MySQL5.7一主两从MHA手工故障切换
发表于：2024-10-05 作者：千家信息网编辑
千家信息网最后更新 2024年10月05日，数据库架构：一主两从master：192.168.8.57slave1：192.168.8.58slave2：192.168.8.59manager：192.168.8.60MHA工具包：mha4my
千家信息网最后更新 2024年10月05日MySQL5.7一主两从MHA手工故障切换
数据库架构：一主两从
master：192.168.8.57
slave1：192.168.8.58
slave2：192.168.8.59
manager：192.168.8.60
MHA工具包：
mha4mysql-manager-0.58.tar.gz
mha4mysql-node-0.58.tar.gz
一、修改master_ip_online_change内容
| 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 | #!/usr/bin/env perl # Copyright (C) 2011 DeNA Co.,Ltd. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA use strict; use warnings FATAL => 'all' ; use Getopt::Long qw(:config pass_through) ; use Pod::Usage; use MHA::MasterMonitor; use MHA::MasterFailover; use MHA::MasterRotate; use MHA::ManagerConst; my $master_state = "" ; my $help ; my $version ; $| = 1; GetOptions( 'help' => \ $help , 'version' => \ $version , 'master_state=s' => \ $master_state ); my $exit_code = 1; if ( $version ) { print "masterha_master_switch version $MHA::ManagerConst::VERSION.\n" ; exit 0; } if ( $help ) { pod2usage(0); } if ( $master_state eq "dead" ) { $exit_code = MHA::MasterFailover::main( @ARGV ); } elsif ( $master_state eq "alive" ) { $exit_code = MHA::MasterRotate::main( @ARGV ); } else { pod2usage(1); } exit $exit_code ; # ############################################################################ # Documentation # ############################################################################ =pod =head1 NAME masterha_master_switch - Switching MySQL master server to one of other slave servers =head1 SYNOPSIS # For master failover masterha_master_switch --master_state=dead --global_conf=/etc/masterha_default.cnf --conf=/usr/local/masterha/conf/app1.cnf --dead_master_host=host1 # For online master switch masterha_master_switch --master_state=alive --global_conf=/etc/masterha_default.cnf --conf=/usr/local/masterha/conf/app1.cnf See online reference (http://code.google.com/p/mysql-master-ha/wiki/masterha_master_switch) for details. =head1 DESCRIPTION See online reference (http://code.google.com/p/mysql-master-ha/wiki/masterha_master_switch) for details. [root@manager MHA]# [root@manager MHA]# [root@manager MHA]# cat /usr/local/bin/master_ip_online_change #!/usr/bin/env perl # Copyright (C) 2011 DeNA Co.,Ltd. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA ## Note: This is a sample script and is not complete. Modify the script based on your environment. use strict; use warnings FATAL => 'all'; use Getopt::Long; use MHA::DBHelper; use MHA::NodeUtil; use Time::HiRes qw( sleep gettimeofday tv_interval ); use Data::Dumper; my $_tstart; my $_running_interval = 0.1; my ( $command, $orig_master_is_new_slave, $orig_master_host, $orig_master_ip, $orig_master_port, $orig_master_user, $orig_master_password, $orig_master_ssh_user, $new_master_host, $new_master_ip, $new_master_port, $new_master_user, $new_master_password, $new_master_ssh_user, ); GetOptions( 'command=s' => \$command, 'orig_master_is_new_slave' => \$orig_master_is_new_slave, 'orig_master_host=s' => \$orig_master_host, 'orig_master_ip=s' => \$orig_master_ip, 'orig_master_port=i' => \$orig_master_port, 'orig_master_user=s' => \$orig_master_user, 'orig_master_password=s' => \$orig_master_password, 'orig_master_ssh_user=s' => \$orig_master_ssh_user, 'new_master_host=s' => \$new_master_host, 'new_master_ip=s' => \$new_master_ip, 'new_master_port=i' => \$new_master_port, 'new_master_user=s' => \$new_master_user, 'new_master_password=s' => \$new_master_password, 'new_master_ssh_user=s' => \$new_master_ssh_user, ); exit &main(); sub current_time_us { my ( $sec, $microsec ) = gettimeofday(); my $curdate = localtime($sec); return $curdate . " " . sprintf( "d", $microsec ); } sub sleep_until { my $elapsed = tv_interval($_tstart); if ( $_running_interval > $elapsed ) { sleep( $_running_interval - $elapsed ); } } sub get_threads_util { my $dbh = shift; my $my_connection_id = shift; my $running_time_threshold = shift; my $type = shift; $running_time_threshold = 0 unless ($running_time_threshold); $type = 0 unless ($type); my @threads; my $sth = $dbh->prepare("SHOW PROCESSLIST"); $sth->execute(); while ( my $ref = $sth->fetchrow_hashref() ) { my $id = $ref->{Id}; my $user = $ref->{User}; my $host = $ref->{Host}; my $command = $ref->{Command}; my $state = $ref->{State}; my $query_time = $ref->{Time}; my $info = $ref->{Info}; $info =~ s/^\s*(.*?)\s*$/$1/ if defined($info); next if ( $my_connection_id == $id ); next if ( defined($query_time) && $query_time < $running_time_threshold ); next if ( defined($command) && $command eq "Binlog Dump" ); next if ( defined($user) && $user eq "system user" ); next if ( defined($command) && $command eq "Sleep" && defined($query_time) && $query_time >= 1 ); if ( $type >= 1 ) { next if ( defined($command) && $command eq "Sleep" ); next if ( defined($command) && $command eq "Connect" ); } if ( $type >= 2 ) { next if ( defined($info) && $info =~ m/^select/i ); next if ( defined($info) && $info =~ m/^show/i ); } push @threads, $ref; } return @threads; } sub main { if ( $command eq "stop" ) { ## Gracefully killing connections on the current master # 1. Set read_only= 1 on the new master # 2. DROP USER so that no app user can establish new connections # 3. Set read_only= 1 on the current master # 4. Kill current queries # * Any database access failure will result in script die. my $exit_code = 1; eval { ## Setting read_only=1 on the new master (to avoid accident) my $new_master_handler = new MHA::DBHelper(); # args: hostname, port, user, password, raise_error(die_on_error)_or_not $new_master_handler->connect( $new_master_ip, $new_master_port, $new_master_user, $new_master_password, 1 ); print current_time_us() . " Set read_only on the new master.. "; $new_master_handler->enable_read_only(); if ( $new_master_handler->is_read_only() ) { print "ok.\n"; } else { die "Failed!\n"; } $new_master_handler->disconnect(); # Connecting to the orig master, die if any database error happens my $orig_master_handler = new MHA::DBHelper(); $orig_master_handler->connect( $orig_master_ip, $orig_master_port, $orig_master_user, $orig_master_password, 1 ); ## Drop application user so that nobody can connect. Disabling per-session binlog beforehand $orig_master_handler->disable_log_bin_local(); print current_time_us() . " Drpping app user on the orig master..\n"; #FIXME_xxx_drop_app_user($orig_master_handler); ## Waiting for N * 100 milliseconds so that current connections can exit my $time_until_read_only = 15; $_tstart = [gettimeofday]; my @threads = get_threads_util( $orig_master_handler->{dbh}, $orig_master_handler->{connection_id} ); while ( $time_until_read_only > 0 && $#threads >= 0 ) { if ( $time_until_read_only % 5 == 0 ) { printf "%s Waiting all running %d threads are disconnected.. (max %d milliseconds)\n", current_time_us(), $#threads + 1, $time_until_read_only * 100; if ( $#threads < 5 ) { print Data::Dumper->new( [$_] )->Indent(0)->Terse(1)->Dump . "\n" foreach (@threads); } } sleep_until(); $_tstart = [gettimeofday]; $time_until_read_only--; @threads = get_threads_util( $orig_master_handler->{dbh}, $orig_master_handler->{connection_id} ); } ## Setting read_only=1 on the current master so that nobody(except SUPER) can write print current_time_us() . " Set read_only=1 on the orig master.. "; $orig_master_handler->enable_read_only(); if ( $orig_master_handler->is_read_only() ) { print "ok.\n"; } else { die "Failed!\n"; } ## Waiting for M * 100 milliseconds so that current update queries can complete my $time_until_kill_threads = 5; @threads = get_threads_util( $orig_master_handler->{dbh}, $orig_master_handler->{connection_id} ); while ( $time_until_kill_threads > 0 && $#threads >= 0 ) { if ( $time_until_kill_threads % 5 == 0 ) { printf "%s Waiting all running %d queries are disconnected.. (max %d milliseconds)\n", current_time_us(), $#threads + 1, $time_until_kill_threads * 100; if ( $#threads < 5 ) { print Data::Dumper->new( [$_] )->Indent(0)->Terse(1)->Dump . "\n" foreach (@threads); } } sleep_until(); $_tstart = [gettimeofday]; $time_until_kill_threads--; @threads = get_threads_util( $orig_master_handler->{dbh}, $orig_master_handler->{connection_id} ); } ## Terminating all threads print current_time_us() . " Killing all application threads..\n"; $orig_master_handler->kill_threads(@threads) if ( $#threads >= 0 ); print current_time_us() . " done.\n"; $orig_master_handler->enable_log_bin_local(); $orig_master_handler->disconnect(); ## After finishing the script, MHA executes FLUSH TABLES WITH READ LOCK $exit_code = 0; }; if ($@) { warn "Got Error: $@\n"; exit $exit_code; } exit $exit_code; } elsif ( $command eq "start" ) { ## Activating master ip on the new master # 1. Create app user with write privileges # 2. Moving backup script if needed # 3. Register new master's ip to the catalog database # We don't return error even though activating updatable accounts/ip failed so that we don't interrupt slaves' recovery. # If exit code is 0 or 10, MHA does not abort my $exit_code = 10; eval { my $new_master_handler = new MHA::DBHelper(); # args: hostname, port, user, password, raise_error_or_not $new_master_handler->connect( $new_master_ip, $new_master_port, $new_master_user, $new_master_password, 1 ); ## Set read_only=0 on the new master $new_master_handler->disable_log_bin_local(); print current_time_us() . " Set read_only=0 on the new master.\n"; $new_master_handler->disable_read_only(); ## Creating an app user on the new master print current_time_us() . " Creating app user on the new master..\n"; FIXME_xxx_create_app_user($new_master_handler); $new_master_handler->enable_log_bin_local(); $new_master_handler->disconnect(); ## Update master ip on the catalog database, etc $exit_code = 0; }; if ($@) { warn "Got Error: $@\n"; exit $exit_code; } exit $exit_code; } elsif ( $command eq "status" ) { # do nothing exit 0; } else { &usage(); exit 1; } } sub usage { print "Usage: master_ip_online_change --command=start|stop|status --orig_master_host=host --orig_master_ip=ip --orig_master_port=port --new_master_host=host --new_master_ip=ip --new_master_port=port\n"; die; } |
二、停止MHA监控程序
| 1 | masterha_stop --conf= /etc/masterha/app1 .cnf |
三、手工停止主库MySQL进程，模拟故障发生
mysqladmin -uroot -pmysql shutdown
四、手工故障切换
masterha_master_switch --conf=/etc/masterha/app1.cnf --master_state=dead --dead_master_host=192.168.8.57 --dead_master_port=3306 --new_master_host=192.168.8.58 --new_master_port=3306 --ignore_last_failover
--dead_master_ip=is not set. Using 192.168.8.57.Fri Oct 26 16:18:05 2018 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.Fri Oct 26 16:18:05 2018 - [info] Reading application default configuration from /etc/masterha/app1.cnf..Fri Oct 26 16:18:05 2018 - [info] Reading server configuration from /etc/masterha/app1.cnf..Fri Oct 26 16:18:05 2018 - [info] MHA::MasterFailover version 0.58.Fri Oct 26 16:18:05 2018 - [info] Starting master failover.Fri Oct 26 16:18:05 2018 - [info] Fri Oct 26 16:18:05 2018 - [info] * Phase 1: Configuration Check Phase..Fri Oct 26 16:18:05 2018 - [info] Fri Oct 26 16:18:07 2018 - [info] GTID failover mode = 1Fri Oct 26 16:18:07 2018 - [info] Dead Servers:Fri Oct 26 16:18:07 2018 - [info] 192.168.8.57(192.168.8.57:3306)Fri Oct 26 16:18:07 2018 - [info] Checking master reachability via MySQL(double check)...Fri Oct 26 16:18:07 2018 - [info] ok.Fri Oct 26 16:18:07 2018 - [info] Alive Servers:Fri Oct 26 16:18:07 2018 - [info] 192.168.8.58(192.168.8.58:3306)Fri Oct 26 16:18:07 2018 - [info] 192.168.8.59(192.168.8.59:3306)Fri Oct 26 16:18:07 2018 - [info] Alive Slaves:Fri Oct 26 16:18:07 2018 - [info] 192.168.8.58(192.168.8.58:3306) Version=5.7.23-log (oldest major version between slaves) log-bin:enabledFri Oct 26 16:18:07 2018 - [info] GTID ONFri Oct 26 16:18:07 2018 - [info] Replicating from 192.168.8.57(192.168.8.57:3306)Fri Oct 26 16:18:07 2018 - [info] 192.168.8.59(192.168.8.59:3306) Version=5.7.23-log (oldest major version between slaves) log-bin:enabledFri Oct 26 16:18:07 2018 - [info] GTID ONFri Oct 26 16:18:07 2018 - [info] Replicating from 192.168.8.57(192.168.8.57:3306)Master 192.168.8.57(192.168.8.57:3306) is dead. Proceed? (yes/NO): yesFri Oct 26 16:18:14 2018 - [info] Starting GTID based failover.Fri Oct 26 16:18:14 2018 - [info] Fri Oct 26 16:18:14 2018 - [info] ** Phase 1: Configuration Check Phase completed.Fri Oct 26 16:18:14 2018 - [info] Fri Oct 26 16:18:14 2018 - [info] * Phase 2: Dead Master Shutdown Phase..Fri Oct 26 16:18:14 2018 - [info] Fri Oct 26 16:18:14 2018 - [info] HealthCheck: SSH to 192.168.8.57 is reachable.Fri Oct 26 16:18:15 2018 - [info] Forcing shutdown so that applications never connect to the current master..Fri Oct 26 16:18:15 2018 - [info] Executing master IP deactivation script:Fri Oct 26 16:18:15 2018 - [info] /usr/local/bin/master_ip_failover --orig_master_host=192.168.8.57 --orig_master_ip=192.168.8.57 --orig_master_port=3306 --command=stopssh --ssh_user=root Fri Oct 26 16:18:15 2018 - [info] done.Fri Oct 26 16:18:15 2018 - [warning] shutdown_script is not set. Skipping explicit shutting down of the dead master.Fri Oct 26 16:18:15 2018 - [info] * Phase 2: Dead Master Shutdown Phase completed.Fri Oct 26 16:18:15 2018 - [info] Fri Oct 26 16:18:15 2018 - [info] * Phase 3: Master Recovery Phase..Fri Oct 26 16:18:15 2018 - [info] Fri Oct 26 16:18:15 2018 - [info] * Phase 3.1: Getting Latest Slaves Phase..Fri Oct 26 16:18:15 2018 - [info] Fri Oct 26 16:18:15 2018 - [info] The latest binary log file/position on all slaves is mysql-bin.000012:359Fri Oct 26 16:18:15 2018 - [info] Retrieved Gtid Set: a92f70a4-d5ea-11e8-af28-080027c0450d:10Fri Oct 26 16:18:15 2018 - [info] Latest slaves (Slaves that received relay log files to the latest):Fri Oct 26 16:18:15 2018 - [info] 192.168.8.58(192.168.8.58:3306) Version=5.7.23-log (oldest major version between slaves) log-bin:enabledFri Oct 26 16:18:15 2018 - [info] GTID ONFri Oct 26 16:18:15 2018 - [info] Replicating from 192.168.8.57(192.168.8.57:3306)Fri Oct 26 16:18:15 2018 - [info] 192.168.8.59(192.168.8.59:3306) Version=5.7.23-log (oldest major version between slaves) log-bin:enabledFri Oct 26 16:18:15 2018 - [info] GTID ONFri Oct 26 16:18:15 2018 - [info] Replicating from 192.168.8.57(192.168.8.57:3306)Fri Oct 26 16:18:15 2018 - [info] The oldest binary log file/position on all slaves is mysql-bin.000012:359Fri Oct 26 16:18:15 2018 - [info] Retrieved Gtid Set: a92f70a4-d5ea-11e8-af28-080027c0450d:10Fri Oct 26 16:18:15 2018 - [info] Oldest slaves:Fri Oct 26 16:18:15 2018 - [info] 192.168.8.58(192.168.8.58:3306) Version=5.7.23-log (oldest major version between slaves) log-bin:enabledFri Oct 26 16:18:15 2018 - [info] GTID ONFri Oct 26 16:18:15 2018 - [info] Replicating from 192.168.8.57(192.168.8.57:3306)Fri Oct 26 16:18:15 2018 - [info] 192.168.8.59(192.168.8.59:3306) Version=5.7.23-log (oldest major version between slaves) log-bin:enabledFri Oct 26 16:18:15 2018 - [info] GTID ONFri Oct 26 16:18:15 2018 - [info] Replicating from 192.168.8.57(192.168.8.57:3306)Fri Oct 26 16:18:15 2018 - [info] Fri Oct 26 16:18:15 2018 - [info] * Phase 3.3: Determining New Master Phase..Fri Oct 26 16:18:15 2018 - [info] Fri Oct 26 16:18:15 2018 - [info] 192.168.8.58 can be new master.Fri Oct 26 16:18:15 2018 - [info] New master is 192.168.8.58(192.168.8.58:3306)Fri Oct 26 16:18:15 2018 - [info] Starting master failover..Fri Oct 26 16:18:15 2018 - [info] From:192.168.8.57(192.168.8.57:3306) (current master) +--192.168.8.58(192.168.8.58:3306) +--192.168.8.59(192.168.8.59:3306)To:192.168.8.58(192.168.8.58:3306) (new master) +--192.168.8.59(192.168.8.59:3306)Starting master switch from 192.168.8.57(192.168.8.57:3306) to 192.168.8.58(192.168.8.58:3306)? (yes/NO): yesFri Oct 26 16:18:22 2018 - [info] New master decided manually is 192.168.8.58(192.168.8.58:3306)Fri Oct 26 16:18:22 2018 - [info] Fri Oct 26 16:18:22 2018 - [info] * Phase 3.3: New Master Recovery Phase..Fri Oct 26 16:18:22 2018 - [info] Fri Oct 26 16:18:22 2018 - [info] Waiting all logs to be applied.. Fri Oct 26 16:18:22 2018 - [info] done.Fri Oct 26 16:18:22 2018 - [info] Getting new master's binlog name and position..Fri Oct 26 16:18:22 2018 - [info] mysql-bin.000011:565Fri Oct 26 16:18:22 2018 - [info] All other slaves should start replication from here. Statement should be: CHANGE MASTER TO MASTER_HOST='192.168.8.58', MASTER_PORT=3306, MASTER_AUTO_POSITION=1, MASTER_USER='repl', MASTER_PASSWORD='xxx';Fri Oct 26 16:18:22 2018 - [info] Master Recovery succeeded. File:Pos:Exec_Gtid_Set: mysql-bin.000011, 565, a92f70a4-d5ea-11e8-af28-080027c0450d:1-10,a92f70a4-d5ea-11e8-af28-080027c0450f:1-6Fri Oct 26 16:18:22 2018 - [info] Executing master IP activate script:Fri Oct 26 16:18:22 2018 - [info] /usr/local/bin/master_ip_failover --command=start --ssh_user=root --orig_master_host=192.168.8.57 --orig_master_ip=192.168.8.57 --orig_master_port=3306 --new_master_host=192.168.8.58 --new_master_ip=192.168.8.58 --new_master_port=3306 --new_master_user='root' --new_master_password=xxxSet read_only=0 on the new master.Creating app user on the new master..Undefined subroutine &main::FIXME_xxx_create_user called at /usr/local/bin/master_ip_failover line 94.Fri Oct 26 16:18:22 2018 - [error][/usr/lib/perl5/vendor_perl/MHA/MasterFailover.pm, ln1612] Failed to activate master IP address for 192.168.8.58(192.168.8.58:3306) with return code 10:0Fri Oct 26 16:18:22 2018 - [warning] Proceeding.Fri Oct 26 16:18:22 2018 - [info] ** Finished master recovery successfully.Fri Oct 26 16:18:22 2018 - [info] * Phase 3: Master Recovery Phase completed.Fri Oct 26 16:18:22 2018 - [info] Fri Oct 26 16:18:22 2018 - [info] * Phase 4: Slaves Recovery Phase..Fri Oct 26 16:18:22 2018 - [info] Fri Oct 26 16:18:22 2018 - [info] Fri Oct 26 16:18:22 2018 - [info] * Phase 4.1: Starting Slaves in parallel..Fri Oct 26 16:18:22 2018 - [info] Fri Oct 26 16:18:22 2018 - [info] -- Slave recovery on host 192.168.8.59(192.168.8.59:3306) started, pid: 5792. Check tmp log /var/log/masterha/app1/192.168.8.59_3306_20181026161805.log if it takes time..Fri Oct 26 16:18:23 2018 - [info] Fri Oct 26 16:18:23 2018 - [info] Log messages from 192.168.8.59 ...Fri Oct 26 16:18:23 2018 - [info] Fri Oct 26 16:18:22 2018 - [info] Resetting slave 192.168.8.59(192.168.8.59:3306) and starting replication from the new master 192.168.8.58(192.168.8.58:3306)..Fri Oct 26 16:18:22 2018 - [info] Executed CHANGE MASTER.Fri Oct 26 16:18:22 2018 - [info] Slave started.Fri Oct 26 16:18:22 2018 - [info] gtid_wait(a92f70a4-d5ea-11e8-af28-080027c0450d:1-10,a92f70a4-d5ea-11e8-af28-080027c0450f:1-6) completed on 192.168.8.59(192.168.8.59:3306). Executed 0 events.Fri Oct 26 16:18:23 2018 - [info] End of log messages from 192.168.8.59.Fri Oct 26 16:18:23 2018 - [info] -- Slave on host 192.168.8.59(192.168.8.59:3306) started.Fri Oct 26 16:18:23 2018 - [info] All new slave servers recovered successfully.Fri Oct 26 16:18:23 2018 - [info] Fri Oct 26 16:18:23 2018 - [info] * Phase 5: New master cleanup phase..Fri Oct 26 16:18:23 2018 - [info] Fri Oct 26 16:18:23 2018 - [info] Resetting slave info on the new master..Fri Oct 26 16:18:23 2018 - [info] 192.168.8.58: Resetting slave info succeeded.Fri Oct 26 16:18:23 2018 - [info] Master failover to 192.168.8.58(192.168.8.58:3306) completed successfully.Fri Oct 26 16:18:23 2018 - [info] ----- Failover Report -----app1: MySQL Master failover 192.168.8.57(192.168.8.57:3306) to 192.168.8.58(192.168.8.58:3306) succeededMaster 192.168.8.57(192.168.8.57:3306) is down!Check MHA Manager logs at manager for details.Started manual(interactive) failover.Invalidated master IP address on 192.168.8.57(192.168.8.57:3306)Selected 192.168.8.58(192.168.8.58:3306) as a new master.192.168.8.58(192.168.8.58:3306): OK: Applying all logs succeeded.Failed to activate master IP address for 192.168.8.58(192.168.8.58:3306) with return code 10:0192.168.8.59(192.168.8.59:3306): OK: Slave started, replicating from 192.168.8.58(192.168.8.58:3306)192.168.8.58(192.168.8.58:3306): Resetting slave info succeeded.Master failover to 192.168.8.58(192.168.8.58:3306) completed successfully.Fri Oct 26 16:18:23 2018 - [info] Sending mail..
五、查看数据库状态
192.168.8.58
mysql> show slave status \GEmpty set (0.00 sec)mysql> show variables like '%read_only%';+-----------------------+-------+| Variable_name | Value |+-----------------------+-------+| innodb_read_only | OFF || read_only | OFF || super_read_only | OFF || transaction_read_only | OFF || tx_read_only | OFF |+-----------------------+-------+
当前节点变成主库，slave进程停止，只读模式关闭
192.168.8.59
mysql> show slave status \G*************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.8.58 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000011 Read_Master_Log_Pos: 565 Relay_Log_File: slave2-relay-bin.000002 Relay_Log_Pos: 414 Relay_Master_Log_File: mysql-bin.000011 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 565 Relay_Log_Space: 622 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 58 Master_UUID: a92f70a4-d5ea-11e8-af28-080027c0450f Master_Info_File: /mysql/data/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: a92f70a4-d5ea-11e8-af28-080027c0450b:1-4,a92f70a4-d5ea-11e8-af28-080027c0450d:1-10,a92f70a4-d5ea-11e8-af28-080027c0450f:1-6 Auto_Position: 1 Replicate_Rewrite_DB: Channel_Name: Master_TLS_Version: 1 row in set (0.00 sec)mysql> show variables like '%read_only%';+-----------------------+-------+| Variable_name | Value |+-----------------------+-------+| innodb_read_only | OFF || read_only | ON || super_read_only | OFF || transaction_read_only | OFF || tx_read_only | OFF |+-----------------------+-------+
此节点主库变成192.168.8.58，只读模式不变
六、查看复制状态
当前主库和从库数据状态
mysql> show tables;+----------------+| Tables_in_test |+----------------+| t1 || t2 || t3 || t4 || t5 || t6 || t7 || t8 || t9 |+----------------+
在主库192.168.8.58创建测试表
mysql> create table t10 (id int(6));Query OK, 0 rows affected (0.35 sec)mysql> show tables;+----------------+| Tables_in_test |+----------------+| t1 || t10 || t2 || t3 || t4 || t5 || t6 || t7 || t8 || t9 |+----------------+
在从库192.168.8.59查看数据同步情况
mysql> show tables;+----------------+| Tables_in_test |+----------------+| t1 || t10 || t2 || t3 || t4 || t5 || t6 || t7 || t8 || t9 |+----------------+
测试表t10已经同步，复制正常。
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