当CACHE_STORE的db_number不为0,初始化失败

[lens077]

compose:

services:
  gorse:
    image: zhenghaoz/gorse-in-one
    restart: unless-stopped
    ports:
      - "8086:8086"   # gRPC
      - "8088:8088"   # HTTP: RESTful API + Dashboard
    environment:
      GORSE_CACHE_STORE: redis://default:xxx@xxx:6379/12

config.toml:

cache_store = "redis://default:xxx@xxx:6379/12"

错误:

{"level":"fatal","ts":1785579323.9302354,"msg":"failed to init database","error":"Cannot create index on db != 0","errorVerbose":"Cannot create index on db != 0\ngithub.com/gorse-io/gorse/storage/cache.(*Redis).Init:125: "}

docker inspect zhenghaoz/gorse-in-one

[
    {
        "Id": "sha256:b249a44b6affabde48a88c0438ebfd810edbb91f872f8dc080286f460a4f0ee7",
        "RepoTags": [
            "zhenghaoz/gorse-in-one:latest"
        ],
        "RepoDigests": [
            "zhenghaoz/gorse-in-one@sha256:b249a44b6affabde48a88c0438ebfd810edbb91f872f8dc080286f460a4f0ee7"
        ],
        "Comment": "buildkit.dockerfile.v0",
        "Created": "2026-07-14T22:26:54.841608021Z",
        "Config": {
            "Env": [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                "USER=root"
            ],
            "Entrypoint": [
                "/usr/bin/gorse-in-one",
                "-c",
                "/etc/gorse/config.toml"
            ]
        },
        "Architecture": "amd64",
        "Os": "linux",
        "Size": 104455283,
        "RootFS": {
            "Type": "layers",
            "Layers": [
                "sha256:f2ec4de84f559f5c7be4233b589cdbdbb5507807e05621b77320edd55a1f2a0f",
                "sha256:f081dce63793c674db57650b21c65bbc22be5d2ed6275ee4327fd7dd1f3b2efe",
                "sha256:6c4a31f4297410a8f52c8b52fdfe246e56f9b2f2af54fcf592ef384f4e364fa8",
                "sha256:cecc03c7b55fafffa248a9891a6d728ff403d3d17b30f5fbad8494995d97a6b4"
            ]
        },
        "Metadata": {
            "LastTagTime": "2026-08-01T10:08:26.14835021Z"
        },
        "Descriptor": {
            "mediaType": "application/vnd.oci.image.index.v1+json",
            "digest": "sha256:b249a44b6affabde48a88c0438ebfd810edbb91f872f8dc080286f460a4f0ee7",
            "size": 2364
        },
        "Identity": {
            "Pull": [
                {
                    "Repository": "docker.io/zhenghaoz/gorse-in-one"
                }
            ]
        }
    }
]

[zhangzhenghao]

Thanks for the report. This is a limitation of Redis Search rather than an issue with Redis URL parsing in Gorse.

Gorse uses Redis Search for cache score documents and creates an index with FT.CREATE during startup. Redis Search currently only supports indexes in logical database 0, so selecting database 12 causes Redis to return:

Cannot create index on db != 0

Please use database 0 for the Redis cache:

GORSE_CACHE_STORE: redis://default:***@xxx:6379/0

If multiple Gorse instances share the same Redis database, use a different GORSE_CACHE_TABLE_PREFIX for each instance to isolate their keys and indexes. If database 0 is unavailable, a separate Redis instance or another supported cache backend is currently required.

Redis Search has an open upstream change to support indexes in other logical databases, but it has not been merged or released yet: RediSearch/RediSearch#10175

We should also improve the Gorse configuration documentation and error message so that the database-0 requirement is clearer.