0. precondition

a) install mysql 5.7, for  detail please refer my blog post.

1. login mysql and check the variables to see if the binlog has  been enabled.

mysql -h 127.0.0.1 -uroot -prootshow variables like ‘%log_bin%‘;

we can see, the log_bin is disabled.

2. Turn on mysql log_bin

sudo vim /etc/mysql/conf.d/mysql.cnf 

add the following config segment at the end of the file

# ----------------------------------------------# Enable the binlog for replication & CDC# ----------------------------------------------# Enable binary replication log and set the prefix, expiration, and log format.# The prefix is arbitrary, expiration can be short for integration tests but would# be longer on a production system. Row-level info is required for ingest to work.# Server ID is required, but this will vary on production systemsserver-id = 223344log_bin = /var/lib/mysql/mysql-binexpire_logs_days = 3binlog_format = row
#Mysql Packet Size may need to be re-configured. MySQL may have, by default, a ridiculously low allowable packet size. 
#To increase it, you’ll need to have the property max_allowed_packet set to a higher number, say 1024M.max_allowed_packet=1024M

this configration means:

a) the server id is unique for each server, an is required for log_bin capture, it should be a numeric number equal or greater than 0, in my instance I set it to 223344, this number should be unique in the whole cluster.  seems it‘s a good idea to set it as the ip

address number of the machine install. I fact I have do this in my real production enviroment.

b) the path of the log_bin, this is required  to define the storage location fo the log_bin.

c) the log_bin retention time, in my case, I set it to 3 days.

d. the bin_log format, we should define it as row.

The whole definition file in my case is:

# For advice on how to change settings please see# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html[mysqld]## Remove leading # and set to the amount of RAM for the most important data# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.# innodb_buffer_pool_size = 128M## Remove leading # to turn on a very important data integrity option: logging# changes to the binary log between backups.# log_bin## Remove leading # to set options mainly useful for reporting servers.# The server defaults are faster for transactions and fast SELECTs.# Adjust sizes as needed, experiment to find the optimal values.# join_buffer_size = 128M# sort_buffer_size = 2M# read_rnd_buffer_size = 2Mskip-host-cacheskip-name-resolve#datadir=/var/lib/mysql#socket=/var/lib/mysql/mysql.sock#secure-file-priv=/var/lib/mysql-filesuser=mysql# Disabling symbolic-links is recommended to prevent assorted security riskssymbolic-links=0#log-error=/var/log/mysqld.log#pid-file=/var/run/mysqld/mysqld.pid# ----------------------------------------------# Enable the binlog for replication & CDC# ----------------------------------------------# Enable binary replication log and set the prefix, expiration, and log format.# The prefix is arbitrary, expiration can be short for integration tests but would# be longer on a production system. Row-level info is required for ingest to work.# Server ID is required, but this will vary on production systemsserver-id = 223344log_bin = /var/lib/mysql/mysql-binexpire_logs_days = 3binlog_format = row#Mysql Packet Size may need to be re-configured. MySQL may have, by default, a ridiculously low allowable packet size. #To increase it, you’ll need to have the property max_allowed_packet set to a higher number, say 1024M.max_allowed_packet=1024M

View Code

3. restart mysql service

systemctl restart mysql

after the mysql restarted, we use the command 

show variables like ‘%log_bin%‘;

and we should found the log_bin is turned on now:  log_bin                         | ON  

 then we go to file system, and can fould like this :

the log bin files are just there now!

-rw-r----- 1 mysql mysql 177 Apr 20 15:06 mysql-bin.000001
-rw-r----- 1 mysql mysql 154 Apr 20 15:22 mysql-bin.000002
-rw-r----- 1 mysql mysql 64 Apr 20 15:22 mysql-bin.index

Notes: every time we restart the mysql server instance, it will  call flush logs and then create a new binlog file.