1 | #Licensed to the Apache Software Foundation (ASF) under one |
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2 | #or more contributor license agreements. See the NOTICE file |
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3 | #distributed with this work for additional information |
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4 | #regarding copyright ownership. The ASF licenses this file |
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5 | #to you under the Apache License, Version 2.0 (the |
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6 | #"License"); you may not use this file except in compliance |
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7 | #with the License. You may obtain a copy of the License at |
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8 | |
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9 | # http://www.apache.org/licenses/LICENSE-2.0 |
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10 | |
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11 | #Unless required by applicable law or agreed to in writing, software |
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12 | #distributed under the License is distributed on an "AS IS" BASIS, |
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13 | #WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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14 | #See the License for the specific language governing permissions and |
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15 | #limitations under the License. |
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16 | import errno, sys, os, traceback, stat, socket, re, warnings, signal |
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17 | |
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18 | from hodlib.Common.tcp import tcpSocket, tcpError |
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19 | from hodlib.Common.threads import simpleCommand |
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20 | |
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21 | setUGV = { 'S_ISUID' : 2, 'S_ISGID' : 1, 'S_ISVTX' : 0 } |
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22 | reEscapeSeq = r"\\(.)?" |
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23 | reEscapeSeq = re.compile(reEscapeSeq) |
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24 | |
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25 | HOD_INTERRUPTED_CODE = 127 |
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26 | HOD_INTERRUPTED_MESG = "Hod interrupted. Cleaning up and exiting" |
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27 | TORQUE_USER_LIMITS_COMMENT_FIELD = "User-limits exceeded. " + \ |
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28 | "Requested:([0-9]*) Used:([0-9]*) MaxLimit:([0-9]*)" |
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29 | TORQUE_USER_LIMITS_EXCEEDED_MSG = "Requested number of nodes exceeded " + \ |
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30 | "maximum user limits. " |
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31 | |
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32 | class AlarmException(Exception): |
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33 | def __init__(self, msg=''): |
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34 | self.message = msg |
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35 | Exception.__init__(self, msg) |
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36 | |
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37 | def __repr__(self): |
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38 | return self.message |
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39 | |
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40 | def isProcessRunning(pid): |
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41 | '''Check if a process is running, by sending it a 0 signal, and checking for errors''' |
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42 | # This method is documented in some email threads on the python mailing list. |
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43 | # For e.g.: http://mail.python.org/pipermail/python-list/2002-May/144522.html |
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44 | try: |
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45 | os.kill(pid, 0) |
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46 | return True |
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47 | except OSError, err: |
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48 | return err.errno == errno.EPERM |
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49 | |
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50 | def untar(file, targetDir): |
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51 | status = False |
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52 | command = 'tar -C %s -zxf %s' % (targetDir, file) |
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53 | commandObj = simpleCommand('untar', command) |
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54 | commandObj.start() |
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55 | commandObj.wait() |
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56 | commandObj.join() |
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57 | if commandObj.exit_code() == 0: |
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58 | status = True |
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59 | |
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60 | return status |
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61 | |
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62 | def tar(tarFile, tarDirectory, tarList): |
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63 | currentDir = os.getcwd() |
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64 | os.chdir(tarDirectory) |
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65 | status = False |
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66 | command = 'tar -czf %s ' % (tarFile) |
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67 | |
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68 | for file in tarList: |
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69 | command = "%s%s " % (command, file) |
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70 | |
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71 | commandObj = simpleCommand('tar', command) |
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72 | commandObj.start() |
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73 | commandObj.wait() |
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74 | commandObj.join() |
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75 | if commandObj.exit_code() == 0: |
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76 | status = True |
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77 | else: |
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78 | status = commandObj.exit_status_string() |
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79 | |
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80 | os.chdir(currentDir) |
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81 | |
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82 | return status |
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83 | |
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84 | def to_http_url(list): |
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85 | """convert [hostname, port] to a http url""" |
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86 | str = '' |
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87 | str = "http://%s:%s" % (list[0], list[1]) |
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88 | |
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89 | return str |
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90 | |
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91 | def get_exception_string(): |
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92 | (type, value, tb) = sys.exc_info() |
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93 | exceptList = traceback.format_exception(type, value, tb) |
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94 | exceptString = '' |
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95 | for line in exceptList: |
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96 | exceptString = "%s%s" % (exceptString, line) |
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97 | |
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98 | return exceptString |
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99 | |
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100 | def get_exception_error_string(): |
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101 | (type, value, tb) = sys.exc_info() |
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102 | if value: |
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103 | exceptString = "%s %s" % (type, value) |
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104 | else: |
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105 | exceptString = type |
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106 | |
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107 | return exceptString |
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108 | |
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109 | def check_timestamp(timeStamp): |
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110 | """ Checks the validity of a timeStamp. |
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111 | |
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112 | timeStamp - (YYYY-MM-DD HH:MM:SS in UTC) |
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113 | |
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114 | returns True or False |
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115 | """ |
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116 | isValid = True |
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117 | |
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118 | try: |
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119 | timeStruct = time.strptime(timeStamp, "%Y-%m-%d %H:%M:%S") |
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120 | except: |
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121 | isValid = False |
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122 | |
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123 | return isValid |
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124 | |
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125 | def sig_wrapper(sigNum, handler, *args): |
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126 | if args: |
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127 | handler(args) |
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128 | else: |
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129 | handler() |
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130 | |
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131 | def get_perms(filename): |
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132 | mode = stat.S_IMODE(os.stat(filename)[stat.ST_MODE]) |
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133 | permsString = '' |
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134 | permSet = 0 |
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135 | place = 2 |
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136 | for who in "USR", "GRP", "OTH": |
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137 | for what in "R", "W", "X": |
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138 | if mode & getattr(stat,"S_I"+what+who): |
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139 | permSet = permSet + 2**place |
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140 | place = place - 1 |
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141 | |
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142 | permsString = "%s%s" % (permsString, permSet) |
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143 | permSet = 0 |
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144 | place = 2 |
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145 | |
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146 | permSet = 0 |
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147 | for permFlag in setUGV.keys(): |
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148 | if mode & getattr(stat, permFlag): |
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149 | permSet = permSet + 2**setUGV[permFlag] |
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150 | |
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151 | permsString = "%s%s" % (permSet, permsString) |
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152 | |
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153 | return permsString |
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154 | |
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155 | def local_fqdn(): |
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156 | """Return a system's true FQDN rather than any aliases, which are |
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157 | occasionally returned by socket.gethostname.""" |
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158 | |
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159 | fqdn = None |
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160 | me = os.uname()[1] |
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161 | nameInfo=socket.gethostbyname_ex(me) |
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162 | nameInfo[1].append(nameInfo[0]) |
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163 | for name in nameInfo[1]: |
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164 | if name.count(".") and name.startswith(me): |
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165 | fqdn = name |
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166 | if fqdn == None: |
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167 | fqdn = me |
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168 | return(fqdn) |
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169 | |
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170 | def need_to_allocate(allocated, config, command): |
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171 | status = True |
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172 | |
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173 | if allocated.isSet(): |
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174 | status = False |
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175 | elif re.search("\s*dfs.*$", command) and \ |
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176 | config['gridservice-hdfs']['external']: |
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177 | status = False |
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178 | elif config['gridservice-mapred']['external']: |
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179 | status = False |
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180 | |
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181 | return status |
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182 | |
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183 | def filter_warnings(): |
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184 | warnings.filterwarnings('ignore', |
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185 | message=".*?'with' will become a reserved keyword.*") |
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186 | |
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187 | def args_to_string(list): |
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188 | """return a string argument space seperated""" |
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189 | arg = '' |
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190 | for item in list: |
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191 | arg = "%s%s " % (arg, item) |
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192 | return arg[:-1] |
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193 | |
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194 | def replace_escapes(object): |
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195 | """ replace any escaped character. e.g \, with , \= with = and so on """ |
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196 | # here object is either a config object or a options object |
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197 | for section in object._mySections: |
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198 | for option in object._configDef[section].keys(): |
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199 | if object[section].has_key(option): |
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200 | if object._configDef[section][option]['type'] == 'keyval': |
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201 | keyValDict = object[section][option] |
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202 | object[section][option] = {} |
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203 | for (key,value) in keyValDict.iteritems(): |
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204 | match = reEscapeSeq.search(value) |
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205 | if match: |
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206 | value = reEscapeSeq.sub(r"\1", value) |
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207 | object[section][option][key] = value |
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208 | |
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209 | def hadoopVersion(hadoopDir, java_home, log): |
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210 | # Determine the version of hadoop being used by executing the |
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211 | # hadoop version command. Code earlier in idleTracker.py |
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212 | hadoopVersion = { 'major' : None, 'minor' : None } |
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213 | hadoopPath = os.path.join(hadoopDir, 'bin', 'hadoop') |
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214 | cmd = "%s version" % hadoopPath |
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215 | log.debug('Executing command %s to find hadoop version' % cmd) |
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216 | env = os.environ |
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217 | env['JAVA_HOME'] = java_home |
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218 | hadoopVerCmd = simpleCommand('HadoopVersion', cmd, env) |
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219 | hadoopVerCmd.start() |
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220 | hadoopVerCmd.wait() |
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221 | hadoopVerCmd.join() |
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222 | if hadoopVerCmd.exit_code() == 0: |
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223 | verLine = hadoopVerCmd.output()[0] |
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224 | log.debug('Version from hadoop command: %s' % verLine) |
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225 | hadoopVerRegExp = re.compile("Hadoop ([0-9]+)\.([0-9]+).*") |
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226 | verMatch = hadoopVerRegExp.match(verLine) |
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227 | if verMatch != None: |
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228 | hadoopVersion['major'] = verMatch.group(1) |
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229 | hadoopVersion['minor'] = verMatch.group(2) |
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230 | return hadoopVersion |
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231 | |
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232 | |
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233 | def get_cluster_status(hdfsAddress, mapredAddress): |
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234 | """Determine the status of the cluster based on socket availability |
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235 | of HDFS and Map/Reduce.""" |
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236 | status = 0 |
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237 | |
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238 | mapredSocket = tcpSocket(mapredAddress) |
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239 | try: |
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240 | mapredSocket.open() |
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241 | mapredSocket.close() |
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242 | except tcpError: |
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243 | status = 14 |
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244 | |
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245 | hdfsSocket = tcpSocket(hdfsAddress) |
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246 | try: |
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247 | hdfsSocket.open() |
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248 | hdfsSocket.close() |
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249 | except tcpError: |
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250 | if status > 0: |
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251 | status = 10 |
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252 | else: |
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253 | status = 13 |
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254 | |
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255 | return status |
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256 | |
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257 | def parseEquals(list): |
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258 | # takes in a list of keyval pairs e.g ['a=b','c=d'] and returns a |
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259 | # dict e.g {'a'='b','c'='d'}. Used in GridService/{mapred.py/hdfs.py} and |
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260 | # HodRing/hodring.py. No need for specially treating escaped =. as in \=, |
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261 | # since all keys are generated by hod and don't contain such anomalies |
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262 | dict = {} |
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263 | for elems in list: |
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264 | splits = elems.split('=') |
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265 | dict[splits[0]] = splits[1] |
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266 | return dict |
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267 | |
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268 | def getMapredSystemDirectory(mrSysDirRoot, userid, jobid): |
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269 | return os.path.join(mrSysDirRoot, userid, 'mapredsystem', jobid) |
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270 | |
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271 | class HodInterrupt: |
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272 | def __init__(self): |
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273 | self.HodInterruptFlag = False |
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274 | self.log = None |
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275 | |
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276 | def set_log(self, log): |
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277 | self.log = log |
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278 | |
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279 | def init_signals(self): |
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280 | |
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281 | def sigStop(sigNum, handler): |
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282 | sig_wrapper(sigNum, self.setFlag) |
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283 | |
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284 | signal.signal(signal.SIGTERM, sigStop) # 15 : software termination signal |
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285 | signal.signal(signal.SIGQUIT, sigStop) # 3 : Quit program |
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286 | signal.signal(signal.SIGINT, sigStop) # 2 ^C : Interrupt program |
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287 | |
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288 | def sig_wrapper(sigNum, handler, *args): |
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289 | self.log.critical("Caught signal %s." % sigNum ) |
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290 | |
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291 | if args: |
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292 | handler(args) |
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293 | else: |
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294 | handler() |
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295 | |
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296 | def setFlag(self, val = True): |
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297 | self.HodInterruptFlag = val |
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298 | |
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299 | def isSet(self): |
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300 | return self.HodInterruptFlag |
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301 | |
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302 | class HodInterruptException(Exception): |
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303 | def __init__(self, value = ""): |
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304 | self.value = value |
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305 | |
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306 | def __str__(self): |
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307 | return repr(self.value) |
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308 | |
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309 | hodInterrupt = HodInterrupt() |
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