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114 lines
4.1 KiB
Markdown
114 lines
4.1 KiB
Markdown
# Federation API
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This API allows a server administrator to manage Synapse's federation with other homeservers.
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Note: This API is new, experimental and "subject to change".
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## List of destinations
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This API gets the current destination retry timing info for all remote servers.
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The list contains all the servers with which the server federates,
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regardless of whether an error occurred or not.
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If an error occurs, it may take up to 20 minutes for the error to be displayed here,
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as a complete retry must have failed.
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The API is:
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A standard request with no filtering:
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```
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GET /_synapse/admin/v1/federation/destinations
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```
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A response body like the following is returned:
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```json
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{
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"destinations":[
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{
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"destination": "matrix.org",
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"retry_last_ts": 1557332397936,
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"retry_interval": 3000000,
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"failure_ts": 1557329397936,
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"last_successful_stream_ordering": null
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}
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],
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"total": 1
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}
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```
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To paginate, check for `next_token` and if present, call the endpoint again
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with `from` set to the value of `next_token`. This will return a new page.
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If the endpoint does not return a `next_token` then there are no more destinations
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to paginate through.
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**Parameters**
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The following query parameters are available:
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- `from` - Offset in the returned list. Defaults to `0`.
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- `limit` - Maximum amount of destinations to return. Defaults to `100`.
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- `order_by` - The method in which to sort the returned list of destinations.
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Valid values are:
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- `destination` - Destinations are ordered alphabetically by remote server name.
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This is the default.
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- `retry_last_ts` - Destinations are ordered by time of last retry attempt in ms.
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- `retry_interval` - Destinations are ordered by how long until next retry in ms.
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- `failure_ts` - Destinations are ordered by when the server started failing in ms.
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- `last_successful_stream_ordering` - Destinations are ordered by the stream ordering
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of the most recent successfully-sent PDU.
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- `dir` - Direction of room order. Either `f` for forwards or `b` for backwards. Setting
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this value to `b` will reverse the above sort order. Defaults to `f`.
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*Caution:* The database only has an index on the column `destination`.
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This means that if a different sort order is used,
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this can cause a large load on the database, especially for large environments.
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**Response**
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The following fields are returned in the JSON response body:
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- `destinations` - An array of objects, each containing information about a destination.
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Destination objects contain the following fields:
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- `destination` - string - Name of the remote server to federate.
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- `retry_last_ts` - integer - The last time Synapse tried and failed to reach the
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remote server, in ms. This is `0` if the last attempt to communicate with the
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remote server was successful.
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- `retry_interval` - integer - How long since the last time Synapse tried to reach
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the remote server before trying again, in ms. This is `0` if no further retrying occuring.
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- `failure_ts` - nullable integer - The first time Synapse tried and failed to reach the
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remote server, in ms. This is `null` if communication with the remote server has never failed.
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- `last_successful_stream_ordering` - nullable integer - The stream ordering of the most
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recent successfully-sent [PDU](understanding_synapse_through_grafana_graphs.md#federation)
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to this destination, or `null` if this information has not been tracked yet.
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- `next_token`: string representing a positive integer - Indication for pagination. See above.
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- `total` - integer - Total number of destinations.
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# Destination Details API
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This API gets the retry timing info for a specific remote server.
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The API is:
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```
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GET /_synapse/admin/v1/federation/destinations/<destination>
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```
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A response body like the following is returned:
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```json
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{
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"destination": "matrix.org",
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"retry_last_ts": 1557332397936,
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"retry_interval": 3000000,
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"failure_ts": 1557329397936,
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"last_successful_stream_ordering": null
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}
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```
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**Response**
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The response fields are the same like in the `destinations` array in
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[List of destinations](#list-of-destinations) response.
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