Data & streaming

redis-applier

DCDR

Custom Go consumer that reads redis-writes from local Kafka and applies into local Redis.

Quick facts

Image
nexus.apps.sub.comptech-lab.com/redis-applier:0.1.1
Size
16.9 MB (distroless)
Replicas
3/3 Ready (per cluster)
Pattern
Kafka WAL → Redis (ADR-0018)
Readiness fix in v0.1.1
kgo.OnPartitionsAssigned flips /readyz on group-join, not on first message

What it is

End-to-end DR test passed 2026-05-05: a write to DC Redis appeared in DR Redis after the MM2 hop and a redis-applier re-apply on the DR side, validating ADR-0018.

Architecture

Add diagrams or topology notes here — how this component sits relative to DC/DR, what replicates, and what speaks to it. Mermaid blocks render as plain text today; embed images under /assets/ when needed.

Configuration

Add chart values overrides, important env vars, OIDC client config, secret references. Link to the source files in infra/gitops-rke2 rather than copying YAML wholesale — the repo is the source of truth.

Operations

Add runbook notes: backup, restore, common troubleshooting, dashboards, on-call cheatsheet entries.

Failover

Add DC/DR cutover/cutback notes: edge HAProxy backend name, healthcheck path, measured cutover/cutback times, smoke-test commands.

References