def test_failover_insync(self):
        """ 
        bring down mirror segments,suspend in resync mode,failover to standby, run gprecoverseg.
        """
        tinctest.logger.info("-failover to standby in resync and recoverseg")
        # get standby host, port, and master data directory
        activatestdby = GpactivateStandby()
        self.standby_host = activatestdby.get_current_standby()
        self.standby_mdd = activatestdby.get_standby_dd()
        self.standby_port = activatestdby.get_standby_port()

        # bring down mirror segments and suspend
        Command('fault inject mirror segment', 'gpfaultinjector  -f filerep_consumer  -m async -y fault -r mirror -H ALL').run()

        # wait till segments come up in change tracking
        self.wait_till_changetracking_transition('localhost', os.environ['PGPORT'])

        Command('Injecting fault to suspend resync','gpfaultinjector -f filerep_resync -m async -y suspend -r primary -H ALL').run()
        Command('recover and suspend in insync','gprecoverseg -a').run()

        activatestdby.activate()   

        # Injecting Fault  to resume resync
        resume_resync_cmd = 'gpfaultinjector -f filerep_resync -m async -y resume -r primary -H ALL'
        activatestdby.run_remote(self.standby_host, resume_resync_cmd, self.standby_port, self.standby_mdd) 
        # Injecting Fault  to reset resync
        reset_resync_cmd = 'gpfaultinjector -f filerep_resync -m async -y reset -r primary -H ALL'
        activatestdby.run_remote(self.standby_host, reset_resync_cmd, self.standby_port, self.standby_mdd)

        # check if all segments are up and sync
        keyword = 'All segments are running normally'       
        self.wait_till_insync_transition(activatestdby,self.standby_host,self.standby_port,self.standby_mdd,keyword,True)        

    def test_failover_run__workload(self):
        ''' activate the standby, run workload, check master and standby
         integrity, currently support local standby, can not run workload
         remotely
        '''
 
        activatestdby = GpactivateStandby()
        activatestdby.activate()
      
        with walrepl.NewEnv(MASTER_DATA_DIRECTORY=self.standby_dir,
                             PGPORT=WalReplKillProcessTestCase.stdby_port,
                             PGDATABASE=self.pgdatabase) as env:
            test_case_list1 = []
            test_case_list1.append("mpp.gpdb.tests.storage.walrepl.crash.dml.test_dml.DMLTestCase")
            test_case_list1.append("mpp.gpdb.tests.storage.walrepl.crash.ddl.test_ddl.DDLTestCase")
            self.test_case_scenario.append(test_case_list1)

            test_case_list2 = []
            test_case_list2.append("mpp.gpdb.tests.storage.walrepl.crash.WalReplKillProcessTestCase.check_mirror_seg")
            self.test_case_scenario.append(test_case_list2)

            test_case_list3 = []
            test_case_list3.append("mpp.gpdb.tests.storage.walrepl.crash.verify.verify.DataVerifyTestCase")
            self.test_case_scenario.append(test_case_list3)
        pgutil.failback_to_original_master(self.origin_mdd, WalReplKillProcessTestCase.stdby_host, self.standby_dir,WalReplKillProcessTestCase.stdby_port)        

    def test_inject_primary_after_promote(self):
        """ 
        Promote to standby, bring down primary segments, run gprecoverseg.
        """
        tinctest.logger.info("-failover to standby, inject primary segments, and recoverseg")
        # get standby host, port, and master data directory
        activatestdby = GpactivateStandby()
        self.standby_host = activatestdby.get_current_standby()
        self.standby_mdd = activatestdby.get_standby_dd()
        self.standby_port = activatestdby.get_standby_port()
        activatestdby.activate()   

        # bring down primary segments
        inject_cmd = 'gpfaultinjector -f postmaster -m async -y panic -r primary -H ALL'
        activatestdby.run_remote(self.standby_host, inject_cmd, self.standby_port, self.standby_mdd)

        # wait till segments come up in change tracking
        self.wait_till_changetracking_transition(self.standby_host, self.standby_port)

        # recoverseg from new master
        (rc, stdout) = activatestdby.run_remote(self.standby_host,'gprecoverseg -a',self.standby_port,self.standby_mdd)
        tinctest.logger.info("in test_inject_primary_after_promote:  gprecoverseg -a:  %s"%stdout)

        keyword = 'Segment Pairs in Resynchronization'
        self.wait_till_insync_transition(activatestdby,self.standby_host,self.standby_port,self.standby_mdd,keyword,False)

        # rebalance from new master
        (rc, stdout) = activatestdby.run_remote(self.standby_host,'gprecoverseg -ra',self.standby_port,self.standby_mdd)
        tinctest.logger.info("in test_inject_primary_after_promote:  gprecoverseg -ar:  %s"%stdout)

        # check if all segments are up and sync
        keyword = 'All segments are running normally'
        self.wait_till_insync_transition(activatestdby,self.standby_host,self.standby_port,self.standby_mdd, keyword, True)        

 def check_stdby_stop(self):
     gpstdby = GpinitStandby()
     stdby_host = gpstdby.get_standbyhost()
     activate_stdby = GpactivateStandby()
     stdby_port = activate_stdby.get_standby_port()     
     master_pid = self.pgutil.get_pid_by_keyword(host=stdby_host, pgport=stdby_port, keyword="master", option = "bin")
     if int(master_pid) != -1:
         raise Exception("standby should stop but failed!")        

 def start_stdby(self):
     gpstdby = GpinitStandby()
     stdby_host = gpstdby.get_standbyhost()
     stdby_dbid = self.get_standby_dbid()
     activate_stdby = GpactivateStandby()
     stdby_mdd = activate_stdby.get_standby_dd()
     stdby_port = activate_stdby.get_standby_port()
     cmd="pg_ctl -D %s -o '-p %s --gp_dbid=%s --gp_num_contents_in_cluster=2 --silent-mode=true -i -M master --gp_contentid=-1 -x 0 -E' start &"%(stdby_mdd, stdby_port, stdby_dbid)
     self.run_remote(stdby_host,cmd,stdby_port,stdby_mdd)

 def setUp(self):
     super(WalReplKillProcessScenarioTestCase, self).setUp()
     pgutil.check_and_start_gpdb()
     # We should forcibly recreate standby, as it might has been promoted.
     pgutil.remove_standby()
     pgutil.install_standby()
     gpact_stdby = GpactivateStandby()
     gpinit_stdb = GpinitStandby()
     WalReplKillProcessTestCase.stdby_port = gpact_stdby.get_standby_port()
     WalReplKillProcessTestCase.stdby_host = gpinit_stdb.get_standbyhost()

    def test_inject_mirror_after_promote(self):
        """ 
        Promote to standby, bring down mirror segments,run gprecoverseg.
        """
        tinctest.logger.info("-failover to standby, inject mirror segments, and recoverseg")
        # get standby host, port, and master data directory
        activatestdby = GpactivateStandby()
        self.standby_host = activatestdby.get_current_standby()
        self.standby_mdd = activatestdby.get_standby_dd()
        self.standby_port = activatestdby.get_standby_port()
        activatestdby.activate()   

        # inject the mirror segments from new master
        inject_cmd = 'gpfaultinjector  -f filerep_consumer  -m async -y fault -r mirror -H ALL'
        activatestdby.run_remote(self.standby_host, inject_cmd, self.standby_port, self.standby_mdd) 

        # wait till segments come up in change tracking
        self.wait_till_changetracking_transition(self.standby_host, self.standby_port)

        # recoverseg from new master
        (rc, stdout) = activatestdby.run_remote(self.standby_host,'gprecoverseg -a',self.standby_port,self.standby_mdd)
        tinctest.logger.info("in test_inject_mirror_after_promote:  gprecoverseg -a:  %s"%stdout) 

        # check if all segments are up and sync
        keyword = 'All segments are running normally'
        self.wait_till_insync_transition(activatestdby,self.standby_host,self.standby_port,self.standby_mdd,keyword, True)      

 def setUp(self):
     pgutil.check_and_start_gpdb()
     # We should forcibly recreate standby, as it might has been promoted.
     # here we need to install locally, otherwise can not run remote sql
     pgutil.remove_standby()
     pgutil.install_standby(new_stdby_host=socket.gethostname())
     gpact_stdby = GpactivateStandby()
     gpinit_stdb = GpinitStandby()
     WalReplKillProcessTestCase.stdby_port = gpact_stdby.get_standby_port()
     WalReplKillProcessTestCase.stdby_host = gpinit_stdb.get_standbyhost()
     self.standby_dir = gpact_stdby.get_standby_dd()

 def kill_walreceiver(self):
     gpstdby = GpinitStandby()
     stdby_host = gpstdby.get_standbyhost()
     activate_stdby = GpactivateStandby()
     stdby_port = activate_stdby.get_standby_port()
     pid_list = []
     walreceiver_pid = self.pgutil.get_pid_by_keyword(host=stdby_host, pgport=stdby_port, keyword="wal receiver process")
     if int(walreceiver_pid) == -1:
         tinctest.logger.error("error: wal receiver process does not exist!")
         return False
     else:  
         pid_list.append(walreceiver_pid)
         self.killProcess_byPid(pid_toKill=pid_list, host=stdby_host)

 def test_backup_restore(self):
     # Create standby if not present
     Command('createdb bkdb','dropdb bkdb; createdb bkdb').run()
     self.create_standby()
     # Run workload
     self.run_workload('sql')
     # Create backup
     self.assertTrue(self.run_backup())
     # Activate standby
     gpac = GpactivateStandby()
     gpac.activate()        
     # Restore from new master
     self.assertTrue(self.run_restore())

 def start_stdby(self):
     gpstdby = GpinitStandby()
     stdby_host = gpstdby.get_standbyhost()
     stdby_dbid = self.get_standby_dbid()
     activate_stdby = GpactivateStandby()
     stdby_mdd = activate_stdby.get_standby_dd()
     stdby_port = activate_stdby.get_standby_port()
     cmd = "pg_ctl -D %s -o '-p %s -b %s -z 2 --silent-mode=true -i -M master -C -1 -x 0 -E' start &" % (
         stdby_mdd,
         stdby_port,
         stdby_dbid,
     )
     self.run_remote(stdby_host, cmd, stdby_port, stdby_mdd)

 def test_run_five(self):
     for i in xrange(5):
         with NewEnv(PGPORT=self.port,
                     MASTER_DATA_DIRECTORY=self.mdd):        
             pguti = GpUtility() 
             if i == 0:
                 pguti.install_standby(socket.gethostname(), self.mdd)
             # starting from second time, init standby from new master, standby_dir will be like  master_newstandby_newstandby...
             else:
                 pguti.install_standby(socket.gethostname(), os.path.join(self.mdd,'newstandby'))
             gpact = GpactivateStandby()
             self.mdd = gpact.get_standby_dd()
             self.port = gpact.get_standby_port()
             gpact.activate()
             tinctest.logger.info("self.mdd is %s, self.port is %s"%(self.mdd, self.port))

 def test_promote_incomplete_stdby(self):
     ''' 
     remove the standby base dir, try promote and check if fail       
     '''
     gpactivate_stdby = GpactivateStandby()
     gpinit_stdby = GpinitStandby()
     stdby_mdd = gpactivate_stdby.get_standby_dd()
     stdby_host = gpinit_stdby.get_standbyhost()
     stdby_port = gpactivate_stdby.get_standby_port()
     destDir = os.path.join(stdby_mdd, 'base')
     self.pgutil.clean_dir(stdby_host,destDir)
     promote_cmd = "pg_ctl promote -D %s"%stdby_mdd       
     (rc, output) = gpactivate_stdby.run_remote(stdby_host,promote_cmd ,stdby_port,stdby_mdd)
     self.assertEqual(rc, 0)
     pid = self.pgutil.get_pid_by_keyword(host=stdby_host, pgport=stdby_port, keyword='master', option='bin')
     self.assertTrue(int(pid) == -1, 'incomplete standby data directory promote succeeds.')

    def run_test(self):
        """
        Override of SQLTestCase.  Create a base backup and start standby,
        run some SQL in primary side then promote, check if the data is
        streamed correctly.
        """
        sql_file = self.sql_file
        ans_file = self.ans_file
        
        Command('gpinitstandby -r', 'gpinitstandby -ra').run()
        self.assertEqual(self.standby.create(), 0)
        gpact_stdby = GpactivateStandby()
        res = self.standby.start()
        self.assertTrue(res.wasSuccessful())

        # wait for the walreceiver to start
        num_walsender = self.wait_for_walsender()
        self.assertEqual(num_walsender, 1)

        # setup script is run on primary while standby is running.
        # .in file will be substitute with runtime information, if any.
        setup_file = sql_file.replace('.sql', '_setup.sql')
        if os.path.exists(setup_file + '.in'):
            self.preprocess_file(setup_file + '.in')
        self.assertTrue(PSQL.run_sql_file(setup_file, dbname=self.db_name))

        if self.promote_using_pg_ctl:
            self.assertTrue(self.standby.promote())
        else:
            self.assertTrue(self.standby.promote_manual())

        # fetch timelineids for both primary and standby (post-promote)
        primary_tli = self.fetch_tli(os.environ.get('MASTER_DATA_DIRECTORY'))
        standby_tli = self.fetch_tli(self.standby_datadir)

        logger.info("primary tli = " + primary_tli)
        logger.info("standby tli after promote = " + standby_tli)

        # primary_tli should be less than standby_tli by 1
        self.assertTrue(int(primary_tli) + 1 == int(standby_tli))

        # SQLTestCase doesn't allow to set port.  Use environ to tell it.
        with NewEnv(PGPORT=self.standby_port,MASTER_DATA_DIRECTORY=self.standby_datadir) as env:
            result = super(PromoteTestCase, self).run_test()
            return result
        # always fail back to old master after test complete
        gpact_stdby.failback_to_original_master()

 def invoke_sigterm_and_verify(self):
     ''' Invoke sigterm on wal receiver and verify that a new process is spawned after '''
     gpact_stdby = GpactivateStandby()
     standby_host = gpact_stdby.get_current_standby()
     standby_port = gpact_stdby.get_standby_port()
     wal_rec_pid_1 = self.pgutil.get_pid_by_keyword(host=standby_host, pgport=standby_port, keyword='wal receiver process', option='')
     sig_cmd = "gpssh -h %s -e 'kill -15 %s'" % (standby_host, wal_rec_pid_1)
     cmd = Command('Issue SIGTERM to wam receiver process', cmdStr=sig_cmd)
     tinctest.logger.info ('%s' % cmd)
     cmd.run(validateAfter=True)
     result = cmd.get_results()
     if result.rc != 0:
         return False        
     wal_rec_pid_2 = self.pgutil.get_pid_by_keyword(host=standby_host, pgport=standby_port, keyword='wal receiver process', option='')
     if wal_rec_pid_1 == wal_rec_pid_2:
         return False
     return True

 def __init__(self,methodName):
     self.gp = GpactivateStandby()
     self.verify = StandbyVerify()
     self.config = GPDBConfig()
     self.disk = Disk()
     self.sdby_mdd = os.environ.get('MASTER_DATA_DIRECTORY')
     self.pgport = os.environ.get('PGPORT')
     super(OODClass,self).__init__(methodName)

 def setUp(self):
     # For each test case we create a fresh standby and start it.
     self.db_name = self.__class__.db_name
     self.createdb(self.db_name)
     gputil.remove_standby()
     gputil.install_standby(new_stdby_host=socket.gethostname()) 
     self.gpinit_stdby = GpinitStandby()
     self.activatestdby = GpactivateStandby()

 def test_gpstop_after_failover(self):
     tinctest.logger.info("test gpstop from new master after failover")
     activatestdby = GpactivateStandby()
     standby_host = activatestdby.get_current_standby()
     standby_port =  activatestdby.get_standby_port()
     standby_mdd = activatestdby.get_standby_dd()
     activatestdby.activate()    
     (rc,stdout)=activatestdby.run_remote(standby_host, rmt_cmd='gpstop -a -M fast',
                                               pgport=standby_port,standbydd=standby_mdd) 
     self.assertEqual(0,rc)
     activatestdby.run_remote(standby_host, rmt_cmd='gpstart -a',
                                               pgport=standby_port,
                                               standbydd=standby_mdd)
     self.gputil.failback_to_original_master(self.origin_mdd, standby_host, standby_mdd, standby_port) 

    def test_run_workload_before_activate_standby(self):
        #run workload while removing initstandby, check master mirror integrity
        activatestdby = GpactivateStandby()
 
        test_case_list0 = []
        test_case_list0.append("mpp.gpdb.tests.storage.walrepl.crash.dml.test_dml.DMLTestCase")
        test_case_list0.append("mpp.gpdb.tests.storage.walrepl.crash.ddl.test_ddl.DDLTestCase")
        self.test_case_scenario.append(test_case_list0)  

        activatestdby.activate()
    
        test_case_list1 = []
        test_case_list1.append("mpp.gpdb.tests.storage.walrepl.crash.WalReplKillProcessTestCase.check_mirror_seg") 
        self.test_case_scenario.append(test_case_list1)
     
        test_case_list2 = []
        test_case_list2.append("mpp.gpdb.tests.storage.walrepl.crash.verify.verify.DataVerifyTestCase")
        self.test_case_scenario.append(test_case_list2)
        
        pgutil.failback_to_original_master(self.origin_mdd,WalReplKillProcessTestCase.stdby_host, self.standby_dir,WalReplKillProcessTestCase.stdby_port) 

 def test_gpactivatestandby_on_new_host(self):
     gputil.install_standby()
     initstdby = GpinitStandby()
     gpact_stdby = GpactivateStandby()
     self.mdd = gpact_stdby.get_standby_dd()
     self.host = initstdby.get_standbyhost()
     self.port = gpact_stdby.get_standby_port()
     self.standby_pid = gpact_stdby.get_standby_pid(self.host, self.port, self.mdd)
     PSQL.run_sql_file(local_path('create_tables.sql'), dbname = self.db_name)
     self.assertTrue(gpact_stdby.activate())
     self.assertTrue(gpact_stdby.verify_gpactivatestandby(self.standby_pid, self.host, self.port, self.mdd)) 
     gputil.failback_to_original_master(self.origin_mdd,self.host,self.mdd,self.port)