#Elasticsearch

The personnel information system of the City Government of South Tangerang: employees keep their own records and follow their services, administrators work on exactly their part of the organisation, and every rule comes from the regulation that sets it. Led and built by me since 2023.

Four commands that move a stack from its old layout into a new structure across major versions: export without changing the source's data, import each store the way its version allows, verify what really arrived, and rename modules while moving their data along.

One command that rotates an environment's internal credentials key by key: a dry run by default, a backup first, a unique value for every key, a real login to prove each credential that can log in, and rollback for any that fail.

Three commands that back up a running Docker stack — PostgreSQL, MinIO, and Elasticsearch — without downtime, restore it to any point, and keep retention safe, with exit codes that say how much a failure matters.

Every project gets its own OpenTelemetry Collector, Elasticsearch and Kibana from one command, showing data on dashboards from the first start, by owning the data directory, starting services in the order they need, and keeping the official mappings on one node.

Its software reached the end of support, and its records must outlive it. One component rewrote data as it read it, so the migration copies rather than converts — an operation with no rollback has to be survivable, not merely careful.

Logs, traces and metrics from a dozen containers pushed over OTLP into one deliberately dumb collector, then read in Kibana — with a disk queue so a restart loses nothing, audit events counted exactly once, and the rule that telemetry must never become a failure point.

A Business Continuity Plan stated as two numbers — an RPO of six hours and an RTO of seconds for the data — and the few small scripts behind them: full and incremental backups, one technique per data store, restore as the only test that counts, and config treated as data.