How to use ansible_ssh_port in playbook task - ansible

Question

My Situation is my database server is not opened with default ssh port 22, so I am trying to execute a query over port 3838.Below is the code -
tasks:
- name: passive | Get MasterDB IP
mysql_replication: mode=getslave
register: slaveInfo
- name: Active | Get Variable Details
mysql_variables: variable=hostname ansible_ssh_port=3838
delegate_to: "{{ slaveInfo.Master_Host }}"
register: activeDbHostname
Ansible version is :- 1.7.2
TASK: [Active | Get Variable Details] *****************************************
<192.168.0.110> ESTABLISH CONNECTION FOR USER: root on PORT 22 TO 192.168.0.110
fatal: [example1.com -> 192.168.0.110] => {'msg': 'FAILED: [Errno 101] Network is unreachable', 'failed': True}
FATAL: all hosts have already failed -- aborting
It connecting over default port 22 rather connecting on 3838 port. Please share your thoughts, If I am going wrong somewhere ...

Answer 1

You can specify the value for ansible_ssh_port in a number of places. But you will likely want to use a dynamic inventory script.
eg. From hosts file:
[db-slave]
10.0.0.20 ansible_ssh_port=3838
eg. as a variable in host_vars:
---
# host_vars/10.0.0.20/default.yml
ansible_ssh_port: 3838
eg. in a dynamic inventory! you may use a combo of group_vars and tagging the instances:
---
# group_vars/db-slaves/default.yml
ansible_ssh_port: 3838
use gce.py, ec2.py or some other dynamic inventory script and group your intances in the hosts file:
[tag_db-slaves]
; this is automatically filled by ec2.py or gce.py
[db-slaves:children]
tag_db-slaves
Of course this will mean you need to tag the instances when you fire them up. You can find several dynamic inventory scripts in the ansible repository.
If your mysqld is running on a docker instance in the same host, I would recommend you create a custom dynamic inventory with some form of service discovery, such as using consul, etcd, zookeeper, or some custom solution using a key-value store such as redis. You can find an introduction to dynamic inventories in the ansible documentation.