X-Git-Url: https://git.openstreetmap.org./chef.git/blobdiff_plain/ba65c5618d3113373c0f3306ce993917fc2af23a..c389f176ac7a568bedaa7bdd690438b72ecf35bf:/cookbooks/postgresql/recipes/default.rb

diff --git a/cookbooks/postgresql/recipes/default.rb b/cookbooks/postgresql/recipes/default.rb
index 9b17fae2a..a3ef7d23d 100644
--- a/cookbooks/postgresql/recipes/default.rb
+++ b/cookbooks/postgresql/recipes/default.rb
@@ -17,7 +17,9 @@
 # limitations under the License.
 #
 
+include_recipe "apt::postgresql"
 include_recipe "munin"
+include_recipe "prometheus"
 
 package "locales-all"
 package "postgresql-common"
@@ -31,67 +33,68 @@ node[:postgresql][:versions].each do |version|
   defaults = node[:postgresql][:settings][:defaults] || {}
   settings = node[:postgresql][:settings][version] || {}
 
+  standby_mode = settings[:standby_mode] || defaults[:standby_mode]
+  primary_conninfo = settings[:primary_conninfo] || defaults[:primary_conninfo]
+
+  passwords = if primary_conninfo
+                data_bag_item(primary_conninfo[:passwords][:bag],
+                              primary_conninfo[:passwords][:item])
+              end
+
   template "/etc/postgresql/#{version}/main/postgresql.conf" do
     source "postgresql.conf.erb"
     owner "postgres"
     group "postgres"
-    mode 0o644
-    variables :version => version, :defaults => defaults, :settings => settings
+    mode "644"
+    variables :version => version,
+              :defaults => defaults,
+              :settings => settings,
+              :primary_conninfo => primary_conninfo,
+              :passwords => passwords
     notifies :reload, "service[postgresql]"
+    only_if { ::Dir.exist?("/etc/postgresql/#{version}/main") }
   end
 
   template "/etc/postgresql/#{version}/main/pg_hba.conf" do
     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]"
+    only_if { ::Dir.exist?("/etc/postgresql/#{version}/main") }
   end
 
   template "/etc/postgresql/#{version}/main/pg_ident.conf" do
     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]"
+    only_if { ::Dir.exist?("/etc/postgresql/#{version}/main") }
   end
 
   link "/var/lib/postgresql/#{version}/main/server.crt" do
     to "/etc/ssl/certs/ssl-cert-snakeoil.pem"
+    only_if { ::Dir.exist?("/var/lib/postgresql/#{version}/main") }
   end
 
   link "/var/lib/postgresql/#{version}/main/server.key" do
     to "/etc/ssl/private/ssl-cert-snakeoil.key"
+    only_if { ::Dir.exist?("/var/lib/postgresql/#{version}/main") }
   end
 
-  standby_mode = settings[:standby_mode] || defaults[:standby_mode]
-  primary_conninfo = settings[:primary_conninfo] || defaults[:primary_conninfo]
-  restore_command = settings[:restore_command] || defaults[:restore_command]
-
-  if restore_command || standby_mode == "on"
-    passwords = if primary_conninfo
-                  data_bag_item(primary_conninfo[:passwords][:bag],
-                                primary_conninfo[:passwords][:item])
-                end
-
-    template "/var/lib/postgresql/#{version}/main/recovery.conf" do
-      source "recovery.conf.erb"
+  if standby_mode == "on"
+    file "/var/lib/postgresql/#{version}/main/standby.signal" do
       owner "postgres"
       group "postgres"
-      mode 0o640
-      variables :standby_mode => standby_mode,
-                :primary_conninfo => primary_conninfo,
-                :restore_command => restore_command,
-                :passwords => passwords
-      notifies :reload, "service[postgresql]"
+      mode "640"
     end
   else
-    template "/var/lib/postgresql/#{version}/main/recovery.conf" do
+    file "/var/lib/postgresql/#{version}/main/standby.signal" do
       action :delete
-      notifies :reload, "service[postgresql]"
     end
   end
 end
@@ -105,7 +108,7 @@ ohai_plugin "postgresql" do
   template "ohai.rb.erb"
 end
 
-package "ptop"
+package "pgtop"
 package "libdbd-pg-perl"
 
 clusters = node[:postgresql][:clusters] || []
@@ -151,3 +154,28 @@ 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
+  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]"
+end