The Second Way - Create Telemetry to Enable Seeing and Solving Problems
13 important questions on The Second Way - Create Telemetry to Enable Seeing and Solving Problems
Where does telemetry have to be created?
- Within the application
- Deployment pipeline
- Pre-production environments
- Production environment
Which are according to 2015 State of Devops report are the top two technical practices to enable fast MTTR?
- Version controle
- Telemetry and proactive monitoring in the production environment.
What has to be part of the telemetry architecture?
- Data collection at the business logic, application and environment layer
- An event router responsible for storing our events and metrics.
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Name different logging levels.
- Debug level
- Info level (user driven or system specific)
- Warn level (conditions that could become an error)
- Error level (e.g. API call failures, internal error conditions)
- Fatal level (information to terminate)
What questions can be asked when solving a problem using the telemetry?
- What evidence do we have from our monitoring that a problem is actually occurring?
- What are the relevant events and changes in our application and environments that could have contributed to the problem?
- What hypothesis can we formulate to confirm the link between the proposed causes and effects?
- How can we prove which of these hypothesis are correct and succesfully effect a fix?
Name a few metric libraries for creating telemetry.
- StatsD (open source created by Etsy)
- JMX
- codahale metrics
- New relic
- Appdynamics
- Dynatrace
- Munin
- Collectd
What is information radiator?
Which values are demonstrated by putting information radiators in visible places?
- The team has nothing to hide from its visitors
- The team has nothing to hide from itself; it acknowledge and confronts problems.
From which levels do we need telemetry?
- Business level
- Application level
- Infrastructure level
- Client software level
- Deployment pipeline level
- overlaying information (e.g. Operational activities as downtime,)
Where are business metrics used for?
- For our acquisition funnel
- A/B testing
- Organizational goals e.g. revenue, user attainment, conversion rates
- high level business planning and operations
- analyzing customer usage.
Name a few infrastructure production tools?
At application level we generate telemetry for..
- Application health
- If organizational goals are achieved.
What's customer acquisition funnel?
This is where the business metrics are needed for.
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