ansible使用6-Conditionals
when
tasks:
- name: "shutdown Debian flavored systems"
command: /sbin/shutdown -t now
when: ansible_os_family == "Debian"
tasks:
- command: /bin/false
register: result
ignore_errors: True
- command: /bin/something
when: result|failed
- command: /bin/something_else
when: result|success
- command: /bin/still/something_else
when: result|skipped
# fact
ansible hostname.example.com -m setup
tasks:
- shell: echo "only on Red Hat 6, derivatives, and later"
when: ansible_os_family == "RedHat" and ansible_lsb.major_release|int >= 6
# 变量
vars:
epic: true
tasks:
- shell: echo "This certainly is epic!"
when: epic
tasks:
- shell: echo "This certainly isn't epic!"
when: not epic
# jinja2模板
tasks:
- shell: echo "I've got '{{ foo }}' and am not afraid to use it!"
when: foo is defined
- fail: msg="Bailing out. this play requires 'bar'"
when: bar is not defined
# loop
tasks:
- command: echo {{ item }}
with_items: [ 0, 2, 4, 6, 8, 10 ]
when: item > 5
Loading in Custom Facts
tasks:
- name: gather site specific fact data
action: site_facts
- command: /usr/bin/thingy
when: my_custom_fact_just_retrieved_from_the_remote_system == '1234'
Applying ‘when’ to roles and includes
- include: tasks/sometasks.yml
when: "'reticulating splines' in output"
- hosts: webservers
roles:
- { role: debian_stock_config, when: ansible_os_family == 'Debian' }
Conditional Imports
---
- hosts: all
remote_user: root
vars_files:
- "vars/common.yml"
- [ "vars/{{ ansible_os_family }}.yml", "vars/os_defaults.yml" ]
tasks:
- name: make sure apache is running
service: name={{ apache }} state=running
---
# for vars/CentOS.yml
apache: httpd
somethingelse: 42
# for facter
ansible -m yum -a "pkg=facter ensure=installed"
ansible -m yum -a "pkg=ruby-json ensure=installed"
# for ohai
ansible -m yum -a "pkg=ohai ensure=installed"
Selecting Files And Templates Based On Variables
- name: template a file
template: src={{ item }} dest=/etc/myapp/foo.conf
with_first_found:
- files:
- {{ ansible_distribution }}.conf
- default.conf
paths:
- search_location_one/somedir/
- /opt/other_location/somedir/
Register Variables
- name: test play
hosts: all
tasks:
- shell: cat /etc/motd
register: motd_contents
- shell: echo "motd contains the word hi"
when: motd_contents.stdout.find('hi') != -1
- name: registered variable usage as a with_items list
hosts: all
tasks:
- name: retrieve the list of home directories
command: ls /home
register: home_dirs
- name: add home dirs to the backup spooler
file: path=/mnt/bkspool/{{ item }} src=/home/{{ item }} state=link
with_items: home_dirs.stdout_lines
# same as with_items: home_dirs.stdout.split()
posted on
2015-01-04 15:06
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转载于:https://www.cnblogs.com/liujitao79/p/4201196.html
