Add a prometheus user to all postgres clusters

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

diff --git a/cookbooks/postgresql/recipes/default.rb b/cookbooks/postgresql/recipes/default.rb
index a3ef7d23d9f4bb2ce687531510cc7c7cc184bc62..ed58edb717a89dc96c8ae3500434a10ab1d49a50 100644 (file)
--- a/cookbooks/postgresql/recipes/default.rb
+++ b/cookbooks/postgresql/recipes/default.rb
@@ -108,39 +108,75 @@ ohai_plugin "postgresql" do
   template "ohai.rb.erb"
 end
 
+file "/etc/prometheus/exporters/postgres_queries.yml" do
+  action :delete
+end
+
 package "pgtop"
 package "libdbd-pg-perl"
 
 clusters = node[:postgresql][:clusters] || []
+passwords = data_bag_item("postgresql", "passwords")
 
 clusters.each do |name, details|
-  suffix = name.tr("/", ":")
+  prometheus_suffix = name.tr("/", "-")
+  prometheus_database = node[:postgresql][:monitor_database]
+
+  postgresql_user "prometheus" do
+    cluster name
+    password passwords["prometheus"]
+    roles "pg_monitor"
+    not_if { ::File.exist?("/var/lib/postgresql/#{name}/standby.signal") }
+  end
+
+  prometheus_exporter "postgres" do
+    port 10000 + details[:port].to_i
+    service "postgres-#{prometheus_suffix}"
+    labels "cluster" => name
+    scrape_interval "1m"
+    scrape_timeout "1m"
+    user "postgres"
+    options %w[
+      --collector.database_wraparound
+      --collector.long_running_transactions
+      --collector.process_idle
+      --collector.stat_activity_autovacuum
+      --collector.stat_wal_receiver
+      --collector.statio_user_indexes
+    ]
+    environment "DATA_SOURCE_NAME" => "postgres:///#{prometheus_database}?host=/run/postgresql&port=#{details[:port]}"
+    restrict_address_families "AF_UNIX"
+    remove_ipc false
+    subscribes :restart, "template[/etc/prometheus/exporters/postgres_queries.yml]"
+  end
+
+  munin_suffix = name.tr("/", ":")
 
-  munin_plugin "postgres_bgwriter_#{suffix}" do
+  munin_plugin "postgres_bgwriter_#{munin_suffix}" do
     target "postgres_bgwriter"
     conf "munin.erb"
     conf_variables :port => details[:port]
   end
 
-  munin_plugin "postgres_checkpoints_#{suffix}" do
+  munin_plugin "postgres_checkpoints_#{munin_suffix}" do
     target "postgres_checkpoints"
     conf "munin.erb"
     conf_variables :port => details[:port]
   end
 
-  munin_plugin "postgres_connections_db_#{suffix}" do
+  munin_plugin "postgres_connections_db_#{munin_suffix}" do
     target "postgres_connections_db"
     conf "munin.erb"
     conf_variables :port => details[:port]
   end
 
-  munin_plugin "postgres_users_#{suffix}" do
+  munin_plugin "postgres_users_#{munin_suffix}" do
     target "postgres_users"
     conf "munin.erb"
     conf_variables :port => details[:port]
   end
 
-  munin_plugin "postgres_xlog_#{suffix}" do
+  munin_plugin "postgres_xlog_#{munin_suffix}" do
     target "postgres_xlog"
     conf "munin.erb"
     conf_variables :port => details[:port]
@@ -148,34 +184,17 @@ clusters.each do |name, details|
 
   next unless File.exist?("/var/lib/postgresql/#{details[:version]}/main/recovery.conf")
 
-  munin_plugin "postgres_replication_#{suffix}" do
+  munin_plugin "postgres_replication_#{munin_suffix}" do
     target "postgres_replication"
     conf "munin.erb"
     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"
+service "prometheus-postgres-exporter" do
+  action [:stop, :disable]
 end
 
-prometheus_exporter "postgres" do
-  port 9187
-  scrape_interval "1m"
-  scrape_timeout "1m"
-  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"
-  restrict_address_families "AF_UNIX"
-  remove_ipc false
-  subscribes :restart, "template[/etc/prometheus/exporters/postgres_queries.yml]"
+systemd_service "prometheus-postgres-exporter" do
+  action :delete
 end