ansbile简单应用

一、简介

Ansible is a radically simple configuration-management, application deployment, task-execution, and multinode orchestration engine.

Design Principles

Have a dead simple setup process and a minimal learning curve
Be super fast & parallel by default
Require no server or client daemons; use existing SSHd
Use a language that is both machine and human friendly
Focus on security and easy auditability/review/rewriting of content
Manage remote machines instantly, without bootstrapping
Allow module development in any dynamic language, not just Python
Be usable as non-root
Be the easiest IT automation system to use, ever.

二、安装

ansible依赖于Python 2.6或更高的版本、paramiko、PyYAML及Jinja2。

2.1 编译安装

解决依赖关系

# yum -y install python-jinja2 PyYAML python-paramiko python-babel python-crypto
# tar xf ansible-1.5.4.tar.gz
# cd ansible-1.5.4
# python setup.py build
# python setup.py install
# mkdir /etc/ansible
# cp -r examples/* /etc/ansible

2.2 rpm包安装
# yum install ansible

注意：不同版本的ansible的功能差异可能较大。

三、简单应用

ansible通过ssh实现配置管理、应用部署、任务执行等功能，因此，需要事先配置ansible端能基于密钥认证的方式联系各被管理节点。

ansible <host-pattern> [-f forks] [-m module_name] [-a args]
-m module：默认为command

ansible-doc: Show Ansible module documentation
-l, --list List available modules
-s, --snippet Show playbook snippet for specified module(s)

实例应用：

ssh-keygen -t rsa -P ''

ssh-copy-id -i .ssh/id_rsa.pub root@103.242.135.25

一、定义host