Migrating a stateful monolith to PaaS
WHAT IT TESTS: cloud-native refactoring strategy. OUTLINE: externalize state to backing services, make processes stateless and disposable, read config from the environment per Twelve-Factor. RED FLAG: a lift-and-shift that keeps local-disk state.
WHAT IT TESTS: applying Twelve-Factor principles to remove statefulness. ANSWER OUTLINE: find every place the app writes local state, sessions, uploads, caches, logs, and move each to a backing service: object storage for files, a database or cache for sessions, a queue for jobs, stdout for logs. Make processes stateless and disposable so any instance serves any request and scales horizontally, and externalize config to environment variables. RED FLAG: a lift-and-shift that preserves local-disk dependence and long-lived instances.
Read the original → interview
- #twelve-factor
- #migration
- #cloud-native
- #stateless
- #monolith
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