Ansible try to query an AWS TG using community-aws module to get TG status - ansible

Question

I'm trying to query an AWS TG using the community-aws module to get TG status,
I want to query a specific TG every few seconds until I see that the state of that TG is "healthy".
So far I have this task in ansible:
- name: Gather information about the target group attached to a particular LB
vars:
ansible_python_interpreter: /usr/bin/python3.6
register: target_health
community.aws.elb_target_group_info:
region: "{{AWS_REGION}}"
target_group_arns: "{{TARGET_GROUP_ARN}}"
collect_targets_health: yes
delegate_to: 127.0.0.1
- debug: msg="return_target_health ={{target_health}}"
- name: iterate items
debug:
msg: "{{ item.targets_health_description }}"
with_items: "{{ target_health.target_groups }}"
The playbook output:
TASK [service : debug] ****************************************************
ok: [service.devbed-vpc.] => {
"msg": "return_target_health ={'target_groups': [{'target_group_arn': 'arn:aws:elasticloadbalancing:us-east-1:4795703XXXXX:targetgroup/Testbed-Vee-8124-TG/b8b282d82426331c', 'target_group_name': 'Testbed-Vee-8124-TG', 'protocol': 'HTTP', 'port': 8124, 'vpc_id': 'vpc-19333d7f', 'health_check_protocol': 'HTTP', 'health_check_port': '8124', 'health_check_enabled': True, 'health_check_interval_seconds': 10, 'health_check_timeout_seconds': 5, 'healthy_threshold_count': 5, 'unhealthy_threshold_count': 2, 'health_check_path': '/health', 'matcher': {'http_code': '200'}, 'load_balancer_arns': ['arn:aws:elasticloadbalancing:us-east-1:4795703XXXXX:loadbalancer/app/Testbed-Vee-ALB/e2b8546cb7196017'], 'target_type': 'instance', 'protocol_version': 'HTTP1', 'stickiness_enabled': 'false', 'deregistration_delay_timeout_seconds': '300', 'stickiness_type': 'lb_cookie', 'stickiness_lb_cookie_duration_seconds': '86400', 'slow_start_duration_seconds': '0', 'load_balancing_algorithm_type': 'round_robin', 'tags': {'Env': 'Testbed'}, 'targets_health_description': [{'target': {'id': 'i-0b9b6e5a2775bXXXX', 'port': 8124}, 'health_check_port': '8124', 'target_health': {'state': 'healthy'}}, {'target': {'id': 'i-0feb307f8bdf6XXXX', 'port': 8124}, 'health_check_port': '8124', 'target_health': {'state': 'healthy'}}]}], 'failed': False, 'changed': False}"
TASK [service : iterate items] ********************************************
ok: [service.devbed-vpc.] => (item={'target_group_arn': 'arn:aws:elasticloadbalancing:us-east-1:4795703XXXXX:targetgroup/Testbed-Vee-8124-TG/b8b282d82426331c', 'target_group_name': 'Testbed-Vee-8124-TG', 'protocol': 'HTTP', 'port': 8124, 'vpc_id': 'vpc-19333d7f', 'health_check_protocol': 'HTTP', 'health_check_port': '8124', 'health_check_enabled': True, 'health_check_interval_seconds': 10, 'health_check_timeout_seconds': 5, 'healthy_threshold_count': 5, 'unhealthy_threshold_count': 2, 'health_check_path': '/health', 'matcher': {'http_code': '200'}, 'load_balancer_arns': ['arn:aws:elasticloadbalancing:us-east-1:4795703XXXXX:loadbalancer/app/Testbed-Vee-ALB/e2b8546cb7196017'], 'target_type': 'instance', 'protocol_version': 'HTTP1', 'stickiness_enabled': 'false', 'deregistration_delay_timeout_seconds': '300', 'stickiness_type': 'lb_cookie', 'stickiness_lb_cookie_duration_seconds': '86400', 'slow_start_duration_seconds': '0', 'load_balancing_algorithm_type': 'round_robin', 'tags': {'Env': 'Testbed'}, 'targets_health_description': [{'target': {'id': 'i-0b9b6e5a2775bXXXX', 'port': 8124}, 'health_check_port': '8124', 'target_health': {'state': 'healthy'}}, {'target': {'id': 'i-0feb307f8bdf6XXXX', 'port': 8124}, 'health_check_port': '8124', 'target_health': {'state': 'healthy'}}]}) => {
"msg": [
{
"health_check_port": "8124",
"target": {
"id": "i-0b9b6e5a2775bXXXX",
"port": 8124
},
"target_health": {
"state": "UNhealthy"
}
},
{
"health_check_port": "8124",
"target": {
"id": "i-0feb307f8bdf6XXXX",
"port": 8124
},
"target_health": {
"state": "healthy"
}
}
]
}
I want to run this task until both "target_health:states" are healthy.
I wasn't able to do it, I was able to put the output to the file and then run a shell script that checks if the string "state": "healthy" is accruing more than once.
But then I realized the file is actually static and I write to it only once and only then I run the script in a loop which doesn't make any sense.
Is there a way for creating this query until I get the proper result I want without writing it to a file?

Answer 1

The retries:, delay:, and until: keywords will interest you
- name: Gather information about the target group attached to a particular LB
vars:
ansible_python_interpreter: /usr/bin/python3.6
register: target_health
community.aws.elb_target_group_info:
region: "{{AWS_REGION}}"
target_group_arns: "{{TARGET_GROUP_ARN}}"
collect_targets_health: yes
retries: 12
delay: 5
until: >-
{{ (target_health.target_groups[0].targets_health_description|length)
== target_health.target_groups[0].targets_health_description
| selectattr("target_health.state", "eq", "healthy") | list | length }}
delegate_to: 127.0.0.1
Alternatively, one could use awscli's wait, if you'd prefer to let awscli stall for you (it's not very ansible-y, but it makes for a ton less playbook log output as ansible retries)
- command: >-
aws --region {{ AWS_REGION }} elbv2 wait
target-in-service --target-group-arn {{ TARGET_GROUP_ARN | quote }}