The Spring Boot actuator comes with nice features for Devops

1. SPRINGONE2GX
WASHINGTON, DC
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Spring Boot for DevOps
Nicolas Fränkel
@nicolas_frankel

2. @nicolas_frankel
Me, Myself and I
• By day
– hybris consultant
• By night
– Teacher/trainer
– Blogger
– Book author
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DevOps
• Devs and Ops collaboration?
• Treat your infrastructure as code?
• Automate everything?
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DevOps
• Meta-data
• Health checks
• Metrics
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A little story
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Spring Boot to the rescue
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Non-Functional Requirements
• Meta data
• 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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1. Meta data
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Meta data
• Which application?
– groupId
– applicationId
• Version
– From Maven
– From Git
• Anything!!!
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Demo time
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2. Health checks
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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
• DOWN
• UNKWOWN
• OUT_OF_SERVICE
– Possibly with details
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Health checks 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 checks
• Bean must implement
HealthIndicator
• Doesn’t use Dropwizard
HealthCheck
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Demo time
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3. Metrics
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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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jconsole
• JMX-compliant GUI for monitoring
JVM
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Demo time
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Dropwizard reporters
• (HTTP)
• (JMX)
• Graphite
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Graphite
• Store numeric time-series data
• Render graphs of this data on
demand
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Demo time
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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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Q&A
https://github.com/nfrankel/enhanced-pet-clinic
@nicolas_frankel
http://frankel.in/
http://blog.frankel.ch/
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