Observed Signal · Aug 19, 2026 · Technical Release · Source: DEV Community · Impact: 1/5 · Sentiment: Positive
Application Performance Monitoring Market: Deploying SigNoz with ClickHouse v25 and OTel Gotchas
A developer describes troubleshooting and deployment patterns for self-hosting SigNoz in 2026, focusing on ClickHouse v25 configuration changes, OpenTelemetry Collector incompatibilities, and Docker network isolation. Key recommendations include using config.d/users.d for ClickHouse overrides (instead of replacing the main config), enforcing a deterministic docker-compose boot sequence with one-shot migrator containers (signoz_init_clickhouse and signoz_telemetrystore_migrator), updating exporter names and image tags for the OTel collector (use signozclickhousemetrics and include the 'v' prefix), and relying on internal Docker network isolation rather than per-component passwords to simplify connectivity. The post emphasizes that maintaining self-hosted observability infrastructure requires ongoing engineering effort.
Practical, hands-on deployment guidance for SigNoz and ClickHouse v25 that matters to teams self-hosting observability but is not industry-shifting.
Key Takeaways & Evidence Grounding
- Author self-hosted SigNoz for Verne Software to control telemetry data.
- ClickHouse v25+ changes require using config.d/ and users.d/ for overrides instead of replacing the main config file.
- SigNoz deployments must run one-shot containers (signoz_init_clickhouse and signoz_telemetrystore_migrator) to install UDFs and create required databases before starting collectors.
- OpenTelemetry Collector changes include image-tag naming (require 'v' prefix), the exporter rename from clickhousemetricswrite to signozclickhousemetrics, and removal of some CLI flags that cause crashes.
- Author recommends Docker network-level isolation (passwordless internal DSNs) and allowing anonymous ZooKeeper in private networks to avoid authentication and interpolation issues.
Connected Companies & Entities
3 Entities mappedSigNoz
Open-source observability and APM platform for engineering teams.
“The entire SigNoz stack lives inside an isolated Docker network (`verne_observability`)....”
Docker
Subscription developer platform for containers, cloud builds and security.
“The entire SigNoz stack lives inside an isolated Docker network (`verne_observability`)....”
ClickHouse
Open-source analytics database with managed cloud and observability.
“With ClickHouse 25.5.6, the configuration paradigm has shifted....”
Ontology Mapping & Concepts
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