Ansible playbook syntax and format automate cloud computing

YAML(yml) Language : (jinia2 Templates )

    1) playbook By yml Grammar writing , The structure is clear , High readability , So you have to master yml Basic grammar

    2) Indent : YAML Use a fixed indentation style to represent hierarchy , Each indentation consists of two spaces , Out of commission tabs

    3) The colon : Except those ending with a colon , All other colons must be followed by spaces

    4) Dash line : Represents a list item , Use a short bar with a space . Multiple items use the same indentation level as the same list

Modules with the same function Must be at the same level Strict alignment :

1) Script name

- name: The name or hint of the script Chinese or English  (ansible-play When the terminal prompts )

such as :

- name: install httpd and create vhost

- name: install http And configure the virtual host

2) Which hosts to operate on

    hosts: group1  ( Which hosts to operate on Host list /etc/ansible/inventory In the definition of [ The name defined in this square bracket ])

3) Which modules are called , What to do , One or more tasks tasks ( Installation configuration Configure the host Restart the service )

yum: install httpd

file: Delete file /etc/httpd/conf.d/welcome.conf

file: Create directory /data/web

copy: Generate home page content

template: Create a virtual host

service: Restart the service