change default sd method backup to consul

Author: Vonng

pigsty.yml

@@ -399,7 +399,7 @@ all: # top-level namespace, match all hosts
     prometheus_data_dir: /export/prometheus/data  # prometheus data dir
     prometheus_options: '--storage.tsdb.retention=30d'
     prometheus_reload: false                      # reload prometheus instead of recreate it
-    prometheus_sd_method: static                  # service discovery method: static|consul|etcd
+    prometheus_sd_method: consul                  # service discovery method: static|consul|etcd
     prometheus_scrape_interval: 2s                # global scrape & evaluation interval
     prometheus_scrape_timeout: 1s                 # scrape timeout
     prometheus_sd_interval: 2s                    # service discovery refresh interval

roles/prometheus/tasks/main.yml

@@ -98,6 +98,16 @@
       wait_for: host=127.0.0.1 port=9093 state=started
 
 
+#------------------------------------------------------------------------------
+# Reload
+#------------------------------------------------------------------------------
+- name: Reload prometheus and alertmanager
+  tags: prometheus_reload
+  block:
+    - name: Reload prometheus service
+      systemd: name=prometheus state=reloaded enabled=yes daemon_reload=yes
+
+
 #------------------------------------------------------------------------------
 # Register prometheus & alertmanager service (optional)
 #------------------------------------------------------------------------------