Ch migration

[goldflag]

Summary by CodeRabbit

• Documentation

  • Added comprehensive migration guide including backup procedures, data transfer steps, restoration workflow, and integrity verification.

• New Features

  • Introduced self-contained ClickHouse Docker Compose setup for isolated migration testing without impacting existing infrastructure.

• Refactor

  • Parameterized ClickHouse host configuration to support environment variable overrides with sensible defaults.

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Project	Deployment	Preview	Comments	Updated (UTC)
rybbit	Ready	Preview	Comment	Nov 1, 2025 3:46am

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

Adds a ClickHouse migration guide with step-by-step backup and restore procedures. Introduces a standalone Docker Compose configuration for ClickHouse with inline configs for network, logging, and performance settings. Updates the cloud Docker Compose to parameterize the ClickHouse host environment variable.

Changes

Cohort / File(s)	Change Summary
ClickHouse Documentation clickhouse/MIGRATION.md	New comprehensive migration guide detailing backup procedures, data transfer, restoration steps, Docker Compose startup, and data verification workflows with estimated timeframes and local testing instructions
ClickHouse Docker Setup clickhouse/docker-compose.clickhouse.yml	New standalone Docker Compose file provisioning a ClickHouse server (v25.4.2) with external volume mounting, four inline configs for network/JSON/logging settings, healthcheck, port mappings, memory limits, and service restart policy
Cloud Configuration docker-compose.cloud.yml	Parameterized CLICKHOUSE_HOST environment variable from hardcoded value to ${CLICKHOUSE_HOST:-http://clickhouse:8123} with fallback default

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

• docker-compose.clickhouse.yml: Verify all four inline configs (network, json, logging, user_logging) have correct ClickHouse syntax and paths; validate resource limits, port mappings, and healthcheck configuration
• clickhouse/MIGRATION.md: Review procedural accuracy of backup/restore commands and Docker volume handling steps
• docker-compose.cloud.yml: Confirm environment variable parameterization maintains backward compatibility with existing deployments

Possibly related PRs

• Refactor ClickHouse configuration in Docker Compose files #543: Introduces the same four inline Docker configs (network, json, logging, user_logging) for ClickHouse with identical config mounting patterns in Docker Compose.

Poem

🐰 A ClickHouse migration, how grand!
With configs and volumes, we've helped you plan
From backup to restore, the steps flow clear
Docker Compose brings the server near
Data integrity checked with a cheer! 🎉

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch ch-migration

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between aa8b974 and 395dc9f.

📒 Files selected for processing (3)

• clickhouse/MIGRATION.md (1 hunks)
• clickhouse/docker-compose.clickhouse.yml (1 hunks)
• docker-compose.cloud.yml (1 hunks)

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