Sequin Postgres Change Data Capture

This is a repackaged open source software product wherein additional charges apply for cloudimg support services.

## Capture Every Postgres Change Without Polling or Application Code

Sequin is an open source change data capture platform for PostgreSQL. It reads your database's write ahead log through a logical replication slot and turns every insert, update and delete into an ordered stream of change events, delivered exactly where you need them. Because it reads the replication log rather than polling tables, it captures every change without adding query load to your database and without requiring any application code to publish events.

## A Pipeline That Is Already Streaming On First Boot

Change data capture tools normally need connector configuration and supporting infrastructure before any data flows. This image instead ships a complete working pipeline. On first boot a source database is created with a captured table and a publication, a logical replication slot is pre created, and a sink streams every insert, update and delete into a stream. Write a row and read the captured change event back within seconds, then follow the same pattern to point Sequin at your own database.

## Supported Destinations

Change events can be delivered to Amazon SQS, Amazon SNS and Amazon Kinesis; to Kafka, NATS, RabbitMQ, Redis Streams, GCP Pub/Sub and Azure Event Hubs; to Elasticsearch, Typesense and Meilisearch; and to HTTP webhooks or a pull based API for consumers that prefer to fetch. Pipelines are built and monitored in a web console, or declared as YAML and applied at boot for infrastructure as code workflows.

## AWS Destinations

Sequin delivers change events natively to Amazon SQS, Amazon SNS and Amazon Kinesis, so you can drive event driven architectures with the AWS services you already run. The image deploys on EC2 with full control over instance sizing, storage and networking.

## Secure First Boot

Upstream Sequin ships a well known default administrator and allows open self registration. Both are disabled in this image. Instead, a one shot service generates on your instance's first boot, before anything is reachable, a database password, a cache password, an application secret key, an encryption vault key, an administrator password, a management API token, an HTTP Basic credential and a self signed TLS certificate carrying that instance's own address. The console sits behind two independent credentials and the management API behind a bearer token. An nginx front door terminates TLS and the console binds only to the loopback interface. No shared or default credential ships in the image.

## Application Stack

The Sequin server, an Elixir application built on the Phoenix framework, runs alongside a PostgreSQL instance and a Redis instance as pinned upstream containers on a private container network. Neither datastore is published to a host port.

## Dedicated Data Disk

The container image layers, the PostgreSQL data directory and write ahead log, the replication slot state and the Redis append only file all live on a separate, independently resizable data volume mounted by filesystem identifier, so capture state can grow without touching the root disk.

## Get Started

Subscribe, launch an instance, then read your unique credentials from /root/sequin-credentials.txt over SSH. The demonstration pipeline is already streaming by the time you sign in. From there, connect Sequin to your own PostgreSQL database and configure the sinks your workload needs.

## cloudimg Support

24/7 technical support by email and chat covering deployment, connecting Sequin to your own PostgreSQL database, configuring sinks and destinations, replication slot and publication management, TLS termination and upgrades.

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