<p>CREATE REPLICATION MYSQL</p>

mysqld --defaults-file=/etc/my.cnf --initialize --user=mysql

In 8.4 Community, the host cache is managed internally.
FLUSH HOST DEPRICATED --> SELECT * FROM performance_schema.host_cache;

CREATE USER 'repl'@'%' IDENTIFIED BY 'password';
GRANT REPLICATION SLAVE ON *.* TO 'repl'@'%';
FLUSH PRIVILEGES;

CHANGE REPLICATION SOURCE TO
SOURCE_HOST='192.168.241.101',
SOURCE_USER='repl',
SOURCE_PASSWORD='password',
SOURCE_PORT=3360,
SOURCE_AUTO_POSITION=1,
SOURCE_SSL=1,
SOURCE_SSL_CA='/data/ca.pem';

slave my.cnf

[mysqld]
datadir=/data/mysql_server
socket=/var/lib/mysql/mysql.sock
log-error=/data/mysql_server/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

server-id=2
log_bin=mysql-bin
binlog_format=ROW
gtid_mode=ON
enforce_gtid_consistency=ON
get_source_public_key=1

port=3360
user=mysql
symbolic-links=0

# Connection limits (safe for low-memory VM)
max_connections=50
max_user_connections=50

# Packet and temporary table sizes
max_allowed_packet=16M
tmp_table_size=32M
max_heap_table_size=32M

# Sorting and read buffers (per connection, smaller for low RAM)
sort_buffer_size=2M
read_buffer_size=2M
read_rnd_buffer_size=4M
join_buffer_size=2M

# Storage engine
default-storage-engine=InnoDB
key_buffer_size=8M
bulk_insert_buffer_size=8M

# InnoDB settings for small memory
innodb_log_file_size=32M
innodb_print_all_deadlocks=1
innodb_buffer_pool_instances=1
innodb_buffer_pool_size=512M
innodb_read_io_threads=4
innodb_write_io_threads=4
innodb_thread_concurrency=0
innodb_io_capacity=100
innodb_log_buffer_size=8M
innodb_flush_log_at_trx_commit=2
innodb_lock_wait_timeout=50

# Transaction isolation
transaction-isolation=READ-COMMITTED

[root@node2 data]#

============================

master my.cnf