Fix prometheus monitoring of multiple postgres instances

[chef.git] / cookbooks / postgresql / recipes / default.rb

diff --git a/cookbooks/postgresql/recipes/default.rb b/cookbooks/postgresql/recipes/default.rb
index a513f018e7b3c551a73fef41e53298b5d826ba13..47ec3e80bfffee64cc580f0b8e09747adc339fa6 100644 (file)
--- a/cookbooks/postgresql/recipes/default.rb
+++ b/cookbooks/postgresql/recipes/default.rb
@@ -19,6 +19,7 @@
 
 include_recipe "apt"
 include_recipe "munin"
+include_recipe "prometheus"
 
 package "locales-all"
 package "postgresql-common"
@@ -36,7 +37,7 @@ node[:postgresql][:versions].each do |version|
     source "postgresql.conf.erb"
     owner "postgres"
     group "postgres"
-    mode 0o644
+    mode "644"
     variables :version => version, :defaults => defaults, :settings => settings
     notifies :reload, "service[postgresql]"
   end
@@ -45,7 +46,7 @@ node[:postgresql][:versions].each do |version|
     source "pg_hba.conf.erb"
     owner "postgres"
     group "postgres"
-    mode 0o640
+    mode "640"
     variables :early_rules => settings[:early_authentication_rules] || defaults[:early_authentication_rules],
               :late_rules => settings[:late_authentication_rules] || defaults[:late_authentication_rules]
     notifies :reload, "service[postgresql]"
@@ -55,7 +56,7 @@ node[:postgresql][:versions].each do |version|
     source "pg_ident.conf.erb"
     owner "postgres"
     group "postgres"
-    mode 0o640
+    mode "640"
     variables :maps => settings[:user_name_maps] || defaults[:user_name_maps]
     notifies :reload, "service[postgresql]"
   end
@@ -82,7 +83,7 @@ node[:postgresql][:versions].each do |version|
       source "recovery.conf.erb"
       owner "postgres"
       group "postgres"
-      mode 0o640
+      mode "640"
       variables :standby_mode => standby_mode,
                 :primary_conninfo => primary_conninfo,
                 :restore_command => restore_command,
@@ -152,3 +153,24 @@ clusters.each do |name, details|
     conf_variables :port => details[:port]
   end
 end
+
+uris = clusters.collect do |_, details|
+  "postgres@:#{details[:port]}/postgres?host=/run/postgresql"
+end
+
+template "/etc/prometheus/exporters/postgres_queries.yml" do
+  source "postgres_queries.yml.erb"
+  owner "root"
+  group "root"
+  mode "644"
+end
+
+prometheus_exporter "postgres" do
+  port 9187
+  user "postgres"
+  options "--extend.query-path=/etc/prometheus/exporters/postgres_queries.yml"
+  environment "DATA_SOURCE_URI" => uris.sort.uniq.first,
+              "PG_EXPORTER_AUTO_DISCOVER_DATABASES" => "true",
+              "PG_EXPORTER_EXCLUDE_DATABASES" => "postgres,template0,template1"
+  subscribes :restart, "template[/etc/prometheus/exporters/postgres_queries.yml]"
+end