[EUWE] Resolve oVirt IP addresses (backport of ManageIQ/manageiq#13767)

app/models/manageiq/providers/redhat/infra_manager/api_integration.rb

@@ -1,3 +1,5 @@
+require 'resolv'
+
 module ManageIQ::Providers::Redhat::InfraManager::ApiIntegration
   extend ActiveSupport::Concern
 
@@ -27,6 +29,18 @@ def connect(options = {})
     password = options[:pass] || authentication_password(options[:auth_type])
     service  = options[:service] || "Service"
 
+    # Starting with version 4 of oVirt authentication doesn't work when using directly the IP address, it requires
+    # the fully qualified host name, so if we received an IP address we try to convert it into the corresponding
+    # host name:
+    if resolve_ip_addresses?
+      resolved = resolve_ip_address(server)
+      if resolved != server
+        _log.info("IP address '#{server}' has been resolved to host name '#{resolved}'.")
+        default_endpoint.hostname = resolved
+        server = resolved
+      end
+    end
+
     # Create the underlying connection according to the version of the oVirt API requested by
     # the caller:
     connect_method = "raw_connect_v#{version}".to_sym
@@ -336,4 +350,40 @@ def stale_cache?(last_refresh_time)
       last_refresh_time > current_val[:created_at]
     end
   end
+
+  private
+
+  #
+  # Checks if IP address to host name resolving is enabled.
+  #
+  # @return [Boolean] `true` if host name resolving is enabled in the configuration, `false` otherwise.
+  #
+  def resolve_ip_addresses?
+    ::Settings.ems.ems_redhat.resolve_ip_addresses
+  end
+
+  #
+  # Tries to convert the given IP address into a host name, doing a reverse DNS lookup if needed. If it
+  # isn't possible to find the host name the original IP address will be returned, and a warning will be
+  # written to the log.
+  #
+  # @param address [String] The IP address.
+  # @return [String] The host name.
+  #
+  def resolve_ip_address(address)
+    # Don't try to resolve unless the string is really an IP address and not a host name:
+    return address unless address =~ Resolv::IPv4::Regex || address =~ Resolv::IPv6::Regex
+
+    # Try to do a reverse resolve of the address to find the host name, using the default resolver, which
+    # means first using the local hosts file and then DNS:
+    begin
+      Resolv.getname(address)
+    rescue Resolv::ResolvError
+      _log.warn(
+        "Can't find fully qualified host name for IP address '#{address}', will use the IP address " \
+        "directly."
+      )
+      address
+    end
+  end
 end

config/settings.yml

@@ -93,6 +93,7 @@
     :purge_window_size: 10000
 :ems:
   :ems_redhat:
+    :resolve_ip_addresses: true
     :service:
       :read_timeout: 1.hour
   :ems_kubernetes:

spec/models/manageiq/providers/redhat/infra_manager/refresher_3_0_spec.rb

@@ -1,9 +1,12 @@
 describe ManageIQ::Providers::Redhat::InfraManager::Refresher do
+  let(:ip_address) { '192.168.252.231' }
+
   before(:each) do
     guid, server, zone = EvmSpecHelper.create_guid_miq_server_zone
-    @ems = FactoryGirl.create(:ems_redhat, :zone => zone, :hostname => "192.168.252.231", :ipaddress => "192.168.252.231", :port => 8443)
+    @ems = FactoryGirl.create(:ems_redhat, :zone => zone, :hostname => ip_address, :ipaddress => ip_address, :port => 8443)
     @ems.update_authentication(:default => {:userid => "[email protected]", :password => "password"})
     allow(@ems).to receive(:supported_api_versions).and_return([3])
+    allow(@ems).to receive(:resolve_ip_address).with(ip_address).and_return(ip_address)
   end
 
   it ".ems_type" do

spec/models/manageiq/providers/redhat/infra_manager/refresher_3_1_spec.rb

@@ -1,9 +1,12 @@
 describe ManageIQ::Providers::Redhat::InfraManager::Refresher do
+  let(:ip_address) { '192.168.252.230' }
+
   before(:each) do
     guid, server, zone = EvmSpecHelper.create_guid_miq_server_zone
-    @ems = FactoryGirl.create(:ems_redhat, :zone => zone, :hostname => "192.168.252.230", :ipaddress => "192.168.252.230", :port => 443)
+    @ems = FactoryGirl.create(:ems_redhat, :zone => zone, :hostname => ip_address, :ipaddress => ip_address, :port => 443)
     @ems.update_authentication(:default => {:userid => "[email protected]", :password => "password"})
     allow(@ems).to receive(:supported_api_versions).and_return([3])
+    allow(@ems).to receive(:resolve_ip_address).with(ip_address).and_return(ip_address)
   end
 
   it ".ems_type" do

spec/models/manageiq/providers/redhat/infra_manager/refresher_target_vm_spec.rb

@@ -1,8 +1,10 @@
 describe ManageIQ::Providers::Redhat::InfraManager::Refresher do
   context 'targeted refresh of a Vm' do
+    let(:ip_address) { '192.168.1.31' }
+
     before(:each) do
       _, _, zone = EvmSpecHelper.create_guid_miq_server_zone
-      @ems = FactoryGirl.create(:ems_redhat, :zone => zone, :hostname => "192.168.1.31", :ipaddress => "192.168.1.31",
+      @ems = FactoryGirl.create(:ems_redhat, :zone => zone, :hostname => ip_address, :ipaddress => ip_address,
                                 :port => 8443)
       @ems.update_authentication(:default => {:userid => "admin@internal", :password => "engine"})
 
@@ -13,6 +15,7 @@
                                     :name    => "Default")
 
       allow(@ems).to receive(:supported_api_versions).and_return([3, 4])
+      allow(@ems).to receive(:resolve_ip_address).with(ip_address).and_return(ip_address)
     end
 
     it "should refresh a vm" do
@@ -70,12 +73,15 @@
   end
 
   context 'targeted refresh after vm migration' do
+    let(:ip_address) { '10.35.161.51' }
+
     before(:each) do
       _guid, _server, zone = EvmSpecHelper.create_guid_miq_server_zone
       @ems = FactoryGirl.create(:ems_redhat, :zone => zone,
-                                :hostname => "10.35.161.51", :ipaddress => "10.35.161.51", :port => 443)
+                                :hostname => ip_address, :ipaddress => ip_address, :port => 443)
       @ems.update_authentication(:default => {:userid => "admin@internal", :password => "password"})
       allow(@ems).to receive(:supported_api_versions).and_return([3])
+      allow(@ems).to receive(:resolve_ip_address).with(ip_address).and_return(ip_address)
     end
 
     it 'should save the vms new host' do

spec/models/manageiq/providers/redhat/infra_manager/vm_spec.rb

@@ -1,4 +1,6 @@
 describe ManageIQ::Providers::Redhat::InfraManager::Vm do
+  let(:ip_address) { '192.168.1.31' }
+
   context "#is_available?" do
     let(:ems)  { FactoryGirl.create(:ems_redhat) }
     let(:host) { FactoryGirl.create(:host_redhat, :ext_management_system => ems) }
@@ -116,10 +118,11 @@
   describe "#disconnect_storage" do
     before(:each) do
       _, _, zone = EvmSpecHelper.create_guid_miq_server_zone
-      ems = FactoryGirl.create(:ems_redhat, :zone => zone, :hostname => "192.168.1.31",
-                               :ipaddress => "192.168.1.31", :port => 8443)
+      ems = FactoryGirl.create(:ems_redhat, :zone => zone, :hostname => ip_address,
+                               :ipaddress => ip_address, :port => 8443)
       ems.update_authentication(:default => {:userid => "admin@internal", :password => "engine"})
       allow(ems).to receive(:supported_api_versions).and_return([3, 4])
+      allow(ems).to receive(:resolve_ip_address).with(ip_address).and_return(ip_address)
 
       @storage = FactoryGirl.create(:storage, :ems_ref => "/api/storagedomains/ee745353-c069-4de8-8d76-ec2e155e2ca0")
       disk = FactoryGirl.create(:disk, :storage => @storage, :filename => "da123bb9-095a-4933-95f2-8032dfa332e1")