Remove PowerDNS

The PowerDNS package has not been updated since 2016. This commit
removes:
- package
- job
- all config values under `dns` except `domain_name`
- models under `src/bosh-director/lib/bosh/director/models/dns/`
  - all mention or use of `dns_db` which was a separate database
    configuration for these models

[#183367522]

config/blobs.yml

@@ -30,10 +30,6 @@ postgres/postgresql-15.6.tar.gz:
   size: 30299236
   object_id: 8cc25480-8de8-4f0b-56a2-b359ff6838dc
   sha: sha256:3a08314af1714671213a8a4f6bd646d0b1cdc94b029e8988944ab04d4b8cf2d2
-powerdns/pdns-static_3.3.1-1_amd64.deb:
-  size: 9353694
-  object_id: 6e861aa6-2e83-4027-a1e8-0ebec995c274
-  sha: 22bb46aa0b3e7671e0ee9aa30ed95c38841106ab
 s3cli/s3cli-0.0.272-linux-amd64:
   size: 18505101
   object_id: ccaa4dca-5bbb-4598-7f01-0ff16f89e762

jobs/director/spec

@@ -336,35 +336,9 @@ properties:
     default: false
 
   # DNS
-  dns.address:
-    description: Address of the powerdns server
   dns.domain_name:
     description: TLD of the dns zone used by bosh
     default: bosh
-  dns.db.adapter:
-    description: DNS Database adapter
-    default: postgres
-  dns.db.user:
-    description: DNS Database user
-    default: bosh
-  dns.db.password:
-    description: DNS Database password
-  dns.db.host:
-    description: DNS Database host
-    default: 127.0.0.1
-  dns.db.port:
-    description: Port that the powerdns database listens on
-    default: 5432
-  dns.db.database:
-    description: Name of the powerdns database
-    default: bosh
-  dns.db.connection_options:
-    description: |
-      Additional options for the powerdns database.
-      The below default applies to postgres databases. For config options for mysql dbs, refer to the mysql2 gem options.
-    default:
-      max_connections: 32  #Maximum size of the connection pool
-      pool_timeout: 10     #Number of seconds to wait if a connection cannot be acquired before  raising an error
 
   # Events
   director.events.record_events:

jobs/director/templates/director.yml.erb

@@ -169,32 +169,10 @@ params['scan_and_fix'] = {
   'auto_fix_stateful_nodes' => p('director.auto_fix_stateful_nodes')
 }
 
-if_p('dns.db.adapter', 'dns.db.user', 'dns.db.password', 'dns.db.host',
-     'dns.db.port', 'dns.db.database', 'dns.db.connection_options', 'dns.address') do
-  |adapter, user, password, db_host, port, database, connection_options, address|
+if_p('dns.domain_name') do |domain_name|
   params['dns'] = {
-    'server' => address,
-    'flush_command' => '/var/vcap/jobs/powerdns/bin/powerdns_ctl flush',
-    'db' => {
-        'adapter' => adapter,
-        'user' => user,
-        'password' => password,
-        'host' => db_host,
-        'port' => port,
-        'database' => database,
-        'connection_options' => connection_options
-     }
+    'domain_name' => domain_name
   }
-
-  if_p('dns.domain_name') do |domain_name|
-    params['dns']['domain_name'] = domain_name
-  end
-end.else do
-  if_p('dns.domain_name') do |domain_name|
-    params['dns'] = {
-      'domain_name' => domain_name
-    }
-  end
 end
 
 if p('blobstore.provider') == 's3'

spec/director.yml.erb_spec.rb

@@ -184,10 +184,10 @@
         end
       end
 
-      context 'when domain name specified without all other dns properties' do
+      context 'when dns.domain_name specified' do
         before do
           merged_manifest_properties['dns'] = {
-            'domain_name' => 'domain.name'
+            'domain_name' => 'fake.domain.name'
           }
         end
 
@@ -617,7 +617,6 @@
     let(:erb_yaml) { File.read(File.join(File.dirname(__FILE__), '../jobs/director/templates/director.yml.erb')) }
 
     subject(:parsed_yaml) do
-
       binding = Bosh::Template::EvaluationContext.new(
         {
           'job' => {'name' => 'i_like_bosh'},

src/bosh-dev/lib/bosh/dev/sandbox/main.rb

@@ -94,7 +94,6 @@ def initialize(db_opts, debug, test_env_number)
 
       @logger.level = ENV.fetch('LOG_LEVEL', 'DEBUG')
 
-      @dns_db_path = sandbox_path('director-dns.sqlite')
       @task_logs_dir = sandbox_path('boshdir/tasks')
       @blobstore_storage_dir = sandbox_path('bosh_test_blobstore')
       @verify_multidigest_path = File.join(REPO_ROOT, 'tmp', 'verify-multidigest', 'verify-multidigest')
@@ -278,7 +277,6 @@ def stop
 
       @sandbox_log_file.close unless @sandbox_log_file == STDOUT
 
-      FileUtils.rm_f(dns_db_path)
       FileUtils.rm_rf(agent_tmp_path)
       FileUtils.rm_rf(blobstore_storage_dir)
     end
@@ -289,9 +287,8 @@ def run
 
       loop { sleep 60 }
 
-    # rubocop:disable HandleExceptions
     rescue Interrupt
-    # rubocop:enable HandleExceptions
+      # Ignored
     ensure
       stop
       @logger.info('Stopped sandbox')
@@ -580,6 +577,6 @@ def get_nats_client_ca_private_key_path
       File.join(SANDBOX_ASSETS_DIR, 'nats_server', 'certs', 'rootCA.key')
     end
 
-    attr_reader :director_tmp_path, :dns_db_path, :task_logs_dir
+    attr_reader :director_tmp_path, :task_logs_dir
   end
 end

src/bosh-director/bin/bosh-director-migrate

@@ -25,11 +25,9 @@ director_db = config.db
 # Configure the singleton for migrations that need access to this config. There does not appear
 # to be a way to pass additional data or objects into Sequel gem migrations.
 if director_db.table_exists?(:releases)
-  config.configure_evil_config_singleton!(preload_db_classes: false)
+  config.configure_evil_config_singleton!
 end
 abort 'Director database config missing from config file' unless director_db
-dns_db = config.dns_db
 
 DBMigrator.new(director_db, :director).migrate
-DBMigrator.new(dns_db, :dns).migrate
 DBMigrator.new(director_db, :cpi, cpi: config.cpi).migrate

src/bosh-director/lib/bosh/director.rb

@@ -53,7 +53,6 @@ module Director
 require 'bosh/director/dns/dns_encoder'
 require 'bosh/director/dns/local_dns_encoder_manager'
 require 'bosh/director/dns/local_dns_manager'
-require 'bosh/director/dns/power_dns_manager'
 require 'bosh/director/dns/dns_records'
 require 'bosh/director/errors'
 require 'bosh/director/ext'

src/bosh-director/lib/bosh/director/api/controllers/info_controller.rb

@@ -3,10 +3,6 @@
 module Bosh::Director
   module Api::Controllers
     class InfoController < BaseController
-      def initialize(config)
-        super(config)
-        @powerdns_manager = PowerDnsManagerProvider.create
-      end
 
       def requires_authentication?
         false
@@ -27,10 +23,6 @@ def requires_authentication?
               'status' => Config.local_dns_enabled?,
               'extras' => { 'domain_name' => Config.root_domain },
             },
-            'power_dns' => {
-              'status' => @powerdns_manager.dns_enabled?,
-              'extras' => { 'domain_name' => @powerdns_manager.root_domain },
-            },
             'snapshots' => {
               'status' => Config.enable_snapshots,
             },

src/bosh-director/lib/bosh/director/cloudcheck_helper.rb

@@ -75,7 +75,6 @@ def recreate_vm(instance_model, wait_for_running = true)
             true,
           )
 
-        powerdns_manager = PowerDnsManagerProvider.create
         local_dns_manager = LocalDnsManager.create(Config.root_domain, @logger)
         dns_names_to_ip = {}
 
@@ -103,11 +102,8 @@ def recreate_vm(instance_model, wait_for_running = true)
         end
 
         @logger.debug("Updating DNS record for instance: #{instance_model.inspect}; to: #{dns_names_to_ip.inspect}")
-        powerdns_manager.update_dns_record_for_instance(instance_model, dns_names_to_ip)
         local_dns_manager.update_dns_record_for_instance(instance_plan_to_create)
 
-        powerdns_manager.flush_dns_cache
-
         cloud_check_procedure = lambda do
           blobstore_client = App.instance.blobstores.blobstore