ansible playbook written - split a file into multiple roles yml

See this blog experimental environment using ansible deployment and the basic module of
the playbooks of the need to write yml document is divided into multiple roles, easy management.

[devops@server1 ansible]$ mkdir roles
[devops@server1 ansible]$ ansible-galaxy list 	##查看角色列表
[devops@server1 ansible]$ cd roles/
[devops@server1 roles]$ ansible-galaxy init httpd		##创建角色
- httpd was created successfully

We can see the files and directories within the directory generated.

Character	effect
files	Used to store the file copy module called by the script or module.
templates	Jinjia2 used to store template, template module will automatically find jinjia2 template files in this directory.
tasks	This directory should contain a main.yml file, define the task list for this role, this document can be used include contain other task files located in this directory.
handlers	This directory should contain a main.yml file that defines the action to perform this role when the trigger condition.
whose	This directory should contain a main.yml file that defines the variables used in this role.
defaults	This directory should contain a main.yml file, used to set the default variable to the current role.
meta	This directory should contain a main.yml file that defines the special setting of this role and its dependencies.

We found a playbook of these roles will in fact have been a long yml separate file to a different directory httpd nothing like the code deployment services used earlier:

---
- hosts: webservers						##声明作用的主机
  vars:									##角色1
    http_port: 8080
  tasks:								##角色2			
    - name: install httpd
      yum:
        name: httpd
        state: latest

    - name: create index.html
      copy:
        content: "{{ ansible_facts['hostname'] }}\n"
        dest: /var/www/html/index.html
      tags: index

    - name: configure httpd
      template:
        src: templates/httpd.conf
        dest: /etc/httpd/conf/httpd.conf
        owner: root
        group: root
        mode: 644
      notify: restart httpd

    - name: start httpd
      service:
        name: httpd
        state: started
        enabled: true

    - name: start firewalld
      service:
        name: firewalld
        state: started
        enabled: true
    - name: configure firewalld
      firewalld:
        service: http
        state: enabled
        permanent: yes
        immediate: yes


  handlers:								##角色3
    - name: restart httpd
      service:
        name: httpd
        state: restarted

We found that the above code marked roles vars, tasks, handler in the directory generated above all our correspondence below the above code is split into a role, a closer look at how to write a character playbook file.
First, let's write vars role

[devops@server1 httpd]$ ls
defaults  files  handlers  meta  README.md  tasks  templates  vars
[devops@server1 httpd]$ vim vars/main.yml 

Var content on and above the content of the module as
the same, write task roles

[devops@server1 httpd]$ ls
defaults  files  handlers  meta  README.md  tasks  templates  vars
[devops@server1 httpd]$ vim tasks/main.yml 

---
- name: install httpd
  yum:
    name: httpd
    state: latest

- name: create index.html
  copy:
    content: "{{ ansible_facts['hostname'] }}\n"
    dest: /var/www/html/index.html
  tags: index

- name: configure httpd
  template:
    src: templates/httpd.conf
    dest: /etc/httpd/conf/httpd.conf
    owner: root
    group: root
    mode: 644
  notify: restart httpd

- name: start httpd
  service:
    name: httpd
    state: started
    enabled: true

- name: start firewalld
  service:
    name: firewalld
    state: started
    enabled: true

- name: configure firewalld
  firewalld:
    service: http
    state: enabled
    permanent: yes
    immediate: yes

Contents and task module as above.
Next, write handlers role

[devops@server1 httpd]$ ls
defaults  files  handlers  meta  README.md  tasks  templates  vars
[devops@server1 httpd]$ vim handlers/main.yml 

Finally, templates role

[devops@server1 httpd]$ cd templates/
[devops@server1 templates]$ ls
httpd.conf
[devops@server1 templates]$ vim httpd.conf

This directory put the main configuration file httpd service, the port is set vars role {{http_port}}, easily modified later to do the port test.
This put a yml file into multiple roles, but you will find that the host has not been defined.

[devops@server1 ansible]$ vim apache.yml 

---
- hosts: all			##定义主机
  roles:
    - httpd				##定义角色

We want to make this whole big role httpd run up, to be written in a general yml file ansible main configuration file, define the operation of the host, after pushing the yml file on it.

[devops@server1 ansible]$ ansible-playbook apache.yml 

Push the success in testing to see if httpd roles we create can achieve the corresponding functions

[devops@server1 ansible]$ vim roles/httpd/vars/main.yml 

Write vars role, to see whether the port can be modified.

[devops@server1 ansible]$ ansible-playbook apache.yml 

Push.

View the remote host port, successfully modified, so the file is divided into multiple roles yml a success.