OPS tool Ansible Quick Start tutorial

Ansible Introduction

Ansible is a new automated operation tools, based on Python development, the collection of a number of operations tools (puppet, Cfengine, Chef, func, fabric) The advantages of the implementation of batch system configuration, batch program deployment, batch Run command and other functions.

Ansible is a module-based operation and does not have the capacity to deploy in bulk. The real batch deployment is the module that Ansible runs, and Ansible just provides a framework. Mainly include: (1) connection plug-in connection plugins: responsible for and be monitored to achieve communication; (2) Host inventory: The host that specifies the operation, is the host that defines the monitoring in a configuration file, (3) Various module core module, command module, Custom modules, (4) The use of plug-ins to complete logging mail and other functions; (5) Playbook: When a script performs multiple tasks, it is not necessary to allow the node to run multiple tasks at once. Experimental Environment

Virtual Machine x2, operating system: Tinycorelinux, created by Docker-machine. Installing Ansible

Tinycorelinux mirroring use help-accelerating software Installation

1. Install Python, python-setuptools

Tce-load-wi python Python-setuptools

2. Install Pip

sudo easy_install-i http://mirrors.aliyun.com/pypi/simple/pip

3, Installation Ansible

sudo pip install-i http://mirrors.aliyun.com/pypi/simple/--trusted-host mirrors.aliyun.com ansible

4. Verification Ansible

Ansible--version

using SSH to manage other hosts

1. Generate secret key Id_rsa and Id_rsa.pub

$ cd ~/.ssh/

$ ssh-keygen-t RSA

2. Add public key id_rsa.pub content to the ~/.ssh/authorized_keys file of other hosts

3. Add hosts in the/etc/ansible/hosts file that need to be managed

$ sudo vi/etc/ansible/hosts

[swarm]
192.168.99.103  ansible_connection=ssh  ansible_ssh_user= Docker

4. Test: Manage other hosts create Hello folder

Ansible all-a "mkdir Hello"

Prerequisites: Other hosts need to install Python, otherwise the following error will be reported

docker@managerx:/etc/ansible$ ansible all-a "/bin/echo hello"
192.168.99.101 | failed! = = {
   "changed": false,
   "Module_stderr": "Shared connection to 192.168.99.101 closed.\r\n",
   "Module_ StdOut ":"/bin/sh:/usr/bin/python:not found\r\n ",
   " msg ":" MODULE FAILURE ",
   " RC ": 0
}

Tinycorelinux installed Python execution commands under the/usr/local/bin/python path, so to soft connect to/usr/bin/python, the command is as follows:

sudo ln-s/usr/local/bin/python/usr/bin/python

There is also a way to specify the Python path, edit the/etc/ansible/hosts

[Swarm]
192.168.99.103  ansible_connection=ssh  ansible_ssh_user=docker ansible_python_interpreter=/usr/local/bin /python