2、编写my.cnf模板
my.cnf模板如下：
[MySQLd_safe]
pid-file=/opt/mysql/run/mysqld.pid
[mysql]
prompt=\\u@\\d \\r:\\m:\\s>
default-character-set=gbk
no-auto-rehash
[client]
socket=/opt/mysql/run/mysql.sock
[mysqld]
#dir
basedir=/opt/mysql
datadir=/data/mysql/data
tmpdir=/data/mysql/tmp
log-error=/data/mysql/log/alert.log
slow_query_log_file=/data/mysql/log/slow.log
general_log_file=/data/mysql/log/general.log
socket=/opt/mysql/run/mysql.sock
#innodb
innodb_data_home_dir=/data/mysql/data
innodb_log_group_home_dir=/data/mysql/data
innodb_data_file_path=ibdata1:2G;ibdata2:16M:autoextend
innodb_buffer_pool_size=10G
innodb_buffer_pool_instances=4
innodb_log_files_in_group=4
innodb_log_file_size=1G
innodb_log_buffer_size=200M
innodb_flush_log_at_trx_commit=1
innodb_additional_mem_pool_size=20M
innodb_max_dirty_pages_pct=60
innodb_io_capacity=200
innodb_thread_concurrency=32
innodb_read_io_threads=8
innodb_write_io_threads=8
innodb_open_files=60000
innodb_file_format=Barracuda
innodb_file_per_table=1
innodb_flush_method=O_DIRECT
innodb_change_buffering=all
innodb_adaptive_flushing=1
innodb_old_blocks_time=1000
innodb_stats_on_metadata=0
innodb_read_ahead=0
innodb_use_native_aio=0
innodb_lock_wait_timeout=50
innodb_rollback_on_timeout=0
innodb_purge_threads=1
innodb_strict_mode=1
transaction-isolation=READ-COMMITTED
#myisam
key_buffer_size=100M
myisam_sort_buffer_size=64M
concurrent_insert=2
delayed_insert_timeout=300
#replication
master-info-file=/data/mysql/log/master.info
relay-log=/data/mysql/log/mysql-relay
relay_log_info_file=/data/mysql/log/mysql-relay.info
relay-log-index=/data/mysql/log/mysql-relay.index
slave_load_tmpdir=/data/mysql/tmp
slave_type_conversions="ALL_NON_LOSSY"
slave_net_timeout=4
skip-slave-start
sync_master_info=1000
sync_relay_log_info=1000
#binlog
log-bin=/data/mysql/log/mysql-bin
server_id=2552763370
binlog_cache_size=32K
max_binlog_cache_size=2G
max_binlog_size=500M
binlog_format=ROW
sync_binlog=1000
log-slave-updates=1
expire_logs_days=0
#server
default-storage-engine=INNODB
character-set-server=gbk
lower_case_table_names=1
skip-external-locking
open_files_limit=65536
safe-user-create
local-infile=1
performance_schema=0
log_slow_admin_statements=1
log_warnings=1
long_query_time=1
slow_query_log=1
general_log=0
query_cache_type=0
query_cache_limit=1M
query_cache_min_res_unit=1K
table_definition_cache=65536
thread_stack=512K
thread_cache_size=256
read_rnd_buffer_size=128K
sort_buffer_size=256K
join_buffer_size=128K
read_buffer_size=128K
port=3306
skip-name-resolve
skip-ssl
max_connections=4500
max_user_connections=4000
max_connect_errors=65536
max_allowed_packet=128M
connect_timeout=8
net_read_timeout=30
net_write_timeout=60
back_log=1024
#server id
细心的读者应该会注意在，在my.cnf的末尾在server id上留了空白，在后面的shell脚本会动态加上，这是因为在一个企业内部的所有MySQL的server id必须保持全局一致性，这样在主备复制时才不会导致混乱。
其实如果想把这个脚本写的更通用，完全可以把更多的参数留白，如port、datadir、内存相关参数等，这里我只是以server id为例，抛砖引玉。