doc: add Chaos Test to README and update some functions

tests/README.md

@@ -163,12 +163,16 @@ cd /root/TDengine/packaging/smokeTest
 
 ## 3.3 Chaos Test
 
-[Desciprtion]
+A simple tool to exercise various functions of the system in a randomized fashion, hoping to expose maximum number of problems, hopefully without a pre-determined scenario.
 
 ### How to run test?
 
-[Placeholder]
+```bash
+cd tests/pytest
+python3 auto_crash_gen.py
+```
 
 ### How to add new case?
 
-[Placeholder]
+Add a function, such as TaskCreateNewFunction, to pytest/crash_gen/crash_gen_main.py.
+Integrate TaskCreateNewFunction into the balance_pickTaskType function in crash_gen_main.py.

tests/pytest/auto_crash_gen.py

@@ -244,7 +244,7 @@ def start_taosd():
     else:
         pass
 
-    start_cmd = 'cd %s && python3 test.py >>/dev/null '%(start_path)
+    start_cmd = 'cd %s && python3 test.py -G >>/dev/null '%(start_path)
     os.system(start_cmd)
 
 def get_cmds(args_list):
@@ -380,7 +380,6 @@ Core dir: {core_dir}
 '''
         text_result=text.split("Result: ")[1].split("Details")[0].strip()
         print(text_result)
-        
         if text_result == "success":
            send_msg(notification_robot_url, get_msg(text))
         else:

tests/pytest/auto_crash_gen_valgrind.py

@@ -245,7 +245,7 @@ def start_taosd():
     else:
         pass
 
-    start_cmd = 'cd %s && python3 test.py  '%(start_path)
+    start_cmd = 'cd %s && python3 test.py -G'%(start_path)
     os.system(start_cmd +">>/dev/null")
 
 def get_cmds(args_list):

tests/pytest/auto_crash_gen_valgrind_cluster.py

@@ -236,7 +236,7 @@ def start_taosd():
     else:
         pass
 
-    start_cmd = 'cd %s && python3 test.py -N 4 -M 1 '%(start_path)
+    start_cmd = 'cd %s && python3 test.py -N 4 -M 1 -G '%(start_path)
     os.system(start_cmd +">>/dev/null")
 
 def get_cmds(args_list):

tests/system-test/test.py

@@ -113,8 +113,9 @@ if __name__ == "__main__":
     asan = False
     independentMnode = False
     previousCluster = False
-    opts, args = getopt.gnu_getopt(sys.argv[1:], 'f:p:m:l:scghrd:k:e:N:M:Q:C:RWD:n:i:aP', [
-        'file=', 'path=', 'master', 'logSql', 'stop', 'cluster', 'valgrind', 'help', 'restart', 'updateCfgDict', 'killv', 'execCmd','dnodeNums','mnodeNums','queryPolicy','createDnodeNums','restful','websocket','adaptercfgupdate','replicaVar','independentMnode','previous'])
+    crashGen = False
+    opts, args = getopt.gnu_getopt(sys.argv[1:], 'f:p:m:l:scghrd:k:e:N:M:Q:C:RWD:n:i:aP:G', [
+        'file=', 'path=', 'master', 'logSql', 'stop', 'cluster', 'valgrind', 'help', 'restart', 'updateCfgDict', 'killv', 'execCmd','dnodeNums','mnodeNums','queryPolicy','createDnodeNums','restful','websocket','adaptercfgupdate','replicaVar','independentMnode','previous',"crashGen"])
     for key, value in opts:
         if key in ['-h', '--help']:
             tdLog.printNoPrefix(
@@ -141,6 +142,7 @@ if __name__ == "__main__":
             tdLog.printNoPrefix('-i independentMnode Mnode')
             tdLog.printNoPrefix('-a address sanitizer mode')
             tdLog.printNoPrefix('-P run case with [P]revious cluster, do not create new cluster to run case.')
+            tdLog.printNoPrefix('-G crashGen mode')
 
             sys.exit(0)
 
@@ -228,6 +230,10 @@ if __name__ == "__main__":
         if key in ['-P', '--previous']:
             previousCluster = True
 
+        if key in ['-G', '--crashGen']:
+            crashGen = True
+
+
     #
     # do exeCmd command
     #
@@ -692,6 +698,7 @@ if __name__ == "__main__":
         # tdDnodes.StopAllSigint()
         tdLog.info("Address sanitizer mode finished")
     else:
+        if not crashGen:
             tdDnodes.stopAll()
         tdLog.info("stop all td process finished")
     sys.exit(0)