Fixes #23498 - run with mongo 3.4 from scl

To get version of the db server (may be remote) we assume the
'mongo' command is always available. If there is only mongo from SCL
present the mongo client has to be called from  within a scl.

With current state of things it is safe to assume there is at least
some mongo client installed. For the future We will need to figure out
how to install a correct version of the client.

definitions/features/mongo.rb

@@ -31,16 +31,31 @@ def initialize
     @configuration = load_db_config(config_file)
   end
 
+  # guess mongo version from installed packages
+  # safe method to run mongo commands prior we know
+  # what version uses the target DB
+  def available_core
+    return @core unless @core.nil? # return correct mongo ver if known
+    if @available_core.nil?
+      @available_core = ForemanMaintain::Utils::MongoCoreInstalled.new
+    end
+    @available_core
+  end
+
   def core
     if @core.nil?
-      version = server_version
-      @core = if version =~ /^3\.4/
-                logger.debug("Mongo #{version} detected, using commands from rh-mongodb34 SCL")
-                ForemanMaintain::Utils::MongoCore34.new
-              else
-                logger.debug("Mongo #{version} detected, using default commands")
-                ForemanMaintain::Utils::MongoCore.new
-              end
+      begin
+        version = server_version
+        @core = if version =~ /^3\.4/
+                  load_mongo_core_34(version)
+                else
+                  load_mongo_core_default(version)
+                end
+      rescue ForemanMaintain::Error::ExecutionError
+        # server version detection failed
+        logger.debug('Mongo version detection failed, choosing from installed versions')
+        @core = @available_core
+      end
     end
     @core
   end
@@ -78,14 +93,15 @@ def dropdb(config = configuration)
   end
 
   def ping(config = configuration)
-    execute?(mongo_command("--eval 'ping:1'"),
+    execute?(mongo_command("--eval 'ping:1'", config),
              :hidden_patterns => [config['password']].compact)
   end
 
   def server_version(config = configuration)
     # do not use any core methods as we need this prior the core is created
-    version = execute(base_command('mongo', config, "--eval 'db.version()' #{config['name']}"),
-                      :hidden_patterns => [config['password']].compact)
+    mongo_cmd = base_command(available_core.client_command, config,
+                             "--eval 'db.version()' #{config['name']}")
+    version = execute!(mongo_cmd, :hidden_patterns => [config['password']].compact)
     version.split("\n").last
   end
 
@@ -110,6 +126,22 @@ def find_base_directory(directory)
 
   private
 
+  def load_mongo_core_default(version)
+    unless find_package('mongodb')
+      raise ForemanMaintain::Error::Fail, 'Mongo client was not found'
+    end
+    logger.debug("Mongo #{version} detected, using default commands")
+    ForemanMaintain::Utils::MongoCore.new
+  end
+
+  def load_mongo_core_34(version)
+    unless find_package('rh-mongodb34-mongodb')
+      raise ForemanMaintain::Error::Fail, 'Mongo client ver. 3.4 was not found'
+    end
+    logger.debug("Mongo #{version} detected, using commands from rh-mongodb34 SCL")
+    ForemanMaintain::Utils::MongoCore34.new
+  end
+
   def norm_value(value)
     value = value.strip
     case value

lib/foreman_maintain/reporter/cli_reporter.rb

@@ -88,7 +88,8 @@ def before_scenario_starts(scenario)
       end
 
       def before_execution_starts(execution)
-        logger.info("--- Execution step '#{execution.name}' started ---")
+        label = execution.step.label.to_s.tr('_', '-')
+        logger.info("--- Execution step '#{execution.name}' [#{label}] started ---")
         puts(execution_info(execution, ''))
       end
 

lib/foreman_maintain/utils/mongo_core.rb

@@ -34,4 +34,37 @@ def dump_command
       'scl enable rh-mongodb34 -- mongodump'
     end
   end
+
+  class MongoCoreInstalled < MongoCore
+    include ForemanMaintain::Concerns::SystemHelpers
+
+    attr_reader :services, :server_config_files, :client_command, :dump_command
+
+    def initialize
+      @services = {}
+      @server_config_files = []
+
+      if find_package('mongodb-server')
+        @services['mongod'] = 5
+        @server_config_files << '/etc/mongod.conf'
+      end
+
+      if find_package('mongodb')
+        @client_command = 'mongo'
+        @dump_command = 'mongodump'
+      end
+
+      if find_package('rh-mongodb34-mongodb-server')
+        @services['rh-mongodb34-mongod'] = 5
+        @server_config_files << '/etc/opt/rh/rh-mongodb34/mongod.conf'
+      end
+
+      if find_package('rh-mongodb34-mongodb')
+        @client_command = 'scl enable rh-mongodb34 -- mongo'
+        @dump_command = 'scl enable rh-mongodb34 -- mongodump'
+      end
+
+      raise ForemanMaintain::Error::Fail, 'Mongo client was not found' unless @client_command
+    end
+  end
 end