Inventory contains a list of hostname or IP addresses and follows INI format. # Minimal example using environment vars or instance role credentials # Fetch all hosts in us-east-1, the hostname is the public DNS if it exists, otherwise the private IP address I am trying to get started using Ansible and the aws_ec2 plugin. it gets you this: $ ansible-inventory -i prod.aws_ec2.yml --graph @all: |--@_web: Once done, you can run Ansible as you would normally do. Therefore we need to find a way how to make Ansible works in EC2. Enable the OCI inventory plugin by adding it to your ansible.cfg file. You can also locate these inventory files anywhere on your device, in this example the inventory file is … Dynamic inventory is an ansible plugin that makes an API call to AWS to get the instance information in the run time. The sample configuration above uses Ansible’s built-in AWS EC2 inventory plugin and includes a few basic parameters for connecting to the AWS API. How to use dynamic inventory for aws with ansible. To enable the aws_ec2 plugin add the following statement to the ansible.cfg file: enable_plugins = aws_ec2. Make sure to replace the regions, aws_access_key_id, and aws_secret_access_key parameter values with your AWS region(s) (e.g., us-east-2) and keys.Ansible will use this inventory file to pull all available hosts in the region(s) you … As a follow-up to this; is it also possible to export variables from the dynamic inventory file to be referenced within playbooks? The inventory plugin will download the list of instances right before the playbook execution starts. Here you can see a long list of modules used for different cloud environment. ansible-playbook backup-router.yml -i hosts-2. Since we use Ansible for more than four years, we already have playbooks as our infrastructure as a code. For example: I want to set the default ansible user on OS_TYPE_LINUX_AMZ to ec2-user and the default ansible user to OS_TYPE_LINUX_UBUNTU to ubuntu. We will use "ec2 module" for this tutorial. Dynamic AWS inventory in Ansible. app1.example.com app2.example.com db.example.com ansible_host=192.168.33.30 The above example contains host names and alias for an IP address. Ansible Create AWS EC2 instances Example, How to Create EC2 instance with Ansible. For example: Let me tell you how to Run Ansible Playbook Locally…# AWS EC2 instance listing for our example. if it exists, otherwise the private IP address plugin: aws_ec2 regions: - us-east-1 # Example using filters, Search for Inventory Tracking System with Relevant Results at FastQuickSearch.com. Setting up EC2 External Inventory Script With Ansible. Ansible aws_ec2 inventory plugin example. Or for the openstack plugin the file has to be called clouds.yml or openstack. So goodbye manual inventory edits. If ran on CLI manually it'll output that list on the CLI, very useful for manual inspection.--host IP_ADDRESS - it'll generate detailed information list for that particual host only. The Oracle Cloud Infrastructure inventory plugin, like most inventory plugins shipped with Ansible, is disabled by default. When writing a plugin, always use the provided base classes. The AWS secret key that corresponds to the access key.The AWS security token if using temporary access and secret keys. For a useful example of leveraging the Amazon EC2 instance variables, I currently have two instances with the tag “Ansible Slave” applied to them. Groups example: The ec2.py doesn't have too may options but these main ones are enough to get everything out of it.--list - generates a JSON formated inventory output, exactly what Ansible needs. However, there is an easy solution called ansible dynamic inventory. Simply create another inventory file i.e hosts-2 and at playbook runtime use the -i flag to tell Ansible to use that inventory e.g. If for example you have a tag in each machine called AnsibleRoles then you set this in your something.aws_ec2.yml file: keyed_groups: - key: tags.AnsibleRoles. We know that Ansible works with modules so to work with AWS EC2 Instances we need a separate module. Hello, After a bit of reading, I was able to generate dynamic inventory with the aws_ec2 inventory plugin, and dynamically assign a parent group to keyed_groups.. For example.. plugin: aws_ec2 regions: - us-west-2 filters: instance-state-name: running keyed_groups: - prefix: '' key: placement.region - prefix: '' key: placement.availability_zone parent_group: '_{{ placement.region }}' With Ansible Dry Run feature you can execute the playbook without having to actually make changes on the server. For AWS EC2, this takes the form of an external python script and ini file that can be called via the --inventory (or --i) flag: ansible -i ec2.py -m ping By default, the ec2.py script will create a large number of groups that can be used directly by Ansible’s hosts field, including groupings by … The most straightforward configuration file that the EC2 inventory plugin will consider as valid is: E.g. In most cases, it’s very easy to add new plugins to extend the power of Ansible. aws_ec2 – EC2 inventory source, Get inventory hosts from Amazon Web Services EC2. Because of the changing state of the existing instances I am attempting to use Ansible's Dynamic Inventory via the aws_ec2 inventory plugin as recommended. Inventory plugins allow Ansible users to use external platforms to dynamically discover target hosts and use those platforms as a Source of Truth for their Ansible inventory. Here is the command I supposed to use. An example ansible.cfg file could look like this: [defaults] inventory = ./ansible_plugins enable_plugins = aws_ec2 host_key_checking = False pipelining = True log_path = /var/log/ansible roles_path = ./roles forks = 1000. Plugins must be enabled in your ansible.cfg file to function. That’s including our server configurations and pipelines. Here, db.example.com is an alias set for an host with an IP 192.168.33.30 using Ansible variable ‘ansible_host’. To use Ansible with AWS and CloudFormation, you will first want to customize your project’s ansible.cfg file to enable the aws_ec2 inventory plugin. This plugin has a feature to add hosts to groups in Ansible based on tags on the instances, which is great. AWS EC2 inventory plugin will help us here and provide them for our playbooks. Ansible AWS example, AWS Playbook example. The best example is the AWS EC2 instances. The Ansible plugin loader (the main class responsible for finding and loading files with a specific plugin class) will ignore your plugin class if it doesn’t have the proper base class as a parent object. For simplicity, we will set the ANSIBLE_INVENTORY_ENABLED to steampunk.aws.ec2 and export it: $ export ANSIBLE_INVENTORY_ENABLED=steampunk.aws.ec2 Consult the official documentation for other means of enabling inventory plugins. Below is part of my configuration file as a … ini entries: ini entries: This option allows you to override that, in efforts to allow migration from the old inventory script and matches the sanitization of groups when the script's ``replace_dash_in_groups`` option is set to ``False``. The OCI inventory plugin, like most inventory plugins shipped with Ansible, is disabled by default. Configure Ansible AWS EC2 dynamic inventory plugin. pip install ansible-ec2-inventory Usage-----### As a script ansible-ec2-inventory --config ec2.ini *Note:* if you want to provide a boto profile, prefix the command with `AWS_PROFILE=myprofile`. ### As a Python module Example: ``` {.python} from ansible_ec2_inventory import Ec2Inventory import json def main(): # get path of ec2.ini The inventory is the most basic building block of Ansible architecture. This feature will be removed in version 2.8. How to Use Dynamic Inventory for AWS with Ansible?, Inventory script example: AWS EC2¶. If you use Amazon Web Services EC2, maintaining an inventory file might not be the best approach, because hosts may Ansible integrates all of these options via a dynamic external inventory system. Parameters¶ ansible_host_source (optional) Host variable to use when generating inventory hosts. ... to do that, I can use ansible.cfg file or ansible inventory file but I prefer to do it in a command line as a runtime variable. Choose the ec2 module to provision AWS EC2 Instances. You can get the complete list of cloud modules from Ansible. ... ansible’s simplicity and structure and want to see how it works with AWS.This is going to be a quick introduction to Ansible AWS Ec2 module.Ansible AWS combo is more like Hobbs and Shah ( Sorry! Ansible and EC2. So goodbye manual inventory edits. * Document compose for aws_ec2 inventory plugin * split up examples into several parts with some additional comments ansible locked and limited conversation to collaborators Jun 21, 2019 Sign up for free to subscribe to this conversation on GitHub . To try this, run $ /etc/ansible/ec2.py --list. 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