へんすう

変数の定義と参照

template:
  src: foo.cfg.j2
  dest: '{{ remote_install_path }}/foo.cfg'
  name: '{{ abc }}'
  dest: '{{ abc }}/abc.com'
  dest: '{{ abc }}'/abc.com #문법 오류

- hosts: 192.168.100.11
  vars:
    msg: hello world
    
  tasks:
    - debug:
        var: msg
    - debug:
        msg: '{{ msg }} korea'

- hosts: 192.168.100.11
  vars:
    msg: hello world
    web:
      message: hello web
    fruits:
      - apple
      - banana

  tasks:
    - debug:
        msg: '{{ msg }} korea'
    - debug:
        msg: "{{ web['message'] }}"
        #msg: '{{ web["message"] }}' O
        #msg: '{{ web['message'] }}' X
    - debug:
        msg: '{{ fruits[0] }} {{ fruits[1] }}'

変数の登録

- hosts: 192.168.100.11

  tasks:
    - yum:
        name: httpd
        state: installed
      register: yum_result #등록 변수

    - debug:
        var: yum_result
    - debug:
        var: yum_result["rc"]

変数定義の場所

Playbookで変数を定義する

vars

- hosts: a
  vars:
    message: hello

vars_prompt

---
- hosts: 192.168.100.11
  vars_prompt:
    - name: username
      prompt: What is your username?
      private: no

    - name: password
      prompt: What is your password?

  tasks:
    - debug:
        msg: 'Logging in as {{ username }}, password is {{ password }}'

vars_files

- hosts: a
  vars_files:
    - vars.yaml

  tasks:
    - debug:
        var: msg

msg: hello world

在庫での変数の定義

[nodes]
192.168.100.11 msg=seoul
192.168.100.12 msg=busan

[nodes:vars]
message="hello world"

- hosts: nodes
  tasks:
    - debug:
        var: msg
    - debug:
        var: message     

コマンドで変数を定義する

ansible-playbook test.yaml -e msg=korea

変数の優先度

変数の範囲

フィルタ

{{ msg | filter }}

- hosts: 192.168.100.11
  vars:
    pwd: P@ssw0rd
  tasks:
    - user:
        name: devops
        password: "{{ pwd | password_hash('sha512', 65534 | random(seed=inventory_hostname) | string) }}"
        state: present

パラメータ

- hosts: 192.168.100.11
  gather_facts: no

とくしゅへんすう

かたわく

- hosts: 192.168.100.11
  vars:
    message: korea
  tasks:
    - copy:
        src: origin.txt
        dest: /tmp/copy.txt
    - template:
        src: origin.txt
        dest: /tmp/template.txt

hello {{ message }} world

Ubuntu構成

Vagrant.configure("2") do |config|
	# Define VM
	config.vm.define "controller" do |centos|
		centos.vm.box = "centos/7"
		centos.vm.hostname = "controller"
		centos.vm.network "private_network", ip: "192.168.100.10"
		centos.vm.provider "virtualbox" do |vb|
			vb.name = "controller"
			vb.cpus = 2
			vb.memory = 2048
		end
	end
	# Define VM
	config.vm.define "node1" do |centos|
		centos.vm.box = "centos/7"
		centos.vm.hostname = "node1"
		centos.vm.network "private_network", ip: "192.168.100.11"
		centos.vm.provider "virtualbox" do |vb|
			vb.name = "node1"
			vb.cpus = 2
			vb.memory = 2048
		end
	end
	# Define VM
	config.vm.define "node2" do |centos|
		centos.vm.box = "centos/7"
		centos.vm.hostname = "node2"
		centos.vm.network "private_network", ip: "192.168.100.12"
		centos.vm.provider "virtualbox" do |vb|
			vb.name = "node2"
			vb.cpus = 2
			vb.memory = 2048
		end
	end
	# Define VM
	config.vm.define "node3" do |ubuntu|
		ubuntu.vm.box = "ubuntu/bionic64"
		ubuntu.vm.hostname = "node3"
		ubuntu.vm.network "private_network", ip: "192.168.100.13"
		ubuntu.vm.provider "virtualbox" do |vb|
			vb.name = "node3"
			vb.cpus = 2
			vb.memory = 2048
		end
	end
end

aptコマンドオプション

ネットワーク管理

netplan apply

その他