I'm configuring this across two different servers on two different hosting companies.
Here is the tutorial I've followed for setting this up: https://www.digitalocean.com/community/tutorials/how-to-set-up-master-slave-replication-in-mysql
The master my.cnf settings are as follows:
bind-address = 00.000.000.00 server-id = 1 log_bin = /var/log/mysql/mysql-bin.log binlog_do_db = mydatabase
On the slave:
server-id = 2 relay-log = /var/log/mysql/mysql-relay-bin.log expire_logs_days = 10 max_binlog_size = 100M binlog_do_db = mydatabase
Everything looks good until I try and check
mysql> SHOW SLAVE STATUS\G
*************************** 1. row *************************** Slave_IO_State: Connecting to master Master_Host: 000.000.000.00 Master_User: slave_user Master_Port: 3306 Connect_Retry: 60 Master_Log_File: Read_Master_Log_Pos: 4 Relay_Log_File: mysql-relay-bin.000001 Relay_Log_Pos: 4 Relay_Master_Log_File: Slave_IO_Running: Connecting Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 0 Relay_Log_Space: 154 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 2003 Last_IO_Error: error connecting to master 'email@example.com' - retry-time: 60 retries: 3 Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 0 Master_UUID: Master_Info_File: /var/lib/mysql/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: 180104 23:22:36 Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: Auto_Position: 0 Replicate_Rewrite_DB: Channel_Name: Master_TLS_Version:
I've checked the error log as well and can see this:
2018-01-04T23:05:10.948738Z 2 [ERROR] Slave I/O for channel '': error connecting to master 'firstname.lastname@example.org:3306' - retry-time: 60 retries: 6, Error_code: 2003
I've checked the firewall and the port, which looks correct. I'm not sure what else I can check?