From aaaef9146cd2a2c6511ea8a0f70612b84f476bd7 Mon Sep 17 00:00:00 2001
From: Boris Ranto <branto@redhat.com>
Date: Mon, 29 Apr 2019 18:44:45 +0200
Subject: [PATCH] restful: Expose perf counters

We currently do not expose perf counters in the restful module but this
is a useful piece of information to be exposed by the restful module.

Since we already have a function to gather all the information about the
perf counters, we can make this easily accessible through the restful
API.

This also supports filtering by daemons through regexps.

Signed-off-by: Boris Ranto <branto@redhat.com>
---
 qa/workunits/rest/test_mgr_rest_api.py |  5 +++--
 src/pybind/mgr/restful/api/__init__.py |  2 ++
 src/pybind/mgr/restful/api/perf.py     | 27 ++++++++++++++++++++++++++
 3 files changed, 32 insertions(+), 2 deletions(-)
 create mode 100644 src/pybind/mgr/restful/api/perf.py

diff --git a/qa/workunits/rest/test_mgr_rest_api.py b/qa/workunits/rest/test_mgr_rest_api.py
index 871f5709399..4d868e7a8d3 100755
--- a/qa/workunits/rest/test_mgr_rest_api.py
+++ b/qa/workunits/rest/test_mgr_rest_api.py
@@ -72,8 +72,9 @@ screenplay = [
     ('get',    '/request?page=0', {}),
     ('delete', '/request', {}),
     ('get',    '/request', {}),
-    ('patch', '/pool/1', {'pg_num': 128}),
-    ('patch', '/pool/1', {'pgp_num': 128}),
+    ('patch',  '/pool/1', {'pg_num': 128}),
+    ('patch',  '/pool/1', {'pgp_num': 128}),
+    ('get',    '/perf?daemon=.*', {}),
 ]
 
 for method, endpoint, args in screenplay:
diff --git a/src/pybind/mgr/restful/api/__init__.py b/src/pybind/mgr/restful/api/__init__.py
index ebf2bd1dfcd..a105dfe87f8 100644
--- a/src/pybind/mgr/restful/api/__init__.py
+++ b/src/pybind/mgr/restful/api/__init__.py
@@ -7,6 +7,7 @@ from .doc import Doc
 from .mon import Mon
 from .osd import Osd
 from .pool import Pool
+from .perf import Perf
 from .request import Request
 from .server import Server
 
@@ -17,6 +18,7 @@ class Root(RestController):
     doc = Doc()
     mon = Mon()
     osd = Osd()
+    perf = Perf()
     pool = Pool()
     request = Request()
     server = Server()
diff --git a/src/pybind/mgr/restful/api/perf.py b/src/pybind/mgr/restful/api/perf.py
new file mode 100644
index 00000000000..4224599f669
--- /dev/null
+++ b/src/pybind/mgr/restful/api/perf.py
@@ -0,0 +1,27 @@
+from pecan import expose, request, response
+from pecan.rest import RestController
+
+from restful import context
+from restful.decorators import auth, lock, paginate
+
+import re
+
+class Perf(RestController):
+    @expose(template='json')
+    @paginate
+    @auth
+    def get(self, **kwargs):
+        """
+        List all the available performance counters
+
+        Options:
+         - 'daemon' -- filter by daemon, accepts Python regexp
+        """
+
+        counters = context.instance.get_all_perf_counters()
+
+        if 'daemon' in kwargs:
+            _re = re.compile(kwargs['daemon'])
+            counters = {k: v for k, v in counters.items() if _re.match(k)}
+
+        return counters
-- 
2.47.3