[powerdns] integration tests

Build from source (:broken_heart:) and then test.

Rakefile

@@ -27,6 +27,7 @@ require './ci/nginx'
 require './ci/pgbouncer'
 require './ci/phpfpm'
 require './ci/postgres'
+require './ci/powerdns_recursor'
 require './ci/rabbitmq'
 require './ci/redis'
 require './ci/riak'

ci/powerdns_recursor.rb

@@ -0,0 +1,87 @@
+# (C) Datadog, Inc. 2010-2016
+# All rights reserved
+# Licensed under Simplified BSD License (see LICENSE)
+
+require './ci/common'
+
+def powerdns_recursor_version
+  ENV['FLAVOR_VERSION'] || '3.7.3'
+end
+
+def powerdns_recursor_rootdir
+  "#{ENV['INTEGRATIONS_DIR']}/powerdns_recursor_#{powerdns_recursor_version}"
+end
+
+def boost_version
+  '1_55_0'
+end
+
+namespace :ci do
+  namespace :powerdns_recursor do |flavor|
+    task before_install: ['ci:common:before_install']
+
+    task install: ['ci:common:install'] do
+      unless Dir.exist? File.expand_path(File.join(powerdns_recursor_rootdir), 'pdns_recursor')
+        # Downloads
+        # https://downloads.powerdns.com/releases/pdns-recursor-{powerdns_recursor_version}.tar.bz2
+        # http://downloads.sourceforge.net/project/boost/boost/1.55.0/boost_1_55_0.tar.bz2
+        sh %(curl -s -L\
+             -o $VOLATILE_DIR/powerdns_recursor-#{powerdns_recursor_version}.tar.bz2\
+              https://s3.amazonaws.com/dd-agent-tarball-mirror/pdns-recursor-#{powerdns_recursor_version}.tar.bz2)
+        sh %(mkdir -p #{powerdns_recursor_rootdir})
+        sh %(tar xf $VOLATILE_DIR/powerdns_recursor-#{powerdns_recursor_version}.tar.bz2\
+             -C #{powerdns_recursor_rootdir} --strip-components=1)
+        sh %(curl -s -L\
+           -o $VOLATILE_DIR/boost_#{boost_version}.tar.bz2\
+            https://s3.amazonaws.com/dd-agent-tarball-mirror/boost_#{boost_version}.tar.bz2)
+        sh %(tar xf $VOLATILE_DIR/boost_#{boost_version}.tar.bz2\
+             -C #{powerdns_recursor_rootdir} --strip-components=1)
+        ENV['CPATH'] = powerdns_recursor_rootdir
+        sh %(cd #{powerdns_recursor_rootdir} && ./configure)
+        sh %(cd #{powerdns_recursor_rootdir} && make || echo "make didn't succeed")
+      end
+    end
+
+    task before_script: ['ci:common:before_script'] do
+      sh %(#{powerdns_recursor_rootdir}/pdns_recursor\
+           --config-dir=tests/checks/fixtures/powerdns-recursor/\
+           --socket-dir=#{powerdns_recursor_rootdir})
+      sh %(dig @127.0.0.1 -p 5353 free.fr)
+    end
+
+    task script: ['ci:common:script'] do
+      this_provides = [
+        'powerdns_recursor'
+      ]
+      Rake::Task['ci:common:run_tests'].invoke(this_provides)
+    end
+
+    task cleanup: ['ci:common:cleanup'] do
+      sh %(kill `cat #{powerdns_recursor_rootdir}/pdns_recursor.pid` || echo 'Already dead')
+    end
+
+    task before_cache: ['ci:common:before_cache']
+
+    task cache: ['ci:common:cache']
+
+    task :execute do
+      exception = nil
+      begin
+        %w(before_install install before_script
+           script before_cache cache).each do |t|
+          Rake::Task["#{flavor.scope.path}:#{t}"].invoke
+        end
+      rescue => e
+        exception = e
+        puts "Failed task: #{e.class} #{e.message}".red
+      end
+      if ENV['SKIP_CLEANUP']
+        puts 'Skipping cleanup, disposable environments are great'.yellow
+      else
+        puts 'Cleaning up'
+        Rake::Task["#{flavor.scope.path}:cleanup"].invoke
+      end
+      raise exception if exception
+    end
+  end
+end

tests/checks/fixtures/powerdns-recursor/recursor.conf

@@ -0,0 +1,6 @@
+local-port=5353
+
+experimental-webserver=on
+experimental-webserver-address=127.0.0.1
+experimental-webserver-port=8082
+experimental-api-key=pdns_api_key

tests/checks/integration/test_powerdns_recursor.py

@@ -0,0 +1,103 @@
+# 3p
+from nose.plugins.attrib import attr
+
+# project
+from tests.checks.common import AgentCheckTest
+
+
+@attr(requires='powerdns_recursor')
+class TestPowerDNSRecursorCheck(AgentCheckTest):
+    CHECK_NAME = 'powerdns_recursor'
+
+    GAUGE_METRICS = [
+        'cache-entries',
+        'concurrent-queries',
+    ]
+    RATE_METRICS = [
+        'all-outqueries',
+        'answers-slow',
+        'answers0-1',
+        'answers1-10',
+        'answers10-100',
+        'answers100-1000',
+        'cache-hits',
+        'cache-misses',
+        'noerror-answers',
+        'outgoing-timeouts',
+        'questions',
+        'servfail-answers',
+        'tcp-outqueries',
+        'tcp-questions',
+    ]
+
+    def __init__(self, *args, **kwargs):
+        AgentCheckTest.__init__(self, *args, **kwargs)
+        self.config = {"instances": [{
+            "host": "127.0.0.1",
+            "port": "8082",
+            "api_key": "pdns_api_key"
+        }]}
+
+    # Really a basic check to see if all metrics are there
+    def test_check(self):
+        self.run_check_twice(self.config)
+
+        # Assert metrics
+        for metric in self.GAUGE_METRICS:
+            self.assertMetric(metric, 1.0, tags=[])
+
+        for metric in self.RATE_METRICS:
+            self.assertMetric(metric, tags=[])
+
+        service_check_tags = ['recursor_host:127.0.0.1', 'recursor_port:8082']
+        self.assertServiceOK('powerdns.recursor.can_connect', tags=service_check_tags)
+
+        self.coverage_report()
+
+    def test_tags(self):
+        config = self.config.copy()
+        tags = ['foo:bar']
+        config['instances'][0]['tags'] = ['foo:bar']
+        self.run_check_twice(config)
+
+        # Assert metrics
+        for metric in self.GAUGE_METRICS:
+            self.assertMetric(metric, 1.0, tags=tags)
+
+        for metric in self.RATE_METRICS:
+            self.assertMetric(metric, tags=tags)
+
+        service_check_tags = ['recursor_host:127.0.0.1', 'recursor_port:8082']
+        self.assertServiceOK('powerdns.recursor.can_connect', tags=service_check_tags)
+
+        self.coverage_report()
+
+    def test_bad_config(self):
+        config = self.config.copy()
+        config['instances'][0]['port'] = 1111
+        service_check_tags = ['recursor_host:127.0.0.1', 'recursor_port:1111']
+        self.assertRaises(
+            Exception,
+            lambda: self.run_check(config)
+        )
+        self.assertServiceCheckCritical('powerdns.recursor.can_connect', tags=service_check_tags)
+        self.coverage_report()
+
+    def test_bad_api_key(self):
+        config = self.config.copy()
+        config['instances'][0]['api_key'] = 'nope'
+        service_check_tags = ['recursor_host:127.0.0.1', 'recursor_port:8082']
+        self.assertRaises(
+            Exception,
+            lambda: self.run_check(config)
+        )
+        self.assertServiceCheckCritical('powerdns.recursor.can_connect', tags=service_check_tags)
+        self.coverage_report()
+
+    def test_very_bad_config(self):
+        for config in [{}, {"host": "localhost"}, {"port": 1000}, {"host": "localhost", "port": 1000}]:
+            self.assertRaises(
+                Exception,
+                lambda: self.run_check({"instances": [config]})
+            )
+        self.coverage_report()