VPC redefine: TypeError: string indices must be integers, not str

[Arbab Nazar]

Hi Everyone, I am need of help to make it work in order to add the nat instance id as gw for private subnet inside the routing table.

Here is my vpc playbook:

/tasks/vpc.yml

-----------------

---

 - name: VPC | Creating an AWS VPC inside mentioned Region

   local_action:

     module: ec2_vpc

     region: "{{ vpc_region }}"

     state: present

     cidr_block: "{{ vpc_cidr_block }}"

     resource_tags: { "Name":"{{ vpc_name }}_vpc" }

     subnets: "{{ vpc_subnets }}"

     internet_gateway: yes

     route_tables: "{{ public_subnet_rt }}"

=====

here is my vars/vpc.yml file:

---

ec2_inst_id: i-abc1432c

# Variables for VPC

vpc_name: tendo

vpc_region: ap-southeast-2

vpc_cidr_block: 172.25.0.0/16

public_cidr: 172.25.10.0/24

public_az: "{{ vpc_region}}b"

private_cidr: 172.25.20.0/24

private_az: "{{ vpc_region }}a"

nat_private_ip: 172.25.10.10

# Please don't change the variables below, until you know what you are doing

#

# Subnets Defination for VPC

vpc_subnets:

  - cidr: "{{ public_cidr }}" # Public Subnet

    az: "{{ public_az }}"

    resource_tags: { "Name":"{{ vpc_name }}_public_subnet" }

  - cidr: "{{ private_cidr }}" # Private Subnet

    az: "{{ private_az }}"

    resource_tags: { "Name":"{{ vpc_name }}_private_subnet" }

## Routing Table for Public Subnet

public_subnet_rt:

  - subnets:

      - "{{ public_cidr }}"

    routes:

      - dest: 0.0.0.0/0

        gw: igw

When I run the above playbook it work fine:

ansible-playbook -i 'localhost,' --connection=local site.yml -vvvv       2 ↵

PLAY [all] ********************************************************************

TASK: [VPC | Creating an AWS VPC inside mentioned Region] *********************

<127.0.0.1> region=ap-southeast-2 cidr_block=172.25.0.0/16 state=present

<127.0.0.1>

<127.0.0.1>

<127.0.0.1> u'LANG=C LC_CTYPE=C /usr/bin/python /Users/arbab/.ansible/tmp/ansible-tmp-1427103212.79-152394513704427/ec2_vpc; rm -rf /Users/arbab/.ansible/tmp/ansible-tmp-1427103212.79-152394513704427/ >/dev/null 2>&1']

changed: [localhost -> 127.0.0.1] => {"changed": true, "subnets": [{"az": "ap-southeast-2b", "cidr": "172.25.10.0/24", "id": "subnet-70845e15", "resource_tags": {"Name": "tendo_public_subnet"}}, {"az": "ap-southeast-2a", "cidr": "172.25.20.0/24", "id": "subnet-8d1fdffa", "resource_tags": {"Name": "tendo_private_subnet"}}], "vpc": {"cidr_block": "172.25.0.0/16", "dhcp_options_id": "dopt-261e0244", "id": "vpc-9cea26f9", "region": "ap-southeast-2", "state": "available"}, "vpc_id": "vpc-9cea26f9"}

---------------------------------------------------------------------------------------------------

Here is the problem when I redefine the VPC with the nat-instance id as gw. 

=========================================================

- name: NAT | NAT Route

   set_fact:

     private_subnet_rt: '{{ lookup("template", "../templates/nat_routes.json.j2") }}'

 - name: redefine vpc

   local_action:

     module: ec2_vpc

     region: "{{ vpc_region }}"

     state: present

     cidr_block: "{{ vpc_cidr_block }}"

     resource_tags: { "Name":"{{ vpc_name }}_vpc" }

     subnets: "{{ vpc_subnets }}"

     internet_gateway: yes

     route_tables: "{{ private_subnet_rt }}"

Here are the content of the nat_routes.json.j2:

- subnets:

     - {{ public_cidr }}

  routes:

     - dest: 0.0.0.0/0

       gw: "igw"

- subnets:

     - {{ private_cidr }}

  routes:

     - dest: 0.0.0.0/0

       gw: {{ ec2_inst_id }}

I got this error when I run the above playbook after Creating the NAT instance:

TASK: [redefine vpc] **********************************************************

<127.0.0.1> region=ap-southeast-2 cidr_block=172.25.0.0/16 state=present route_tables=- subnets:

- 172.25.10.0/24

routes:

- dest: 0.0.0.0/0

gw: igw

- subnets:

- 172.25.20.0/24

routes:

- dest: 0.0.0.0/0

gw: i-abc1432c

failed: [localhost -> 127.0.0.1] => {"failed": true, "parsed": false}

Traceback (most recent call last):

  File "/Users/arbab/.ansible/tmp/ansible-tmp-1427101746.8-192243069214182/ec2_vpc", line 2413, in <module>

    main()

  File "/Users/arbab/.ansible/tmp/ansible-tmp-1427101746.8-192243069214182/ec2_vpc", line 618, in main

    (vpc_dict, new_vpc_id, subnets_changed, changed) = create_vpc(module, vpc_conn)

  File "/Users/arbab/.ansible/tmp/ansible-tmp-1427101746.8-192243069214182/ec2_vpc", line 425, in create_vpc

    for route in rt['routes']:

TypeError: string indices must be integers, not str

Can you please point me that where I am making mistake. 

Thanks