Ansible Dynamic Inventory Python Example

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This script may reach out into external data sources and return data, or it can just parse local data that already exists but may not be in the Ansible inventory ini format. Static inventory can be used in small organizations which has small to medium infrastructure. server) information of an Ansible project could be. A dynamic inventory source (or plugin) is an executable that Ansible will call at runtime to discover real-time inventory data. 8 as Ansible dynamic inventory source - Red Hat Customer Portal. 7, Ansible also contains support for managing Windows machines. Automation with runtime variables - Users choose some variable inputs we won't know ahead of time. When doing so, it is possible to mix both dynamic and statically managed inventory sources in the same ansible run. The inventory files contain a host list of managed nodes, when ansible accessing the client it look into inventory. Now in this module we're going to be discussing the inventory component, as well as Ansible's configuration. This retrospective from a developer on lessons from using Ansible exclusively for 2 years explains his rationale for choosing Ansible over Puppet and Chef, then goes through several use cases and best practices learned over time with the tool. Developing Dynamic Inventory Sources. Handlers are just like regular tasks in an Ansible playbook but are only run if the Task contains a notify directive and also indicates that it changed something. This executable may reach out into external data sources and return data, or it can just parse local data that already exists but may not be in the Ansible inventory ini format. Let’s say you have a playbook called web-app. Hosted Apache Solr's infrastructure is built using a custom dynamic inventory to allow for centrally-controlled server provisioning and. A common use case is to build servers with Terraform, and have Ansible configure them. You can specify a different inventory file using the -i option on the command-line. Dynamic Inventory-* While Ansible provides a basic text based system as described previously, it also has the ability. For the sake of this book, we will query cloud providers to get data and build the inventory. If you like this article, consider sponsoring me by trying out a Digital Ocean VPS. All you need is SSH access and Python installed on the relevant machines. We are very excited to release another new Ansible script that will make automating tasks with Ansible easier than ever, leveraging Device42’s up to date inventory to generate dynamic, real-time inventories to be used in conjunction with the. (note: Cobbler was originally written by Michael DeHaan and is now led by James Cammarata, who also works for Ansible, Inc). Being a popular language, there’s also a good chance that you’re familiar with it, or at least can find enough resources online to start learning. py - a new one based on pyvmomi; Refer to the code and the configuration files (vmware. Welcome to another post in our Getting Started series. Above just an example of an ansible static inventory, define the host in a. They can be used to loop through a set of given values, access various information like the hostname of a system…. cfg configuration files (see Listing 3a and Listing 3b) are packed. However, it is simple to create a dynamic inventory script by ourselves. The Skytap dynamic inventory for Ansible allows you to manage and configure Skytap VMs using Ansible commands and playbooks. To be able to use this VMware dynamic inventory plugin, you need to enable it first by specifying the following in the ansible. Below is an example of a very basic Ansible hosts file. Ansible let's you manage that with dynamic inventory. You will be introduced to YAML. The location does not matter at all, you have to pass the path to Ansible when you call Ansib. The inventory contains credentials required to access the node’s BMC via IPMI. Don't pay attention to the 'HOW', just the 'WHAT'. This example test case for a Wildfly role verifies that OS service is enabled, a process is listening in port 8080, and authentication is properly configurated. intro_inventory. ini to be present alongside it. As described in Working With Dynamic Inventory, Ansible can pull inventory information from dynamic sources, including cloud sources, using the supplied inventory plugins. Advanced Ansible Interview Questions and answers for experienced. Thought the article, you can use Ansible tutorial beginners as above. Ansible easily supports all of these options via an external inventory system. Bottom line: Ansible uses the more sensible option of a source control system for its source of truth, while with Chef, every Chef server itself is the source of truth. Ansible define ssh key per host using ansible_ssh_private_key_file. Working With Dynamic Inventory¶. Using Ansible and Windows ¶. cfg file is a directory. 2 Source of format: https:. The ec2_module documentation can be seen here. Donate to the Python Software Foundation or Purchase a PyCharm License to Benefit the PSF!. Ansible dynamic inventory that queries the Foreman. This approach becomes impractical as our inventory grows and instances launch and terminate in the cloud. A static JSON file with flawed syntax is not a "dynamic inventory". Static inventory can be used in small organizations which has small to medium infrastructure. Ansible can control Windows systems using Windows Remote Management (WinRM). Automation Examples Using Device42’s Ansible Dynamic Inventory Script January 5, 2017 4:56pm Matt Altieri 0 Comments Free utility, Integration. As described in Working With Dynamic Inventory, Ansible can pull inventory information from dynamic sources, including cloud sources, using the supplied inventory plugins. Conclusion: This is all about Configuring the Ansible Dynamic Inventory in Linux Server. That's good enough for now. py Now, that we have our inventory pointed to the "Dynamic Inventory" file, let's try to ping all our EC2 instances. All you need is SSH access and Python installed on the relevant machines. For example, on all VMs in Azure in a certain resource group, certain location or with a certain tag. playbook import PlayBook from ansible. Example: Deploying a Django App; Aliases and Ports; Groups of Groups; Numbered Hosts (Pets versus Cattle) Hosts and Group Variables: Inside the Inventory; Host and Group Variables: In Their Own Files; Dynamic Inventory. 6 or greater. In this tutorial we will shown you how to create custom Ansible modules with Python. Generate ansible dynamic inventory from static inventory. How do I tie Ansible's inventory to Cobbler? How do I use my static and dynamic inventory files together in an ansible playbook? Recent in Python. In the above example, Ansible will do the ping test for servers collected by dynamic inventory with tag key Name and Value with suffix "awslab". yaml - specifies the provider arguments and optional filters; infoblox. Extendable Python module for ansible EC2 inventories. Ansible Tower also provides a database to store inventory results that is both web and REST Accessible. Ansible define ssh key per host using ansible_ssh_private_key_file. Configure Ansible to use the inventory. For more information about Ansible inventory, see Working with Inventory. py should print out something like this:. Hosted Apache Solr's infrastructure is built using a custom dynamic inventory to allow for centrally-controlled server provisioning and. And the management of VM instances through tags will be very easy. Generarates inventory for ansible from etcd using python-etcd library. This term "Dynamic Inventory" refers to how the host (ie. Create Ansible playbook examples with custom Powershell Ansible modules. Now to do the deployment on this EC2 instance through ansible you need the details. If needed, Ansible can easily connect with Kerberos, LDAP, and other centralized authentication management systems. [ansible-project] Creating a dynamic inventory module (Python) with special return structure and parameters. Defining State. py can help you control the configuration profile to use, the compartment to limit your search to, etc. Github repository Official Website. There are two files that need to be located under the contrib/inventory/ in the Ansible project: infoblox. This is a dynamic Inventory script for Ansible that turns an Excel Spreadsheet into an Inventory. using Ansible Galaxy; Use Dynamic Inventory in. By default Ansible assumes it can find a /usr/bin/python on the remote system that is a 2. It can also be used as a client library for other python apps, or as a reference for others developing API interactions with Tower’s REST API. Variables defined in the playbooks or inventory can also be used. Creating a droplet with Ansible DigitalOcean dynamic inventory with digital_ocean. Developing the Ansible Core Engine. Examples and counter-examples of Ansible inventory files. ini to filter hosts and create arbitrary groups. inventory import Host, Inventory from ansible import callbacks from ansible import utils Build your inventory. A dynamic inventory is a script that is called by Ansible which returns a JSON array of hosts. The Ansible documentation includes some examples for AWS EC2 and OpenStack, but if you’re not using the world’s most popular cloud service,. Some variables can also affect the way a playbook is run, like the ansible_python_interpreter variable that we'll see in a moment. This is VERY handy to learn how to run Ansible programmatically, as that's exactly what these commands are doing! Use a vault password like so for inventory and like so for other use (variables). How to manage a dynamic inventory using ansible on AWS Submitted by cpeters on Mon, 09/05/2016 - 22:30 Building on the ansible tutorial from earlier , this tutorial shows you how to use your existing virtual environment to control your AWS ansible inventory. Create a static inventory, use conditions to run provisioner if vm not present, use vmware_facts to gather IP and other stuff needed etc. Let's clear the things up regarding static and dynamic inventories. The idea is that OSP director users should be very easily to set up a dynamic inventory which talks to the undercloud and which would allow them to easily run ad-hoc playbooks against their overcloud nodes. This chapter discusses the Python API. A quick introduction to building and creating writing custom Ansible modules. Be aware that this question could be implemented in other ways. All arguments that are defined in this variable are added to the sftp/scp/ssh command line when connecting to the relevant host. Red Hat Satellite Dynamic Inventory for Ansible. Ansible static inventory (INI-like). Inventory file path*: Specify the path to inventory host file on Ansible/Agent machine. In this article, I will use the Ansible Inventory shown in Example 2 to perform actions against the desired hosts (which has been paired down for brevity):. Ansible supports two ways to connect with external inventory: Inventory Plugins and inventory scripts. Normally Ansible requires an inventory file to be created, to know which machines it is meant to operate on. A static JSON file with flawed syntax is not a "dynamic inventory". Static and Dynamic Inventory. Ansible's inventory consists of all the end nodes or target hosts that can be managed by the Ansible host, which is also known as the Ansible controller. You can have multiple inventory files, and you don't need to use the hosts naming convention, but it's common. Work with Ansible dynamic inventories. Ansible Engine is a supported product built from the Ansible community project, and Ansible Tower is the framework for the automation that Ansible Engine does. In this post I will be sharing the way you can use multiple inventory files when running your playbooks and how to organize them. Ansible told you that my_dynamic_inventory --list is not valid JSON syntax. Ansible and Python 3. 3) Python 3 support, which seems to work well for most Ansible modules. Alternatively Inventory can be specified inline. As described in Working With Dynamic Inventory, Ansible can pull inventory information from dynamic sources, including cloud sources, using the supplied inventory plugins. In this article, we will creating custom dynamic inventory from MySQL database with Ansible using Python script. I have used a method where Terraform basically wrote the Ansible inventory for me. This is helpful whenever you get an Excel export from another Tool, containing Information on server, which you need to quickly access via Ansible, without manually writing an Inventory file beforehand. Example: The Cobbler External Inventory Script ¶. Debugging modules. That's how we are able to run specific command in an environment as dynamic as AWS later on. Not only is this inventory configurable, but you can also use multiple inventory files at the same time and pull inventory from dynamic or cloud sources or different formats (YAML, ini, etc), as described in Working With Dynamic Inventory. Ansible comes packed with a lot of built-in modules (almost for all the tasks), but for some custom task, you can write custom modules - can be implemented in any language, including Perl, Bash, or Ruby - but can leverage some useful communal library code if written in Python. This book is perfect for developers and administrators who are familiar with Ansible and Python programming, but have no knowledge of how to. [5][iaas_broker] Ability to return dashboard_url during provision AND update. It is basically a python script which makes an API call to get. For example, ansible-pull configures a system to pull Ansible playbooks from a source code repository and run them on a schedule. Ansible integrates all of these options via a dynamic external inventory system. Host variables. Ansible variables come from a variety of sources. You can also specify an alternative path for an intentory file with the -i flag. By default, the Ansible CLI will look for a system-wide Ansible inventory file in /etc/ansible/hosts. Task 2: Generate a Dynamic Inventory. install the ncclient python package on your control node(s) with pip install ncclient; enable NETCONF on the Junos OS device(s) To enable NETCONF on a new switch via Ansible, use the junos_netconf module via the CLI connection. Ansible is a tool which is written in Python (and is therefore easy to extend if you know Python). Welcome to another post in our Getting Started series. The inventory is a single file called host with the contents "leaf1" inside. py file into your inventory folder in Ansible Copy the src/hosts. I was able to use Terraform variables to insert the IPs into the inventory file. py (an example through ansible. Ansible Package Python version 2. An Ansible2 Tutorial. Types of Ansible Inventories: • Static Inventory • Dynamic. If you are trying to add hosts with a similar style to Ansible inventory you use a counter block like the next example: Inventory file with similar style hosts:. Automation Examples Using Device42's Ansible Dynamic Inventory Script January 5, 2017 4:56pm Matt Altieri 0 Comments Free utility, Integration. Here's an example from the Ansible documentation. Ansible will accept any kind of executable file as an inventory file, so you can build your own dynamic inventory however you like, as long as you can pass it to Ansible as JSON. A static JSON file with flawed syntax is not a "dynamic inventory". In this tutorial we will shown you how to create custom Ansible modules with Python. The CM tool integrates with other systems management and hosting technologies, including asset libraries, monitoring and collaboration software, and cloud and virtualization platforms. It is a python script which queries GCE during the Ansible run time. And yes, there's an example there for an OpenStack dynamic inventory. None of these are designed to reflect best practices for using Ansible. Using a Dynamic Inventory. Ansible inventory is a means for describing hosts and groups. Include with tags - include: deploy. The inventory contains credentials required to access the node’s BMC via IPMI. Extendable Python module for ansible EC2 inventories. On the other hand - in advanced scope - you can wrap Ansible (use python Ansible code as a library) with your own Python scripts! It would act a bit like Fabric then. psutil (process and system utilities) is a cross-platform library for retrieving information on running processes and system utilization (CPU, memory, disks, network, sensors) in Python. DevOps, Cloud, if you have any question, please send mail to me (dubaek@gmail. Ansible releases a new major release of Ansible approximately three to four times per year. Grouping by fact values enables you to run Ansible playbooks on, perhaps, servers with just a certain kernel version or a specific operating system release. The good news is that we don’t need to install any program on servers, everything will be done locally by Ansible and ansible-cmd. I had similar issue, I didn't find any solution, so I just modified my dynamic inventory to use OS Environment variable if the user does not pass --env. Example of. py can take various arguments in the. The Ansile inventory file is one of the most important pieces of your setup. py file into your inventory folder in Ansible Copy the src/hosts. Learn task automation using Ansible playbooks and Ansible vaults for securing sensitive data: In our previous Ansible tutorial #1, we learned about the different components of Ansible and how to install & configure this tool with various modules. a static inventory file, a dynamic inventory script or even multiple inventories stored in the same directory). sudo pip install boto. A dynamic inventory source (or plugin) is an executable that Ansible will call at runtime to discover real-time inventory data. etcd dynamic inventory script. I've created four inventory files, one for each stage (DTAP). Most of the dynamic inventory scripts that are available for Ansible also include a way of discovering what that inventory looks like so that we can see what groups are available to us and code. Kolla-Ansible comes with all-in-one and multinode example inventory files. I have used a method where Terraform basically wrote the Ansible inventory for me. A dynamic inventory is a script that is called by Ansible which returns a JSON array of hosts. As described in Working With Dynamic Inventory, Ansible can pull inventory information from dynamic sources, including cloud sources, using the supplied inventory plugins. Handlers are just like regular tasks in an Ansible playbook but are only run if the Task contains a notify directive and also indicates that it changed something. Optionally, Replace the host list of ansible static inventory with ServiceAddress registered in consul service. The inventory script loads all or parts of VMs on vSphere, u can use it to run other playbooks agains it. ansible-playbook -i inventory/dyn. Tower syncs with all Ansible dynamic inventory sources you might be using, and also includes a graphical inventory editor. Missing a module? Just write your own in python What’s not to like? Well, I already have a way to remove directories in Unix, rmdir, and a way to remove directories in Python, os. By using a container, you can guarantee that you will share the same environment. intro_inventory. Writing a Dynamic Inventory Script for Ansible Posted on Tue 09 May 2017 in automation One of the cool features of Ansible is the ability to separate out your hosts in different groups in an inventory file. 이게 얼마만에 글인지 ㅠㅠ. We will start with a brief overview of OpenStack and Ansible and highlight some best practices. To execute any command on a node, use the -a option followed by the command you want to run, in quotes. ini, vmware_inventory. A static Ansible inventory is just an INI-style file that describes your hosts and groups, and optionally some variables that apply to your hosts and groups. Ansible is decentralized-it relies on your existing OS credentials to control access to remote machines. Read more about how to integrate steps into your Pipeline in the Steps section of the Pipeline Syntax page. There are two files that need to be located under the contrib/inventory/ in the Ansible project: infoblox. 0 the core ansible got rewritten and the API was mostly rewritten. Updated for Ansible2! Ansible is one of the simplest server provisioning and configuration management tools. A function is idempotent if repeated applications has the same affect as a single application. Ansible static inventory (INI-like). py script uses the OCI Python SDK to query OCI compute instances in your tenancy, and builds a dynamic inventory that can then be used in your Ansible playbooks. They are extracted from open source Python projects. Ansible Tower CLI¶. Here I have created test dynamic inventory script with python to get data from MySQL and Ansible will use it as an inventory source as long as it returns a JSON structure with the --list option. 0 the core ansible got rewritten and the API was mostly rewritten. Be aware that there are major differences between Ansible 2. py - python script that retrieves inventory. This is part one of a two-part tutorial on Ansible. ansible-dynamic-inventory. In this tutorial we will shown you how to create custom Ansible modules with Python. pub to authorized_keys of root user in Linux VM. For AWS, Ansible provides an EC2 AWS Dynamic Inventory script out-of-the-box. Simply cut and paste the code snippets from the code blocks below. Types of Ansible Inventories: • Static Inventory • Dynamic. Ansible uses an inventory file to manage and organize your servers. Something I just remembered, just for fun, I created another versions of " Ansible module to list groups in inventory - Python " b Resolve redirection internally from upstream - Nginx. Inventory Ansible uses an ‘inventory’ to identify all servers that it manages. Here in this post coding compiler presenting list of scenario based ansible devops interview questions and answers. Another advantage of Ansible over Chef is how it manages its inventory of host systems. 6 or greater. This example Ansible playbook sets up a controller. Inventory file path*: Specify the path to inventory host file on Ansible/Agent machine. Ansible inventory is a means for describing hosts and groups. Documentation for each of the following releases is available. 4, Ansible has inventory plugins to make this flexible and customizable. If you have defined an alias for a host, then this is the alias name. It is basically a python script which makes an API call to get. A function is idempotent if repeated applications has the same affect as a single application. Donate to the Python Software Foundation or Purchase a PyCharm License to Benefit the PSF!. Create infrastructure with Terraform and then use Ansible with dynamic inventory regardless of how your instances were created. In this article, we will creating custom dynamic inventory from MySQL database with Ansible using Python script. ansible-playbook -i inventory/dyn. ansible Tutorial ansible YouTube This modified text is an extract of the original Stack Overflow Documentation created by following contributors and released under CC BY-SA 3. As described in. Package standard-test-roles provides shared Ansible roles and inventory scripts implementing the Standard Test Interface version 1. They are extracted from open source Python projects. The script assumes etcd. The configuration file ec2. py を使った Dyamic Inventory を利用して、タグをつけた EC2 インスタンスに対して playbook を実行. This is almost certainly caused by placing the EC2 dynamic inventory script in you project's. Ansible provides a very capable Python API for modules Modules can be written in any programming language that understands JSON Provides a consistent “UX” for all tasks Gives you and your ops team an “on ramp” to scaling your tasks across the infrastructure $ ansible localhost -m my_task -a “arg1=foo arg2=bar”. This is helpful whenever you get an Excel export from another Tool, containing Information on server, which you need to quickly access via Ansible, without manually writing an Inventory file beforehand. In the meantime, I've found two projects that build rpm packages for AWX. com/2016/10/dynamic. Vervas G Hi Jazzed, I used your example as a base for triggering ansible through a python script, however while the output suggest that the connection to the node is made and the playbook is running, individual steps on the various roles fail consistently in contrast to running the playbook using the ansible-playbook command line tool passing. Ansible can control Windows systems using Windows Remote Management (WinRM). It is a python script which queries GCE during the Ansible run time. Other than the user defined variables, Ansible supports many inbuilt variables. Python for Network Engineers Articles. This is my last requirement and because of that I decided to share some simple Python snippets that help you to understand how to use Ansible as a Python library. This example Ansible playbook sets up a controller. The following are code examples for showing how to use ansible. Working With Dynamic Inventory¶. For information about writing your own dynamic inventory source, see Developing Dynamic Inventory Sources. Welcome to another post in our Getting Started series. You can also use it along with the Module Index and the other docs to build your own Playbooks later. Set up your platform-level variables just like in the CLI example above, then run a playbook task like this:. Don't pay attention to the 'HOW', just the 'WHAT'. Unfortunately, I haven't used Ansible to spin up the VMs, I've only used Terraform for. To use that mechanism the only thing which is needed is a program resp. An in-depth look at Ansible Roles, Integration with Jenkins, and Ansible S3 and EC2 modules: In part 2 of the series on Ansible tutorials, we learned how Ans1ible playbooks are used to execute multiple tasks and get all the target machines or servers to a particular desired state. This script may reach out into external data sources and return data, or it can just parse local data that already exists but may not be in the Ansible inventory ini format. Ansible assumes, unless otherwise instructed, that the python binary will live at /usr/bin/python. For Ansible to automate a Linux Server, Network device or Cloud server it has to exist within the inventory (also known as the Ansible hosts file) and saved in either YAML or INI format.