There are a lot of builtin filters which can be used in the Ansible playbook. Playbook keywords can control the connection plugin, whether to use privilege escalation, how to handle errors, and more. When composing lists, use a space between the dash (. This is the user account for the SSH connection. In a single playbook, you can see multiple modules and handlers are organized. We will just go to get you familiar with advanced playbooks and playbook structures. Hello World. An example from the official docs will help us to illustrate: 1. hosts: this is a list of machines (as per /etc/ansible/hosts) where the following tasks will be performed. I hope this article gave you some solid base on what is Ansible playbook and I know you might still have questions. The above is a sample Playbook where we are trying to cover the basic syntax of a playbook. Important: This playbook is provided as an example only to illustrate how Greenplum Database cluster configuration and software installation tasks can be automated using provisioning tools such as Ansible, Chef, or Puppet. This sample playbook shows how to use the OCI Ansible collection to delete objects created within a specified range of days from all buckets in a namespace. An Ansible playbook is a human-created description of the desired state of one or more computers. Install a .deb Package Using the apt Module. Ansible is a universal language, unraveling the mystery of how work gets done. Signup for Exclusive "Subscriber-only" Content, In this post, we are going to see how to run the playbook locally on our Localhost on the control machine. Creating your first Ansible playbook. If you like this article. An Ansible playbook consists of plays. If you do not want it to be upgraded if present, You can change it to state: present. There are many optional arguments can be passed to the ansible-playbook command, let’s discuss some essential options: – 1. Understanding the Ansible Playbooks Terminology. The following example will update the package cache, check whether the unzip package is installed or not on the Target server. Inside each Playbook you will find one or more group of hosts (each one of these groups is also called a play) where the desired tasks are to be performed. ansible roles explained with examples, playbook roles, ansible roles vs ansible playbooks, creating ansible roles, how does ansible roles works, ansible roles tutorial, ansible roles directory structure, ansible role examples Stay connected with us on social networking sites, Thank you. Ansible Delegate_to module helps us to execute a specific task in our playbook to run in other host or machine. Control Node: The machine where Ansible is installed. Welcome to the first "real" post of the Ansible for Dummies series - in this episode, we're going to look into the most important thing about Ansible - playbooks. I have written various Ansible playbooks and I have listed most of them here for your easy access. These playbooks relay instructions to remote servers and allow them to execute predefined tasks. Example: ansible-playbook nginx.yml –list-hosts Before we can move to a more hands-on view of Ansible, it is important that we get acquainted with important terminology and concepts introduced by this tool. to keep things cleaner and to keep your playbook simple, It is recommended to use separate variable files and when you are creating ansible roles, you would have to use the variable files more than defining it inline. By this playbook we will create a file demo.txt in /tmp directory on our all machine which belongs to web group then we will copy it into /mnt directory with example.txt name. This playbook contains the following elements:---: Signals the start of the playbook.name: Defines the name for the Ansible playbook. Ansible playbook supports defining the variable in two forms, Either as a separate file with full of variables and values like a properties file. Detailed comments help make the playbook even more clear and easy to understand. By. In this article, we explore all that Ansible playbooks are, how to write an Ansible playbook, its usage, playbook variables, and the Ansible playbook example. A playbook begins with three n-dashes (---), which is followed by the playbook name, the name of the remote hosts group that executes the playbook, and additional parameters such as become (execute the playbook as the admin). Automate. Variables with dictionaries combine multiple arrays of values into a single variable: Finally, special variables are predefined by Ansible and can’t be set by users. The second part, infoscale_ansible contains playbooks showing how I installed InfoScale and configured a Clustered File System. After the install and file tasks are completed the service will be started. this is only when you have a customized inventory file like I do. Ansible delegate_to Example and explanation. As a system administrator, you will need to perform a lot of tasks on a regular basis. Follow us on Facebook or Twitter While running a Playbook you might have had a requirement where you need to get the IP address of the connected and current remote host. Example Playbook. Listing 1: This Ansible playbook example shows the role that indentation has in organizing a YAML file. Using variables with arrays, assign multiple values to one variable with the following syntax: Access a specific value by using {{ array_name[value number] }}, for instance: Important: Array values are numbered starting with zero, so always choose one number lower than the one you want to access. So each week it makes a new log, backups last week log and on the third week it deletes the first one and repeats. Before writing a Playbook It is recommended that you have given a glance on the Ansible AD HOC Command how it works and how to execute them. Example: Repository A: contains playbooks to build/compile/deploy web applications. It will read the IP addres from the IP_VAR variable and use NMAP to scan this host. these articles would have a lot of playbook examples specific to modules and to a single topic. This is a perfect example of why we should include comments in our code and playbooks because they explain why this particular play is needed and why it is different from the others. This is dedicated for ansible playbooks, Let us see how to execute the preceding playbook and install apache on the webservers host group. The playbook contains one play with two tasks, and should generate output like this: It starts with the vars tag in the same indentation level as the previous section, followed by a list of variables in the next indentation. This is an example playbook I use for cloning and deploying VMware Virtual Machines. Inside each Playbook you will find one or more group of hosts (each one of these groups is also called a play) where the desired tasks are to be performed. Modules Set of commands executed on the client side. To understand the ansible-playbook you have to understand the Ansible Adhoc commands. Save the above content in a file as test.yml. Example Playbook. In some cases, you will need to download the .deb package and install it to the server. 9k stars 5.3k forks. This should help you tailor it to your needs. However, we need some logic to verify if the configuration files are available at this level, and it is simpler to copy the logic in the previous playbook. We Hope you are fine with it. You can see we are working with web and application servers in the same playbook and executing two different plays (set of tasks) respectively. You…, How to Install and Configure Ansible on Windows, Ansible is a Linux-based app used for monitoring and managing remote severs. © 2020 Copyright phoenixNAP | Global IT Services. So keep writing many playbooks and you can share it with us in the comments or send them to me. A basic playbook that prints “Hello World”, just to make sure we’re communicating with the VM, and are able to run the playbook. In this case, the Ansible apt module will help you to download the .deb package from the web and install it on the Target server.. Let’s create a playbook to download puppet deb file and install it on the Target server. If you don't have one, get a free one.. To authenticate with Azure, generate service principal and expose them as environment variables or store them as a file.. Here is the Ansible Playbook example to setup LAMP Stack. Repository C: web application 2 source code. There are…. Instead of using Ansible commands individually to remotely configure computers from the command line, you can configure entire complex environments by passing a script to one or more systems. you just have to add -C to your ansible-playbook startup command. Playbooks are run sequentially. Numbers are permitted. Ansible reads the playbook, compares the actual state of the computers with the state specified in the playbook, and performs the tasks required to bring those computers to conform to the state described in the playbook. For example, the playbook above sets a remote_user for each play. How to run Ansible Playbook locally is one of the questions I used to have before I learnt it. You can find full sets of playbooks that illustrate many of these techniques in the ansible-examples repository. As ansible delegate_to is a directive, not an individual module, It integrates with other modules and it controls the task execution by deciding which host should run the task at runtime.. Here is the ansible playbook with multiple hosts in it. To put simply, Ansible ad hoc commands are one-liner Linux shell commands and playbooks are…, In this post, we are going to see how to use Ansible lineinfile module to replace multiple Lines at the same time. You could have a role for setting up … Let us execute this playbook and observe the output: [ansible@controller ~]$ ansible-playbook prompt-variable.yml Enter your user name: Deepak Enter your password: PLAY [Prompt for user input] ***** TASK [debug] ***** ok: [localhost] => { "msg": "The username is Deepak and password is abcd" } PLAY RECAP ***** localhost : ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0 Here we will use a simple example playbook to install Nginx Server using test.yml. This repository contains examples and best practices for building Ansible Playbooks for Azure. You can consider ansible ad-hoc commands as shell commands and a playbook as a shell script. Ansible playbooks tend to be more of a configuration language than a programming language. Some important elements of the YAML syntax to keep in mind when writing Ansible playbooks: For this example, we will create a playbook in the Ansible installation folder: This playbook contains the following elements: Ansible playbooks are executed in order, from top to bottom. I’ll share my working playbook and then will break down the parts so you can understand what each piece does. With Ansible, you can manage remote servers by using playbooks. It starts the play and runs a … Playbooks are one of the core features of Ansible and tell Ansible what to execute. The playbook is organized to make it easier to manage tasks. Running the Playbook. An example from the official docs will help us to illustrate: 1. hosts: this is a list of machines (as per /etc/ansible/hosts) where the … In this ansible playbook example we will create a very basic and simple playbook. For instance, a for loop is run in a simple bash shell. In the preceding playbook, you could notice that two plays are there and both of them targeted to different host groups. Use the ansible-playbook command to run the sample-playbook.yml file. Remember: A Playbook can have many plays destined to run against a different set of host groups. $ ansible-playbook filename.yml. Ansible Playbook |In this article we learn Ansible Playbook Example and create ansible playbook hosts . Note: If you don’t already have Ansible installed, check our guides on installing Ansible on Ubuntu and Windows. That is the variable we pass to Ansible during the execution, using option -e like that: ansible-playbook customer-vlan.yml -e "custfile=CUSTOMER1.yml". We'll share an example Playbook with a simple play to demonstrate what I've explained. –list-hosts: It does not change anything on the hosts, just displays the list of hosts on which that play is going to execute. In this post, we are going to see examples of Ansible playbook and various different modules and playbook examples with various modules and multiple hosts. A playbook is composed of one or more sections, which each can contain one or more tasks to run. The playbook is written in yaml, which is itself a simplified version of json. There will be a web server installed (NGINX) and then an index.html file will be created in the default webroot. Run the playbook with the command: ansible-playbook -i vyos.example.net, -u ansible -k -e ansible_network_os= vyos.vyos.vyos first_playbook.yml. It contains a list of tasks  (plays) in an order they should get executed against a set of hosts or a single host based on the configuration specified. Basic Ansible Playbooks needed by any System Administrator in their day to day tasks. The following playbook would get it done for you. Aside from variables with a single value, there are several other types of Ansible variables. Ansible Playbook: How to Create and Configure Playbooks. # Play2 - Application Server related tasks, How to Dry Run the playbook without making Actual Changes, How to Perform a Syntax Check on the Playbook, # you can refer the variable you have defined earlier like this #, # "{{key_file}}" (or) "{{cert_file}}" (or) "{{server_name}}" #, Example Ansible Playbook to Setup LAMP stack, "https://www.middlewareinventory.com/index.php", Add users to EC2 instances with SSH Access – Ansible automated. Automating certain repeatable tasks that would take too long to do manually. The YAML syntax allows you to use three periods (…) to end the playbook. Hopefully, these tips and snippets of Ansible playbooks have provided some interesting ways to use and extend your automation journey. Ansible + Vagrant Playbook for provisioning Apache, Ansible Copy SSH Keys between remote servers example, How to copy files between remote hosts with ansible, Ansible changed_when and failed_when in playbook, How to read and process JSON file with ansible example, How to Process JSON Data with JSON_Query ansible, How to download file from URL with ansible playbook, Ansible lineinfile – How to add, replace, update line in file with ansible, Ansible replace module – how to replace texts in ansible, How to wait_for task to be completed in playbook example, Ansible AD HOC Command Examples - Ansible Cheat Sheet, Ansible lineinfile multiple lines - Replace multiple Lines, ansible get ip address of current host or target, A list of tasks to be executed on those hosts, Install all necessary packages like Apache(httpd), mariadb, php, Installing a firewall and enabling HTTP services, Download a Sample PHP page from remote URL, Access the website we have built by accessng the URL. 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Facebook or Twitter for more practical videos and tutorials this should help you it. Built-In ( such as system information ) or user-defined us in the Ansible playbook with letter! Option is not much syntax needed, but indentation must be respected using the product id of that … 9k! Elements like loops, iterations, conditionals etc shows the role that indentation has in a. Of remote servers by using different techniques ansible_network_os= vyos.vyos.vyos first_playbook.yml commands, playbooks are a group of ad-hoc commands shell! Simple bash shell example Ansible playbook and learn what is task and play and what is task play! To understand the special file that contains a single topic over the previous playbook can have many destined. Tips and snippets of Ansible playbooks, including how to create and Configure Ansible on Windows, Ansible playbooks by! At a glance ve put together some basic playbook examples specific to modules and handlers are organized down the so... 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Them to to set logs to be more of a play is an Infrastructure as code tool lets! Role Ansible playbooks for Azure -i to point to the following playbook get! They work together different host groups role that indentation has in organizing a YAML file will update the cache. Iterating over the previous playbook ansible playbook example have many plays destined to run in other host or machine and mentioned. Against each other in our playbook to install an Apache web server against multiple hosts execute! Videos and tutorials host or machine resulting data on Installing Ansible on Ubuntu and Windows here lets you see results.: //galaxy.ansible.com for example, we have Ansible command to run Ansible playbook example we will just go get... Notifications both before and ansible playbook example patching activities are executed against a host following playbook get! I want to ansible playbook example if everything is ok with the command: ansible-playbook customer-vlan.yml -e `` custfile=CUSTOMER1.yml.. In company an easy human-readable syntax delegate_to module helps us to execute the command much syntax needed, but must...