fix(nouveau): Fixed server connector type

[amritkv]

Overview

While working with the docker images of couchdb and couchdb-nouveau, we encountered connector type errors. I've attached the error logs here :

From couchdb_container :

couchdb_container  | [error] 2026-04-01T11:28:02.955614Z nonode@nohost <0.548.0> -------- nouveau_index_manager: db:sw360db ddoc:_design/lucene index:projects failed with: {error,{connection_error,{protocol_error,'Invalid connection preface received. Appears to be an HTTP/1 response? (RFC7540 3.5)'}}}
couchdb_container  | [error] 2026-04-01T11:28:02.956357Z nonode@nohost <0.548.0> -------- nouveau_index_manager: db:sw360db ddoc:_design/lucene index:components failed with: {error,{connection_error,{protocol_error,'Invalid connection preface received. Appears to be an HTTP/1 response? (RFC7540 3.5)'}}}
couchdb_container  | [error] 2026-04-01T11:28:02.956767Z nonode@nohost <0.548.0> -------- nouveau_index_manager: db:sw360db ddoc:_design/lucene index:obligations failed with: {error,{connection_error,{protocol_error,'Invalid connection preface received. Appears to be an HTTP/1 response? (RFC7540 3.5)'}}}
couchdb_container  | [error] 2026-04-01T11:28:02.957136Z nonode@nohost <0.548.0> -------- nouveau_index_manager: db:sw360db ddoc:_design/lucene index:releases failed with: {error,{connection_error,{protocol_error,'Invalid connection preface received. Appears to be an HTTP/1 response? (RFC7540 3.5)'}}}

Then on the official documentation of couchdb-nouveau installation guide also, we found :

in nouveau.yaml you should remove all connectors of type h2c and add new ones using h2;

We found it mentions about h2c and h2 as connection type for the server, which is HTTP/2.

The default server mentions http which is version 1 and causing the issue as CouchDB is expecting HTTP/2.

Changing http to h2c in the nouveau.yaml for the image, the connection started working.

Here is the log from updated couchdb_nouveau_container with connector type as h2c

couchdb_nouveau_container  | INFO  [2026-04-01 11:31:50,320] org.eclipse.jetty.server.handler.ContextHandler: Started i.d.j.MutableServletContextHandler@4b862408{/,null,AVAILABLE}
couchdb_nouveau_container  | INFO  [2026-04-01 11:31:50,324] org.eclipse.jetty.server.AbstractConnector: Started application@3ffb3598{HTTP/1.1, (http/1.1, h2c)}{0.0.0.0:5987}
couchdb_nouveau_container  | INFO  [2026-04-01 11:31:50,325] org.eclipse.jetty.server.AbstractConnector: Started admin@4da9f723{HTTP/1.1, (http/1.1, h2c)}{0.0.0.0:5988}
couchdb_nouveau_container  | INFO  [2026-04-01 11:31:50,326] org.eclipse.jetty.server.Server: Started Server@3cbf1ba4{STARTING}[11.0.24,sto=30000] @1369ms

Checklist

• Code is written and works correctly;
• Changes are covered by tests;
• Documentation reflects the changes;

[GMishx]

CouchDB already updated this 9 months back for other package distributions.

apache/couchdb@2578b55#diff-a4af5fd22031f58c32fa731212c64c6b4a13f9b31246b236d3bef4d2461fe7b6R11

[GMishx]

\cc @rnewson @janl
What would be the best way to get this fix in the nouveau image?

[rnewson]

like that. thanks!