From accbe4500201031c9c0d458bcaf5470255fab9d1 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Kristoffer=20Gr=C3=B6nlund?= <kgronlund@suse.com>
Date: Thu, 27 Feb 2020 08:29:22 +0100
Subject: [PATCH] mgr/cephadm: Configure Alertmanagers in Prometheus
 configuration
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This will configure Prometheus with any alertmanager daemons
that have already been created.

TODO: Currently the Prometheus configuration is not updated if
additional alertmanager daemons are created.

Signed-off-by: Kristoffer Grönlund <kgronlund@suse.com>
---
 src/pybind/mgr/cephadm/module.py | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/src/pybind/mgr/cephadm/module.py b/src/pybind/mgr/cephadm/module.py
index 40ab86a7c1f10..7aee591890840 100644
--- a/src/pybind/mgr/cephadm/module.py
+++ b/src/pybind/mgr/cephadm/module.py
@@ -2226,6 +2226,26 @@ class CephadmOrchestrator(orchestrator.Orchestrator, MgrModule):
         instance: '{}'
 """.format([addr.split(':')[0] + ':9100'],
            dd.hostname)
+
+        # scrape alert managers
+        alertmgr_configs = ""
+        alertmgr_targets = []
+        for dd in self.cache.get_daemons_by_service('alertmanager'):
+            hi = self.inventory.get(dd.hostname, None)
+            if hi is None:
+                continue
+            addr = hi.get('addr', dd.hostname)
+            alertmgr_targets.append("'{}:9093'".format(addr.split(':')[0]))
+        if alertmgr_targets:
+            alertmgr_configs = """alerting:
+  alertmanagers:
+    - scheme: http
+      path_prefix: /alertmanager
+      static_configs:
+        - targets: [{}]
+""".format(", ".join(alertmgr_targets))
+
+        # generate the prometheus configuration
         j = json.dumps({
             'files': {
                 'prometheus.yml': """# generated by cephadm
@@ -2234,6 +2254,7 @@ global:
   evaluation_interval: 10s
 rule_files:
   - /etc/prometheus/alerting/*
+{alertmgr_configs}
 scrape_configs:
   - job_name: 'ceph'
     static_configs:
@@ -2244,6 +2265,7 @@ scrape_configs:
 """.format(
     mgr_scrape_list=str(mgr_scrape_list),
     node_configs=str(node_configs),
+    alertmgr_configs=str(alertmgr_configs)
     ),
             },
         })
-- 
2.39.5