Snapshot the full Micrometer registry (cameleer business metrics, alerting
metrics, and Spring Boot Actuator defaults) every 60s into a new
server_metrics table so server health survives restarts without an external
Prometheus. Includes a dashboard-builder reference for the SaaS team.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Two-layer fix for the TZ drift that caused stats reads to miss every row
when the JVM default TZ and CH session TZ disagreed:
- Insert side: ClickHouse JDBC 0.9.7 formats java.sql.Timestamp via
Timestamp.toString(), which uses JVM default TZ. A CEST JVM shipping
to a UTC CH server stored Unix timestamps off by the TZ offset (the
triage report's original symptom). Pinned JVM default to UTC in
CameleerServerApplication.main() — standard practice for observability
servers that push to time-series stores.
- Read side: stats_1m_* tables now declare bucket as DateTime('UTC'),
MV SELECTs wrap toStartOfMinute(start_time) in toDateTime(..., 'UTC')
so projections match column type, and ClickHouseStatsStore.lit(Instant)
emits toDateTime('...', 'UTC') rather than a bare literal — defence
in depth against future refactors.
Test class pins its own JVM TZ (the store IT builds its own
HikariDataSource, bypassing the main() path). Debug scaffolding from
the triage investigation removed.
Greenfield CH — no migration needed.
Verified: 14/14 ClickHouseStatsStoreIT green, plus 84/84 across all
ClickHouse IT classes (no regression from the JVM TZ default change).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Same-millisecond rows were silently skipped between pages because the
log cursor had no tiebreak and the events cursor tied by instance_id
(which also collides when one instance emits multiple events within a
millisecond). Add an insert_id UUID (DEFAULT generateUUIDv4()) column
to both logs and agent_events, order by (timestamp, insert_id)
consistently, and encode the cursor as 'timestamp|insert_id'. Existing
data is materialized via ALTER TABLE MATERIALIZE COLUMN (one-time
background mutation).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Rename Java packages from com.cameleer3 to com.cameleer, module
directories from cameleer3-* to cameleer-*, and all references
throughout workflows, Dockerfiles, docs, migrations, and pom.xml.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
