add_host scope from inside roles

[Nicola Limongi]

Hi all,

I'm a bit confused about the behavior of add_host when used from inside a role or directly in the playbook.

Am I doing something wrong or am I just hitting some role's scope boundary?

THIS WORKS (from the playbook)

---

- name: "provision Ec2"

hosts: localhost

connection: local
gather_facts: false

tasks:

- ec2_instance:

name: "{{ ec2_name }}"

security_groups:

[ecc ecc....]

register: ec2_result

- name: Add new instance to launched group

hosts: localhost

tasks:

- add_host:

hostname: "{{ item.network_interfaces[0].private_ip_address }}"

groupname: launched

with_items: "{{ ec2_result.instances }}"

- name: "config service inside EC2"

hosts: launched

tasks:

[perform config of inside the EC2 ...]

THIS DOES NOT WORK (from inside a role)

Here I'm just encapsulating the EC2 provisioning logic in a role called 'ec2'.

The second play ("config service inside EC2") is skipped because the host is not present in the in memory inventory.

---

- name: "create ec2 common linux"

hosts: localhost

connection: local

gather_facts: false

roles:

- ec2

tasks:

- meta: refresh_inventory

- name: "config service inside EC2"

hosts: launched

tasks:

[perform config of inside the EC2 ...]

./roles/ec2/tasks/main.yml

---

- name: "provision Ec2"

hosts: localhost

connection: local

gather_facts: false

tasks:

- ec2_instance:

name: "{{ ec2_name }}"

security_groups:

[ecc ecc....]

register: ec2_result

- name: Add new instance to launched group

hosts: localhost

tasks:

- add_host:

hostname: "{{ item.network_interfaces[0].private_ip_address }}"

groupname: launched

with_items: "{{ ec2_result.instances }}"

[Vladimir Botka]

The code is one playbook with three plays. It's not possible to put a
playbook "inside a role".

In particular, it's not possible to apply "hosts" in a "Role"
https://docs.ansible.com/ansible/latest/reference_appendices/playbooks_keywords.html#role

HTH,

-vlado

[Nicola Limongi]

Hi Vladimir,

thanks for pointing out that mistake.

I fixed the role, but I still have the same behaviour.

You can find below the full example with the output.

PLAYBOOK

---

- name: "provision EC2"

hosts: localhost

connection: local

vars_files:

- vars/vars_infrastracture.yml

- vars/vars-ec2-ami-linux.yml

- vars/vars-ec2-name.yml

gather_facts: false

roles:

- ec2

tasks:

- meta: refresh_inventory

- name: "config service inside EC2"

hosts: launched

tasks:

- name: niente

debug:

var: tag_service

EC2 ROLE

./roles/ec2/tasks/main.yml

---

- name: "Provision EC2"

ec2_instance:

name: "{{ ec2_name }}"

security_groups:

- "{{ security_group }}"

instance_type: "{{ instance_type }}"

image_id: "{{ image_id }}"

wait: yes

region: "{{ region }}"

key_name: "{{ ec2_keypair }}"

vpc_subnet_id: "{{ subnet_id }}"

volumes:

- device_name: /dev/xvda

ebs:

volume_size: "{{ disk_size }}"

delete_on_termination: true

register: ec2_result

- name: Add new instance to host group

add_host:

hostname: "{{ item.network_interfaces[0].private_ip_address }}"

groupname: launched

with_items: "{{ ec2_result.instances }}"

OUTPUT

$ ansible-playbook test-playbook.yml
[WARNING]: Invalid characters were found in group names and automatically replaced, use -vvvv to see details

PLAY [provision EC2] ***************************************************************************************************************************************************************

TASK [ec2 : Provision EC2] *********************************************************************************************************************************************************
changed: [localhost]

TASK [ec2 : Add new instance to host group] ****************************************************************************************************************************************
changed: [localhost] => (item={u'root_device_type': u'ebs', u'private_dns_name': u'ip-10-69-122-181.eu-west-1.compute.internal', u'cpu_options': {u'threads_per_core': 1, u'core_count': 1}, u'source_dest_check': True, u'monitoring': {u'state': u'disabled'}, u'subnet_id': u'subnet-065072b7239148454', u'ebs_optimized': False, u'state': {u'code': 16, u'name': u'running'}, u'security_groups': [{u'group_id': u'sg-0fc0a74cc52d80915', u'group_name': u'common-webapp-secgroup'}], u'client_token': u'c3cd3468213d4701b137c7529ba2296a', u'virtualization_type': u'hvm', u'root_device_name': u'/dev/xvda', u'tags': {u'Name': u'demo_ec2_deletemeplease'}, u'key_name': u'lsa-common-key', u'image_id': u'ami-04d5cc9b88f9d1d39', u'ena_support': True, u'hibernation_options': {u'configured': False}, u'capacity_reservation_specification': {u'capacity_reservation_preference': u'open'}, u'public_dns_name': u'', u'block_device_mappings': [{u'ebs': {u'status': u'attached', u'delete_on_termination': True, u'attach_time': u'2020-05-06T07:41:42+00:00', u'volume_id': u'vol-078f8b905e3818cb7'}, u'device_name': u'/dev/xvda'}], u'metadata_options': {u'http_endpoint': u'enabled', u'state': u'applied', u'http_tokens': u'optional', u'http_put_response_hop_limit': 1}, u'placement': {u'availability_zone': u'eu-west-1b', u'tenancy': u'default', u'group_name': u''}, u'ami_launch_index': 0, u'hypervisor': u'xen', u'network_interfaces': [{u'status': u'in-use', u'description': u'', u'subnet_id': u'subnet-065072b7239148454', u'interface_type': u'interface', u'ipv6_addresses': [], u'network_interface_id': u'eni-0168283f7fda6cca7', u'private_dns_name': u'ip-10-69-122-181.eu-west-1.compute.internal', u'attachment': {u'status': u'attached', u'device_index': 0, u'attachment_id': u'eni-attach-054ae489dc970a477', u'delete_on_termination': True, u'attach_time': u'2020-05-06T07:41:41+00:00'}, u'private_ip_addresses': [{u'private_ip_address': u'10.69.122.181', u'private_dns_name': u'ip-10-69-122-181.eu-west-1.compute.internal', u'primary': True}], u'mac_address': u'06:19:c8:8b:88:d2', u'private_ip_address': u'10.69.122.181', u'vpc_id': u'vpc-07dd9cf9b9deca621', u'groups': [{u'group_id': u'sg-0fc0a74cc52d80915', u'group_name': u'common-webapp-secgroup'}], u'source_dest_check': True, u'owner_id': u'933762258141'}], u'launch_time': u'2020-05-06T07:41:41+00:00', u'instance_id': u'i-07464f7a1b6593fbd', u'instance_type': u't2.micro', u'architecture': u'x86_64', u'state_transition_reason': u'', u'private_ip_address': u'10.69.122.181', u'vpc_id': u'vpc-07dd9cf9b9deca621', u'product_codes': []})
[WARNING]: Could not match supplied host pattern, ignoring: launched

PLAY [config service inside EC2] ***************************************************************************************************************************************************
skipping: no hosts matched

PLAY RECAP *************************************************************************************************************************************************************************
localhost                  : ok=2    changed=2    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

Nicola

[Brian Coca]

this is just a variable named 'groupname'
groupname: launched

Per the docs https://docs.ansible.com/ansible/latest/modules/add_host_module.html,
if you actually want to add it to the 'launched' group:

groups: launched



--
----------
Brian Coca

[Nicola Limongi]

Hi Brian,

thanks a lot, that was indeed one part of the problem.

I also had to remove the meta: refresh_inventory at the end of the first play.

WORKING VERSION

---

- name: "provision EC2"

hosts: localhost

connection: local

vars_files:

- vars/vars_infrastracture.yml

- vars/vars-ec2-ami-linux.yml

- vars/vars-ec2-name.yml

gather_facts: false

roles:

- ec2

- name: "config service inside EC2"

hosts: launched

tasks:

- name: niente

debug:

var: tag_service

EC2 ROLE

---

- name: "Provision EC2"

ec2_instance:

name: "{{ ec2_name }}"

security_groups:

- "{{ security_group }}"

instance_type: "{{ instance_type }}"

image_id: "{{ image_id }}"

wait: yes

region: "{{ region }}"

key_name: "{{ ec2_keypair }}"

vpc_subnet_id: "{{ subnet_id }}"

volumes:

- device_name: /dev/xvda

ebs:

volume_size: "{{ disk_size }}"

delete_on_termination: true

register: ec2_result

- name: Add new instance to host group

add_host:

host: "{{ item.network_interfaces[0].private_ip_address }}"

groups: launched

with_items: "{{ ec2_result.instances }}"