Apache CouchDB stores data as JSON documents and exposes it through an HTTP API, so applications can read and update records using web-style requests. Its replication model helps keep databases synchronized, making it useful where data must be copied between systems. Applications still need to handle the consequences of concurrent changes and conflicts. On Kubernetes, the database files and cluster configuration must survive replacement of the containers running the service.
Deployment and operating notes
Apache CouchDB has a project-owned chart in apache/couchdb-helm, separate from the archived incubator package. The current chart README still warns that persistence must be configured for production. A StatefulSet does not by itself guarantee retained database files, and a demonstration command should not be treated as an authenticated production deployment.
Before migration, capture administrator credentials, cluster cookie and identity settings, node names, shard layout, database security objects and replication jobs. Back up and rehearse restoring the databases using a version-supported procedure. Compare the new chart’s claim names, service discovery and pod filesystem ownership before attaching any existing storage. Test document reads, writes, attachments, replication and conflict handling through the application API. Avoid exposing an unauthenticated database or relying on an ingress rule as the only access control. If changing server versions, follow CouchDB’s supported upgrade sequence; restoring the matching data and configuration may be necessary when a Helm rollback cannot reverse database-format changes.
Historical upstream link check · 2026-10-09
The recorded upstream address responded successfully (HTTP 200) on 2026-10-09. GitHub confirms that helm/charts is archived: this is a historical chart distribution, not evidence that the application itself is retired. Link availability does not certify the historical installation instructions or current security support.
Website availability is separate from project, chart and image support. Use the current guidance and primary sources on this page to assess the distribution.
Historical Kubedex content
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Apache CouchDB is a database featuring seamless multi-master sync, that scales from big data to mobile, with an intuitive HTTP/JSON API and designed for reliability.
This chart deploys a CouchDB cluster as a StatefulSet. It creates a ClusterIP Service in front of the Deployment for load balancing by default, but can also be configured to deploy other Service types or an Ingress Controller. The default persistence mechanism is simply the ephemeral local filesystem, but production deployments should set persistentVolume.enabled to true to attach storage volumes to each Pod in the Deployment.
ACID Semantics
CouchDB provides ACID semantics.[10] It does this by implementing a form of Multi-Version Concurrency Control, meaning that CouchDB can handle a high volume of concurrent readers and writers without conflict.
Built for Offline
CouchDB can replicate to devices (like smartphones) that can go offline and handle data sync for you when the device is back online.
Distributed Architecture with Replication
CouchDB was designed with bi-direction replication (or synchronization) and off-line operation in mind. That means multiple replicas can have their own copies of the same data, modify it, and then sync those changes at a later time.
Document Storage
CouchDB stores data as “documents”, as one or more field/value pairs expressed as JSON. Field values can be simple things like strings, numbers, or dates; but ordered lists and associative arrays can also be used. Every document in the CouchDB database has a unique id and there is no required document schema.
Eventual Consistency
CouchDB guarantees eventual consistency to be able to provide both availability and partition tolerance.
Map/Reduce Views and Indexes
The stored data is structured using views. In CouchDB, each view is constructed by a JavaScript function that acts as the
Map half of a map/reduce operation. The function takes a document and transforms it into a single value that it returns.
CouchDB can index views and keep those indexes updated as documents are added, removed, or updated.
HTTP API
All items have a unique URI that gets exposed via HTTP. It uses the HTTP methods POST, GET, PUT and DELETE for the four basic CRUD (Create, Read, Update, Delete) operations on all resources.
CouchDB also offers a built-in administration interface accessible via Web called Futon.
Sources & further reading
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