| 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 | import os | |
| 8 | import shutil | |
| 9 | import signal | |
| 10 | import sys | |
| 11 | import socket | |
| 12 | from threading import Thread, Event | |
| 13 | ||
| 14 | def get_hostname(): | |
| 15 | return socket.gethostname() | |
| 16 | ||
| 17 | def get_ip(): | |
| 18 | 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]) | |
| 19 | ||
| 20 | def get_client_id(addr, my_ip, my_hostname): | |
| 21 | client_auth={'ip':my_ip,'hostname':my_hostname} | |
| 22 | response=requests.post(addr+"/api/register/", data=client_auth) | |
| 23 | if(response.status_code==200): | |
| 24 | client_data=json.loads(response.text) | |
| 25 | client_id=client_data['id'] | |
| 26 | return client_id | |
| 27 | else: | |
| 28 | raise ValueError | |
| 29 | ||
| 30 | ||
| 31 | def get_run(addr,cid): | |
| 32 | response=requests.get(addr+"/api/getrun/"+str(cid)+"/") | |
| 33 | if(response.status_code==200): | |
| 34 | client_data=json.loads(response.text) | |
| 35 | rid=client_data['id'] | |
| 36 | tape=client_data['tape'] | |
| 37 | vtu=client_data['lastVTU'] | |
| 38 | status=client_data['status'] | |
| 39 | return (rid,tape,vtu,status) | |
| 40 | else: | |
| 41 | print(response.text) | |
| ec673d | 42 | if(response.status_code==400): |
| SP | 43 | raise ValueError |
| 44 | else: | |
| 45 | raise NameError | |
| 4db06c | 46 | |
| SP | 47 | |
| 48 | def ping_run(addr,cid, rid): | |
| 49 | client_data={'client_id':cid, 'run_id':rid} | |
| 50 | response=requests.post(addr+"/api/ping/", data=client_data) | |
| 51 | if(response.status_code==200): | |
| 52 | return | |
| 53 | else: | |
| 54 | raise ValueError | |
| ec673d | 55 | |
| SP | 56 | def client_ping(addr,cid): |
| 57 | client_data={'client_id':cid} | |
| 58 | response=requests.post(addr+"/api/pingclient/", data=client_data) | |
| 59 | if(response.status_code==200): | |
| 60 | return | |
| 61 | else: | |
| 62 | raise ValueError | |
| 63 | ||
| 64 | ||
| 4db06c | 65 | |
| SP | 66 | def send_error_report(addr,cid, rid,errcode): |
| 67 | client_data={'client_id':cid, 'run_id':rid, 'error_code':errcode} | |
| 68 | response=requests.post(addr+"/api/reporterr/", data=client_data) | |
| 69 | if(response.status_code==200): | |
| 70 | return | |
| 71 | else: | |
| 72 | raise ValueError | |
| 73 | ||
| 74 | def upload(addr,cid, rid, vtu, status): | |
| 75 | client_data={'client_id': cid, 'run_id': rid, 'lastVTU': vtu, 'status': status} | |
| 76 | response=requests.post(addr+"/api/upload/", data=client_data) | |
| 77 | if(response.status_code==200): | |
| 78 | return | |
| 79 | else: | |
| 80 | raise ValueError | |
| 81 | ||
| 82 | def getNewVTU(directory): | |
| 83 | fset=set() | |
| 84 | for file in os.listdir(directory): | |
| 85 | if file.endswith(".vtu") and file.startswith("timestep_"): | |
| 86 | fset.add(file) | |
| 87 | return fset | |
| 88 | ||
| 89 | ||
| 90 | def removeDir(directory): | |
| 91 | os.chdir('/') | |
| 92 | try: | |
| 93 | shutil.rmtree(directory) | |
| 94 | except: | |
| 95 | print("Cannot remove directory "+directory+ "\n") | |
| 96 | return | |
| 97 | ||
| 98 | ||
| 99 | ||
| 100 | ||
| 101 | class ClientThread(Thread): | |
| 102 | ||
| 103 | def __init__(self,conn_address='http://localhost:8000',subid=0, update_seconds=100): | |
| 104 | super(ClientThread,self).__init__() | |
| 105 | self._stop_event = Event() | |
| 106 | self._stop_event.clear() | |
| 107 | self.p=None | |
| 108 | self.workingdir=None | |
| 109 | self.conn_address=conn_address | |
| 110 | self.id=subid | |
| 111 | self.ip=get_ip() | |
| 112 | self.hostname=get_hostname() | |
| ec673d | 113 | self.update_seconds=update_seconds |
| SP | 114 | |
| 4db06c | 115 | |
| SP | 116 | def stop(self): |
| 117 | self._stop_event.set() | |
| 118 | ||
| 119 | def isStopped(self): | |
| 120 | return self._stop_event.is_set() | |
| 121 | ||
| 122 | def join(self): | |
| 123 | print('joining threads') | |
| 124 | super(ClientThread, self).join() | |
| 125 | if self.p is not None: | |
| 126 | self.p.terminate() | |
| 127 | if self.workingdir is not None: | |
| 128 | removeDir(self.workingdir.fullpath()) | |
| 129 | ||
| 130 | ||
| 131 | def sleep(self,s): | |
| 132 | for i in range(0, s): | |
| 133 | if(self.isStopped()): | |
| 134 | return False | |
| 135 | sleep(1) | |
| 136 | return True | |
| 137 | ||
| 138 | def run(self): | |
| 139 | while(not self.isStopped()): | |
| 140 | try: | |
| 141 | cid=get_client_id(self.conn_address, self.ip, self.hostname) | |
| 142 | except: | |
| 143 | print("[{}] Could not get CID.".format(self.id)) | |
| 144 | self.sleep(10) | |
| 145 | continue | |
| 146 | #print("Got CID. getting RID.") | |
| ec673d | 147 | client_ping_time_elapsed=0 |
| 4db06c | 148 | while(not self.isStopped()): |
| SP | 149 | try: |
| 150 | (rid,tape,vtu,status)=get_run(self.conn_address,cid) | |
| ec673d | 151 | except NameError: |
| 4db06c | 152 | print("[{}] Could not get RID.".format(self.id)) |
| ec673d | 153 | self.sleep(10) |
| SP | 154 | client_ping_time_elapsed+=10 |
| 155 | if(client_ping_time_elapsed>=250): | |
| 156 | try: | |
| 157 | client_ping(self.conn_address,cid) | |
| 158 | except: | |
| 159 | break | |
| 160 | client_ping_time_elapsed=0 | |
| 161 | #if you put break instead of continue, there is no need to ping client. And it is more robust... | |
| 162 | continue | |
| 163 | except ValueError: | |
| 164 | print("[{}] Wrong CID? Getting new CID.".format(self.id)) | |
| 165 | #self.sleep(10) | |
| 166 | break | |
| 167 | except: | |
| 168 | print("[{}] Cannot connect. Server down? Retrying....".format(self.id)) | |
| 4db06c | 169 | break |
| SP | 170 | else: |
| 171 | #start separate thread with simulations. | |
| 172 | self.workingdir=Directory('/tmp/ts_'+str(uuid.uuid4())) | |
| 173 | self.workingdir.makeifnotexist() | |
| 174 | self.workingdir.goto() | |
| 175 | with open(self.workingdir.fullpath()+"/tape", 'w') as f: | |
| 176 | f.write(tape) | |
| 177 | if(int(status)==-1): | |
| 178 | cmd=['trisurf', '--force-from-tape'] | |
| 179 | print("[{}] Run id={} :: Starting from tape.".format(self.id, rid)) | |
| 180 | else: | |
| 181 | with open(self.workingdir.fullpath()+"/.status",'w') as f: | |
| 182 | f.write(status) | |
| 183 | with open(self.workingdir.fullpath()+"/initial.vtu",'w') as f: | |
| 184 | f.write(vtu) | |
| 185 | cmd=['trisurf', '--restore-from-vtk', 'initial.vtu'] | |
| 186 | print("[{}] Run id={} :: Restoring from vtk, last timestep {}".format(self.id,rid,status)) | |
| 187 | self.p=subprocess.Popen(cmd, stdout=subprocess.DEVNULL) | |
| 188 | s=int(status) | |
| 189 | while(not self.isStopped()): | |
| 190 | #monitor for new file. If file is present, upload it! | |
| 191 | newVTU=getNewVTU(self.workingdir.fullpath()) | |
| 192 | if newVTU: #upload | |
| 193 | try: | |
| 194 | for nv in sorted(newVTU): | |
| 195 | with open(nv,'r') as f: | |
| 196 | fc=f.read() | |
| 197 | s=s+1 | |
| 198 | print('[{}] Uploading {}.'.format(self.id,nv)) | |
| 199 | upload(self.conn_address, cid, rid, fc, s) | |
| 200 | os.unlink(nv) | |
| 201 | except: | |
| 202 | print("[{}] Could not upload".format(self.id)) | |
| 203 | self.p.terminate() | |
| 204 | removeDir(self.workingdir.fullpath()) | |
| 205 | self.p=None | |
| 206 | self.workingdir=None | |
| 207 | break | |
| 208 | else: | |
| 209 | print("[{}] VTU uploaded.".format(self.id)) | |
| 210 | else: #ping | |
| 211 | try: | |
| 212 | ping_run(self.conn_address, cid, rid) | |
| 213 | except: | |
| 214 | print("[{}] Could not ping.".format(self.id)) | |
| 215 | self.p.terminate() | |
| 216 | self.p=None | |
| 217 | removeDir(self.workingdir.fullpath()) | |
| 218 | self.workingdir=None | |
| 219 | #stop simulations | |
| 220 | break | |
| 221 | #check if trisurf is still running. If not break the innermost loop. | |
| 222 | sleep(1) | |
| 223 | if(self.p.poll() is not None): # trisurf exited! | |
| 224 | print("[{}] Trisurf was stopped with return code {}".format(self.id, self.p.returncode)) | |
| 225 | if(self.p.returncode>0): | |
| 226 | try: | |
| 227 | send_error_report(self.conn_address, cid, rid, self.p.returncode) | |
| 228 | except: | |
| 229 | print("[{}] Server didn't accept error report".format(self.id)) | |
| 230 | removeDir(self.workingdir.fullpath()) | |
| 231 | self.workingdir=None | |
| 232 | self.p=None | |
| 233 | break | |
| 234 | self.sleep(self.update_seconds-1) | |
| 235 | ||
| 236 | ||
| 237 | ||
| 238 | #Stolen from trisurf library... Therefore, this client is not dependent on the installation of the library. | |
| 239 | class Directory: | |
| 240 | ''' | |
| 241 | Class deals with the paths where the simulation is run and data is stored. | |
| 242 | ''' | |
| 243 | def __init__(self, maindir=".", simdir=""): | |
| 244 | '''Initialization Directory() takes two optional parameters, namely maindir and simdir. Defaults to current directory. It sets local variables maindir and simdir accordingly.''' | |
| 245 | self.maindir=maindir | |
| 246 | self.simdir=simdir | |
| 247 | return | |
| 248 | ||
| 249 | def fullpath(self): | |
| 250 | ''' | |
| 251 | Method returns string of path where the data is stored. It combines values of maindir and simdir as maindir/simdir on Unix. | |
| 252 | ''' | |
| 253 | return os.path.join(self.maindir,self.simdir) | |
| 254 | ||
| 255 | def exists(self): | |
| 256 | ''' Method checks whether the directory specified by fullpath() exists. It return True/False on completion.''' | |
| 257 | path=self.fullpath() | |
| 258 | if(os.path.exists(path)): | |
| 259 | return True | |
| 260 | else: | |
| 261 | return False | |
| 262 | ||
| 263 | def make(self): | |
| 264 | ''' Method make() creates directory. If it fails it exits the program with error message.''' | |
| 265 | try: | |
| 266 | os.makedirs(self.fullpath()) | |
| 267 | except: | |
| 268 | print("Cannot make directory "+self.fullpath()+"\n") | |
| 269 | exit(1) | |
| 270 | return | |
| 271 | ||
| 272 | def makeifnotexist(self): | |
| 273 | '''Method makeifnotexist() creates directory if it does not exist.''' | |
| 274 | if(self.exists()==0): | |
| 275 | self.make() | |
| 276 | return True | |
| 277 | else: | |
| 278 | return False | |
| 279 | ||
| 280 | def remove(self): | |
| 281 | '''Method remove() removes directory recursively. WARNING! No questions asked.''' | |
| 282 | if(self.exists()): | |
| 283 | try: | |
| 284 | os.rmdir(self.fullpath()) | |
| 285 | except: | |
| 286 | print("Cannot remove directory "+self.fullpath()+ "\n") | |
| 287 | exit(1) | |
| 288 | return | |
| 289 | ||
| 290 | def goto(self): | |
| 291 | ''' | |
| 292 | Method goto() moves current directory to the one specified by fullpath(). WARNING: when using the relative paths, do not call this function multiple times. | |
| 293 | ''' | |
| 294 | try: | |
| 295 | os.chdir(self.fullpath()) | |
| 296 | except: | |
| 297 | print("Cannot go to directory "+self.fullpath()+"\n") | |
| 298 | return | |
| 299 | ||
| 300 | ||
| 301 | ||
| 302 | #--- SIGINT and SIGTERM HANDLING --- | |
| 303 | def signal_handler(signal,frame): | |
| 304 | t.stop() | |
| 305 | t.join() | |
| 306 | print("Process ended with signal " +str(signal)) | |
| eccf3a | 307 | sys.exit(signal) |
| 4db06c | 308 | #--- END SIGINT and SIGTERM---- |
| SP | 309 | |
| 310 | if __name__ == '__main__': | |
| 311 | ||
| 312 | signal.signal(signal.SIGINT, signal_handler) | |
| 313 | signal.signal(signal.SIGTERM, signal_handler) | |
| 314 | ||
| 315 | t=ClientThread(update_seconds=100) | |
| 316 | t.start() | |
| 317 | print("main") | |
| 318 | while(True): | |
| 319 | sleep(1000) | |
