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432 lines
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<main>
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<h1 id="federation-api"><a class="header" href="#federation-api">Federation API</a></h1>
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<p>This API allows a server administrator to manage Synapse’s federation with other homeservers.</p>
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<p>Note: This API is new, experimental and “subject to change”.</p>
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<h2 id="list-of-destinations"><a class="header" href="#list-of-destinations">List of destinations</a></h2>
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<p>This API gets the current destination retry timing info for all remote servers.</p>
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<p>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.</p>
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<p>The API is:</p>
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<p>A standard request with no filtering:</p>
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<pre><code>GET /_synapse/admin/v1/federation/destinations
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</code></pre>
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<p>A response body like the following is returned:</p>
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<pre><code class="language-json">{
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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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</code></pre>
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<p>To paginate, check for <code>next_token</code> and if present, call the endpoint again
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with <code>from</code> set to the value of <code>next_token</code>. This will return a new page.</p>
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<p>If the endpoint does not return a <code>next_token</code> then there are no more destinations
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to paginate through.</p>
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<p><strong>Parameters</strong></p>
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<p>The following query parameters are available:</p>
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<ul>
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<li><code>from</code> - Offset in the returned list. Defaults to <code>0</code>.</li>
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<li><code>limit</code> - Maximum amount of destinations to return. Defaults to <code>100</code>.</li>
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<li><code>order_by</code> - The method in which to sort the returned list of destinations.
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Valid values are:
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<ul>
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<li><code>destination</code> - Destinations are ordered alphabetically by remote server name.
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This is the default.</li>
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<li><code>retry_last_ts</code> - Destinations are ordered by time of last retry attempt in ms.</li>
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<li><code>retry_interval</code> - Destinations are ordered by how long until next retry in ms.</li>
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<li><code>failure_ts</code> - Destinations are ordered by when the server started failing in ms.</li>
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<li><code>last_successful_stream_ordering</code> - Destinations are ordered by the stream ordering
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of the most recent successfully-sent PDU.</li>
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</ul>
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||
</li>
|
||
<li><code>dir</code> - Direction of room order. Either <code>f</code> for forwards or <code>b</code> for backwards. Setting
|
||
this value to <code>b</code> will reverse the above sort order. Defaults to <code>f</code>.</li>
|
||
</ul>
|
||
<p><em>Caution:</em> The database only has an index on the column <code>destination</code>.
|
||
This means that if a different sort order is used,
|
||
this can cause a large load on the database, especially for large environments.</p>
|
||
<p><strong>Response</strong></p>
|
||
<p>The following fields are returned in the JSON response body:</p>
|
||
<ul>
|
||
<li><code>destinations</code> - An array of objects, each containing information about a destination.
|
||
Destination objects contain the following fields:
|
||
<ul>
|
||
<li><code>destination</code> - string - Name of the remote server to federate.</li>
|
||
<li><code>retry_last_ts</code> - integer - The last time Synapse tried and failed to reach the
|
||
remote server, in ms. This is <code>0</code> if the last attempt to communicate with the
|
||
remote server was successful.</li>
|
||
<li><code>retry_interval</code> - integer - How long since the last time Synapse tried to reach
|
||
the remote server before trying again, in ms. This is <code>0</code> if no further retrying occurring.</li>
|
||
<li><code>failure_ts</code> - nullable integer - The first time Synapse tried and failed to reach the
|
||
remote server, in ms. This is <code>null</code> if communication with the remote server has never failed.</li>
|
||
<li><code>last_successful_stream_ordering</code> - nullable integer - The stream ordering of the most
|
||
recent successfully-sent <a href="../understanding_synapse_through_grafana_graphs.html#federation">PDU</a>
|
||
to this destination, or <code>null</code> if this information has not been tracked yet.</li>
|
||
</ul>
|
||
</li>
|
||
<li><code>next_token</code>: string representing a positive integer - Indication for pagination. See above.</li>
|
||
<li><code>total</code> - integer - Total number of destinations.</li>
|
||
</ul>
|
||
<h2 id="destination-details-api"><a class="header" href="#destination-details-api">Destination Details API</a></h2>
|
||
<p>This API gets the retry timing info for a specific remote server.</p>
|
||
<p>The API is:</p>
|
||
<pre><code>GET /_synapse/admin/v1/federation/destinations/<destination>
|
||
</code></pre>
|
||
<p>A response body like the following is returned:</p>
|
||
<pre><code class="language-json">{
|
||
"destination": "matrix.org",
|
||
"retry_last_ts": 1557332397936,
|
||
"retry_interval": 3000000,
|
||
"failure_ts": 1557329397936,
|
||
"last_successful_stream_ordering": null
|
||
}
|
||
</code></pre>
|
||
<p><strong>Parameters</strong></p>
|
||
<p>The following parameters should be set in the URL:</p>
|
||
<ul>
|
||
<li><code>destination</code> - Name of the remote server.</li>
|
||
</ul>
|
||
<p><strong>Response</strong></p>
|
||
<p>The response fields are the same like in the <code>destinations</code> array in
|
||
<a href="#list-of-destinations">List of destinations</a> response.</p>
|
||
<h2 id="destination-rooms"><a class="header" href="#destination-rooms">Destination rooms</a></h2>
|
||
<p>This API gets the rooms that federate with a specific remote server.</p>
|
||
<p>The API is:</p>
|
||
<pre><code>GET /_synapse/admin/v1/federation/destinations/<destination>/rooms
|
||
</code></pre>
|
||
<p>A response body like the following is returned:</p>
|
||
<pre><code class="language-json">{
|
||
"rooms":[
|
||
{
|
||
"room_id": "!OGEhHVWSdvArJzumhm:matrix.org",
|
||
"stream_ordering": 8326
|
||
},
|
||
{
|
||
"room_id": "!xYvNcQPhnkrdUmYczI:matrix.org",
|
||
"stream_ordering": 93534
|
||
}
|
||
],
|
||
"total": 2
|
||
}
|
||
</code></pre>
|
||
<p>To paginate, check for <code>next_token</code> and if present, call the endpoint again
|
||
with <code>from</code> set to the value of <code>next_token</code>. This will return a new page.</p>
|
||
<p>If the endpoint does not return a <code>next_token</code> then there are no more destinations
|
||
to paginate through.</p>
|
||
<p><strong>Parameters</strong></p>
|
||
<p>The following parameters should be set in the URL:</p>
|
||
<ul>
|
||
<li><code>destination</code> - Name of the remote server.</li>
|
||
</ul>
|
||
<p>The following query parameters are available:</p>
|
||
<ul>
|
||
<li><code>from</code> - Offset in the returned list. Defaults to <code>0</code>.</li>
|
||
<li><code>limit</code> - Maximum amount of destinations to return. Defaults to <code>100</code>.</li>
|
||
<li><code>dir</code> - Direction of room order by <code>room_id</code>. Either <code>f</code> for forwards or <code>b</code> for
|
||
backwards. Defaults to <code>f</code>.</li>
|
||
</ul>
|
||
<p><strong>Response</strong></p>
|
||
<p>The following fields are returned in the JSON response body:</p>
|
||
<ul>
|
||
<li><code>rooms</code> - An array of objects, each containing information about a room.
|
||
Room objects contain the following fields:
|
||
<ul>
|
||
<li><code>room_id</code> - string - The ID of the room.</li>
|
||
<li><code>stream_ordering</code> - integer - The stream ordering of the most recent
|
||
successfully-sent <a href="../understanding_synapse_through_grafana_graphs.html#federation">PDU</a>
|
||
to this destination in this room.</li>
|
||
</ul>
|
||
</li>
|
||
<li><code>next_token</code>: string representing a positive integer - Indication for pagination. See above.</li>
|
||
<li><code>total</code> - integer - Total number of destinations.</li>
|
||
</ul>
|
||
<h2 id="reset-connection-timeout"><a class="header" href="#reset-connection-timeout">Reset connection timeout</a></h2>
|
||
<p>Synapse makes federation requests to other homeservers. If a federation request fails,
|
||
Synapse will mark the destination homeserver as offline, preventing any future requests
|
||
to that server for a “cooldown” period. This period grows over time if the server
|
||
continues to fail its responses
|
||
(<a href="https://en.wikipedia.org/wiki/Exponential_backoff">exponential backoff</a>).</p>
|
||
<p>Admins can cancel the cooldown period with this API.</p>
|
||
<p>This API resets the retry timing for a specific remote server and tries to connect to
|
||
the remote server again. It does not wait for the next <code>retry_interval</code>.
|
||
The connection must have previously run into an error and <code>retry_last_ts</code>
|
||
(<a href="#destination-details-api">Destination Details API</a>) must not be equal to <code>0</code>.</p>
|
||
<p>The connection attempt is carried out in the background and can take a while
|
||
even if the API already returns the http status 200.</p>
|
||
<p>The API is:</p>
|
||
<pre><code>POST /_synapse/admin/v1/federation/destinations/<destination>/reset_connection
|
||
|
||
{}
|
||
</code></pre>
|
||
<p><strong>Parameters</strong></p>
|
||
<p>The following parameters should be set in the URL:</p>
|
||
<ul>
|
||
<li><code>destination</code> - Name of the remote server.</li>
|
||
</ul>
|
||
|
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