在Chef配方中获取EC2实例名称

Question

How can I dynamically capture the ec2 instance name on which my Chef recipe is running?

@coderanger I am using below code

Ohai.plugin(:EC2) do 
provides "ec2" 
depends "ec2" collect_data do 
instance_id = ec2['instance_id'] 
end 
end 

How to print the instance id here ?

Answer 1

Assuming you mean the EC2 instance ID, you can find it in node['ec2']['instance_id'] if the EC2 ohai plugin has been activated. If the instance is created via knife ec2 server create this is done automatically for you, and there is an imperfect auto-enable that tries to guess if you're on EC2. If neither of these are the case, you can force it by creating an empty file in /etc/chef/ohai/hints/ec2.json .