AptiraOpenStack Architecture

and Monitoring

Indian Openstack users group 5th May 2012

● Explain OpenStack Swift Architecture● Look at key components to be monitored● Look at various options available that work

today

Agenda

– Diagram

OpenStack Architecture

• Proxy Server

• The Ring

• The Object Server/Storage nodes

• Account Server

• Replication

• Updaters and Auditors

Swift Components

● Hardware failure

● Operating System failure

● Swift Cluster health

● Swift Cluster telemetry

What to monitor?

● Hard drive failure detection in Swift

Use swift-drive-audit

•Other Common metrics like

• CPU usage

• RAM usage

• Network usage etc.

Hardware Failure and Operating Systems

● Use swift-dispersion-report tool

Based on config file /etc/swift/dispersion.conf

OpenStack Swift Cluster health monitoring

● swift-recon middleware

The Swift Recon middleware can provide general machine stats (load average, socket stats, /proc/meminfo contents, etc.) as well as Swift-specific metrics:

The MD5 sum of each ring file.

The most recent object replication time.

Count of each type of quarantined file: account, container, or object.

Count of “async_pendings” (deferred container updates) on disk.

Cluster Telemetry and Monitoring

Config section to be added in object-server.conf

Following information available

Swift-Recon

● A lot of development going on around OpenStack in the community. Existing enterprise grade systems have written modules for OpenStack

● Nagios

● Zenoss

What works today?

● Nagios Exchange Addon check_swift

– http://exchange.nagios.org/directory/Plugins/Clustering-and-High-2DAvailability/check_swift/details

● The components

– check_swift : tries to upload, download and delete a file in a Swift container to check that it works correctly

– check_swift_dispersion: uses swift-dispersion tools to report dispersion analysis and checks that all copies of objects are OK

– check_swift_object_servers : uses swift-recon to query all clusters servers and ensure they all have the same copy of the object ring.

● Compatible with Nagios 3.x

What works today?

● Zenoss Zen Pack Open Stack Swift

– https://github.com/zenoss/ZenPacks.zenoss.OpenStackSwift

● All of the monitoring currently performance is done through the optional swift-recon API endpoint that can be enabled on all of your Swift object servers. Before using this ZenPack you must install and configure swift-recon on your Swift object servers.

● Compatible with versions 3.2 to 4.0

What works today?

The End

Questions?