| commit | author | age | ||
| 4db06c | 1 | #!/usr/bin/python3 |
| SP | 2 | import requests |
| 3 | import json | |
| 4 | from time import sleep | |
| 5 | import uuid | |
| 6 | import subprocess | |
| 7 | #from trisurf import trisurf | |
| 8 | import os | |
| 9 | import shutil | |
| 10 | import signal | |
| 11 | import sys | |
| 12 | import socket | |
| 13 | from threading import Thread, Event | |
| 14 | """ | |
| 15 | p=None | |
| 16 | workingdir=None | |
| 17 | ||
| 18 | ||
| 19 | ||
| 20 | #--- SIGINT and SIGTERM HANDLING --- | |
| 21 | def signal_handler(signal,frame): | |
| 22 | global p | |
| 23 | global wirkingdir | |
| 24 | if p is not None: | |
| 25 | p.terminate() | |
| 26 | if(workingdir is not None): | |
| 27 | removeDir(workingdir.fullpath()) | |
| 28 | print("Process ended with signal " +str(signal)) | |
| 29 | sys.exit(0) | |
| 30 | signal.signal(signal.SIGINT, signal_handler) | |
| 31 | signal.signal(signal.SIGTERM, signal_handler) | |
| 32 | #--- END SIGINT and SIGTERM---- | |
| 33 | """ | |
| 34 | ||
| 35 | ||
| 36 | def get_hostname(): | |
| 37 | return socket.gethostname() | |
| 38 | ||
| 39 | def get_ip(): | |
| 40 | return ((([ip for ip in socket.gethostbyname_ex(socket.gethostname())[2] if not ip.startswith("127.")] or [[(s.connect(("8.8.8.8", 53)), s.getsockname()[0], s.close()) for s in [socket.socket(socket.AF_INET, socket.SOCK_DGRAM)]][0][1]]) + ["no IP found"])[0]) | |
| 41 | ||
| 42 | def get_client_id(addr, my_ip, my_hostname): | |
| 43 | client_auth={'ip':my_ip,'hostname':my_hostname} | |
| 44 | response=requests.post(addr+"/api/register/", data=client_auth) | |
| 45 | if(response.status_code==200): | |
| 46 | client_data=json.loads(response.text) | |
| 47 | client_id=client_data['id'] | |
| 48 | return client_id | |
| 49 | else: | |
| 50 | raise ValueError | |
| 51 | ||
| 52 | ||
| 53 | def get_run(addr,cid): | |
| 54 | response=requests.get(addr+"/api/getrun/"+str(cid)+"/") | |
| 55 | if(response.status_code==200): | |
| 56 | client_data=json.loads(response.text) | |
| 57 | rid=client_data['id'] | |
| 58 | tape=client_data['tape'] | |
| 59 | vtu=client_data['lastVTU'] | |
| 60 | status=client_data['status'] | |
| 61 | return (rid,tape,vtu,status) | |
| 62 | else: | |
| 63 | print(response.text) | |
| 64 | raise ValueError | |
| 65 | ||
| 66 | ||
| 67 | def ping_run(addr,cid, rid): | |
| 68 | client_data={'client_id':cid, 'run_id':rid} | |
| 69 | response=requests.post(addr+"/api/ping/", data=client_data) | |
| 70 | if(response.status_code==200): | |
| 71 | return | |
| 72 | else: | |
| 73 | raise ValueError | |
| 74 | ||
| 75 | def send_error_report(addr,cid, rid,errcode): | |
| 76 | client_data={'client_id':cid, 'run_id':rid, 'error_code':errcode} | |
| 77 | response=requests.post(addr+"/api/reporterr/", data=client_data) | |
| 78 | if(response.status_code==200): | |
| 79 | return | |
| 80 | else: | |
| 81 | raise ValueError | |
| 82 | ||
| 83 | def upload(addr,cid, rid, vtu, status): | |
| 84 | client_data={'client_id': cid, 'run_id': rid, 'lastVTU': vtu, 'status': status} | |
| 85 | response=requests.post(addr+"/api/upload/", data=client_data) | |
| 86 | if(response.status_code==200): | |
| 87 | return | |
| 88 | else: | |
| 89 | raise ValueError | |
| 90 | ||
| 91 | def getNewVTU(directory): | |
| 92 | fset=set() | |
| 93 | for file in os.listdir(directory): | |
| 94 | if file.endswith(".vtu") and file.startswith("timestep_"): | |
| 95 | fset.add(file) | |
| 96 | return fset | |
| 97 | ||
| 98 | ||
| 99 | def removeDir(directory): | |
| 100 | os.chdir('/') | |
| 101 | try: | |
| 102 | shutil.rmtree(directory) | |
| 103 | except: | |
| 104 | print("Cannot remove directory "+directory+ "\n") | |
| 105 | return | |
| 106 | ||
| 107 | ||
| 108 | ||
| 109 | ||
| 110 | class ClientThread(Thread): | |
| 111 | ||
| 112 | def __init__(self,conn_address='http://localhost:8000',subid=0, update_seconds=100): | |
| 113 | super(ClientThread,self).__init__() | |
| 114 | self._stop_event = Event() | |
| 115 | self._stop_event.clear() | |
| 116 | self.p=None | |
| 117 | self.workingdir=None | |
| 118 | self.conn_address=conn_address | |
| 119 | self.id=subid | |
| 120 | self.ip=get_ip() | |
| 121 | self.hostname=get_hostname() | |
| 122 | self.update_seconds=update_seconds | |
| 123 | ||
| 124 | def stop(self): | |
| 125 | self._stop_event.set() | |
| 126 | ||
| 127 | def isStopped(self): | |
| 128 | return self._stop_event.is_set() | |
| 129 | ||
| 130 | def join(self): | |
| 131 | print('joining threads') | |
| 132 | super(ClientThread, self).join() | |
| 133 | if self.p is not None: | |
| 134 | self.p.terminate() | |
| 135 | if self.workingdir is not None: | |
| 136 | removeDir(self.workingdir.fullpath()) | |
| 137 | ||
| 138 | ||
| 139 | def sleep(self,s): | |
| 140 | for i in range(0, s): | |
| 141 | if(self.isStopped()): | |
| 142 | return False | |
| 143 | sleep(1) | |
| 144 | return True | |
| 145 | ||
| 146 | def run(self): | |
| 147 | while(not self.isStopped()): | |
| 148 | try: | |
| 149 | cid=get_client_id(self.conn_address, self.ip, self.hostname) | |
| 150 | except: | |
| 151 | print("[{}] Could not get CID.".format(self.id)) | |
| 152 | self.sleep(10) | |
| 153 | continue | |
| 154 | #print("Got CID. getting RID.") | |
| 155 | while(not self.isStopped()): | |
| 156 | try: | |
| 157 | (rid,tape,vtu,status)=get_run(self.conn_address,cid) | |
| 158 | except: | |
| 159 | print("[{}] Could not get RID.".format(self.id)) | |
| 160 | self.sleep(10) | |
| 161 | break | |
| 162 | else: | |
| 163 | #start separate thread with simulations. | |
| 164 | self.workingdir=Directory('/tmp/ts_'+str(uuid.uuid4())) | |
| 165 | self.workingdir.makeifnotexist() | |
| 166 | self.workingdir.goto() | |
| 167 | with open(self.workingdir.fullpath()+"/tape", 'w') as f: | |
| 168 | f.write(tape) | |
| 169 | if(int(status)==-1): | |
| 170 | cmd=['trisurf', '--force-from-tape'] | |
| 171 | print("[{}] Run id={} :: Starting from tape.".format(self.id, rid)) | |
| 172 | else: | |
| 173 | with open(self.workingdir.fullpath()+"/.status",'w') as f: | |
| 174 | f.write(status) | |
| 175 | with open(self.workingdir.fullpath()+"/initial.vtu",'w') as f: | |
| 176 | f.write(vtu) | |
| 177 | cmd=['trisurf', '--restore-from-vtk', 'initial.vtu'] | |
| 178 | print("[{}] Run id={} :: Restoring from vtk, last timestep {}".format(self.id,rid,status)) | |
| 179 | self.p=subprocess.Popen(cmd, stdout=subprocess.DEVNULL) | |
| 180 | s=int(status) | |
| 181 | while(not self.isStopped()): | |
| 182 | #monitor for new file. If file is present, upload it! | |
| 183 | newVTU=getNewVTU(self.workingdir.fullpath()) | |
| 184 | if newVTU: #upload | |
| 185 | try: | |
| 186 | for nv in sorted(newVTU): | |
| 187 | with open(nv,'r') as f: | |
| 188 | fc=f.read() | |
| 189 | s=s+1 | |
| 190 | print('[{}] Uploading {}.'.format(self.id,nv)) | |
| 191 | upload(self.conn_address, cid, rid, fc, s) | |
| 192 | os.unlink(nv) | |
| 193 | except: | |
| 194 | print("[{}] Could not upload".format(self.id)) | |
| 195 | self.p.terminate() | |
| 196 | removeDir(self.workingdir.fullpath()) | |
| 197 | self.p=None | |
| 198 | self.workingdir=None | |
| 199 | break | |
| 200 | else: | |
| 201 | print("[{}] VTU uploaded.".format(self.id)) | |
| 202 | else: #ping | |
| 203 | try: | |
| 204 | ping_run(self.conn_address, cid, rid) | |
| 205 | except: | |
| 206 | print("[{}] Could not ping.".format(self.id)) | |
| 207 | self.p.terminate() | |
| 208 | self.p=None | |
| 209 | removeDir(self.workingdir.fullpath()) | |
| 210 | self.workingdir=None | |
| 211 | #stop simulations | |
| 212 | break | |
| 213 | #check if trisurf is still running. If not break the innermost loop. | |
| 214 | sleep(1) | |
| 215 | if(self.p.poll() is not None): # trisurf exited! | |
| 216 | print("[{}] Trisurf was stopped with return code {}".format(self.id, self.p.returncode)) | |
| 217 | if(self.p.returncode>0): | |
| 218 | try: | |
| 219 | send_error_report(self.conn_address, cid, rid, self.p.returncode) | |
| 220 | except: | |
| 221 | print("[{}] Server didn't accept error report".format(self.id)) | |
| 222 | removeDir(self.workingdir.fullpath()) | |
| 223 | self.workingdir=None | |
| 224 | self.p=None | |
| 225 | break | |
| 226 | self.sleep(self.update_seconds-1) | |
| 227 | ||
| 228 | ||
| 229 | ||
| 230 | #Stolen from trisurf library... Therefore, this client is not dependent on the installation of the library. | |
| 231 | class Directory: | |
| 232 | ''' | |
| 233 | Class deals with the paths where the simulation is run and data is stored. | |
| 234 | ''' | |
| 235 | def __init__(self, maindir=".", simdir=""): | |
| 236 | '''Initialization Directory() takes two optional parameters, namely maindir and simdir. Defaults to current directory. It sets local variables maindir and simdir accordingly.''' | |
| 237 | self.maindir=maindir | |
| 238 | self.simdir=simdir | |
| 239 | return | |
| 240 | ||
| 241 | def fullpath(self): | |
| 242 | ''' | |
| 243 | Method returns string of path where the data is stored. It combines values of maindir and simdir as maindir/simdir on Unix. | |
| 244 | ''' | |
| 245 | return os.path.join(self.maindir,self.simdir) | |
| 246 | ||
| 247 | def exists(self): | |
| 248 | ''' Method checks whether the directory specified by fullpath() exists. It return True/False on completion.''' | |
| 249 | path=self.fullpath() | |
| 250 | if(os.path.exists(path)): | |
| 251 | return True | |
| 252 | else: | |
| 253 | return False | |
| 254 | ||
| 255 | def make(self): | |
| 256 | ''' Method make() creates directory. If it fails it exits the program with error message.''' | |
| 257 | try: | |
| 258 | os.makedirs(self.fullpath()) | |
| 259 | except: | |
| 260 | print("Cannot make directory "+self.fullpath()+"\n") | |
| 261 | exit(1) | |
| 262 | return | |
| 263 | ||
| 264 | def makeifnotexist(self): | |
| 265 | '''Method makeifnotexist() creates directory if it does not exist.''' | |
| 266 | if(self.exists()==0): | |
| 267 | self.make() | |
| 268 | return True | |
| 269 | else: | |
| 270 | return False | |
| 271 | ||
| 272 | def remove(self): | |
| 273 | '''Method remove() removes directory recursively. WARNING! No questions asked.''' | |
| 274 | if(self.exists()): | |
| 275 | try: | |
| 276 | os.rmdir(self.fullpath()) | |
| 277 | except: | |
| 278 | print("Cannot remove directory "+self.fullpath()+ "\n") | |
| 279 | exit(1) | |
| 280 | return | |
| 281 | ||
| 282 | def goto(self): | |
| 283 | ''' | |
| 284 | Method goto() moves current directory to the one specified by fullpath(). WARNING: when using the relative paths, do not call this function multiple times. | |
| 285 | ''' | |
| 286 | try: | |
| 287 | os.chdir(self.fullpath()) | |
| 288 | except: | |
| 289 | print("Cannot go to directory "+self.fullpath()+"\n") | |
| 290 | return | |
| 291 | ||
| 292 | ||
| 293 | ||
| 294 | ||
| 295 | #--- SIGINT and SIGTERM HANDLING --- | |
| 296 | def signal_handler(signal,frame): | |
| 297 | t.stop() | |
| 298 | t.join() | |
| 299 | print("Process ended with signal " +str(signal)) | |
| 300 | sys.exit(0) | |
| 301 | #--- END SIGINT and SIGTERM---- | |
| 302 | ||
| 303 | if __name__ == '__main__': | |
| 304 | ||
| 305 | signal.signal(signal.SIGINT, signal_handler) | |
| 306 | signal.signal(signal.SIGTERM, signal_handler) | |
| 307 | ||
| 308 | t=ClientThread(update_seconds=100) | |
| 309 | t.start() | |
| 310 | print("main") | |
| 311 | while(True): | |
| 312 | sleep(1000) | |
