aws ec2 module getting error - One or more undefined variables: 'instances' is undefined

[Andy Raj]

Hello folks,

New to ansible, using version - 1.7.2. I am trying to write a play to launch an instance on AWS and install my packages on it. i need to automatically add the DNS name of the launched instance to my hosts file. But i am getting the error - One or more undefined variables: 'instances' is undefined

I am following the example here - http://docs.ansible.com/guide_aws.html

Below link to my playbook.
https://github.com/raj-andy1/macguffin/blob/master/aws-plays/aws-ec2.yaml

Please help

Below is the output i am getting

PLAY [localhost] **************************************************************

TASK: [make one instance] *****************************************************
changed: [localhost]

TASK: [debug var=ec2_info] ****************************************************
ok: [localhost] => {
    "ec2_info": {
        "changed": true,
        "instance_ids": [
            "i-7e343873"
        ],
        "instances": [
            {
                "ami_launch_index": "0",
                "architecture": "x86_64",
                "dns_name": "ec2-54-69-18-39.us-west-2.compute.amazonaws.com",
                "ebs_optimized": false,
                "hypervisor": "xen",
                "id": "i-7e343873",
                "image_id": "ami-b6bdde86",
                "instance_type": "t1.micro",
                "kernel": "aki-fc37bacc",
                "key_name": null,
                "launch_time": "2014-09-30T04:37:29.000Z",
                "placement": "us-west-2b",
                "private_dns_name": "ip-172-31-28-117.us-west-2.compute.internal",
                "private_ip": "172.31.28.117",
                "public_dns_name": "ec2-54-69-18-39.us-west-2.compute.amazonaws.com",
                "public_ip": "54.69.18.39",
                "ramdisk": null,
                "region": "us-west-2",
                "root_device_name": "/dev/sda1",
                "root_device_type": "ebs",
                "state": "running",
                "state_code": 16,
                "virtualization_type": "paravirtual"
            }
        ],
        "invocation": {
            "module_args": "image=ami-b6bdde86 instance_type=t1.micro region=us-west-2 wait=true",
            "module_name": "ec2"
        },
        "tagged_instances": []
    }
}

TASK: [debug msg="Assigned public DNS name is {{ instances.public_dns_name }}"] ***
fatal: [localhost] => One or more undefined variables: 'instances' is undefined

FATAL: all hosts have already failed -- aborting

PLAY RECAP ********************************************************************
           to retry, use: --limit @/Users/andyr/aws-ec2.yaml.retry

localhost                  : ok=2    changed=1    unreachable=1    failed=0

[Michael DeHaan]

Reading your playbook above, there's no point at which you register into a variable called "instances", which is the problem.

Move your debug line up and see what is in it:

- debug: var=ec2_info

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[Andy Raj]

Hi Mike

Thanks for your response. I tried to follow the example on Ansible's website(http://docs.ansible.com/guide_aws.html) but still no success. Not sure what is wrong
Can you please help?

Playbook location - https://github.com/raj-andy1/macguffin/blob/master/aws-plays/aws-ec2.yaml

Thanks
Andy

PLAY [localhost] **************************************************************

TASK: [make one instance] *****************************************************
changed: [localhost]

TASK: [debug var=ec2_info] ****************************************************
ok: [localhost] => {
    "ec2_info": {
        "changed": true,
        "instance_ids": [

            "i-25918128"

        ],
        "instances": [
            {
                "ami_launch_index": "0",
                "architecture": "x86_64",

                "dns_name": "ec2-54-69-33-81.us-west-2.compute.amazonaws.com",

                "ebs_optimized": false,
                "hypervisor": "xen",

                "id": "i-25918128",

                "image_id": "ami-b6bdde86",
                "instance_type": "t1.micro",
                "kernel": "aki-fc37bacc",
                "key_name": null,

                "launch_time": "2014-10-07T22:57:06.000Z",
                "placement": "us-west-2b",
                "private_dns_name": "ip-172-31-29-210.us-west-2.compute.internal",
                "private_ip": "172.31.29.210",
                "public_dns_name": "ec2-54-69-33-81.us-west-2.compute.amazonaws.com",
                "public_ip": "54.69.33.81",

                "ramdisk": null,
                "region": "us-west-2",
                "root_device_name": "/dev/sda1",
                "root_device_type": "ebs",
                "state": "running",
                "state_code": 16,
                "virtualization_type": "paravirtual"
            }
        ],
        "invocation": {
            "module_args": "image=ami-b6bdde86 instance_type=t1.micro region=us-west-2 wait=true",
            "module_name": "ec2"
        },
        "tagged_instances": []
    }
}

TASK: [debug var=item with_items:ec2_info.instance_ids] ***********************
ok: [localhost] => (item={{ item }}) => {
    "item": "{{ item }}"
}

TASK: [debug msg="Assigned public DNS name is {{ item.dns_name }}" with_items:ec2_info.instances] ***
fatal: [localhost] => One or more undefined variables: 'item' is undefined

FATAL: all hosts have already failed -- aborting

PLAY RECAP ********************************************************************
           to retry, use: --limit @/Users/andyr/aws-ec2.yaml.retry

localhost                  : ok=3    changed=1    unreachable=1    failed=0