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# 10.2.13. Configuration

The CouchDB Server Configuration API provide an interface to query and update the various configuration values within a running CouchDB instance.

## `/_config`

`GET` `/_config`

  Returns the entire CouchDB server configuration as a JSON structure. The structure is organized by different configuration sections, with individual values.

  Request Headers:

  - Accept –
    - application/json
    - text/plain

  Response Headers:

  - Content-Type –
    - application/json
    - text/plain; charset=utf-8

  Status Codes:

  - 200 OK – Request completed successfully
  - 401 Unauthorized – CouchDB Server Administrator privileges required

  Request

      GET /_config HTTP/1.1
      Accept: application/json
      Host: localhost:5984

  Response:

      HTTP/1.1 200 OK
      Cache-Control: must-revalidate
      Content-Length: 4148
      Content-Type: application/json
      Date: Sat, 10 Aug 2013 12:01:42 GMT
      Server: CouchDB (Erlang/OTP)

      {
        "attachments": {
            "compressible_types": "text/*, application/javascript, application/json,  application/xml",
            "compression_level": "8"
        },
        "couch_httpd_auth": {
            "auth_cache_size": "50",
            "authentication_db": "_users",
            "authentication_redirect": "/_utils/session.html",
            "require_valid_user": "false",
            "timeout": "600"
        },
        "couchdb": {
            "database_dir": "/var/lib/couchdb",
            "delayed_commits": "true",
            "max_attachment_chunk_size": "4294967296",
            "max_dbs_open": "100",
            "max_document_size": "4294967296",
            "os_process_timeout": "5000",
            "uri_file": "/var/lib/couchdb/couch.uri",
            "util_driver_dir": "/usr/lib64/couchdb/erlang/lib/couch-1.5.0/priv/lib",
            "view_index_dir": "/var/lib/couchdb"
        },
        "daemons": {
            "auth_cache": "{couch_auth_cache, start_link, []}",
            "db_update_notifier": "{couch_db_update_notifier_sup, start_link, []}",
            "external_manager": "{couch_external_manager, start_link, []}",
            "httpd": "{couch_httpd, start_link, []}",
            "query_servers": "{couch_query_servers, start_link, []}",
            "stats_aggregator": "{couch_stats_aggregator, start, []}",
            "stats_collector": "{couch_stats_collector, start, []}",
            "uuids": "{couch_uuids, start, []}",
            "view_manager": "{couch_view, start_link, []}"
        },
        "httpd": {
            "allow_jsonp": "false",
            "authentication_handlers": "{couch_httpd_oauth, oauth_authentication_handler}, {couch_httpd_auth, cookie_authentication_handler}, {couch_httpd_auth, default_authentication_handler}",
            "bind_address": "192.168.0.2",
            "default_handler": "{couch_httpd_db, handle_request}",
            "max_connections": "2048",
            "port": "5984",
            "secure_rewrites": "true",
            "vhost_global_handlers": "_utils, _uuids, _session, _oauth, _users"
        },
        "httpd_db_handlers": {
            "_changes": "{couch_httpd_db, handle_changes_req}",
            "_compact": "{couch_httpd_db, handle_compact_req}",
            "_design": "{couch_httpd_db, handle_design_req}",
            "_temp_view": "{couch_httpd_view, handle_temp_view_req}",
            "_view_cleanup": "{couch_httpd_db, handle_view_cleanup_req}"
        },
        "httpd_design_handlers": {
            "_info": "{couch_httpd_db,   handle_design_info_req}",
            "_list": "{couch_httpd_show, handle_view_list_req}",
            "_rewrite": "{couch_httpd_rewrite, handle_rewrite_req}",
            "_show": "{couch_httpd_show, handle_doc_show_req}",
            "_update": "{couch_httpd_show, handle_doc_update_req}",
            "_view": "{couch_httpd_view, handle_view_req}"
        },
        "httpd_global_handlers": {
            "/": "{couch_httpd_misc_handlers, handle_welcome_req, <<\"Welcome\">>}",
            "_active_tasks": "{couch_httpd_misc_handlers, handle_task_status_req}",
            "_all_dbs": "{couch_httpd_misc_handlers, handle_all_dbs_req}",
            "_config": "{couch_httpd_misc_handlers, handle_config_req}",
            "_log": "{couch_httpd_misc_handlers, handle_log_req}",
            "_oauth": "{couch_httpd_oauth, handle_oauth_req}",
            "_replicate": "{couch_httpd_misc_handlers, handle_replicate_req}",
            "_restart": "{couch_httpd_misc_handlers, handle_restart_req}",
            "_session": "{couch_httpd_auth, handle_session_req}",
            "_stats": "{couch_httpd_stats_handlers, handle_stats_req}",
            "_utils": "{couch_httpd_misc_handlers, handle_utils_dir_req, \"/usr/share/couchdb/www\"}",
            "_uuids": "{couch_httpd_misc_handlers, handle_uuids_req}",
            "favicon.ico": "{couch_httpd_misc_handlers, handle_favicon_req, \"/usr/share/couchdb/www\"}"
        },
        "log": {
            "file": "/var/log/couchdb/couch.log",
            "include_sasl": "true",
            "level": "info"
        },
        "query_server_config": {
            "reduce_limit": "true"
        },
        "query_servers": {
            "javascript": "/usr/bin/couchjs /usr/share/couchdb/server/main.js"
        },
        "replicator": {
            "max_http_pipeline_size": "10",
            "max_http_sessions": "10"
        },
        "stats": {
            "rate": "1000",
            "samples": "[0, 60, 300, 900]"
        },
        "uuids": {
            "algorithm": "utc_random"
        }
      }

## `/_config/section`

`GET` `/_config/{section}`

  Gets the configuration structure for a single section.

  Parameters:

  - section – Configuration section name

  Request Headers:

  - Accept –
    - application/json
    - text/plain

  Response Headers:

  - Content-Type –
    - application/json
    - text/plain; charset=utf-8

  Status Codes:

  - 200 OK – Request completed successfully
  - 401 Unauthorized – CouchDB Server Administrator privileges required

  Request:

      GET /_config/httpd HTTP/1.1
      Accept: application/json
      Host: localhost:5984

  Response:

      HTTP/1.1 200 OK
      Cache-Control: must-revalidate
      Content-Length: 444
      Content-Type: application/json
      Date: Sat, 10 Aug 2013 12:10:40 GMT
      Server: CouchDB (Erlang/OTP)

      {
          "allow_jsonp": "false",
          "authentication_handlers": "{couch_httpd_oauth, oauth_authentication_handler}, {couch_httpd_auth, cookie_authentication_handler}, {couch_httpd_auth, default_authentication_handler}",
          "bind_address": "127.0.0.1",
          "default_handler": "{couch_httpd_db, handle_request}",
          "enable_cors": "false",
          "log_max_chunk_size": "1000000",
          "port": "5984",
          "secure_rewrites": "true",
          "vhost_global_handlers": "_utils, _uuids, _session, _oauth, _users"
      }

## `/_config/section/key`

`GET` `/_config/{section}/{key}`

  Gets a single configuration value from within a specific configuration section.

  Parameters:

  - section – Configuration section name
  - key – Configuration option name

  Request Headers:

  - Accept –
    - application/json
    - text/plain

  Response Headers:

  - Content-Type –
    - application/json
    - text/plain; charset=utf-8

  Status Codes:

  - 200 OK – Request completed successfully
  - 401 Unauthorized – CouchDB Server Administrator privileges required

  Request:

      GET /_config/log/level HTTP/1.1
      Accept: application/json
      Host: localhost:5984

  Response:

      HTTP/1.1 200 OK
      Cache-Control: must-revalidate
      Content-Length: 8
      Content-Type: application/json
      Date: Sat, 10 Aug 2013 12:12:59 GMT
      Server: CouchDB (Erlang/OTP)

      "debug"

  Note

  The returned value will be the JSON of the value, which may be a string or numeric value, or an array or object. Some client environments may not parse simple strings or numeric values as valid JSON.

`PUT` `/_config/{section}/{key}`

  Updates a configuration value. The new value should be supplied in the request body in the corresponding JSON format. If you are setting a string value, you must supply a valid JSON string. In response CouchDB sends old value for target section key.

  Parameters:

  - section – Configuration section name
  - key – Configuration option name

  Request Headers:

  - Accept –
    - application/json
    - text/plain
  - Content-Type – application/json

  Response Headers:

  - Content-Type –
    - application/json
    - text/plain; charset=utf-8

  Status Codes:

  - 200 OK – Request completed successfully
  - 400 Bad Request – Invalid JSON request body
  - 401 Unauthorized – CouchDB Server Administrator privileges required
  - 500 Internal Server Error – Error setting configuration

  Request:

      PUT /_config/log/level HTTP/1.1
      Accept: application/json
      Content-Length: 7
      Content-Type: application/json
      Host: localhost:5984

      "info"

  Response:

      HTTP/1.1 200 OK
      Cache-Control: must-revalidate
      Content-Length: 8
      Content-Type: application/json
      Date: Sat, 10 Aug 2013 12:12:59 GMT
      Server: CouchDB (Erlang/OTP)

      "debug"

`DELETE` `/_config/{section}/{key}`

  Deletes a configuration value. The returned JSON will be the value of the configuration parameter before it was deleted.

  Parameters:

  - section – Configuration section name
  - key – Configuration option name

  Request Headers:

  - Accept –
    - application/json
    - text/plain

  Response Headers:

  - Content-Type –
    - application/json
    - text/plain; charset=utf-8

  Status Codes:

  - 200 OK – Request completed successfully
  - 401 Unauthorized – CouchDB Server Administrator privileges required
  - 404 Not Found – Specified configuration option not found

  Request:

      DELETE /_config/log/level HTTP/1.1
      Accept: application/json
      Host: localhost:5984

  Response:

      HTTP/1.1 200 OK
      Cache-Control: must-revalidate
      Content-Length: 7
      Content-Type: application/json
      Date: Sat, 10 Aug 2013 12:29:03 GMT
      Server: CouchDB (Erlang/OTP)

      "info"

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