Dynamic AWS Inventory in Ansible
Updated
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I have been working at the rapid changing software development field over 19 years as a software engineer, architect, devops. I am an expert in designing and implementing scalable architectures to deal with large transactions and massive requests on e-commerce and messaging services. I am skillful at using opensource technologies like Node.js, Nginx, Redis, Cassandra, ELK and Kafka to secure site reliability. I also have proficiency in C#, Java, Javascript, Python and Go.
Ansible gives powerful ways to manage a lot of EC2 instances and Cloud infrastructures with YAML. This snippet would be helpful to gather host informations such as private_ip_address even instances are added by EC2 autoscaling in AWS.
# inventory.aws_ec2.yml
plugin: aws_ec2
regions:
- ap-northeast-1
filters:
instance-state-name: running
hostnames:
- tag:Name
groups:
# dev
dev : "'-dev-' in tags.Name"
# qa
qa : "'-qa-' in tags.Name"
# prod
prod : "'-prod-' in tags.Name"
keyed_groups:
- key: tags['aws:autoscaling:groupName']
prefix: ''
compose:
# Use the private IP address to connect to the host
# (note: this does not modify inventory_hostname, which is set via I(hostnames))
ansible_host: private_ip_address
# invoke command 'df' to all instances in dev group
ansible -i inventory.aws_ec2.yml dev -a 'df'