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Chapter 4 Use of ansible in large projects
New features in 1.3There are two features in Ansible 1.3 that were alluded to previously in the chapter.The first feature is the metadata roles. They allow you to specify that your roledepends on other roles. For example, if the application that you are deploying needsto send mail, your role could depend
Do not reprint advanced playbook without written permission
Finding files with variablesAll modules can take variables as part of their arguments by dereferencing themwith {{ and }} . You can use this to load a particular file based on a variable.For example, you might want to select a different config file for NRPE (a Nagioscheck daemon) based on the architecture in use. Here is how that would look:---#1- name: Configure NRPE for the right architecture#2hosts: ansibletest#3user: root#4tasks:#5
The answer is no longer installed on the window, the answer is as follows:It ' s back! Take the 2018 Developer Survey today?Join Stack Overflow to learn, share knowledge, and build your career.Email Sign UpOR Sign in withGoogle facebookhow to install ansible to my python at Windowsask Question
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When I tried to the install ansible to my Windows PC, the stuck with fol
No written authorization. Do not reprint Chapter 5 custom Module
Using a moduleNow that we have written our very first module for Ansible, we should give it ago in a playbook. Ansible looks at several places for its modules: first it looks at theplace specified in the library key in its config file ( /etc/ansible/ansible.cfg ),next it will look in the location s
Ansible learning-ansible
Ansible technologies (Automated O M tools) are developed based on python.
Installation methods include yum, apt, pip, etc.
For example, pip: pip install ansible
The only requirement of ansible for the client is to have SSH and Python (if the python
Do not reprint without written permission
Due to the long content in Chapter 3, I will divide it into several parts for translation.
Advanced PlaybooksSo far the playbooks that we have looked at are simple and just run a number ofmodules in order. Ansible allows much more control over the execution of yourplaybook. Using the following techniques, you should be able to perform eventhe most complex deployments.Running operations in parallelBy default,
Do not reprint without written permissionThe third chapter is long, because, I will be divided into several parts to translate.Advanced Playbooksso far the playbooks, we have looked at is simple and just run a number ofmodules in order. Ansible allows much more control over the execution of Yourplaybook. Using The following techniques, you should is able to perform eventhe most complex deployments. Running operations in Parallelby default,
Ansible is an automated operations tools, based on the development of Python, the collection of many 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 capability that does not have the ability to deploy in batches. The real batch deployment is the module that
If you do not have written authorization, do not repeat Chapter 4. Use of ansible in large projects
RolesIf your playbooks start expanding beyond what includes can help you solve, or youstart gathering a large number of templates, you may want to use roles. Roles inAnsible allow you to group files together in a defined format. They are essentiallyan extension to includes that handles a few things automatically, and this helps youorganize them insid
may eliminate your concerns.
Easy to use and quick to get started. I didn't spend much time researching Puppet before I used it. Think about it. Aren't we just trying to free ourselves from repetitive and complex tasks? Isn't it cost-effective to sink into another complicated thing to simplify one thing? In my experience, Ansible is very quick to get started. Ad-Hoc can be used to handle simple management tasks. You can also define the Playbook file
detects changes that may occur, but does not actually perform the operation–list-hosts List the hosts running the task–limit host list is only performed for hosts in the host list-V Show procedure-VV-VVV more details
ExampleAnsible-playbook file.yml--check Detection onlyAnsible-playbook file.ymlAnsible-playbook file.yml--limit Websrvs
Example 1, limited to a specific host execution, is not so the host executes[Email protected] app]# Ansible
If you do not have written authorization, do not repeat Chapter 4. Use of ansible in large projects
RolesIf your playbooks start expanding beyond what includes can help you solve, or youstart gathering a large number of templates, you may want to use roles. Roles inAnsible allow you to group files together in a defined format. They are essentiallyan extension to includes that handles a few things automatically, and this helps youorganize them inside
":" To define a series of successive hosts, which is OK to write below.[Test]192.168.38.[3:4][[email protected] ansible]# ansible-m ping ' test ' ping module testing, return Pong, on behalf of OK.192.168.38.3 | SUCCESS = {"Changed": false,"Ping": "Pong"}192.168.38.4 | SUCCESS = {"Changed": false,"Ping": "Pong"}[[email protected] ansible]#
, handlers}/main. ymltouch/etc/ansible/roles/PHP/{defaults, vars, tasks, Meta, handlers}/main. yml
2. compile the httpd module: write a simple tasks/main. yml: * VI/etc/ansible/roles/httpd/tasks/main. yml-Name: Ensure Apache is at the late ST version Yum: PKG ={{ PKG} state = latest definition variable: can be defined in global variables, it can also be defined
Ansible is based on modularity, with specific modules to complete specific tasksBased on the Python language implementation, implemented by three key modules of Paramiko, Pyyaml and JINJA2Simple deployment, agentless (no client deployment, client management via SSH protocol)Based on master-slave modeSupports custom modules (other programming language-written modules can also be called via Ansible interface)
Ansible module-lineinfile example, ansible-lineinfileLineinfile module details
The lineinfile module is similar to the sed tool in linux, but the articles on the Internet generally only have simple instances, and there are no examples of complicated points.
The following is a common example of the lineinfile Module I have summarized based on my actual operations.
Directory
More powerful than Ansible automated O M tools, automated and unified installation and deployment _ automated deployment of unifyDeploy1.0, ansible
New features:
Septem
In addition to pass (backup and update) and start (start Service), all automation is achieved.
Note: pass and start are set as service classes. Because of different services, automation cannot be achieved. Except for similar businesses, suc
-copy-id-i/root/.ssh//id_rsa.pub [email protected]2.3 Defining host and Group rulesAnsible the matching target host is remotely operated by a defined host and group rule (Inventory), the configuration rule file is/etc/ansible/hosts by default, as illustrated below:www.abc.com# define domain name 192.168.1.100# definition ip192.168.1.150:37268# Specify the port number [webserver] # Define grouping 192.168.1
February 23, 2016, learn, analyze Ansible code Ansible is a tool for bulk deployment used in operations, which is itself a framework, specific deployment and architectural analysis, and the following article is good. Http://os.51cto.com/art/201409/451927_all.htm First analyze the main file ansible, and the code and comments are as follows: 1. from __future__ Imp
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