1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
# Federation API
This API allows a server administrator to manage Synapse's federation with other homeservers.
Note: This API is new, experimental and "subject to change".
## List of destinations
This API gets the current destination retry timing info for all remote servers.
The list contains all the servers with which the server federates,
regardless of whether an error occurred or not.
If an error occurs, it may take up to 20 minutes for the error to be displayed here,
as a complete retry must have failed.
The API is:
A standard request with no filtering:
```
GET /_synapse/admin/v1/federation/destinations
```
A response body like the following is returned:
```json
{
"destinations":[
{
"destination": "matrix.org",
"retry_last_ts": 1557332397936,
"retry_interval": 3000000,
"failure_ts": 1557329397936,
"last_successful_stream_ordering": null
}
],
"total": 1
}
```
To paginate, check for `next_token` and if present, call the endpoint again
with `from` set to the value of `next_token`. This will return a new page.
If the endpoint does not return a `next_token` then there are no more destinations
to paginate through.
**Parameters**
The following query parameters are available:
- `from` - Offset in the returned list. Defaults to `0`.
- `limit` - Maximum amount of destinations to return. Defaults to `100`.
- `order_by` - The method in which to sort the returned list of destinations.
Valid values are:
- `destination` - Destinations are ordered alphabetically by remote server name.
This is the default.
- `retry_last_ts` - Destinations are ordered by time of last retry attempt in ms.
- `retry_interval` - Destinations are ordered by how long until next retry in ms.
- `failure_ts` - Destinations are ordered by when the server started failing in ms.
- `last_successful_stream_ordering` - Destinations are ordered by the stream ordering
of the most recent successfully-sent PDU.
- `dir` - Direction of room order. Either `f` for forwards or `b` for backwards. Setting
this value to `b` will reverse the above sort order. Defaults to `f`.
*Caution:* The database only has an index on the column `destination`.
This means that if a different sort order is used,
this can cause a large load on the database, especially for large environments.
**Response**
The following fields are returned in the JSON response body:
- `destinations` - An array of objects, each containing information about a destination.
Destination objects contain the following fields:
- `destination` - string - Name of the remote server to federate.
- `retry_last_ts` - integer - The last time Synapse tried and failed to reach the
remote server, in ms. This is `0` if the last attempt to communicate with the
remote server was successful.
- `retry_interval` - integer - How long since the last time Synapse tried to reach
the remote server before trying again, in ms. This is `0` if no further retrying occuring.
- `failure_ts` - nullable integer - The first time Synapse tried and failed to reach the
remote server, in ms. This is `null` if communication with the remote server has never failed.
- `last_successful_stream_ordering` - nullable integer - The stream ordering of the most
recent successfully-sent [PDU](understanding_synapse_through_grafana_graphs.md#federation)
to this destination, or `null` if this information has not been tracked yet.
- `next_token`: string representing a positive integer - Indication for pagination. See above.
- `total` - integer - Total number of destinations.
## Destination Details API
This API gets the retry timing info for a specific remote server.
The API is:
```
GET /_synapse/admin/v1/federation/destinations/<destination>
```
A response body like the following is returned:
```json
{
"destination": "matrix.org",
"retry_last_ts": 1557332397936,
"retry_interval": 3000000,
"failure_ts": 1557329397936,
"last_successful_stream_ordering": null
}
```
**Parameters**
The following parameters should be set in the URL:
- `destination` - Name of the remote server.
**Response**
The response fields are the same like in the `destinations` array in
[List of destinations](#list-of-destinations) response.
## Destination rooms
This API gets the rooms that federate with a specific remote server.
The API is:
```
GET /_synapse/admin/v1/federation/destinations/<destination>/rooms
```
A response body like the following is returned:
```json
{
"rooms":[
{
"room_id": "!OGEhHVWSdvArJzumhm:matrix.org",
"stream_ordering": 8326
},
{
"room_id": "!xYvNcQPhnkrdUmYczI:matrix.org",
"stream_ordering": 93534
}
],
"total": 2
}
```
To paginate, check for `next_token` and if present, call the endpoint again
with `from` set to the value of `next_token`. This will return a new page.
If the endpoint does not return a `next_token` then there are no more destinations
to paginate through.
**Parameters**
The following parameters should be set in the URL:
- `destination` - Name of the remote server.
The following query parameters are available:
- `from` - Offset in the returned list. Defaults to `0`.
- `limit` - Maximum amount of destinations to return. Defaults to `100`.
- `dir` - Direction of room order by `room_id`. Either `f` for forwards or `b` for
backwards. Defaults to `f`.
**Response**
The following fields are returned in the JSON response body:
- `rooms` - An array of objects, each containing information about a room.
Room objects contain the following fields:
- `room_id` - string - The ID of the room.
- `stream_ordering` - integer - The stream ordering of the most recent
successfully-sent [PDU](understanding_synapse_through_grafana_graphs.md#federation)
to this destination in this room.
- `next_token`: string representing a positive integer - Indication for pagination. See above.
- `total` - integer - Total number of destinations.
## Reset connection timeout
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
([exponential backoff](https://en.wikipedia.org/wiki/Exponential_backoff)).
Admins can cancel the cooldown period with this API.
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 `retry_interval`.
The connection must have previously run into an error and `retry_last_ts`
([Destination Details API](#destination-details-api)) must not be equal to `0`.
The connection attempt is carried out in the background and can take a while
even if the API already returns the http status 200.
The API is:
```
POST /_synapse/admin/v1/federation/destinations/<destination>/reset_connection
{}
```
**Parameters**
The following parameters should be set in the URL:
- `destination` - Name of the remote server.
|
