From: Paul Cuzner <pcuzner@redhat.com>
Date: Thu, 8 Oct 2020 03:35:45 +0000 (+1300)
Subject: mgr: add doc to describe relationship to prometheus
X-Git-Tag: v16.1.0~713^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=refs%2Fpull%2F37590%2Fhead;p=ceph.git

mgr: add doc to describe relationship to prometheus

The healthcheck for slow_ops is used by the mgr/prometheus
module so it's important the alert generated matches the
format expected in mgr/prometheus.

Signed-off-by: Paul Cuzner <pcuzner@redhat.com>
---

diff --git a/src/mgr/DaemonHealthMetricCollector.cc b/src/mgr/DaemonHealthMetricCollector.cc
index 4b51100ee2e..53c0b78a690 100644
--- a/src/mgr/DaemonHealthMetricCollector.cc
+++ b/src/mgr/DaemonHealthMetricCollector.cc
@@ -30,6 +30,8 @@ class SlowOps final : public DaemonHealthMetricCollector {
     if (daemons.empty()) {
       return;
     }
+    // Note this message format is used in mgr/prometheus, so any change in format
+    // requires a corresponding change in the mgr/prometheus module.
     ostringstream ss;
     if (daemons.size() > 1) {
       if (daemons.size() > 10) {