tonysun83 commented on a change in pull request #660:
URL:
https://github.com/apache/couchdb-documentation/pull/660#discussion_r645721622
##########
File path: src/api/server/common.rst
##########
@@ -1586,6 +1586,76 @@ node, you can use:
This returns an entire statistics object, as with the full request, but
containing only the requested individual statistic.
+==================================
+``/_node/{node-name}/_prometheus``
+==================================
+
+.. http:get:: /_node/{node-name}/_prometheus
+ :synopsis: Returns server statistics in prometheus format
+
+ The ``_prometheus`` resource returns a text/plain response that
consolidates our
+ `_stats`, `active_task`, and `_system` endpoints. The format is determined
by
+ https://prometheus.io/docs/introduction/overview/. The format version is
2.0.
+
+ **Request**:
+
+ .. code-block:: http
+
+ GET /_node/_local/_prometheus HTTP/1.1
+ Accept: text/plain
+ Host: localhost:5984
+
+ **Response**:
+
+ .. code-block:: http
+
+ HTTP/1.1 200 OK
+ Cache-Control: must-revalidate
+ Content-Length: 187
+ Content-Type: text/plain; version=2.0
+ Date: Sat, 10 May 2020 11:41:11 GMT
+ Server: CouchDB (Erlang/OTP)
+
+ # TYPE couchdb_uptime_seconds counter
+ couchdb_uptime_seconds 1
+ # TYPE couchdb_erlang_memory_bytes gauge
+ couchdb_erlang_memory_bytes{memory_type="total"} 71237784
+ couchdb_erlang_memory_bytes{memory_type="processes"} 12248504
+ couchdb_erlang_memory_bytes{memory_type="processes_used"} 12235928
+ couchdb_erlang_memory_bytes{memory_type="system"} 58989280
+ couchdb_erlang_memory_bytes{memory_type="atom"} 1172689
+ couchdb_erlang_memory_bytes{memory_type="atom_used"} 1156575
+ couchdb_erlang_memory_bytes{memory_type="binary"} 182568
+ couchdb_erlang_memory_bytes{memory_type="code"} 27819083
+ couchdb_erlang_memory_bytes{memory_type="ets"} 3143536
+ # TYPE couchdb_erlang_gc_collections_total counter
+ couchdb_erlang_gc_collections_total 13417
+ # TYPE couchdb_erlang_gc_words_reclaimed_total counter
+ couchdb_erlang_gc_words_reclaimed_total 71296018
+ # TYPE couchdb_erlang_context_switches_total counter
+ couchdb_erlang_context_switches_total 358276
+ # TYPE couchdb_erlang_reductions_total counter
+ couchdb_erlang_reductions_total 46527253
+ # TYPE couchdb_erlang_processes gauge
+ couchdb_erlang_processes 528
+ # TYPE couchdb_erlang_process_limit gauge
+ couchdb_erlang_process_limit 262144
+ couchdb_active_task{type="replication", source="mailbox",
target="http://mailsrv:5984/mailbox <http://mailsrv:5984/mailbox>", docs_count
= "docs_read"} 4524
+ ouchdb_active_task{type="replication", source="mailbox",
target="http://mailsrv:5984/mailbox <http://mailsrv:5984/mailbox>", docs_count
= "docs_written"} 4524
+ couchdb_active_task{type="replication", source="mailbox",
target="http://mailsrv:5984/mailbox <http://mailsrv:5984/mailbox>", docs_count
= "missing_revisions_found"} 4524
Review comment:
added an ellipsis (I think I did it correctly) in there. This was a good
catch. I had mistakenly added `_active_tasks` into the documentation because
originally I wanted the PR to include `_active_tasks`. But upon inspecting the
entire list output I realized I didn't have it. I went back to the PR and I
remembered that `_active_tasks` is a little different given how it's actually
something we accumulate at the top of chttpd and not per node. That's why I
excluded it for this first version. The next improvement would be to dig deeper
grab tasks per node.
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