【備忘録】Ansible② Playbookとインベントリの書き方 ref: https://qiita.com/Kento75/items/a5e89c5034200310f98f

file0.txt

$ sudo amazon-linux-extras install -y ansible2
$ ansible --version
ansible 2.x.x

file1.txt

[defaults]

# some basic default values...

↓ この行がコメントアウトされているので#を削除する
inventory      = /etc/ansible/hosts
#library        = /usr/share/my_modules/
#module_utils   = /usr/share/my_module_utils/
#remote_tmp     = ~/.ansible/tmp
#local_tmp      = ~/.ansible/tmp
#forks          = 5
#poll_interval  = 15
#sudo_user      = root
#ask_sudo_pass = True
#ask_pass      = True
#transport      = smart
#remote_port    = 22

file2.txt

[group1]
127.0.0.1 ansible_connection=local

[group2]
127.0.0.1 ansible_connection=local

[nodes]
node-1 ansible_host=127.0.0.1 ansible_connection=local
node-2 ansible_host=127.0.0.1 ansible_connection=local

file3.txt

vi ~/sample.yml

file4.txt

- hosts: group1  # ここでグループを指定
  vars:
    sample_args: "書き換えられる文字列"
  tasks:                        # tasks で定義された内容が実行される
    - debug:
        msg: "{{ sample_args }}"  # 変数を展開する場合 "{{}}" を使用する

file5.txt

$ ansible-playbook sample.yml -e 'sample_args=上書き後の文字 列'

PLAY [group1] ***************************************************************************

TASK [Gathering Facts] ******************************************************************
ok: [127.0.0.1]

TASK [debug] ****************************************************************************
ok: [127.0.0.1] => {
    "msg": "上書き後の文字列"
}

PLAY RECAP ******************************************************************************
127.0.0.1                  : ok=2    changed=0    unreachable=0    failed=0 

file6.txt

ansible-playbook sample.yml

PLAY [group1] ***************************************************************************

TASK [Gathering Facts] ******************************************************************
ok: [127.0.0.1]

TASK [debug] ****************************************************************************
ok: [127.0.0.1] => {
    "msg": "書き換えられる文字列"
}

PLAY RECAP ******************************************************************************
127.0.0.1                  : ok=2    changed=0    unreachable=0    failed=0