Chapter 7. The application lifecycle: Accounting for constant change
This chapter covers
- Zero-downtime upgrades: blue/green and rolling
- Canaries
- Credential rotation patterns
- App lifecycle and troubleshooting
- Application health checks
The application lifecycle seems pretty basic: an app gets deployed, is started, is running for a bit, and is eventually shut down. Aside from the chaos that ensues when that “shutting down” part happens unexpectedly, this lifecycle is generally boring (or so we hope). Why, then, have an entire chapter dedicated to the topic?
Before I answer that question, let me first be clear on my definition of application lifecycle. The application lifecycle I cover here is distinctly different from the software development ...
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