spring io - spring boot for devops

Spring boot for devops

Nicolas Frankel@nicolas_frankel

Me, Myself and I

• Developer & Architect

– As Consultant

• Teacher/trainer

• Book Author

• Blogger

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Working for hybris

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DevOps

• Devs and Opscollaboration?

• Treat your infrastructure as code?

• Automate everything?

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DevOps

• Monitoring

• Metrics

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A little story

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Non-Functional Requirements

• Monitoring

–Health checks

–Metrics

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Non-Functional Requirements

• Configuration

– Beans

– Property values

– Controller mappings

– Etc.

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Enough talk, time for a demo

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Dropwizard Metrics

• A metrics model

• Exporters to backends

• And more…

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Simple metrics

• Gauge

– Simple value

• Counter

– Incrementable gauge

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Dropwizard reporters

• JMX

• Graphite

• (HTTP)

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jconsole

• JMX-compliant GUI for monitoring JVM

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Graphite

• Store numeric time-series data

• Render graphs of this data on demand

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For development

• Either define the 2 reporters

– Set @ConditionalOnMissingBean

– Use a "Development" profile

• Or define only the JMX reporter

– In production, use JMXTrans

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Metrics are not only technical

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Health checks

• A good way to monitor your application

• Each check wraps a dependency

– e.g. a datasource

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Health checks

• Each check returns an Health object

–Status UP or DOWN

– If not, possibly with details

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Health check endpoint

• /health aggregates all checks

• Health are objects

– Serialized in JSON

• If only one is down, the HTTP code is set to 5xx

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Health check

• Bean must implementHealthIndicator

• Doesn’t use DropwizardHealthCheck

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References

• Graphite Vagrant– https://github.com/tilmans/vagrant-statsd-graphite-

puppet

• Enhanced Spring Pet Clinic– https://github.com/nfrankel/enhanced-pet-clinic

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Q&A

• @nicolas_frankel

• http://blog.frankel.ch/

• https://leanpub.com/integrationtest/

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