Ansible : Playbook を利用する (変数)2024/07/31 |
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Ansible Playbook では変数も利用できます。 |
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| [1] | 変数の利用例です。[packages] に値を格納し、{{ packages }} で参照しています。 |
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ubuntu@dlp:~$
vi playbook_sample.yml
- hosts: target_servers
become: yes
become_method: sudo
tasks:
- name: General packages are installed
apt:
name: "{{ packages }}"
state: present
vars:
packages:
- tar
- wget
- unzip
tags: General_Packages
ansible-playbook playbook_sample.yml --ask-become-pass BECOME password: PLAY [target_servers] ********************************************************** TASK [Gathering Facts] ********************************************************* ok: [10.0.0.51] ok: [10.0.0.52] TASK [General packages are installed] ****************************************** changed: [10.0.0.52] changed: [10.0.0.51] PLAY RECAP ********************************************************************* 10.0.0.51 : ok=2 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0 10.0.0.52 : ok=2 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0 # 確認 ubuntu@dlp:~$ ansible target_servers -m shell -a "which tar; which wget; which unzip;" 10.0.0.52 | CHANGED | rc=0 >> /usr/bin/tar /usr/bin/wget /usr/bin/unzip 10.0.0.51 | CHANGED | rc=0 >> /usr/bin/tar /usr/bin/wget /usr/bin/unzip |
| [2] | Playbook を実行すると、最初に [GATHERING FACTS] タスクが必ず実行されます。 これは対象ホストの情報を収集している処理で、ここで収集された情報は変数に格納されているため、参照して利用することができます。 なお、[GATHERING FACTS] で収集している情報と同じ情報は [setup] モジュールで確認できます。 |
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# GATHERING FACTS の情報は setup モジュールで確認可能 ubuntu@dlp:~$ ansible 10.0.0.50 -m setup
10.0.0.50 | SUCCESS => {
"ansible_facts": {
"ansible_all_ipv4_addresses": [
"10.0.0.50"
],
"ansible_all_ipv6_addresses": [
"fe80::5054:ff:fe25:f57e"
],
"ansible_apparmor": {
"status": "enabled"
},
"ansible_architecture": "x86_64",
"ansible_bios_date": "04/01/2014",
"ansible_bios_vendor": "SeaBIOS",
"ansible_bios_version": "1.16.3-2.el9",
"ansible_board_asset_tag": "NA",
.....
.....
# [ansible_distribution], [ansible_distribution_version] を参照
- hosts: target_servers
tasks:
- name: Refer to Gathering Facts
command: echo "{{ ansible_distribution }} {{ ansible_distribution_version }}"
register: dist
- debug: msg="{{ dist.stdout }}"
ansible-playbook playbook_sample.yml
PLAY [target_servers] **********************************************************
TASK [Gathering Facts] *********************************************************
ok: [10.0.0.52]
ok: [10.0.0.51]
TASK [Refer to Gathering Facts] ************************************************
changed: [10.0.0.52]
changed: [10.0.0.51]
TASK [debug] *******************************************************************
ok: [10.0.0.51] => {
"msg": "Ubuntu 24.04"
}
ok: [10.0.0.52] => {
"msg": "Ubuntu 24.04"
}
PLAY RECAP *********************************************************************
10.0.0.51 : ok=3 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
10.0.0.52 : ok=3 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
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