Storage Requirements and Options for Running Spark on Kubernetes
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In a world of serverless computing users tend to be frugal when it comes to expenditure on compute, storage and other resources. Paying for the same when they aren’t in use becomes a significant factor. Offering Spark as service on cloud presents very unique challenges. Running Spark on Kubernetes presents a lot of challenges especially around storage and persistence. Spark workloads have very unique requirements of Storage for intermediate data, long time persistence, Share file system and requirements become very tight when it same need to be offered as a service for enterprise to mange GDPR and other compliance like ISO 27001 and HIPAA certifications. This talk covers challenges involved in providing Serverless Spark Clusters share the specific issues one can encounter when running large Kubernetes clusters in production especially covering the scenarios related to persistence. This talk will help people using Kubernetes or docker runtime in production and help them understand various storage options available and which is more suitable for running Spark workloads on Kubernetes and what more can be done
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Storage Requirements and Options for Running Spark on Kubernetes
- 1. Storage requirements for running Spark workloads on Kubernetes Rachit Arora rachitar@in.ibm.com IBM, India Software Labs
- 2. About Me • Advisory Software Engineer @ IBM India Software Labs • General Purpose Developer • Love Containers & Kubernetes • Conference traveler • Upcoming book on Hadoop and Its Ecosystem • Cricket fan, Foodie
- 3. Spark Unified, open source, parallel, data processing framework for Big Data Analytics Spark Core Engine Yarn Mesos Standalon e Scheduler Kubernete s Spark SQL Interactive Queries Spark Streaming Stream processing Spark MLlib Machine Learning GraphX Graph Computation
- 4. Typical Bigdata Application Secure Catalog and Search Ingest & Store Prepare Analyze Visualize Date Engineer Date Scientist Application Developer
- 5. Evolution of Spark Analytics On Prem Install • Acquire Hardware • Prepare Machine • Install Spark • Retry • Apply patches • security • Upgrades • Scale • High availability Virtualization • Prepare Vm Imaging Solution • Network Management • High Avilability • Patches • Scale Managed • Configure Cluster • Customize • Scale • Pay even if idle Serverless • Run analytics
- 6. What Kubernetes Bring in? • Kubernetes is an open-source system for automating deployment, scaling, and management of containerized applications. • It Manages Containers for me • It Manages High availability • It Provides me flexibility to choose resource I WANT and Persistence I want • Kubernetes – Lots of addon services: third-party logging, monitoring, and security tools • Reduced operational costs • Improved infrastructure utilization
- 8. Storage Requirements • Distributed File System • Local Scratch Space • Fast disk rights – DO NOT Write to Containers!! • User Library • Logs • History Server Events • Configs • Secrets
- 9. What can we leverage • Distributed • NFS • PV to PVC (1 to 1 Mapping in most of the Cloud Providers) • Big NFS – Multiple PV – qouta • HDFS – No Direct Support but can be configured to make it work but no data localization • DBFS – s3 based Databricks File System (DBFS) is a distributed file system • S3/Obect Storage – Performance concerns • Portworx – under exploration • Glusterfs
- 10. What can we leverage • Local temp dir scratch space • emptyDir • Clean Delete ? Need to return machines • HostPath • You manage delete • Logs • emptyDir vs NFS • Push to Object store using fluentd (side containers) • Roll over • Do not write to containers
- 11. What we are looking for? • Image as Volume • https://github.com/kubernetes/kubernetes /issues/831 • Flex Volume Plugin • CSI • Encrypted PVCs options – portworx • PV to PVC 1 to Many Mapping with Isolations • Config Map: Better support for updates • Local • Clean Delete for HIPAA • Distributed • Clean Delete for HIPAA • PVC transfer across Namespaces
- 12. References • IBM Watson Studio https://datascience.ibm.com • IBM Watson https://www.ibm.com/analytics/us/en/watson-data-platform/tutorial/ • Analytics Engine https://www.ibm.com/cloud/analytics-engine • Apache Spark • Kubernetes Scheduler Design & Discussion • Kuberenetes Clusters on IBM Cloud Rachit Arora rachitar@in.ibm.com @rachit1arora
- 13. Thank you Rachit Arora rachitar@in.ibm.com Twitter @rachit1arora
Editor's Notes
- Spark is an open source, scalable, massively parallel, in-memory execution engine for analytics applications. Think of it as an in-memory layer that sits above multiple data stores, where data can be loaded into memory and analyzed in parallel across a cluster. Spark Core: The foundation of Spark that lot of libraires for scheduling and basic I/O Spark offers over 100s of high-level operators that make it easy to build parallel apps. Spark also includes prebuilt machine-learning algorithms and graph analysis algorithms that are especially written to execute in parallel and in memory. It also supports interactive SQL processing of queries and real-time streaming analytics. As a result, you can write analytics applications in programming languages such as Java, Python, R and Scala. You can run Spark using its standalone cluster mode, on Cloud, on Hadoop YARN, on Apache Mesos, or on Kubernetes. Access data in HDFS, Cassandra, HBase, Hive, Object Store, and any Hadoop data source.
- Prepare Even though you have the right data, it may not be in the right format or structure for analysis. That’s where data preparation comes in. Data engineers need to bring raw data into one interface from wherever it lives – on premises, in the cloud or on your desktop – where it can then be shaped, transformed, explored, and prepared for analysis. Data scientist: Primarily responsible for building predictive analytic models and building insights. He will analyze data that’s been cataloged and prepared by the data engineer using machine learning tools like Watson Machine Learning. He will build applications using Jupyter Notebooks, RStudio After the data scientist shares his Analytical outputs , Application developer can build APPs like a cognitive chatbot. As the chatbot engages with customers, it will continuously improve its knowledge and help uncover new insights.
- As a data scientist what I was required to do On Prem to Virtuliation as demand increased in my organization for the sevrice I decided to move to virtualized VM to handle many request on demand but there still pain was more Then I decided to try services being offereed on cloud like EMR and IBM Analytics Engine or Microsoft Insights etce but there I need to order cluster sand configure them to suit my work loads Keep them running even when I do not want to use them Cover what is takes to install a hadoop/spark cluster
- IBM Watson brings together data management, data policies, data preparation, and analysis capabilities into a common framework. You can index, discover, control, and share data with Watson Knowledge Catalog, refine and prepare the data with Data Refinery, then organize resources to analyze the same data with Watson Studio. The IBM Watson apps are fully integrated to use the same user interface and framework. You can pick whichever apps and tools you need for your organization. Watson Studio (Watson Studio) provides you with the environment and tools to solve your business problems by collaboratively analyzing data What is Analytics Engine? You can use AE to Build and deploy clusters within minutes with simplified user experience, scalability, and reliability. You Custom configure the environment and Scale on demand.