Ref : http://onlamp.com/pub/a/onlamp/2006/04/20/advanced-mysql-replication.html?page=2
Date:22/02/2010
This Script is still under development.
Purpose:
Develop a nagios script, which would be able to check replication status between 4 Master/Master Server.
This scripy will check following :
#1.Each Mysql servers are online : Stats: Done
#2.If Slave process is running : Status:Done
#3.If Slave IO process is running : Status:Done
#4.If There is any bin log position difference between Master/Slave :Status:Done
#5.Check time in processlist for(Has read all relay log; waiting for the slave I/O thread to update it) for further repliation related problems. Status: Under Development
#6.If problem found,change Master server info in Slave, and connect to differerent Master server. :Status :Under Development
#7. Change Dns record(A record) to stop comming http request to the problematic server:Status:Under Development
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 | #!/bin/bash ################################################################################ #SVN Version: 28 #Script Version 28 #Purpose of this script: #Check Bellow options between 4 mysql Master/Master Replication #1.Every Mysql servers are online: Status:Done #2.If Slave process is running: Status:Done #3.If Slave IO process is running: Status:Done #4.If There is any bin log position difference between Master/Slave: Status:Done #5.Check time in processlist for:Status: In Development #6.If problem found change Master server info in Slave #7. Change Dns record(A record) to stop comming http request to the problematic sever ################################################################################# #Status check for nagios script STATE_OK=0 STATE_WARNING=1 STATE_CRITICAL=2 STATE_UNKNOWN=3 STATE_DEPENDENT=4 #Define All the variables declare -rx SCRIPT=${0##*/} declare -rx CMD_AWK="/bin/awk" declare -rx CMD_MYSQL="/usr/local/mysql/bin/mysql" declare -rx CMD_GREP="/bin/grep" ##Define value for nagios is to fire for certain conditions for log check CRITICAL_VALUE=100 CRITICAL_VALUE=50 NORMAL_VALUE=0 ####################################################################### #####Define All the servers Ip, username and password for mysql server# ####################################################################### declare -rx SLV_MSTRServerA="Ip.of.your.server" declare -rx SLV_MSTRServerA_USER="noslave" declare -rx SLV_MSTRServerA_PASSWD="password" #Slave/Master ServerB (NodeB-web.yourdomian.co.uk) declare -rx SLV_MSTRServerB="ip.of.your.server" declare -rx SLV_MSTRServerB_USER="noslave" declare -rx SLV_MSTRServerB_PASSWD="password" #Slave/Master ServerC (NodeC-http.yourdomain.local) declare -rx SLV_MSTRServerC="localhost" declare -rx SLV_MSTRServerC_USER="noslave" declare -rx SLV_MSTRServerC_PASSWD="password" #Slave/Master ServerD (NodeD-beaver.yourdomain.local) declare -rx SLV_MSTRServerD="ip.of.your.server" declare -rx SLV_MSTRServerD_USER="noslave" declare -rx SLV_MSTRServerD_PASSWD="password" #Global Variables declare -a result #Definning Variable for Array declare -a SLV_MSTRServerS=($SLV_MSTRServerA $SLV_MSTRServerB $SLV_MSTRServerC $SLV_MSTRServerD) declare -a SLV_MSTRServerS_USERS=($SLV_MSTRServerA_USER $SLV_MSTRServerB_USER $SLV_MSTRServerC_USER $SLV_MSTRServerD_USER) declare -a SLV_MSTRServerS_PASSWD=($SLV_MSTRServerA_PASSWD $SLV_MSTRServerB_PASSWD $SLV_MSTRServerC_PASSWD $SLV_MSTRServerD_PASSWD ) declare -a SLV_ServerAppLS=("SLV_MAIL" "SLV_WEB" "SLV_HTTP" "SLV_BEVR") declare -a MSTR_ServerAppLS=("MSTR_MAIL" "MSTR_WEB" "MSTR_HTTP" "MSTR_BEVR") ########################################################### #Section-1.0:function-Command: My Mysql Servers are online# ########################################################### function FUNC_CHECK_SERVER_ONLINE_CMD { $CMD_MYSQL -h "$1" -u"$2" -p"$3" -e "show slave status\G" >/dev/null 2>&1 return $? } ########################################################### #Section-2.0: Function-Command:If Slave_IO_Running######### ########################################################### function FUNC_CHK_SLV_IO_RUN_CMD { echo $($CMD_MYSQL -h "$1" -u"$2" -p"$3" -e "show slave status\G" | $CMD_GREP Slave_IO_Running | awk '{ print $2 }' ) } ########################################################## #Section-3.0: Function-Command:If Slave_SQL_running####### ########################################################## function FUNC_CHK_SLV_SQL_RUN_CMD { echo $($CMD_MYSQL -h "$1" -u"$2" -p"$3" -e "show slave status\G" | $CMD_GREP Slave_SQL_Running | awk '{ print $2 }' ) } ########################################################## #Section-4.0: Function-Command:####### ########################################################## function FUNC_CHK_SLV_LOG_POS_CMD { echo $($CMD_MYSQL -h "$1" -u"$2" -p"$3" -e "show slave status\G" | $CMD_GREP Read_Master_Log_Pos | awk '{ print $2}' ) } ########################################################## #Section-5.0: Function-Command:####### ########################################################## function FUNC_CHK_MSTR_LOG_POS_CMD { echo $($CMD_MYSQL -h "$1" -u"$2" -p"$3" -e "show master status" | $CMD_GREP bin | cut -f2 ) } ########################################################### #Section-1.1: If all Mysql Server is Online################ ##Implementing Secton 1.0(ref:FUNC_CHECK_SERVER_ONLINE_CMD# ########################################################### function FUNC_CHECK_SERVER_ONLINE() { i=0 COUNT=${#SLV_MSTRServerS[*]} while [ $i -lt $COUNT ] do if ! $(FUNC_CHECK_SERVER_ONLINE_CMD "${SLV_MSTRServerS[$i]}" "${SLV_MSTRServerS_USERS[$i]}" "${SLV_MSTRServerS_PASSWD[$i]}" ) then echo " Server IP: ${SLV_MSTRServerS[$i]},is not running " exit $STATE_CRITICAL exit 99 fi i=$(($i+1)) done #echo "All Server are Online" #exit $STATE_OK } ########################################################### #Section-2.1: If Slave_IO_Running IS RUNNING OR NOT######## ##Implementing Secton 2.0(ref:FUNC_CHK_SLV_IO_RUN_CMD###### ########################################################### function FUNC_CHK_SLV_IO_RUN() { i=0 COUNT=${#SLV_MSTRServerS[*]} while [ $i -lt $COUNT ] do result[$i]=$(FUNC_CHK_SLV_IO_RUN_CMD "${SLV_MSTRServerS[$i]}" "${SLV_MSTRServerS_USERS[$i]}" "${SLV_MSTRServerS_PASSWD[$i]}" ) i=$(($i+1)) done i=0 while [ $i -lt $COUNT ] do if [ ${result[$i]} != "Yes" ] then echo "In Server IP: ${SLV_MSTRServerS[$i]},Slave_IO_running is not running " exit $STATE_CRITICAL fi i=$(($i + 1 )) done #echo "ALL Servers are running fine" #exit $STATE_OK } ########################################################### #Section-3.1: IF Slave_SQL_Running OR NOT################# ##Implementing Secton 3.0(ref:FUNC_CHK_SLV_SQL_RUN_CMD##### ########################################################### function FUNC_CHK_SLV_SQL_RUN() { i=0 COUNT=${#SLV_MSTRServerS[*]} while [ $i -lt $COUNT ] do result[$i]=$(FUNC_CHK_SLV_SQL_RUN_CMD "${SLV_MSTRServerS[$i]}" "${SLV_MSTRServerS_USERS[$i]}" "${SLV_MSTRServerS_PASSWD[$i]}" ) i=$(($i+1)) done i=0 while [ $i -lt $COUNT ] do if [ ${result[$i]} != "Yes" ] then echo "In Server IP: ${SLV_MSTRServerS[$i]},Slave_SQL_Running is not running " exit $STATE_CRITICAL fi i=$(($i + 1 )) done } ########################################################### #Section-4.1: GETTING MASTER LOG POSITION FROM EACH SLAVE## ##Implementing Secton 4.0(ref:FUNC_CHK_SLV_LOG_POS_CMD##### ########################################################### function FUNC_CHK_SLV_LOG_POS () { i=0 COUNT=${#SLV_MSTRServerS[*]} while [ $i -lt $COUNT ] do result[$i]=$(FUNC_CHK_SLV_LOG_POS_CMD "${SLV_MSTRServerS[$i]}" "${SLV_MSTRServerS_USERS[$i]}" "${SLV_MSTRServerS_PASSWD[$i]}" ) i=$(($i+1)) done i=0 while [ $i -lt $COUNT ] do eval ${SLV_ServerAppLS[$i]}=${result[$i]} i=$(($i + 1 )) done } ########################################################### #Section-5.1: GETTING MASTER LOG POSITION FROM EACH MASTER# ##Implementing Secton 5.0(ref:FUNC_CHK_MSTR_LOG_POS_CMD##### ########################################################### function FUNC_CHK_MSTR_LOG_POS () { i=0 COUNT=${#SLV_MSTRServerS[*]} while [ $i -lt $COUNT ] do result[$i]=$(FUNC_CHK_MSTR_LOG_POS_CMD "${SLV_MSTRServerS[$i]}" "${SLV_MSTRServerS_USERS[$i]}" "${SLV_MSTRServerS_PASSWD[$i]}" ) i=$(($i+1)) done i=0 while [ $i -lt $COUNT ] do eval ${MSTR_ServerAppLS[$i]}=${result[$i]} i=$(($i + 1 )) done } ######################################################################################### #Section-4.1/5.1: FIND OUT LOG POSITION DIFFERENCE####################################### ##Implementing Secton 4.1 and 5.1(ref:FUNC_CHK_SLV_LOG_POS) AND FUNC_CHK_MSTR_LOG_POS## ######################################################################################### function FUNC_FIND_LOG_POS_DIFF () { ################################################################ ##Calling FUNC_CHK_SRV_LOG_POS and FUNC_CHK_MSTR_LOG_POS######## ## To Get All the output from Servers########################### ################################################################ FUNC_CHK_SLV_LOG_POS FUNC_CHK_MSTR_LOG_POS echo "Master log position from each master(show master status)" echo "mail: $MSTR_MAIL" echo "web: $MSTR_WEB" echo "http: $MSTR_HTTP" echo " beaver: $MSTR_BEVR" echo "MAster log position from each Slave(show slave status) " echo "mail: $SLV_MAIL" echo "web: $SLV_WEB" echo "http: $SLV_HTTP" echo "beaver: $SLV_BEVR" ### note : $SLV_MAIL will be equal to $MSTR_BEVR ### Note : $SLV_WEB will be equal to $MSTR_MAIL ### Note : $SLV_HTTP will be equal to $MSTR_WEB ### Note : $SLV_BEVR will be equal to $MSTR_HTTP if [ $SLV_MAIL -ne $MSTR_BEVR ] then echo "Problem between Server Mail: $SLV_MAIL and Server BEVR:$MSTR_BEVR" exit $STATE_CRITICAL fi if [ $SLV_WEB -ne $MSTR_MAIL ] then echo "Problem between Server WEB:$SLV_WEB and Server MAIL:$MSTR_MAIL" exit $STATE_CRITICAL fi if [ $SLV_HTTP -ne $MSTR_WEB ] then echo "Problem between Server HTTP:$SLV_HTTP and Server WEB:$MSTR_WEB " exit $STATE_CRITICAL fi if [ $SLV_BEVR -ne $MSTR_HTTP ] then echo "Problem between Server BEVR:$SLV_BEVR and Server HTTP:$MSTR_HTTP" exit $STATE_CRITICAL fi } ###################################################################### #Calling all function from section [1.1,2.1,3.1,4.1,5.1]############# ###################################################################### FUNC_CHECK_SERVER_ONLINE FUNC_CHK_SLV_IO_RUN FUNC_CHK_SLV_SQL_RUN FUNC_FIND_LOG_POS_DIFF ##################################################################### ## If there is not any error from section[1.1,2.1,3.1,4.1,5.1]####### ## then show bellow commands to ensure nagios all OK ################ ##################################################################### #echo $SLV_HTTP #echo $SLV_BEVR #echo $MSTR_MAIL #echo $MSTR_WEB #echo $MSTR_HTTP #echo $MSTR_BEVR echo "ALL Servers are running fine" exit $STATE_OK |
Tags: Bash script to check mysql server replication, Bash Script to monitor Master/Master replication between 4 Mysql server, mysql replication check script, mysql replication script, Nagios script for Master/Master Mysql server replication, nagios script to check mysql replication