regnete edited a comment on issue #74:
URL: https://github.com/apache/couchdb-docker/issues/74#issuecomment-644592838
@endyjasmi: Thank you for providing a working example.
I had to made some adjustments to get it working with couchdb 3.1.0. I wan't
to share this for others running in problems when setting up a couchdb 3
cluster with docker-compose. Hope, this is usefull for anybody out there.
1. explicitly set an erlang cookie on each node via ENV var. Cookie value
must be equal on all nodes. Otherwise you will get connection issues between
nodes (e.g. "Connection attempt from disallowed node")
```
server-0:
environment:
ERL_FLAGS: "-setcookie brumbrum"
```
2. Mount the `/opt/couchdb/etc/local.d` directory as volume to have it
persisted over `docker-compose down` and `docker-compose up -d`. Otherwise each
node will write new given COUCHDB_PASSWORD's hash on every `docker-compose up
-d` to /opt/couchdb/etc/local.d/docker.ini. In consequence the hashes for the
admin passwords differ between nodes and you are ending up with connection
issues between the nodes (e.g. 'no_majority').
```
server-0:
volumes:
- "data-couch-0:/opt/couchdb/data"
- "cfg-couch-0:/opt/couchdb/etc/local.d"
```
```
volumes:
data-couch-0:
cfg-couch-0:
data-couch-1:
cfg-couch-1:
data-couch-2:
cfg-couch-2:
```
3. No need to map Port 5886 to the public
Here is the complete content for a docker-compose.yml:
```
version: "3.5"
networks:
network:
services:
server-0:
environment:
COUCHDB_PASSWORD:
-pbkdf2-847043acc65626c8eb98da6d78682fbc493a1787,f7b1a3e4b624f4f0bbfe87e96841eda0,10
COUCHDB_SECRET: 0123456789abcdef0123456789abcdef
COUCHDB_USER: couchdb
NODENAME: couchdb-0.docker.com
ERL_FLAGS: "-setcookie brumbrum"
image: couchdb:3
networks:
network:
aliases:
- couchdb-0.docker.com
ports:
- "5984:5984"
volumes:
- "data-couch-0:/opt/couchdb/data"
- "cfg-couch-0:/opt/couchdb/etc/local.d"
server-1:
environment:
COUCHDB_PASSWORD:
-pbkdf2-847043acc65626c8eb98da6d78682fbc493a1787,f7b1a3e4b624f4f0bbfe87e96841eda0,10
COUCHDB_SECRET: 0123456789abcdef0123456789abcdef
COUCHDB_USER: couchdb
NODENAME: couchdb-1.docker.com
ERL_FLAGS: "-setcookie brumbrum"
image: couchdb:3
networks:
network:
aliases:
- couchdb-1.docker.com
ports:
- "15984:5984"
volumes:
- "data-couch-1:/opt/couchdb/data"
- "cfg-couch-1:/opt/couchdb/etc/local.d"
server-2:
environment:
COUCHDB_PASSWORD:
-pbkdf2-847043acc65626c8eb98da6d78682fbc493a1787,f7b1a3e4b624f4f0bbfe87e96841eda0,10
COUCHDB_SECRET: 0123456789abcdef0123456789abcdef
COUCHDB_USER: couchdb
NODENAME: couchdb-2.docker.com
ERL_FLAGS: "-setcookie brumbrum"
image: couchdb:3
networks:
network:
aliases:
- couchdb-2.docker.com
ports:
- "25984:5984"
volumes:
- "data-couch-2:/opt/couchdb/data"
- "cfg-couch-2:/opt/couchdb/etc/local.d"
volumes:
data-couch-0:
cfg-couch-0:
data-couch-1:
cfg-couch-1:
data-couch-2:
cfg-couch-2:
```
see https://github.com/regnete/howto-couchdb-cluster-docker-compose
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