In order to get the value "24" corresponding to an IP address/networkmask, I have this working piece of code:
- set_fact:
ip: "{{ ansible_default_ipv4.address }}/{{ansible_default_ipv4.netmask }}"
- set_fact:
mask_cidr: "{{ ip | ipaddr('prefix') }}"
Where ansible_default_ipv4.address = 172.16.1.67 and ansible_default_ipv4.netmask is 255.255.255.0 as per gather_facts or setup module.
I've tried different things to make this code "smarter" so I only need to set 1 fact instead of 2, but my filtering abilities are not strong.
Any ideas in how to convert these two facts in a smarter fact that do both things?
Easiest and the most clean way is through a helper variable:
- set_fact:
mask_cidr: "{{ ip | ipaddr('prefix') }}"
vars:
ip: "{{ ansible_default_ipv4.address }}/{{ansible_default_ipv4.netmask }}"
If you insist on writing a single template:
- sef_fact:
ip: "{{ (ansible_default_ipv4.address + '/' + ansible_default_ipv4.netmask) | ipaddr('prefix') }}"
I'm using this:
mynetwork = {{ (ansible_default_ipv4.network + '/' + ansible_default_ipv4.netmask) | ipaddr('network/prefix') }}
Related
I am setting fact as dict using host names like below,
set_fact:
processed_hosts: "{{ processed_hosts | default([]) + [dict(host_name=item, result=hostvars[item]['_OS_upgraded'])] }}"
with_items:
- "{{ groups['reachable_a_hosts'] }}"
Its working good when all the host has "_OS_upgraded".
But when task failed in any of the host then "_OS_upgraded" is not set, on that scenario i am getting error when i call this hostvars[item]['_OS_upgraded']
so want to set it false by default if that item is not in hostvars,
Can some one let me know how to do that?
It worked after adding | default(False)
set_fact:
processed_hosts: "{{ processed_hosts | default([]) + [dict(host_name=item, result=hostvars[item]['_OS_upgraded']|default(False))] }}"
with_items:
- "{{ groups['reachable_a_hosts'] }}"
I am 90% sure this doesn't work because i'm doing it the wrong way, but i can't figure out what is the "right way",I hope you can get my point :
I am trying to access an ipv4 of a certain interface,I have in my hosts file interface_lan = enp4s0 because i need it in a role,so i thought i might just use it to have the IP address of that interface :
"{{hostvars[inventory_hostname]['ansible_{{interface_lan}']['ipv4.address']}}"
with that command,he is looking for "ansible_{{interface_lan}}" but i want him to look for
"ansible_"{{interface_lan}}"" and to consider "{{interface_lan}}" as a variable,not as a string.
I tried my best to explain,sorry if you did not understand you are free to enjoy the rest of your day without helping me, i have been ignoring this line for a few days now.
thank you !
Concatenate the name of the attribute an use it in the index. For example
- hosts: localhost
gather_facts: false
vars:
interface_lan: enp4s0
ansible_enp4s0:
ipv4:
address: 10.1.0.10
tasks:
- set_fact:
ansible_enp4s0: "{{ ansible_enp4s0 }}"
- debug:
msg: "{{ hostvars[inventory_hostname][my_ifc]['ipv4']['address'] }}"
vars:
my_ifc: "{{ 'ansible_' ~ interface_lan }}"
gives (abridged)
msg: 10.1.0.10
Note: set_fact is needed in the example to put the dictionary ansible_enp4s0 into the hostvars.
The indirect addressing of variables without hostvars is possible with the lookup plugin vars. For example
- hosts: localhost
vars:
test_eth0: 10.1.0.10
test_eth1: 10.1.0.11
tasks:
- debug:
msg: "{{ item }}: {{ lookup('vars', 'test_' ~ item ) }}"
loop:
- eth0
- eth1
gives (abridged)
msg: 'eth0: 10.1.0.10'
msg: 'eth1: 10.1.0.11'
I have a few variables defined for every host. Like...
hosts:
- hostA:
vars:
self_ip: "192.168.1.10"
self_port: "8001"
- hostB:
vars:
self_ip: "192.168.1.11"
self_port: "8002"
Inside one of the roles, I want to define a variable, which is a combination of few host variables. For example...
all_endpoints: 192.168.1.10:8001,192.168.1.11:8002
How can I do this?
I tried using Jinja2 for loops like below:
rs_members:
"{% for host in groups['all_hosts'] %}
- {{hostvars[host]['self_ip']}}:{{hostvars[host]['self_port']}}
{% endfor %}"
This seems to be creating a string. Not a list.
Can someone tell me what is wrong? And is there a way to use ansible filters to achieve this?
- set_fact:
all_endpoints: "{{ hosts|json_query('[].vars.[self_ip, self_port]') }}"
- set_fact:
touples: "{{ touples|default([]) + [ item.0 + ':' + item.1 ] }}"
loop: "{{ all_endpoints }}"
- debug:
var: touples
gives
"touples": [
"192.168.1.10:8001",
"192.168.1.11:8002"
]
I would like to omit the dns_nameservers variable from the following Openstack function if the value does not appear in the variable file:
os_subnet:
cloud: "{{ item.cloud }}"
state: present
validate_certs: no
no_gateway_ip: yes
dns_nameservers:
- "{{ item.dns | default(None) }}"
enable_dhcp: yes
name: "{{ item.subnet }}"
network_name: "{{ item.network }}"
cidr: "{{ item.cidr }}"
allocation_pool_start: "{{ item.allocation_pool_start }}"
allocation_pool_end: "{{ item.allocation_pool_end }}"
host_routes: "{{ item.host_routes | default(omit) }}"
with_items:
- "{{ subnets }}"
tags: subnets
Until now, I have tried to omit it with | default(omit) and | default(None), but it is not working. Is any filter that might help or any other way?
EDIT:
Variable file:
- cloud: tenant1
network: nw
subnet: nw_subnet
cidr: 172.12.17.64/26
dns:
- 8.8.8.8
- 8.8.8.9
allocation_pool_start: 172.12.17.68
allocation_pool_end: 172.12.17.70
host_routes:
- destination: 0.0.0.0/0
nexthop: 172.12.17.65
I am getting the following error:
Reason: '[u'8.8.8.8', u'8.8.8.9']' is not a valid
nameserver. '[u'8.8.8.8', u'8.8.8.9']' is not a valid
IP address.\", \"type\": \"HTTPBadRequest\", \"detail\": \"\"}}"}
You want to either pass a list with a single element or pass an omit keyword (placeholder object), which tells Ansible not to pass the whole parameter (dns_nameservers here) to the module:
dns_nameservers: "{{ [item.dns] if item.dns is defined else omit }}"
In your example, if item.dns was undefined, you passed a list with a single element being an omit placeholder. In such case the dns_nameservers parameter is defined (that list which is hardcoded in the code) and behaviour is undefined (likely depends on module).
Having a dictionary like this:
ossec_datacenter:
atlanta:
hostname: 'server1.fakedomain.net'
ip: '192.168.12.170'
port: '1515'
miami:
hostname: 'server2.fakedomain.net'
ip: '192.168.20.31'
port: '1514'
dallas:
hostname: 'server2.fakedomain.net'
ip: '192.168.20.20'
port: '1515'
How would I search for all values in this dictionary in my when clause?
I can access variables using ossec_datacenter[ossec_dc]['hostname']
But I want so search all values to make sure no matches are present.
In other words I don't want the inventory_hostname nor the IP to be found anywhere in that data structure.
If you want to use json_query (requires ansible 2.2) you can do this to search ip and hostname:
- name: find inventory_hostname
set_fact:
found: True
with_items:
- "{{ ossec_datacenter | json_query('*.ip') }}"
- "{{ ossec_datacenter | json_query('*.hostname') }}"
when: "inventory_hostname == item"
or if you want to search any of the keys in the datacenters (ip, hostname, or port):
- name: find inventory_hostname
set_fact:
found: True
with_items: "{{ ossec_datacenter | json_query('*.*') }}"
when: "inventory_hostname == item"
and then test the found var.
Here's a condition for hostname:
when: inventory_hostname not in (ossec_datacenter.values() | map(attribute='hostname') | list)
Use ansible_default_ipv4.address or some other fact about IP address and reduce your dict with map(attribute='ip') to search for IP addresses.