使用yum如何安装两个mysql 或者运行两个mysql

有人 发布于 2016/04/11 10:47
阅读 513
收藏 0
root       1897  0.0  0.0 108332  1556 ?        S    09:07   0:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql/ --socket=/var/lib/mysql/mysql.sock --pid-file=/var/run/mysqld/mysqld.pid --basedir=/usr --user=mysql

	mysql      2374  0.1 43.7 2571824 835044 ?      Sl   09:07   0:09 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql/ --plugin-dir=/usr/lib64/mysql/plugin --user=mysql --log-error=/var/lib/mysql/mysql-error.log --open-files-limit=65535 --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/lib/mysql/mysql.sock



可以看到 运行状态。


有办法再启动一个mysql吗



加载中
0
Feng_Yu
Feng_Yu
有。mysql_muti
0
爱生活_爱JAVA
爱生活_爱JAVA
为什么要用二个?弄二个库不就行了吗?
0
幻视Vision
幻视Vision
mysql 本来就支持多实例运行。加载不同的配置文件运行即可。
0
和风冷冽
和风冷冽
mysql多实例的安装(同一台服务器上)

一、生成第一个mysql实例:
1. 下载mysql压缩包并且解压缩到/home/目录:
cd /home
tar zxvf /root/mysql-5.5.28-linux2.6-x86_64.tgz
mv mysql-5.5.28-linux2.6-x86_64 mysql
cd mysql

2. 生成配置文件conf/my.cnf
[client]
port            = 3306
socket          = /tmp/mysql.sock

[mysqld]
port            = 3306
socket          = /home/mysql/socket/mysql.sock
skip-external-locking
skip-name-resolve
#interactive_timeout=600
#wait_timeout=600
default-storage-engine=InnoDB

datadir                 = /home/mysql/data/

thread_concurrency      = 16
thread_cache_size       = 64
key_buffer_size         = 128M
max_allowed_packet      = 1M
table_open_cache        = 2048
sort_buffer_size        = 2M
read_buffer_size        = 2M
read_rnd_buffer_size    = 8M
query_cache_size        = 16M
max_heap_table_size     = 128M
tmp_table_size          = 128M
join_buffer_size        = 1024K
max_connections         = 512
group_concat_max_len = 200000
low_priority_updates    = 1
concurrent_insert       = 2

#innodb
innodb_log_group_home_dir = /home/mysql/log/innodblog

log-slow-queries        = /home/mysql/log/slow.log
long_query_time         = 1
#log-queries-not-using-indexes
auto-increment-increment = 1
auto-increment-offset    = 1

binlog_format           = mixed
server-id               = 1
log-bin                 = /home/mysql/log/mysql-bin.log

binlog-ignore-db        = mysql
binlog-ignore-db        = test
binlog-ignore-db        = information_schema
binlog-ignore-db        = performance_schema

[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash

[myisamchk]
key_buffer_size = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout

启动服务的脚本mysql.server复制到/etc/init.d/目录下
cp mysql.server /etc/init.d/mysqld

#!/bin/sh

basedir=/home/mysql
datadir=/home/mysql/data

# Default value, in seconds, afterwhich the script should timeout waiting
# for server start.
# Value here is overriden by value in my.cnf.
# 0 means don't wait at all
# Negative numbers mean to wait indefinitely
service_startup_timeout=900

# Lock directory for RedHat / SuSE.
lockdir='/var/lock/subsys'
lock_file_path="$lockdir/mysql"

# The following variables are only set for letting mysql.server find things.

# Set some defaults
mysqld_pid_file_path=
if test -z "$basedir"
then
  basedir=/usr/local/mysql
  bindir=/usr/local/mysql/bin
  if test -z "$datadir"
  then
    datadir=/usr/local/mysql/data
  fi
  sbindir=/usr/local/mysql/bin
  libexecdir=/usr/local/mysql/bin
else
  bindir="$basedir/bin"
  if test -z "$datadir"
  then
    datadir="$basedir/data"
  fi
  sbindir="$basedir/sbin"
  libexecdir="$basedir/libexec"
fi

# datadir_set is used to determine if datadir was set (and so should be
# *not* set inside of the --basedir= handler.)
datadir_set=

#
# Use LSB init script functions for printing messages, if possible
#
lsb_functions="/lib/lsb/init-functions"
if test -f $lsb_functions ; then
  . $lsb_functions
else
  log_success_msg()
  {
    echo " SUCCESS! $@"
  }
  log_failure_msg()
  {
    echo " ERROR! $@"
  }
fi

PATH="/sbin:/usr/sbin:/bin:/usr/bin:$basedir/bin"
export PATH

mode=$1    # start or stop

[ $# -ge 1 ] && shift


other_args="$*"   # uncommon, but needed when called from an RPM upgrade action
           # Expected: "--skip-networking --skip-grant-tables"
           # They are not checked here, intentionally, as it is the resposibility
           # of the "spec" file author to give correct arguments only.

case `echo "testing\c"`,`echo -n testing` in
    *c*,-n*) echo_n=   echo_c=     ;;
    *c*,*)   echo_n=-n echo_c=     ;;
    *)       echo_n=   echo_c='\c' ;;
esac

parse_server_arguments() {
  for arg do
    case "$arg" in
      --basedir=*)  basedir=`echo "$arg" | sed -e 's/^[^=]*=//'`
                    bindir="$basedir/bin"
                    if test -z "$datadir_set"; then
                      datadir="$basedir/data"
                    fi
                    sbindir="$basedir/sbin"
                    libexecdir="$basedir/libexec"
        ;;
      --datadir=*)  datadir=`echo "$arg" | sed -e 's/^[^=]*=//'`
                    datadir_set=1
        ;;
      --pid-file=*) mysqld_pid_file_path=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
      --service-startup-timeout=*) service_startup_timeout=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
    esac
  done
}

wait_for_pid () {
  verb="$1"           # created | removed
  pid="$2"            # process ID of the program operating on the pid-file
  pid_file_path="$3" # path to the PID file.

  i=0
  avoid_race_condition="by checking again"

  while test $i -ne $service_startup_timeout ; do

    case "$verb" in
      'created')
        # wait for a PID-file to pop into existence.
        test -s "$pid_file_path" && i='' && break
        ;;
      'removed')
        # wait for this PID-file to disappear
        test ! -s "$pid_file_path" && i='' && break
        ;;
      *)
        echo "wait_for_pid () usage: wait_for_pid created|removed pid pid_file_path"
        exit 1
        ;;
    esac

    # if server isn't running, then pid-file will never be updated
    if test -n "$pid"; then
      if kill -0 "$pid" 2>/dev/null; then
        :  # the server still runs
      else
        # The server may have exited between the last pid-file check and now. 
        if test -n "$avoid_race_condition"; then
          avoid_race_condition=""
          continue  # Check again.
        fi

        # there's nothing that will affect the file.
        log_failure_msg "The server quit without updating PID file ($pid_file_path)."
        return 1  # not waiting any more.
      fi
    fi

    echo $echo_n ".$echo_c"
    i=`expr $i + 1`
    sleep 1

  done

  if test -z "$i" ; then
    log_success_msg
    return 0
  else
    log_failure_msg
    return 1
  fi
}

# Get arguments from the my.cnf file,
# the only group, which is read from now on is [mysqld]
if test -x ./bin/my_print_defaults
then
  print_defaults="./bin/my_print_defaults"
elif test -x $bindir/my_print_defaults
then
  print_defaults="$bindir/my_print_defaults"
elif test -x $bindir/mysql_print_defaults
then
  print_defaults="$bindir/mysql_print_defaults"
else
  # Try to find basedir in /etc/my.cnf
  conf=/etc/my.cnf
  print_defaults=
  if test -r $conf
  then
    subpat='^[^=]*basedir[^=]*=\(.*\)$'
    dirs=`sed -e "/$subpat/!d" -e 's//\1/' $conf`
    for d in $dirs
    do
      d=`echo $d | sed -e 's/[  ]//g'`
      if test -x "$d/bin/my_print_defaults"
      then
        print_defaults="$d/bin/my_print_defaults"
        break
      fi
      if test -x "$d/bin/mysql_print_defaults"
      then
        print_defaults="$d/bin/mysql_print_defaults"
        break
      fi
    done
  fi

  # Hope it's in the PATH ... but I doubt it
  test -z "$print_defaults" && print_defaults="my_print_defaults"
fi

#
# Read defaults file from 'basedir'.   If there is no defaults file there
# check if it's in the old (depricated) place (datadir) and read it from there
#

extra_args=""
if test -r "$basedir/my.cnf"
then
  extra_args="-e $basedir/my.cnf"
else
  if test -r "$datadir/my.cnf"
  then
    extra_args="-e $datadir/my.cnf"
  fi
fi

parse_server_arguments `$print_defaults $extra_args mysqld server mysql_server mysql.server`

#
# Set pid file if not given
#
if test -z "$mysqld_pid_file_path"
then
  mysqld_pid_file_path=$datadir/`hostname`.pid
else
  case "$mysqld_pid_file_path" in
    /* ) ;;
    * )  mysqld_pid_file_path="$datadir/$mysqld_pid_file_path" ;;
  esac
fi

case "$mode" in
  'start')
    # Start daemon

    # Safeguard (relative paths, core dumps..)
    cd $basedir

    echo $echo_n "Starting MySQL"
    if test -x $bindir/mysqld_safe
    then
      # Give extra arguments to mysqld with the my.cnf file. This script
      # may be overwritten at next upgrade.
      $bindir/mysqld_safe --defaults-file=$basedir/conf/my.cnf  --datadir="$datadir" --pid-file="$mysqld_pid_file_path" $other_args >/dev/null 2>&1 &
      wait_for_pid created "$!" "$mysqld_pid_file_path"; return_value=$?

      # Make lock for RedHat / SuSE
      if test -w "$lockdir"
      then
        touch "$lock_file_path"
      fi

      exit $return_value
    else
      log_failure_msg "Couldn't find MySQL server ($bindir/mysqld_safe)"
    fi
    ;;

  'stop')
    # Stop daemon. We use a signal here to avoid having to know the
    # root password.

    if test -s "$mysqld_pid_file_path"
    then
      mysqld_pid=`cat "$mysqld_pid_file_path"`

      if (kill -0 $mysqld_pid 2>/dev/null)
      then
        echo $echo_n "Shutting down MySQL"
        kill $mysqld_pid
        # mysqld should remove the pid file when it exits, so wait for it.
        wait_for_pid removed "$mysqld_pid" "$mysqld_pid_file_path"; return_value=$?
      else
        log_failure_msg "MySQL server process #$mysqld_pid is not running!"
        rm "$mysqld_pid_file_path"
      fi

      # Delete lock for RedHat / SuSE
      if test -f "$lock_file_path"
      then
        rm -f "$lock_file_path"
      fi
      exit $return_value
    else
      log_failure_msg "MySQL server PID file could not be found!"
    fi
    ;;

  'restart')
    # Stop the service and regardless of whether it was
    # running or not, start it again.
    if $0 stop  $other_args; then
      $0 start $other_args
    else
      log_failure_msg "Failed to stop running server, so refusing to try to start."
      exit 1
    fi
    ;;

  'reload'|'force-reload')
    if test -s "$mysqld_pid_file_path" ; then
      read mysqld_pid <  "$mysqld_pid_file_path"
      kill -HUP $mysqld_pid && log_success_msg "Reloading service MySQL"
      touch "$mysqld_pid_file_path"
    else
      log_failure_msg "MySQL PID file could not be found!"
      exit 1
    fi
    ;;
  'status')
    # First, check to see if pid file exists
    if test -s "$mysqld_pid_file_path" ; then
      read mysqld_pid < "$mysqld_pid_file_path"
      if kill -0 $mysqld_pid 2>/dev/null ; then
        log_success_msg "MySQL running ($mysqld_pid)"
        exit 0
      else
        log_failure_msg "MySQL is not running, but PID file exists"
        exit 1
      fi
    else
      # Try to find appropriate mysqld process
      mysqld_pid=`pidof $libexecdir/mysqld`
      if test -z $mysqld_pid ; then
        if test -f "$lock_file_path" ; then
          log_failure_msg "MySQL is not running, but lock file ($lock_file_path) exists"
          exit 2
        fi
        log_failure_msg "MySQL is not running"
        exit 3
      else
        log_failure_msg "MySQL is running but PID file could not be found"
        exit 4
      fi
    fi
    ;;
    *)
      # usage
      basename=`basename "$0"`
      echo "Usage: $basename  {start|stop|restart|reload|force-reload|status}  [ MySQL server options ]"
      exit 1
    ;;
esac

exit 0

3. 初始化
chown -R mysql .
chgrp -R mysql .
chown -R root .
chown -R mysql data
mkdir log socket run
mkdir log/innodblog
touch log/slow.log
chown -R mysql:mysql log socket run conf
scripts/mysql_install_db --user=mysql --basedir=/home/mysql --datadir=/home/mysql/data/ --defaults-file=/home/mysql/conf/my.cnf

4. 启动服务
用脚本启动:
/home/mysql/mysql.server start

用上面脚本启动有问题,可以用以下命令行启动:
/home/mysql/bin/mysqld_safe --defaults-file=/home/mysql/conf/my.cnf --datadir=/home/mysql/data --pid-file=/home/mysql/data/主机名.pid

5. 调试服务
如果服务启动有错误,请查看错误日志文件,文件是/home/mysql/data/主机名.err。

6. 进入mysql
确认mysql服务开启后进行下列操作:
mkdir -p /var/lib/mysql
ln -s /var/lib/mysql/mysql.sock /tmp/mysql.sock
修改mysql默认去寻找sock的路径,只需要做一次
进入mysql:
bin/mysql  --port=3306 -uroot -p --socket=socket/mysql.sock
需要指定对应的端口和sock路径

二、生成第二个或更多mysql实例:
1. 下载mysql并且解压缩到/home/目录:
cd /home
tar zxvf /root/mysql-5.5.28-linux2.6-x86_64.tgz
mv mysql-5.5.28-linux2.6-x86_64 mysql-1(或mysql-2、mysql-3。。。)
cd mysql-1

2. 初始化
借鉴第一个实例的初始化命令

3. 配置文件conf/my.cnf,请借鉴上面的配置文件内容,只有红色字体的行需要修改(包括监听端口和一些目录):
[client]
port            = 3306
socket          = /tmp/mysql.sock

[mysqld]
port            = 3307
socket          = /home/mysql-1/socket/mysql.sock
skip-external-locking
skip-name-resolve
#interactive_timeout=600
#wait_timeout=600
default-storage-engine=InnoDB

datadir                 = /home/mysql-1/data/

thread_concurrency      = 16
thread_cache_size       = 64
key_buffer_size         = 128M
max_allowed_packet      = 1M
table_open_cache        = 2048
sort_buffer_size        = 2M
read_buffer_size        = 2M
read_rnd_buffer_size    = 8M
query_cache_size        = 16M
max_heap_table_size     = 128M
tmp_table_size          = 128M
join_buffer_size        = 1024K
max_connections         = 512
group_concat_max_len = 200000
low_priority_updates    = 1
concurrent_insert       = 2

#innodb
innodb_log_group_home_dir = /home/mysql-1/log/innodblog

log-slow-queries        = /home/mysql-1/log/slow.log
long_query_time         = 1
#log-queries-not-using-indexes
auto-increment-increment = 1
auto-increment-offset    = 1

binlog_format           = mixed
server-id               = 1
log-bin                 = /home/mysql-1/log/mysql-bin.log

binlog-ignore-db        = mysql
binlog-ignore-db        = test
binlog-ignore-db        = information_schema
binlog-ignore-db        = performance_schema

[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash

[myisamchk]
key_buffer_size = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout

4. 启动脚本
修改脚本中红色字体部分,然后可以用于启动、关闭mysqld服务。

5. mysql客户端连接第2个(或第n个)mysql实例:
/home/mysql-1/bin/mysql -uroot -p --port=3307 --socket=/home/mysql-1/socket/mysql.sock


三、解决问题
1. 配置好以后启动出错,查看错误日志文件
cat /home/mysql/data/主机名.err

有几行关于innodb的出错信息:
InnoDB: No valid checkpoint found.
InnoDB: If this error appears when you are creating an InnoDB database,
InnoDB: the problem may be that during an earlier attempt you managed
InnoDB: to create the InnoDB data files, but log file creation failed.
InnoDB: If that is the case, please refer to
InnoDB: http://dev.mysql.com/doc/refman/5.5/en/error-creating-innodb.html
140320 18:06:15 [ERROR] Plugin 'InnoDB' init function returned error.
140320 18:06:15 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
140320 18:06:15 [ERROR] Unknown/unsupported storage engine: InnoDB
140320 18:06:15 [ERROR] Aborting

解决方法如下(删除innodb相关文件):
cd /home/mysql
rm log/innodblog/*
rm data/ibdata1
(这个方法只适用于mysqld初始化以后不能启动的问题,对于已经建过库的mysql,可能不能用这个方法)

然后重启mysqld。



返回顶部
顶部