[root@izwz9gxsbwybwg9n5xdi47z opt]# tar -zxvf mysql-5.7.18-linux-glibc2.5-x86_64.tar.gz
[root@izwz9gxsbwybwg9n5xdi47z opt]# mv mysql-5.7.18-linux-glibc2.5-x86_64 mysql5718
[root@izwz9gxsbwybwg9n5xdi47z opt]# cd mysql5718
[root@izwz9gxsbwybwg9n5xdi47z mysql5718]# mkdir db1
[root@izwz9gxsbwybwg9n5xdi47z mysql5718]# mkdir db2
[root@izwz9gxsbwybwg9n5xdi47z mysql5718]# cd db1
[root@izwz9gxsbwybwg9n5xdi47z db1]# mkdir data
[root@izwz9gxsbwybwg9n5xdi47z db1]# mkdir conf
[root@izwz9gxsbwybwg9n5xdi47z db1]# mkdir redolog
[root@izwz9gxsbwybwg9n5xdi47z db1]# mkdir -p mysqllog/relaylog
[root@izwz9gxsbwybwg9n5xdi47z db1]# mkdir -p mysqllog/logfile
[root@izwz9gxsbwybwg9n5xdi47z db1]# mkdir -p mysqllog/binlog
[root@izwz9gxsbwybwg9n5xdi47z mysql5718]# cd db2
[root@izwz9gxsbwybwg9n5xdi47z db2]# mkdir data
[root@izwz9gxsbwybwg9n5xdi47z db2]# mkdir conf
[root@izwz9gxsbwybwg9n5xdi47z db2]# mkdir redolog
[root@izwz9gxsbwybwg9n5xdi47z db2]# mkdir -p mysqllog/relaylog
[root@izwz9gxsbwybwg9n5xdi47z db2]# mkdir -p mysqllog/logfile
[root@izwz9gxsbwybwg9n5xdi47z db2]# mkdir -p mysqllog/binlog
2.db1的参数文件
[root@izwz9gxsbwybwg9n5xdi47z conf]# more my.cnf
[mysqld]
port=3306
server-id=1
datadir=/opt/mysql5718/db1/data
character-set-server=utf8
max_connections = 1500
skip-external-locking
key_buffer_size=16M
max_allowed_packet=16M
myisam_sort_buffer_size=16M
query_cache_size=32M
read_buffer_size=2M
sort_buffer_size=2M
#table_cache=512
#thread_cache=20
#thread_concurrency=4
interactive_timeout=86400
wait_timeout=86400
#log_slow_queries=1
innodb_file_per_table=1
#innodb_additional_mem_pool_size=16M
innodb_buffer_pool_size=16M
innodb_flush_log_at_trx_commit=0
innodb_lock_wait_timeout=50
innodb_log_buffer_size=128M
innodb_log_file_size=128M
innodb_log_files_in_group=5
innodb_log_group_home_dir=/opt/mysql5718/db1/redolog
innodb_thread_concurrency=8
log_bin_trust_function_creators=1
event_scheduler=1
max_binlog_size=100M
log-bin=/opt/mysql5718/db1/mysqllog/binlog/binlog.bin
slow_query_log_file=/opt/mysql5718/db1/mysqllog/logfile/slow-query.log
long_query_time=1
log-error=/opt/mysql5718/db1/mysqllog/logfile/mysql-err.log
binlog_format=mixed
expire_logs_days=7
binlog_cache_size=4MB
skip-host-cache
#skip-name-resolve
#read-only
skip-slave-start
relay-log-index=/opt/mysql5718/db1/mysqllog/relaylog/slave-relay-bin.index
relay-log=/opt/mysql5718/db1/mysqllog/relaylog
replicate-ignore-db=information_schema,performance_schema
slave_net_timeout=60
log_slave_updates=1
##lower_case_table_names=1
language=/opt/mysql5718/share/english
early-plugin-load=""
explicit_defaults_for_timestamp=true
[client]
port = 3306
socket=/opt/mysql5718/db1/mysql.sock
default-character-set = utf8
[mysqldump]
quick
max_allowed_packet = 16M
[myisamchk]
key_buffer_size = 8M
sort_buffer_size = 8M
read_buffer = 4M
write_buffer = 4M
3.db2的参数文件
[root@izwz9gxsbwybwg9n5xdi47z conf]# more my.cnf
[mysqld]
port=3307
server-id=1
datadir=/opt/mysql5718/db2/data
socket=/opt/mysql5718/db2/mysql.sock
character-set-server=utf8
max_connections = 100
skip-external-locking
key_buffer_size=8M
max_allowed_packet=8M
myisam_sort_buffer_size=8M
query_cache_size=16M
read_buffer_size=2M
sort_buffer_size=2M
#table_cache=512
#thread_cache=20
#thread_concurrency=4
interactive_timeout=86400
wait_timeout=86400
#log_slow_queries=1
innodb_file_per_table=1
#innodb_additional_mem_pool_size=16M
innodb_buffer_pool_size=8M
innodb_flush_log_at_trx_commit=0
innodb_lock_wait_timeout=50
innodb_log_buffer_size=32M
innodb_log_file_size=128M
innodb_log_files_in_group=5
innodb_log_group_home_dir=/opt/mysql5718/db2/redolog
innodb_thread_concurrency=8
log_bin_trust_function_creators=1
event_scheduler=1
max_binlog_size=100M
log-bin=/opt/mysql5718/db2/mysqllog/binlog/binlog.bin
slow_query_log_file=/opt/mysql5718/db2/mysqllog/logfile/slow-query.log
long_query_time=1
log-error=/opt/mysql5718/db2/mysqllog/logfile/mysql-err.log
binlog_format=mixed
expire_logs_days=7
binlog_cache_size=4MB
skip-host-cache
#skip-name-resolve
#read-only
skip-slave-start
relay-log-index=/opt/mysql5718/db2/mysqllog/relaylog/slave-relay-bin.index
relay-log=/opt/mysql5718/db2/mysqllog/relaylog
replicate-ignore-db=information_schema,performance_schema
slave_net_timeout=60
log_slave_updates=1
##lower_case_table_names=1
language=/opt/mysql5718/share/english
early-plugin-load=""
explicit_defaults_for_timestamp=true
[client]
port = 3306
default-character-set = utf8
[mysqldump]
quick
max_allowed_packet = 16M
[myisamchk]
key_buffer_size = 8M
sort_buffer_size = 8M
read_buffer = 4M
write_buffer = 4M
4.修改文件权限
[root@izwz9gxsbwybwg9n5xdi47z opt]# chown -R mysql:mysql ./mysql5718
5.创建软连接
[root@host01 db]# mkdir -p /usr/local/mysql/bin
[root@host01 db]# ln -s /opt/mysql5718/bin/mysqld /usr/local/mysql/bin/mysqld
6.安装db1
./mysqld --initialize --user=mysql --basedir=/opt/mysql5718 --datadir=/opt/mysql5718/db1/data --lc_messages_dir=/opt/mysql5718/share --lc_messages=en_US
7.安装db2
./mysqld --initialize --user=mysql --basedir=/opt/mysql5718 --datadir=/opt/mysql5718/db2/data --lc_messages_dir=/opt/mysql5718/share --lc_messages=en_US
8.db1、db2安装ssl_rsa
[mysql@host01 bin]$ ./mysql_ssl_rsa_setup --user=mysql --basedir=/db/mysqlmha --datadir=/opt/mysql5718/db1/data
[mysql@host01 bin]$ ./mysql_ssl_rsa_setup --user=mysql --basedir=/db/mysqlmha --datadir=/opt/mysql5718/db2/data
9.启动db1和db2
(在mysql用户下执行)
启动db1
[mysql@host01 bin]$ ./mysqld_safe --defaults-file=/opt/mysql5718/db1/conf/my.cnf --user=mysql
启动db2
[mysql@host01 bin]$ ./mysqld_safe --defaults-file=/opt/mysql5718/db2/conf/my.cnf --user=mysql
启动db2的时候报如下错误，因为我机器内存比较小，无法分配内存导致的，调整db2的my.cnf参数再次启动。
2017-06-01T06:15:00.128396Z 0 [ERROR] InnoDB: Cannot allocate 268435992 bytes of memory after 60 retries over 60 seconds. OS error:
Cannot allocate memory (12). Check if you should increase the swap file or ulimits of your operating system. Note that on most 32-bi
t computers the process memory space is limited to 2 GB or 4 GB.
key_buffer_size=16777216
read_buffer_size=2097152
max_used_connections=0
max_threads=1500
thread_count=0
connection_count=0
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 6180399 K bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
再次启动报如下错误：
2017-06-01T06:36:27.010905Z 0 [ERROR] Another process with pid 30006 is using unix socket file.
2017-06-01T06:36:27.010920Z 0 [ERROR] Unable to setup unix socket lock file.
2017-06-01T06:36:27.010932Z 0 [ERROR] Aborting
原因是db1和db2公用一个socket,默认是/tmp/mysql.sock,修改db2的参数文件在mysqld下指定另外一个socket,如下:
[mysqld]
port=3307
server-id=1
datadir=/opt/mysql5718/db2/data
socket=/opt/mysql5718/db2/mysql.sock
再次启动db2,成功启动，这样就完成了一个mysql同时部署多个实例.