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Add /read-only-sync endpoint (#2305) (#2311)

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`/read-only-sync` mirrors `/read-only`, but only returns `200` on a replica if this replica is a synchronous standby.
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Dennis4b
2022-05-30 17:09:43 +02:00
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parent f67174d7cc
commit b42550aad4
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docs/rest_api.rst
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@@ -44,8 +44,11 @@ For all health check ``GET`` requests Patroni returns a JSON document with the s
- ``GET /synchronous`` or ``GET /sync``: returns HTTP status code **200** only when the Patroni node is running as a synchronous standby.
- ``GET /read-only-sync``: like the above endpoint, but also includes the primary.
- ``GET /asynchronous`` or ``GET /async``: returns HTTP status code **200** only when the Patroni node is running as an asynchronous standby.
- ``GET /asynchronous?lag=<max-lag>`` or ``GET /async?lag=<max-lag>``: asynchronous standby check endpoint. In addition to checks from ``asynchronous`` or ``async``, it also checks replication latency and returns status code **200** only when it is below specified value. The key cluster.last_leader_operation from DCS is used for Leader wal position and compute latency on replica for performance reasons. max-lag can be specified in bytes (integer) or in human readable values, for e.g. 16kB, 64MB, 1GB.
- ``GET /async?lag=1048576``