Hyper-Converged Infrastructure
Article | September 14, 2023
Adopting DevOps and CD in IaaS environments is a strategic imperative for organizations seeking to achieve agility, competitiveness, and customer satisfaction in their software delivery processes.
Contents
1. Introduction
2. What is IaaS Virtualization?
3. Virtualization Techniques for DevOps and Continuous Delivery
4. Integration of IaaS with CI/CD Pipelines
5. Considerations in IaaS Virtualized Environments
5.1. CPU Swap Wait
5.2. CPU System/Wait Time for VKernel:
5.3. Memory Balloon
5.4.Memory Swap Rate:
5.5. Memory Usage:
5.6. Disk/Network Latency:
6. Industry tips for IaaS Virtualization Implementation
6.1. Infrastructure Testing
6.2. ApplicationTesting
6.3. Security Monitoring
6.4. Performance Monitoring
6.5. Cost Optimization
7. Conclusion
1. Introduction
Infrastructure as a Service (IaaS) virtualization presents significant advantages for organizations seeking to enhance their agility, flexibility, and speed to market within the DevOps and continuous delivery frameworks. Addressing the associated risks and challenges is crucial and can be achieved by employing the appropriate monitoring and testing techniques, enlisted further, in this blog.
IaaS virtualization allows organizations to provision and de-provision resources as needed, eliminating the need for long-term investments in hardware and data centers. Furthermore, IaaS virtualization offers the ability to operate with multiple operating systems, databases, and programming languages, empowering teams to select the tools and technologies that best suit their requirements.
However, organizations must implement comprehensive testing and monitoring strategies, ensure proper security and compliance controls, and adopt the best resource optimization and management practices to leverage the full potential of virtualized IaaS. To achieve high availability and fault tolerance along with advanced networking, enabling complex application architectures in IaaS virtualization, the blog mentions five industry tips.
2. What is IaaS Virtualization?
IaaS virtualization involves simultaneously running multiple operating systems with different configurations. To run virtual machines on a system, a software layer known as the virtual machine monitor (VMM) or hypervisor is required.
Virtualization in IaaS handles website hosting, application development and testing, disaster recovery, and data storage and backup. Startups and small businesses with limited IT resources and budgets can benefit greatly from virtualized IaaS, enabling them to provide the necessary infrastructure resources quickly and without significant capital expenditures.
Virtualized IaaS is a potent tool for businesses and organizations of all sizes, enabling greater infrastructure resource flexibility, scalability, and efficiency.
3. Virtualization Techniques for DevOps and Continuous Delivery
Virtualization is a vital part of the DevOps software stack. Virtualization in DevOps process allows teams to create, test, and implement code in simulated environments without wasting valuable computing resources. DevOps teams can use the virtual services for thorough testing, preventing bottlenecks that could slow down release time. It heavily relies on virtualization for building intricate cloud, API, and SOA systems. In addition, virtual machines benefit test-driven development (TDD) teams that prefer to begin their troubleshooting at the API level.
4. Integration of IaaS with CI/CD Pipelines
Continuous integration is a coding practice that frequently implements small code changes and checks them into a version control repository. This process not only packages software and database components but also automatically executes unit tests and other tests to provide developers with vital feedback on any potential breakages caused by code changes.
Continuous testing integrates automated tests into the CI/CD pipeline. For example, unit and functionality tests identify issues during continuous integration, while performance and security tests are executed after a build is delivered in continuous delivery. Continuous delivery is the process of automating the deployment of applications to one or more delivery environments.
IaaS provides access to computing resources through a virtual server instance, which replicates the capabilities of an on-premise data center. It also offers various services, including server space, security, load balancing, and additional bandwidth. In modern software development and deployment, it's common to integrate IaaS with CI/CD pipelines. This helps automate the creation and management of infrastructure using infrastructure-as-code (IAC) tools. Templates can be created to provision resources on the IaaS platform, ensuring consistency and meeting software requirements. Additionally, containerization technologies like Docker and Kubernetes can deploy applications on IaaS platforms.
5. Considerations in IaaS Virtualized Environments
5.1. CPU Swap Wait
The CPU swap wait is when the virtual system waits while the hypervisor swaps parts of the VM memory back in from the disk. This happens when the hypervisor needs to swap, which can be due to a lack of balloon drivers or a memory shortage. This can affect the application's response time. One can install the balloon driver and/or reduce the number of VMs on the physical machine to resolve this issue.
5.2. CPU System/Wait Time for VKernel
Virtualization systems often report CPU or wait time for the virtualization kernel used by each virtual machine to measure CPU resource overhead. While this metric can't be directly linked to response time, it can impact both ready and swap times if it increases significantly. If this occurs, it could indicate that the system is either misconfigured or overloaded, and reducing the number of VMs on the machine may be necessary.
5.3. Memory Balloon
Memory ballooning is a memory management technique used in virtualized IaaS environments. It works by injecting a software balloon into the VM's memory space. The balloon is designed to consume memory within the VM, causing it to request more memory from the hypervisor. As a result, if the host system is experiencing low memory, it will take memory from its virtual infrastructures, thus negatively affecting the guest's performance, causing swapping, reduced file-system buffers, and smaller system caches.
5.4. Memory Swap Rate
Memory swap rate is a performance metric used in virtualized IaaS environments to measure the amount of memory being swapped to disk. When the swap rate is high, it leads to longer CPU swap times and negatively affects application performance. In addition, when a VM is running, it may require more memory than is physically available on the server. In such cases, the hypervisor may use disk space as a temporary storage area for excess memory. Therefore, to optimize, it is important to ensure that VMs have sufficient memory resources allocated.
5.5. Memory Usage
Memory usage refers to the amount of memory being used by a VM at any given time. Memory usage is assessed by analyzing the host level, VM level, and granted memory. When memory usage exceeds the available physical memory on the server, the hypervisor may use disk space as a temporary storage area for excess memory, leading to performance issues. The disparity between used and granted memory indicates the overcommitment rate, which can be adjusted through ballooning.
5.6. Disk/Network Latency
Some virtualization providers provide integrated utilities for assessing the latency of disks and network interfaces utilized by a virtual machine. Since latency directly affects response time, increased latency at the hypervisor level will also impact the application. An excessive amount of latency indicates the system is overloaded and requires reconfiguration. These metrics enable us to monitor and detect any negative impact a virtualized system might have on our application.
6. Industry tips for IaaS Virtualization Implementation
Testing, compliance management and security arecritical aspects of managing virtualized IaaS environments . By implementing a comprehensive strategy, organizations ensure their infrastructure and applications' reliability, security, and performance.
6.1. Infrastructure Testing
This involves testing the infrastructure components of the IaaS environment, such as the virtual machines, networks, and storage, aiming to ensure the infrastructure is functioning correctly and that there are no performance bottlenecks, security vulnerabilities, or configuration issues. Testing the virtualized environment, storage testing (testing data replication and backup and recovery processes), and network testing are some of the techniques to be performed.
6.2. Application Testing
Applications running on the IaaS virtual environment should be thoroughly tested to ensure they perform as expected. This includes functional testing to ensure that the application meets its requirements and performance testing to ensure that the application can handle anticipated user loads.
6.3. Security Monitoring
Security monitoring is critical in IaaS environments, owing to the increased risks and threats. This involves monitoring the infrastructure and applications for potential security threats, vulnerabilities, or breaches. In addition, regular vulnerability assessments and penetration testing help identify and address potential security issues before they become significant problems.
6.4. Performance Monitoring
Performance monitoring is essential to ensuring that the underlying infrastructure meets performance expectations and has no performance bottlenecks. This comprises monitoring metrics such as CPU usage, memory usage, network traffic, and disk utilization. This information is used to identify performance issues and optimize resource usage.
6.5. Cost Optimization
Cost optimization is a critical aspect of a virtualized IaaS environment with optimized efficiency and resource allocation. Organizations reduce costs and optimize resource usage by identifying and monitoring usage patterns and optimizing elastic and scalable resources. It involves right-sizing resources, utilizing infrastructure automation, reserved instances, spot instances (unused compute capacity purchased at a discount), and optimizing storage usage.
7. Conclusion
IaaS virtualization has become a critical component of DevOps and continuous delivery practices. To rapidly develop, test, and deploy applications with greater agility and efficiency by providing on-demand access to scalable infrastructure resources to Devops teams, IaaS virtualization comes into picture. As DevOps teams continue to seek ways to streamline processes and improve efficiency, automation will play an increasingly important role. Automated deployment, testing, and monitoring processes will help reduce manual intervention and increase the speed and accuracy of development cycles. In addition, containers will offer a lightweight and flexible alternative to traditional virtualization, allowing DevOps teams to package applications and their dependencies into portable, self-contained units that can be easily moved between different environments. This can reduce the complexity of managing virtualized infrastructure environments and enable greater flexibility and scalability. By embracing these technologies and integrating them into their workflows, DevOps teams can achieve greater efficiency and accelerate their delivery of high-quality software products.
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Hyper-Converged Infrastructure
Article | July 13, 2023
IT infrastructure scaling is when the size and power of an IT system are scaled to accommodate changes in storage and workflow demands. Infrastructure scaling can be horizontal or vertical. Vertical scaling, or scaling up, adds more processing power and memory to a system, giving it an immediate boost. Horizontal scaling, or scaling out, adds more servers to the cloud, easing the bottleneck in the long run, but also adding more complexity to the system.
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Hyper-Converged Infrastructure
Article | October 3, 2023
With infrastructure as code (IaC), you write declarative instructions about compute, storage and network requirements for the infra and execute it. How does this compare to platform as code (PaC) and what did these two concepts develop in response to? In its simplest form, the tech stack of any application has three layers — the infra layer containing bare metal instances, virtual machines, networking, firewall, security etc.; the platform layer with the OS, runtime environment, development tools etc.; and the application layer which, of course, contains your application code and data. A typical operations team works on the provisioning, monitoring and management of the infra and platform layers, in addition to enabling the deployment of code.
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Application Infrastructure
Article | November 23, 2021
In my last blog in this series, we looked at the present state of 5G. Although it’s still early and it’s impossible to fully comprehend the potential impact of 5G use cases that haven’t been built yet, opportunities to monetize 5G with little additional investment are out there for network service providers (NSPs) who know where to look.
Now, it’s time to look toward the future. Anyone who’s been paying attention knows that 5G technology will be revolutionary across many industry use cases, but I’m not sure everyone understands just how revolutionary, and how quickly it will go down. According to Gartner®, “While 10% of CSPs in 2020 provided commercializable 5G services, which could achieve multiregional availability, this number will increase to 60% by 2024”.[i]
With so many recognizing the value of 5G and acting to capitalize on it, NSPs that fail to prepare for future 5G opportunities today are doing themselves and their enterprise customers a serious disservice. Preparing for a 5G future may seem daunting but working with a trusted interconnection partner like Equinix can help make it easier.
5G is so challenging for NSPs and their customers because it is so revolutionary. Mobile radio networks were built with consumer use cases in mind, which means the traffic from those networks is generally dumped straight to the internet. 5G is the first generation of wireless technology capable of supporting enterprise-class business applications, which means it’s also forcing many NSPs to consider alternatives to the public internet to support those applications.
User plane function breakout helps put traffic near the app
In my last article, I mentioned that one of the key steps mobile network operators (MNOs) could take to enable 5G monetization in the short term would be to bypass the public internet by enabling user traffic functions in the data center. This is certainly a step in the right direction, but to prepare themselves for future 5G and multicloud opportunities, they must go further by enabling user plane function (UPF) breakout.
The 5G opportunities of tomorrow will rely on wireless traffic residing as close as possible to business applications, to reduce the distance data must travel and keep latency as low as possible. This is a similar challenge to the one NSPs faced in the past with their wireline networks. To address that challenge, they typically deployed virtual network functions (VNFs) on their own equipment. This helped them get the network capabilities they needed, when and where they needed them, but it also required them to buy colocation capacity and figure out how to interconnect their VNFs with the rest of their digital infrastructure.
Instead, Equinix customers have the option to do UPF breakout with Equinix Metal®, our automated bare-metal-as-a-service offering, or Network Edge virtual network services on Platform Equinix®. Both options provide a simple, cost-effective way to get the edge infrastructure needed to support 5G business applications. Since both offerings are integrated with Equinix Fabric™, they allow NSPs to create secure software-defined interconnection with a rich ecosystem of partners. This streamlines the process of setting up hybrid deployments.
Working with Equinix can help make UPF breakout less daunting. Instead of investing massive amounts of money to create 5G-ready infrastructure everywhere they need it, they can take advantage of more than 235 Equinix International Business Exchange™ (IBX®) data centers spread across 65 metros in 27 countries on five continents. This allows them to shift from a potentially debilitating up-front CAPEX investment to an OPEX investment spread over time, making the economics around 5G infrastructure much more manageable.
Support MEC with a wide array of partners
Multiaccess edge compute (MEC) will play a key role in enabling advanced 5G use cases, but first enterprises need a digital infrastructure capable of supporting it. This gets more complicated when they need to modernize their infrastructure while maintaining existing application-level partnerships. To put it simply, NSPs and their enterprise customers need an infrastructure provider that can not only partner with them, but also partner with their partners.
With Equinix Metal, organizations can deploy the physical infrastructure they need to support MEC at software speed, while also supporting capabilities from a diverse array of partners. For instance, Equinix Metal provides support for Google Anthos, Amazon Elastic Container Service (ECS) Anywhere and Amazon Elastic Kubernetes Service (EKS) Anywhere. These are just a few examples of how Equinix interconnection offerings make it easier to collaborate with leading cloud providers to deploy MEC-driven applications.
Provision reliable network slicing in a matter of minutes
Network slicing is another important 5G capability that can help NSPs differentiate their offerings and unlock new business opportunities. On the surface, it sounds simple: slicing up network traffic into different classes of service, so that the most important traffic is optimized for factors such as high throughput, low latency and security. However, NSPs won’t always know exactly what slices their customers will want to send or where they’ll want to send them, making network slice mapping a serious challenge.
Preparing for a 5G future may seem daunting but working with a trusted interconnection partner like Equinix can help make it easier.”
Equinix Fabric offers a quicker, more cost-effective way to map network slices, with no need for cross connects to be set on the fly. With software-defined interconnection, the counterparty that receives the network slice essentially becomes an automated function that NSPs can easily control. This means NSPs can provision network slicing in a matter of minutes, not days, even when they don’t know who the counterparty is going to be. Service automation enabled by Equinix Fabric can be a critical element of an NSP’s multidomain orchestration architecture.
5G use case: Reimagining the live event experience
As part of the MEF 3.0 Proof of Concept showcase, Equinix partnered with Spectrum Enterprise, Adva, and Juniper Networks to create a proof of concept (PoC) for a differentiated live event experience. The PoC showed how event promoters such as minor league sports teams could ingest multiple video feeds into an AI/ML-driven GPU farm that lives in an Equinix facility, and then process those feeds to present fans with custom content on demand.
With the help of network slicing and high-performance MEC, fans can build their own unique experience of the event, looking at different camera angles or following a particular player throughout the game. Event promoters can offer this personalized experience even without access to the on-site data centers that are more common in major league sports venues.
DISH taps Equinix for digital infrastructure services in support of 5G rollout
As DISH looks to build out the first nationwide 5G network in the U.S., they will partner with Equinix to gain access to critical digital infrastructure services in our IBX data centers. This is a great example of how Equinix is equipped to help its NSP partners access the modern digital infrastructure needed to capitalize on 5G—today and into the future.
DISH is taking the lead in delivering on the promise of 5G in the U.S., and our partnership with Equinix will enable us to secure critical interconnections for a nationwide 5G network. With proximity to large population centers, as well as network and cloud density, Equinix is the right partner to connect our cloud-native 5G network.”
- Jeff McSchooler, DISH executive vice president of wireless network operations
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