Operate your application

Logs, metrics, health checks, troubleshooting, alerts, scaling and backups for apps real people use.

Modules in this path

1. 1. Observability basicsLogs, metrics and traces
   1. Logs, metrics and traces: which answers what Reading, 7 min
   2. The few signals worth watching Reading, 6 min
   3. Try it: a tour of your service's Logs, Metrics and Traffic tabs Reading, 8 min
   4. Check: observability Knowledge check, 5 min
   4 open
2. 2. LogsBuild, deploy and runtime logs
   1. Build, deploy and runtime logs Reading, 6 min
   2. Structured logging in your app Reading, 7 min
   3. Searching and streaming logs, including cron runs Video and reading, 10 min
   4. Lab: find the cause in the logs Verified lab, 25 min
   5. Check: logs Knowledge check, 5 min
   5 open
3. 3. MetricsCPU, memory, spherelets, saturation
   1. CPU, memory and spherelet count Reading, 7 min
   2. Spotting saturation Reading, 6 min
   3. Try it: load the sample and read the graphs Reading, 20 min
   4. Check: metrics Knowledge check, 5 min
   4 open
4. 4. Health checksReadiness, liveness and slow starts
   1. Readiness and liveness: what each protects Reading, 6 min
   2. A good health endpoint Reading, 7 min
   3. Slow starters and the restart loop Reading, 5 min
   4. Lab 6.L2: a health check that fits the app Verified lab, 20 min
   5. Check: health checks Knowledge check, 5 min
   5 open
5. 5. Troubleshooting playbookA repeatable order of checks
   1. A troubleshooting order that always works Video and reading, 12 min
   2. Failure gallery: wrong port, crash loop, out of memory, image pull, bad config Reading, 7 min
   3. Try it: five broken deploys Reading, 30 min
   4. Check: troubleshooting Knowledge check, 5 min
   4 open
6. 6. Monitoring and alertsRules, thresholds, notifications
   1. What deserves an alert Reading, 6 min
   2. Alert rules: CPU and memory, threshold, evaluation period, severity Reading, 7 min
   3. Where notifications go: in-app, email and webhooks Reading, 5 min
   4. Lab: create an alert Verified lab, 20 min
   5. Check: alerts Knowledge check, 5 min
   5 open
7. 7. ScalingBigger shapes, more spherelets, autoscaling
   1. Vertical scaling: bigger shapes Reading, 6 min
   2. Horizontal scaling: more spherelets Reading, 6 min
   3. Autoscaling on CPU: minimum, maximum, target Reading, 7 min
   4. Lab: scale out, then autoscale Verified lab, 25 min
   5. Check: scaling Knowledge check, 5 min
   5 open
8. 8. Backups and availabilitySnapshots, restores, zero-downtime
   1. Backups, snapshots and standby copies Reading, 7 min
   2. Availability: more than one spherelet, rolling updates Reading, 6 min
   3. Snapshots, daily schedules and restores Reading, 7 min
   4. Lab: back up and restore Verified lab, 25 min
   5. Check: backups and availability Knowledge check, 5 min
   5 open