modify time in another way

tests/pytest/insert/retentionpolicy.py

@@ -44,7 +44,8 @@ class TDTestRetetion:
             caller = inspect.getframeinfo(inspect.stack()[1][0])
             args = (caller.filename, caller.lineno, sql, self.queryRows, expectRows)
             os.system("sudo timedatectl set-ntp true")
-            time.sleep(40)
+            os.system("date -s '%s'"%(datetime.datetime.now()+datetime.timedelta(hours=1)))
+            time.sleep(5)
             tdLog.exit("%s(%d) failed: sql:%s, queryRows:%d != expect:%d" % args)
 
     def run(self):
@@ -63,7 +64,7 @@ class TDTestRetetion:
         tdLog.info("=============== step2")
         tdDnodes.stop(1)
         os.system("sudo timedatectl set-ntp false")
-        os.system("sudo date -s $(date -d \"${DATE} 2 days\" \"+%Y%m%d\")")
+        os.system("date -s '%s'"%(datetime.datetime.now()+datetime.timedelta(hours=48)))
         tdDnodes.start(1)
         cmd = 'insert into test values(now,5);'
         tdDnodes.stop(1)
@@ -79,7 +80,7 @@ class TDTestRetetion:
             self.checkRows(5,cmd)
         tdLog.info("=============== step3")
         tdDnodes.stop(1)
-        os.system("sudo date -s $(date -d \"${DATE} 2 days\" \"+%Y%m%d\")")
+        os.system("date -s '%s'"%(datetime.datetime.now()+datetime.timedelta(hours=48)))
         tdDnodes.start(1)
         tdLog.info(cmd)
         tdSql.execute(cmd)
@@ -110,7 +111,8 @@ class TDTestRetetion:
 
     def stop(self):
         os.system("sudo timedatectl set-ntp true")
-        time.sleep(40)
+        os.system("date -s '%s'"%(datetime.datetime.now()+datetime.timedelta(hours=1)))
+        time.sleep(5)
         tdSql.close()
         tdLog.success("%s successfully executed" % __file__)