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Deploying kubernetes at scale on OpenStack
Kubernetes is an open-source platform for automating deployment, scaling, and operations of containerized applications across clusters of hosts, providing container-centric infrastructure. When deploying Kubernetes at scale on OpenStack, key considerations include storage and networking options, upgrading strategies, and services to provide for monitoring, logging, and security. Rackspace offers a fully managed Kubernetes service on OpenStack that handles operations, upgrades, and integrates with other OpenStack services for security and quotas.
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Deploying kubernetes at scale on OpenStack
- 1. DEPLOYING KUBERNETES AT SCALEON OPENSTACK Victor Palma – OpenStack Architect
- 2. TONIGHT’S AGENDA What toconsider when deploying Kubernetes? OpenStack Components Network Considerations
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- 4. KUBERNETES IS __ •Kubernetes is an open-source “platform” for automating deployment, scaling, and operations of application containers across clusters of hosts, providing container-centric infrastructure. • portable: public, private, hybrid, multi- cloud • extensible: modular, pluggable, hook able, compassable • self-healing: auto-placement, auto- restart, auto- replication, auto-scaling
- 5. KUBERNETES HISTORY • Borg, Omegaand the Origin of Kubernetes • The name Kubernetes originates from Greek, meaning "helmsman" or "pilot", and is the root of "governor" and "cybernetic". • K8s is an abbreviation derived by replacing the 8 letters "ubernete" with 8.
- 6. MASTER COMPONENTS 6 API UI CLI etcd API ServerScheduler Controller
- 7. NODE COMPONENTS 7 Kubernetes Master Docker kubelet Daemonsets Kube-proxy fluentd Pod Pod PodAddons Pod Pod Pod Pod Pod Pod UIDNS Node
- 8. WHAT KIND OF EXPERIENCEDO YOU WANT TO PROVIDE?
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- 10. WHAT? • Self Healing •Auto Scaling • Rollout control • Resource Management • Service Discovery • Service Mesh • Federated
- 11. WHERE? • Public Clouds •Private Cloud
- 12. WHAT TO CONSIDER WHENDEPLOYING KUBERNETES
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- 14. STORAGE • Local Storage vs •Shared Storage
- 15. K8’S NETWORKING • Highly-coupled container-to-container communications • Pod-to-Pod communications •Pod-to-Service communications • External-to-Service communications
- 16. KUBERNETES NETWORKING ADDRESSES 16 •Cross-node pod-to-pod connectivity (east-west traffic) • Services running in the pods are discovered by other pods • Pod-to-Pod traffic is load balanced when consuming a service. • Expose Services for external Consumption (for north- south traffic). • Network Segmentation • Global load balancing via multi-cluster federation
- 17. KUBERNETES CNI PLUGINS 17 •ACI • Big Cloud Fabric • Calico • Cilium • Contiv • Contrail • Flannel • Kube-router • L2 + Linux Bridging • OpenVswitch • OVN • Weave net
- 18. LAYER 2 (SWITCHING) • Simple •Bridge CNI plug-in
- 19. LAYER 3 (ROUTING) • Scalable •CNI plug-in: BGP ‣ Calico ‣ Contiv ‣ etc
- 20. OVERLAY • Simple • CNIplug-in: (vxlan, encapusulation) ‣ Weave ‣ flannel
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- 22. DEPLOYMENT • Kubespray • Kops •Techtonic • etc.
- 23. TOP THINGS TOCONSIDER 23
- 24. ETCD • etcd ‣ SelfHosted ‣ Stand Alone Cluster
- 25. UPGRADE STRATEGY • OS Upgrades •Kubernetes Upgrades
- 26. SERVICES YOU PROVIDE • Monitoring ‣Prometheus • Alerting ‣ Grafana • Logging • RBAC
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- 29. SOMETIMES YOU CAN’TSTART FROM SCRATCH! 29
- 30. NOT BORN INTHE CLOUD! • UI Layer • Business Logic Tier Data Access Tier Integration Tier MainframeRDMS DB(s) • Monolithic Apps • Dependent on Heavy, stagnant tech • Configuration is embedded and static • Requires specific infrastructure and configuration • Inability to decompose deployments • Lack of portability
- 31. 31 OPENSTACK PROJECTS • CoreServices: ▸ NOVA – Compute ▸ NEUTRON – Networking ▸ SWIFT – Object Storage ▸ CINDER – Block Storage ▸ KEYSTONE – Identity ▸ GLANCE – Imaging Service •Optional Services: ▸Horizon – Dashboard ▸Octavia – Load balancing ▸Ceilometer – Telemetry ▸Heat – Orchestration ▸Trove – Database ▸Sahara – Elastic Map Reduce ▸Ironic – Bare-Metal Provisioning ▸Zaqar – Messaging Service ▸Manila – Shared FS ▸Designate – DNS Service ▸Barbican – Key Management ▸Magnum – Containers ▸Murano – App Catalog ▸Congress - Governance Core and Optional Services
- 32. 32 THE KUBERNETES CLUSTERAND THE SERVICES RUNNING INSIDE Hardware Image Registry Logging Monitoring Alerting RBAC Applications Operating Kubernetes Traditional RPC support on hardware, OpenStack, and Ceph. Deploy, configure and manage Kubernetes on OpenStack in a highly available way. We've done the work to integrate Kubernetes with OpenStack. Deploy, configure and manage per cluster services for your application. Kubernetes is a new technology so that means that you have to manage cluster operations, deployments, and Kubernetes best practices. Hardware
- 33. OpenStack New AlphaFeatures Changes in 1.9 KUBERNETES 33 • Block Storage (Cinder) V3 is now supported. • Load Balancer (Octavia) V2 is now supported, in addition to Neutron LBaaS V2. • Additional security group updates ‣ Kubernetes will now automatically determine the security group for the node ‣ Nodes can now belong to multiple security groups • Neutron LBaas V1 support has been removed. • Support for IPv6 • Alpha support for CoreDNS as a drop-in replacement for kube- dns • networking.k8s.io/v1 to replace extensions/v1beta1 NetworkPolicy API • Container Storage Interface (CSI) • Raw block volumes
- 34. RACKSPACE OFFERS MANAGED KUBERNETESFOR ENTERPRISE IT • Optimized for cost efficiency • Best-in-class compute • Kubernetes expertise from certified cloud specialists • Centralized logging and monitoring • Upgrades and patching • Isolated multi-tenant or single tenant • Security-hardened environments • Full turn-key solution with 1-click deployment • End-to-end tutorials and training • Native access to Kubernetes/Docker ecosystems • Unified GUI and tooling • Delivered via OpenStack • Full OpenStack integration • User management, identity, quotas and limits Operating Expertise Ease of Use Management Technology Integration Rackspace Managed Kubernetes 34 Fully Managed Kubernetes: Secure and highly performant with an intuitive user experience BETA AVAILABLE NOW!
- 36. Copyright © 2016Rackspace | Rackspace® Fanatical Support® and other Rackspace marks are either registered service marks or service marks of Rackspace US, Inc. in the United States and other countries. Features, benefits and pricing presented depend on system configuration and are subject to change without notice. Rackspace disclaims any representation, warranty or other legal commitment regarding its services except for those expressly stated in a Rackspace services agreement. All other trademarks, service marks, images, products and brands remain the sole property of their respective holders and do not imply endorsement or sponsorship. THANK YOU ONE FANATICAL PLACE | SAN ANTONIO, TX 78218 US SALES: 1-800-961-2888 | US SUPPORT: 1-800-961-4454 | WWW.RACKSPACE.COM