Continuous Delivery with Docker and Jenkins

Variables

While the Ansible automation makes things identical and repeatable for multiple hosts, it is inevitable that servers may require some differences. For example, think of the application port number. It can be different depending on the machine. Luckily, Ansible provides variables, which is a good mechanism to deal with server differences. Let's create a new playbook and define a variable.

For example, think of the application port number. It can be different depending on the machine. Luckily, Ansible provides variables, which is a good mechanism to deal with server differences. Let's create a new playbook and define a variable.

---- hosts: web1  vars:    http_port: 8080

The configuration defines the http_port variable with the value ...