OpenNebulaConf2017EU: Hyper converged infrastructure with OpenNebula and Ceph by Armin Deliomini, Runtastic

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Hyperconvergence is one of the big topics in datacenters at the moment. But is it more than an old wine in new bottles? Why we at Runtastic built an hyperconverged datacenter based on Opennebula with Ceph and what we learned. YouTube: https://youtu.be/50Z4bmevTpg

Technology

Armin Deliomini
Webmaster
@ Runtastic
HCI with Opennebula

Runtastic Infrastructure
Virtualization
Linux KVM
Opennebula
3600 CPU cores
20TB memory
100TB storage
physical / hybrid
big
Base
Really a lot
opensource
Services TechnologiesCore DBs
3
Linux (Ubuntu)
SDN (Cisco)
Chef
Terraform
~ 30
microservices

3 systems for one goal
DC switches
managed by hand
Opennebula Enterprise Storage
NFS
Network Computing Storage

sad OPS is sad
• a lot of manual steps
• high scaling effort
• problematic config handover between systems
• error-prone

Hyper converged infrastructure
• virtualizes at least network, computing and storage (SDx)
• one interface to configure all the elements (one source of truth)
• scale out by adding nodes
• reduce possibility for human errors

Finding the pieces
Cisco ACI
SDN
Opennebula Ceph
SDS
Network Computing Storage

Software defined networking
Cisco ACI
• API driven
• Define Application groups and contracts between them
• ACI takes care about routing and ACLs
• VLAN as an identifier for the EPG
• every Microservice in an own EPG
• dedicated Haproxy as loadbalancer (the only interface to the outside)
• dedicated DBs (MongoDB, MySQL, Redis, Elasticsearch, …)
• synchronous applications servers (Jruby)
• asynchronous application workers

Software defined storage
Ceph
• distributed storage
• providing block storage, S3 compatible object store, file storage
• highly scaleable
• opensource
• currently on Jewel release

Software defined rest
Opennebula
• currently on 5.2 in production and 5.4 in office env
• HA solution based on corosync, pacemaker and drbd
• Ceph as a storage (some legacy DS on NFS)
• VLAN based networks
• contextualized images provided by packer

Hyper converged nodes
Ceph and KVM
• ~ 30 nodes (~60 “old fashioned” nodes)
• Ubuntu 16.04
• 32 - 72 CPU cores per node
• 256 - 512 GB memory
• 10G network uplink
• PXE booted with blue / green environments for updates
• Dedicate resources (CPU cores & memory) to Ceph
• 1x SSD for Ceph Journal
• 3x SAS disks for data

Additional info and contacts
Armin Deliomini -> ard@runtastic.com
Runtastic Tech blog -> http://techblog.runtastic.com/
Runtastic Github -> https://github.com/runtastic
Talk about Terraform -> https://youtu.be/sunlIQkFjJ8

In this talk, Rubén and Tino will lay our the novelties (not all of them, there are many!) present in 5.4, ranging from core new functionality to the big changes in vCenter. Also, the roadmap for 5.6 and future versions would be laid out, as far as it is consolidated (it won't be closed yet, but nearly so). It would also be the perfect session for feature requests, so don't miss it! YouTube: https://youtu.be/Czzm2EimayY

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OCCI (Open Cloud Computing Interface ) [1] is an open protocol for management tasks in the cloud environment focused on integration, portability and interoperability with a high degree of extensibility. It is designed to bridge differences between various cloud platforms (or cloud middleware) and provide common ground for users and developers alike. The rOCCI framework [2], originally developed by GWDG [3], was written to simplify the implementation of the OCCI 1.1 protocol in Ruby and later provided the base for a working client and server implementation targeting OpenNebula as its primary back-end cloud platform. The initial server-side implementation provided basic functionality and served as a proof of concept when it was adopted by the EGI Federated Cloud Task Force [4] and chosen to act as the designated VM management interface. This led to further funding from EGI-InSPIRE [5] and involvement of CESNET [6]. This talk aims to provide basic information about the OCCI protocol, introduce its implementation in rOCCI, describe and/or demonstrate some of the functionality provided by rOCCI client and rOCCI-server in concert with OpenNebula. It also briefly examines its use in the EGI FedCloud environment and explores the possibility of further integration with OpenNebula as a part of the ON ecosystem or even as an integral part of OpenNebula itself in the future. All this with interoperability in mind.

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