A quick introduction to Trove, the Database-as-a-Service subsystem in OpenStack. Presented at Percona Live 2014.

1. HX111 OpenStack Database as a
Service
Version 12c1c1e
Copyright © 2014 hastexo Professional Services GmbH

2. An Introduction to
Database-as-a-
Service
HX111 OpenStack Database as a Service

3. FROM IAAS TO PAAS
"A step up the stack"
HX111.1 An Introduction to Database-as-a-Service

4. EVERYONE NEEDS A
DATABASE...
Well, almost everyone.
HX111.1 An Introduction to Database-as-a-Service

5. ... BUT DOES EVERYONE NEED
TO BUILD THEIR OWN?
• Platform/Distribution Support
• System Tuning Idiosyncrasies
• Flavors, Forks, Branches
HX111.1 An Introduction to Database-as-a-Service

6. WHAT'S SPECIAL ABOUT THE
CLOUD?
• Little to no control over infrastructure
• Everything is virtualized and orchestrated
• QoS is limited
HX111.1 An Introduction to Database-as-a-Service

7. ONE APPROACH
The DBA now becomes a cloud operator.
But that's rather undesirable.
HX111.1 An Introduction to Database-as-a-Service

8. THE ALTERNATIVE: DBAAS
Provides a database as a service
HX111.1 An Introduction to Database-as-a-Service

9. PRECEDENT: AMAZON RDS
Reliable Database Service: DBaaS for Amazon Web Services
HX111.1 An Introduction to Database-as-a-Service

10. An Introduction to
OpenStack Trove
HX111 OpenStack Database as a Service

11. MOTIVATION
Provide DBaaS within the OpenStack framework
HX111.2 An Introduction to OpenStack Trove

12. A BIT OF PROJECT HISTORY
• Originally named Reddwarf (alternatively RedDwarf)
• First public presentation at Percona Live 2012 by Brian
Aker
• Renamed Trove in 2013
HX111.2 An Introduction to OpenStack Trove

13. RELEASE HISTORY
• Incubated until Havana release (October 2013)
• Graduated shortly before Icehouse Summit
• Integrated in Icehouse release (April 2014)
HX111.2 An Introduction to OpenStack Trove

14. CONTRIBUTORS AND
SUPPORTERS
• Original project sponsor: Hewlett-Packard
• Current major backers: eBay, HP, Rackspace
• More than 75 individual contributors
• Current PTL: Michael Basnight, Rackspace
HX111.2 An Introduction to OpenStack Trove

15. Trove's Moving Parts
HX111 OpenStack Database as a Service

16. MULTIPLE MANAGEABLE PIECES
OpenStack Abhors A Monolith
HX111.3 Trove's Moving Parts

17. WHAT TROVE BUILDS UPON
• Keystone: authentication, authorization, access control
• Nova: compute
• Cinder: persistent storage
• Neutron or nova-network: networking
HX111.3 Trove's Moving Parts

18. WHAT TROVE CONSISTS OF
• trove-api: ReSTful API service
• trove-taskmanager: implements API service calls and
fires up guest
• trove-guestagent: configures guest for datastore use
HX111.3 Trove's Moving Parts

19. TROVE TERMINOLOGY
• Datastore
• Datastore version
• Instance
• Configuration Group
• Database
HX111.3 Trove's Moving Parts

20. DATASTORE
A specific RDBMS or NoSQL datastore that Trove can manage:
• MySQL
• MongoDB
• Cassandra
• ...
HX111.3 Trove's Moving Parts

21. DATASTORE VERSION
• Is linked to datastore
• Defines base image
• Defines sets of packages to be installed
HX111.3 Trove's Moving Parts

22. INSTANCE
• Is one incarnation of a datastore version
• Is managed by Nova and uses persistent volumes
managed in Cinder
• Runs a full OS plus trove-guestagent
HX111.3 Trove's Moving Parts

23. CONFIGURATION GROUP
• A set of configuration options you can set for an instance
• Enables admins to define and use best-practice
configurations for specific use cases
HX111.3 Trove's Moving Parts

24. DATABASES
• Several can run in one instance
• All database management is through OpenStack APIs
and trove-guestagent
HX111.3 Trove's Moving Parts

25. GETTING TROVE OPERATIONAL
• Install required OpenStack services
• Install Trove services
• Prepare an image
• Create a datastore
• Create a datastore version
HX111.3 Trove's Moving Parts

26. DEPLOYING TROVE
• Low maturity
• DevStack/Redstack
• Ubuntu packages in trusty (but not in Cloud Archive)
• Only client packages in RDO
• Puppet modules being worked on at eBay
HX111.3 Trove's Moving Parts

27. Working With Trove
HX111 OpenStack Database as a Service

28. GETTING STARTED
So we've installed Trove.
What's Next?
HX111.4 Working With Trove

29. LISTING DATASTORES
trove datastore -list
Lists currently configured datastores
HX111.4 Working With Trove

30. LISTING VERSIONS FOR A
DATASTORE
trove datastore -version -list <datastore -name>
Lists currently configured versions for a datastore
HX111.4 Working With Trove

31. GETTING DETAILS FOR A
DATASTORE VERSION
trove datastore -version -show
--datastore <name> <version -id>
HX111.4 Working With Trove

32. CREATING A DATASTORE
trove-manage datastore_update "<name >" ""
HX111.4 Working With Trove

33. CREATING A DATASTORE
VERSION
trove-manage datastore_version_update
"<name >"
"<versionname >"
"<type >"
"<imageid >"
"<packagelist >"
{0|1}
HX111.4 Working With Trove

34. SETTING A DEFAULT VERSION
FOR A DATASTORE
trove-manage datastore_update "<name >" "<versionname >"
HX111.4 Working With Trove

35. CREATING AN INSTANCE
trove create <instancename >
<flavor >
--size <size>
--datastore <name>
--datastore_version <versionname >
--nic net-id=<net-id>
HX111.4 Working With Trove

36. WHAT DOES TROVE CREATE DO?
• Allocate persistent storage space (through Cinder)
• Create a new guest (through Nova)
HX111.4 Working With Trove

37. WHAT HAPPENS WHEN THE
INSTANCE BOOTS?
• cloud-init (as always)
• trove-guestagent
HX111.4 Working With Trove

38. LISTING CONFIGURED
INSTANCES
trove list
HX111.4 Working With Trove

39. GETTING DETAILS FOR AN
INSTANCE
trove show <instanceid >
HX111.4 Working With Trove

40. LISTING DATABASES IN AN
INSTANCE
trove database -list <instanceid >
HX111.4 Working With Trove

41. CREATING A DATABASE
trove database -create <instanceid > <dbname >
HX111.4 Working With Trove

42. CREATING A USER AND
ENABLING DATABASE ACCESS
trove user-create
<instanceid >
<username >
<password >
[--host=<host >]
[--databases=<db1>,<db2>,...]
HX111.4 Working With Trove

43. GRANTING USER ACCESS
trove user-grant-access
<instanceid >
<username >
<password >
<db1>,<db2>,...
[--host=<host >]
HX111.4 Working With Trove

44. ENABLING ROOT ACCESS
trove root-enable
<instanceid >
HX111.4 Working With Trove

45. CONFIGURATION GROUPS
Configuration groups allow DBAs to set configuration options,
in bulk, on one or multiple databases
HX111.4 Working With Trove

46. CREATING A CONFIGURATION
GROUP
trove configuration -create <name>
'{ <values > }'
[--description <description >]
HX111.4 Working With Trove

47. SETTING PARAMETERS
Parameters are a JSON dictionary
{ "<key>": "<string >", "<key>": <int>, ... }
HX111.4 Working With Trove

48. LISTING SUPPORTED
CONFIGURATION PARAMETERS
trove configuration -parameter -list <datastore -version -id>
HX111.4 Working With Trove

49. ATTACHING A CONFIGURATION
GROUP TO AN INSTANCE
trove configuration -attach
<configuration -group-id> <instance -id>
HX111.4 Working With Trove

50. DETACHING A CONFIGURATION
GROUP FROM AN INSTANCE
trove configuration -detach <instance -id>
HX111.4 Working With Trove

51. MODIFYING A CONFIGURATION
GROUP ON THE FLY
trove configuration -patch
<configuration -group-id>
'{ <values > }'
HX111.4 Working With Trove

52. FINDING INSTANCES FOR A
CONFIGURATION GROUP
trove configuration -instances <configuration -group-id>
HX111.4 Working With Trove

53. DELETING A CONFIGURATION
GROUP
trove configuration -delete <configuration -group-id>
HX111.4 Working With Trove

54. Summary
HX111 OpenStack Database as a Service

55. WHAT YOU LEARNED TODAY
Why DBaas?
• A step up the stack
• Almost everyone needs a database
• Cloud shifts control over infrastructure away from DBA
HX111.5 Summary

56. WHAT YOU LEARNED TODAY
What's Trove?
• DBaaS within the OpenStack Framework
• Originally "Red Dwarf"
• Integrated for Icehouse
• Backed by HP, Rackspace, eBay, Tesora
HX111.5 Summary

57. WHAT YOU LEARNED TODAY
Trove's Moving Parts
• Builds on OpenStack Nova, Glance, Neutron, Cinder
• Contains API, task manager, guest agent
• Datastores, Versions, Instances, Databases
• Deployment Considerations
HX111.5 Summary

58. WHAT YOU LEARNED TODAY
Working with Trove
• Creating an instance
• Creating a database
• Assigning users and granting permissions
• Using configuration groups
HX111.5 Summary