sardina€¦ · title: sdn-presentation-openstack-summit-uoe-eleanor-cloud-20180517 created date:...
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Sardina Systems Proprietary. Copyright (C) 2014 -- 2018. Sardina Systems. All rights reserved.
S A R D I N A
The road to OpenStack at (one of?) UK’s largest academic private cloud: University of Edinburgh
Jan Winter [email protected] +44 131 650 5009
Kenneth Tan [email protected] +44 798 941 7838
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1. Who?
!2
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Sardina Systems Proprietary. Copyright (C) 2014 -- 2018. Sardina Systems. All rights reserved.
University of Edinburgh
one of the leading universities in the world, amongst top 6 in the UK
ranked #6 or #7 in Europe, depending on whom you ask
founded a little while ago … in 1582 (older than some countries!)
population: ca. 45k (undergraduate + postgraduate students, admin staff, academic staff)
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Sardina Systems Proprietary. Copyright (C) 2014 -- 2018. Sardina Systems. All rights reserved.
University of Edinburgh
Research Services, IT Infrastructure Division: part of University’s central Information Services
Responsible for operating university-wide IT infrastructure / services for research
Research Services: 10 people (yes, only! and I am 10%!)
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2. Strategy and objective
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Sardina Systems Proprietary. Copyright (C) 2014 -- 2018. Sardina Systems. All rights reserved.
Strategy
move higher cost services delivery channels to lower cost delivery channels
automation + self-service: lower cost and increase speed of response and lesser errors
enable higher value HR, deliver higher value services
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Cloud objective
provide flexible infrastructure of compute, storage, network, services for research
… enable higher value HR, deliver higher value services
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Sardina Systems Proprietary. Copyright (C) 2014 -- 2018. Sardina Systems. All rights reserved.
3. Where is OpenStack in this picture?
!8
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Sardina Systems Proprietary. Copyright (C) 2014 -- 2018. Sardina Systems. All rights reserved.
Role of OpenStack
provide users with flexible, self-serviced provisioned of computing infrastructure
compute, storage, networking, applications portfolio
OpenStack should not result in net increase of workload for Research Services operations team
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Sardina Systems Proprietary. Copyright (C) 2014 -- 2018. Sardina Systems. All rights reserved.
Role of OpenStack
serve disparate user groups, varying and competing needs, long-lived and short-lived workloads
hpc/technical computing workload, eg: CERN, particle physics
data science workload: hadoop, spark
cannot make assumption about users’ level of technical expertise
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more importantly …
need to meet organization mission
don’t throw money at the challenge
money does not grow on trees
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4. The partner (not in crime!)
!12
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Sardina Systems
European cloud platform software vendor with presence in Slovakia, Romania, Russia, UK
technical team’s expertise in large scale, business and operations critical facilities in finance, defense, government, meteorology and automotive industries
OpenStack Foundation Corporate Sponsor
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5. The solution
!14
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Route to the solution
problem definition and solution design
system architecture
hardware specification
project management: what’s happening when, by who
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Route to the solution
plan for production from day 0
build for production from day 0
it’s not a toy: high availability is not optional
monkey-capable no-magic scaling up process
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Route to the solution
not a guinea pig!
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… to consider full lifecycle
deploy
operate
upgrade
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6. The solution design
!19
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The solution design
management: 16 nodes
storage: 9 ceph nodes
compute: ca. 200+ nodes (design size; varies from 50+, can dynamically add using other servers in the farm)
network: 5 VLANs, 10 GbE
integrates with broader University IT services
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7. Deploy phase
!21
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From design to deployment
the ingredients: what’s the configuration needed
ingredients ready: make sure hardware are available (servers, storage, networking)
system configuration: single source of truth at all times
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Automate, Automate, Automate
system configuration = input for automation
deployment of entire system: fully automated
reduced project risk = increased operational confidence
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Automate, Automate, Automate
base OS deployment with Foreman
post OS deployment configuration with SaltStack
full OpenStack + Ceph deployment with FishOS Deployer (SaltStack variant)
principle: standard enterprise tools, nothing fancy!
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Deploy: 1, 2, 3 … showtime
1. input: configuration and inventory
2. run deployer
3. 2 cups of coffee
… done
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8. Concept to reality
!26
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Deployer
pre-tested and proven off-site
ci/cd process
no knowledge of OpenStack necessary
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Implementation: proof of solution
detailed planning: what is to be done when, what will be available when, who will do what by when?
time from zero-to-operation: 8 weeks (and 6 weeks waiting for storage hardware to arrive)
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9. Upgrade phase
!29
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Run at all times
n to n+1 upgrade every 6 months (releases eol in 12 months)
2n upgrades in n years: more risky option
it’s not a toy!
system has to continue operation at all times
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Zero-downtime?
get solution architecture right (from deploy phase) … else, find out problem 6 months later
monkey-capable fully automated upgrade process
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10. The operate phase
!32
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Challenges
uptime + availability
resource management
infrastructure-as-code operation
idempotent: flexible to change at any time
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Reliability, Uptime, Availability
high availability: not an luxury
service consumers only interested in availability + reliability
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Downtime
any time any service is not available to service consumer, whatever the cause may be
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Downtime during operate phase
intrinsic — vs — extrinsic
downtime risks
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Downtime during operate phase
intrinsic — vs — extrinsic
downtime risks
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Extrinsic downtime risk
dealt with via highly available solution architecture
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What is OpenStack?
a series of intercommunicating services
HTTP, MQ, DB
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The types of services
1. with data + configuration
2. configuration only
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Safeguards: data
replication, replication, replication
2-node model or quorum/odd-node model
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Safeguards: data
traditional high availability operations model
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http services
http: it’s a web server! let’s treat it as such!
high availability for web servers
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What else? … mq
mq: put stuff in queue, take stuff from queue
replicate reader/writer
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in short, for extrinsic downtime risks …
keep extra copy available at all times
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Smarts …
it’s in the solution architecture
get it right, else it can come back to bite you!
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Other requirements for production
usage accounting and billing
log + metrics management
monitoring
capacity planning
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11. Problems encountered
!48
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Problems encountered
downtime due to running out of disk space, affecting ceilometer, mq
networking hardware problem (being investigated), resulting in packet loss
cinder problem encountered during Ocata upgrade
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12. Nearly 2 years later …
!50
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Worked well, growing
system expansions (storage and compute)
easily add compute nodes as necessary
growing by another ca. 2000 cores in coming weeks
system can be supported by just 1 person
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13. Key lessons learnt?!
!52
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Sardina Systems Proprietary. Copyright (C) 2014 -- 2018. Sardina Systems. All rights reserved.
Key lessons learnt
1. didn’t spin own Linux distribution, so don’t spin own OpenStack either
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Sardina Systems Proprietary. Copyright (C) 2014 -- 2018. Sardina Systems. All rights reserved.
Key lessons learnt
2. not planning, planning, planning … but rather … experience + planning, experience + planning, and more experience + planning
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Sardina Systems Proprietary. Copyright (C) 2014 -- 2018. Sardina Systems. All rights reserved.
Key lessons learnt
3. make sure your vendor is able to support your operation when needed
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Sardina Systems Proprietary. Copyright (C) 2014 -- 2018. Sardina Systems. All rights reserved.
S A R D I N A
Location: Ukraine
The road to OpenStack at (one of?) UK’s largest academic private cloud: University of Edinburgh
Jan Winter [email protected] +44 131 650 5009
Kenneth Tan [email protected] +44 798 941 7838
edinburgh.ac.uk | sardinasystems.com