solely need the digital providers for E and J to develop into progressively life like, but in addition hosted nearer to the distant environments, the place the “actual” dependent functions are hosted. And these providers would wish to orchestrate a multi-cloud CI/CD system. Service Virtualization frameworks would enable this by packaging digital providers into containers or digital machines (VMs) which might be acceptable for the setting they should run in. 

Notice that it’s fully attainable for utility groups to decide on to host the digital providers for the CD lifecycle on the identical host cloud as app A. Service Virtualization frameworks would enable that by mimicking the community latencies that come up from multi-cloud interactions. 

The important thing level is to emphasise that using Service Virtualization not solely simplifies take a look at setting administration throughout clouds, but in addition offers the pliability to deploy the digital service the place and when wanted. 

  1. Assist for Agile Check Environments in Cloud Pipelines 

Within the introduction, we mentioned how Service Virtualization enhances cloud capabilities. Whereas cloud providers make it sooner and simpler to provision and arrange on-demand environments, using Service Virtualization enhances that agility. With the answer, groups can rapidly deploy helpful utility property, resembling digital providers, into their environments. 

For instance, suppose our utility below take a look at has a dependency on a fancy utility like SAP, for which we have to arrange a take a look at occasion of the app. Provisioning a brand new take a look at setting within the cloud could take only some seconds, however deploying and configuring a take a look at set up of a fancy utility like SAP into that setting would take a very long time, impeding the group’s skill to check rapidly. As well as, groups would wish to arrange take a look at knowledge for the appliance, which might be complicated and useful resource intensive. By comparability, deploying a light-weight digital service that simulates a fancy app like SAP takes no time in any respect, thereby minimizing the testing impediments related to setting setup.    

  1. Assist for Scalable Check Environments in Cloud Pipelines

In cloud environments, digital service environments (VSEs) might be deployed as containers into Kubernetes clusters. This permits take a look at environments to scale robotically primarily based on testing demand by increasing the variety of digital service situations. That is helpful for efficiency and cargo testing, circumstances during which the load degree is progressively scaled up. In response, the take a look at setting internet hosting the digital providers may also robotically scale up to make sure constant efficiency response. This may additionally assist the digital service to imitate the conduct of an actual robotically scaling utility. 

Typically, it’s tough to dimension a efficiency testing setting for an utility in order that it appropriately mimics manufacturing. Robotically scaling take a look at environments could make this simpler. For extra particulars on this, please discuss with my earlier weblog on Steady Efficiency Testing of Microservices, which discusses the right way to do scaled element testing.  

  1. Assist for Cloud Price Discount 

Many research (resembling one completed by Cloud4C) have indicated that enterprises usually over-provision cloud infrastructure and a big proportion (about 30%) of cloud spending is wasted. This is because of numerous causes, together with the benefit of setting provisioning, idle sources, oversizing, and lack of oversight. 

Whereas manufacturing environments are extra carefully managed and monitored, this downside is seen very often in take a look at and different pre-production environments, which builders and groups are empowered to spin as much as promote agility. Most frequently, these environments are over-provisioned (or sized bigger than they must be), include knowledge that’s not helpful after a sure time (for instance, together with aged take a look at knowledge or out of date builds or take a look at logs), and never correctly cleaned up after their use—builders and testers like to rapidly transfer on the subsequent merchandise on their backlog! 

Use of Service Virtualization can assist to alleviate a few of this waste. As mentioned above, changing actual utility situations with digital providers helps to scale back the scale of the take a look at setting considerably. In comparison with complicated functions, digital providers are additionally simpler and sooner to deploy and undeploy, making it simpler for pipeline engineers to automate cleanup of their CI/CD pipeline scripts.  

In lots of circumstances, digital service situations could also be shared between a number of functions which might be depending on the identical finish level. Robotically scaling VSEs may also assist to restrict the preliminary dimension of take a look at environments. 

Lastly, VSEs to which precise digital providers are deployed, might be actively monitored to make sure monitoring, utilization, and de-provisioning when not used. 



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