How to print specific content over a loop in Ansible - networking

Question

I'm a bit stuck with Ansible trying to print some variables from a return of F5.
I'm trying to print which nodes are configured in a determinated pool. I can get all the result:
TASK [f5_getpoolmembers : Ver IPs de un pool] ***********************************************************************************
ok: [localhost] => (item=[u'pool_createdby_ansible_f5']) =>
msg:
- pool_createdby_ansible_f5
- - address: 10.10.10.34
connection_limit: 0
description: prova_ansible_pool
dynamic_ratio: 1
ephemeral: 'no'
fqdn_autopopulate: 'yes'
full_path: /Common/10.10.10.34:80
inherit_profile: 'yes'
logging: 'no'
monitors: []
name: 10.10.10.34:80
partition: Common
priority_group: 0
rate_limit: 'no'
ratio: 1
real_session: user-enabled
real_state: unchecked
state: present
- address: 10.100.250.5
connection_limit: 0
dynamic_ratio: 1
ephemeral: 'no'
fqdn_autopopulate: 'no'
full_path: /Common/10.100.250.5:80
inherit_profile: 'yes'
logging: 'no'
monitors: []
name: 10.100.250.5:80
partition: Common
priority_group: 0
rate_limit: 'no'
ratio: 1
real_session: user-enabled
real_state: unchecked
state: present
with that code:
- name: "Ver IPs de un pool"
debug:
msg:
- "{{item.name}}"
- "{{item.members}}"
loop: "{{pool_facts.ltm_pools}}"
loop_control:
label:
- "{{item.name}}"
when: item.name is search "ansible"
The problem is when I try to print only the name for every node in the pool. I can't find the way to do it. Tried many options like nested or subelements, but didn't work. If i try to print only the name, I just get the first node:
TASK [f5_getpoolmembers : Ver IPs de un pool] ***********************************************************************************
ok: [localhost] => (item=[u'pool_createdby_ansible_f5']) =>
msg:
- pool_createdby_ansible_f5
- 10.10.10.34:80
Doing this:
- name: "Ver IPs de un pool"
debug:
msg:
- "{{item.name}}"
- "{{item.members[0].name}}"
I know that it's wrong, so that's why I'm here to get some advices.
Edit: Added the complete structure of the pool:
ltm_pools:
- active_member_count: 0
all_avg_queue_entry_age: 0
all_max_queue_entry_age_ever: 0
all_max_queue_entry_age_recently: 0
all_num_connections_queued_now: 0
all_num_connections_serviced: 0
all_queue_head_entry_age: 0
allow_nat: 'yes'
allow_snat: 'yes'
availability_status: unknown
available_member_count: 3
client_ip_tos: pass-through
client_link_qos: pass-through
current_sessions: 0
enabled_status: enabled
full_path: /Common/pool_createdby_ansible_f5
ignore_persisted_weight: 'no'
lb_method: ratio-member
member_count: 3
members:
- address: 10.10.10.34
connection_limit: 0
description: prova_ansible_pool
dynamic_ratio: 1
ephemeral: 'no'
fqdn_autopopulate: 'yes'
full_path: /Common/10.10.10.34:80
inherit_profile: 'yes'
logging: 'no'
monitors: []
name: 10.10.10.34:80
partition: Common
priority_group: 0
rate_limit: 'no'
ratio: 1
real_session: user-enabled
real_state: unchecked
state: present
- address: 10.100.250.5
connection_limit: 0
dynamic_ratio: 1
ephemeral: 'no'
fqdn_autopopulate: 'no'
full_path: /Common/10.100.250.5:80
inherit_profile: 'yes'
logging: 'no'
monitors: []
name: 10.100.250.5:80
partition: Common
priority_group: 0
rate_limit: 'no'
ratio: 1
real_session: user-enabled
real_state: unchecked
state: present
- address: 10.55.55.4
connection_limit: 0
dynamic_ratio: 1
ephemeral: 'no'
fqdn_autopopulate: 'no'
full_path: /Common/10.55.55.4:80
inherit_profile: 'yes'
logging: 'no'
monitors: []
name: 10.55.55.4:80
partition: Common
priority_group: 0
rate_limit: 'no'
ratio: 1
real_session: user-enabled
real_state: unchecked
state: present
minimum_active_members: 0
minimum_up_members: 0
minimum_up_members_action: failover
minimum_up_members_checking: 'no'
name: pool_createdby_ansible_f5
pool_avg_queue_entry_age: 0
pool_max_queue_entry_age_ever: 0
pool_max_queue_entry_age_recently: 0
pool_num_connections_queued_now: 0
pool_num_connections_serviced: 0
pool_queue_head_entry_age: 0
priority_group_activation: 0
queue_depth_limit: 0
queue_on_connection_limit: 'no'
queue_time_limit: 0
reselect_tries: 0
server_ip_tos: pass-through
server_link_qos: pass-through
server_side_bits_in: 0
server_side_bits_out: 0
server_side_current_connections: 0
server_side_max_connections: 0
server_side_pkts_in: 0
server_side_pkts_out: 0
server_side_total_connections: 0
service_down_action: none
slow_ramp_time: 10
status_reason: The children pool member(s) either don't have service checking enabled, or service check results are not available yet
total_requests: 0

Answer 1

You will have to use subelements, indeed.
When you are using the subelements('dictionary_key') filter, then you end up with:
item.0: an item from the list of your loop
item.1: an item from the nested list inside dictionary_key of each item.0 item
Given the playbook:
- hosts: all
gather_facts: no
tasks:
- debug:
msg:
- "{{ item.0.name }}"
- "{{ item.1.name }}"
loop_control:
label:
- "{{ item.0.name }}"
loop: "{{ pools_facts.ltm_pools | subelements('members') }}"
when: "'ansible' in item.0.name"
vars:
pools_facts:
ltm_pools:
- active_member_count: 0
all_avg_queue_entry_age: 0
all_max_queue_entry_age_ever: 0
all_max_queue_entry_age_recently: 0
all_num_connections_queued_now: 0
all_num_connections_serviced: 0
all_queue_head_entry_age: 0
allow_nat: 'yes'
allow_snat: 'yes'
availability_status: unknown
available_member_count: 3
client_ip_tos: pass-through
client_link_qos: pass-through
current_sessions: 0
enabled_status: enabled
full_path: /Common/pool_createdby_ansible_f5
ignore_persisted_weight: 'no'
lb_method: ratio-member
member_count: 3
members:
- address: 10.10.10.34
connection_limit: 0
description: prova_ansible_pool
dynamic_ratio: 1
ephemeral: 'no'
fqdn_autopopulate: 'yes'
full_path: /Common/10.10.10.34:80
inherit_profile: 'yes'
logging: 'no'
monitors: []
name: 10.10.10.34:80
partition: Common
priority_group: 0
rate_limit: 'no'
ratio: 1
real_session: user-enabled
real_state: unchecked
state: present
- address: 10.100.250.5
connection_limit: 0
dynamic_ratio: 1
ephemeral: 'no'
fqdn_autopopulate: 'no'
full_path: /Common/10.100.250.5:80
inherit_profile: 'yes'
logging: 'no'
monitors: []
name: 10.100.250.5:80
partition: Common
priority_group: 0
rate_limit: 'no'
ratio: 1
real_session: user-enabled
real_state: unchecked
state: present
- address: 10.55.55.4
connection_limit: 0
dynamic_ratio: 1
ephemeral: 'no'
fqdn_autopopulate: 'no'
full_path: /Common/10.55.55.4:80
inherit_profile: 'yes'
logging: 'no'
monitors: []
name: 10.55.55.4:80
partition: Common
priority_group: 0
rate_limit: 'no'
ratio: 1
real_session: user-enabled
real_state: unchecked
state: present
minimum_active_members: 0
minimum_up_members: 0
minimum_up_members_action: failover
minimum_up_members_checking: 'no'
name: pool_createdby_ansible_f5
pool_avg_queue_entry_age: 0
pool_max_queue_entry_age_ever: 0
pool_max_queue_entry_age_recently: 0
pool_num_connections_queued_now: 0
pool_num_connections_serviced: 0
pool_queue_head_entry_age: 0
priority_group_activation: 0
queue_depth_limit: 0
queue_on_connection_limit: 'no'
queue_time_limit: 0
reselect_tries: 0
server_ip_tos: pass-through
server_link_qos: pass-through
server_side_bits_in: 0
server_side_bits_out: 0
server_side_current_connections: 0
server_side_max_connections: 0
server_side_pkts_in: 0
server_side_pkts_out: 0
server_side_total_connections: 0
service_down_action: none
slow_ramp_time: 10
status_reason: The children pool member(s) either don't have service checking enabled, or service check results are not available yet
total_requests: 0
This gives the output:
PLAY [all] *********************************************************************************************************
TASK [debug] *******************************************************************************************************
ok: [localhost] => (item=['pool_createdby_ansible_f5']) => {
"msg": [
"pool_createdby_ansible_f5",
"10.10.10.34:80"
]
}
ok: [localhost] => (item=['pool_createdby_ansible_f5']) => {
"msg": [
"pool_createdby_ansible_f5",
"10.100.250.5:80"
]
}
ok: [localhost] => (item=['pool_createdby_ansible_f5']) => {
"msg": [
"pool_createdby_ansible_f5",
"10.55.55.4:80"
]
}
PLAY RECAP *********************************************************************************************************
localhost : ok=1 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0

Answer 2

I have built a successful playbook. I chose to list more options than names of the members though. You could modify this to spit out just their names. As a note my playbokk has the variable poolName for a survey. Here is my playbook:
- hosts: localhost
tasks:
- name: collect device info
bigip_device_info:
gather_subset:
- ltm-pools
delegate_to: localhost
register: f5pools
- name: Display Config for a specific pool using a variable
debug:
var: item
loop: "{{ f5pools | json_query(pool_name) }}"
vars:
pool_name: "ltm_pools[?name=='{{ poolName }}'].{name: name, Method: lb_method, Members: members[*].{name: name, state:real_state }, Monitors: monitors}"
You could modify it for just the names using:
- hosts: localhost
tasks:
- name: collect device info
bigip_device_info:
gather_subset:
- ltm-pools
delegate_to: localhost
register: f5pools
- name: Display Config for a specific pool using a variable
debug:
var: item
loop: "{{ f5pools | json_query(pool_name) }}"
vars:
pool_name: "ltm_pools[?name=='{{ poolName }}'].members[*].name"
Which worked see output:
{
"ansible_loop_var": "item",
"_ansible_no_log": false,
"item": [
"1.1.1.2:443",
"1.1.1.3:443"
],
"changed": false,
"_ansible_verbose_always": true,
"_ansible_item_label": [
"1.1.1.2:443",
"1.1.1.3:443"
]
}