I have this sample playbook and it work fine.
- hosts: localhost
gather_facts: true
tasks:
- name: Print network interface details
debug:
msg: "{{ ansible_ens2f0.ipv4.network }}/{{ ansible_ens2f0.ipv4.netmask }}"
If I try with VLAN tag (11)
- hosts: localhost
gather_facts: true
tasks:
- name: Print network interface details
debug:
msg: "{{ ansible_ens2f0.11.ipv4.network }}/{{ ansible_ens2f0.11.ipv4.netmask }}"
then getting error, in short
dict object has no element 11
and full message
TASK [Print network interface details] ***************************************************************************************************************************************************************************************************************************************
fatal: [localhost]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: dict object has no element 11\n\nThe error appears to have been in '/home/ubuntu/net.yml': line 4, column 7, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n tasks:\n - name: Print network interface details\n ^ here\n"}
How do I concatenate vlan_id in variable?
EDIT:
Here is dump of
ansible localhost -m setup
"ansible_ens2f0.11": {
"active": true,
"device": "ens2f0.11",
"features": {
"esp_hw_offload": "off [fixed]",
"esp_tx_csum_hw_offload": "off [fixed]",
"fcoe_mtu": "off [requested on]",
"generic_receive_offload": "on",
"generic_segmentation_offload": "on",
"highdma": "on",
"hw_tc_offload": "off [fixed]",
"l2_fwd_offload": "off [fixed]",
"large_receive_offload": "off [fixed]",
"loopback": "off [fixed]",
"netns_local": "off [fixed]",
"ntuple_filters": "off [fixed]",
"receive_hashing": "off [fixed]",
"rx_all": "off [fixed]",
"rx_checksumming": "off [fixed]",
"rx_fcs": "off [fixed]",
"rx_gro_hw": "off [fixed]",
"rx_udp_tunnel_port_offload": "off [fixed]",
"rx_vlan_filter": "off [fixed]",
"rx_vlan_offload": "off [fixed]",
"rx_vlan_stag_filter": "off [fixed]",
"rx_vlan_stag_hw_parse": "off [fixed]",
"scatter_gather": "on",
"tcp_segmentation_offload": "on",
"tls_hw_record": "off [fixed]",
"tls_hw_rx_offload": "off [fixed]",
"tls_hw_tx_offload": "off [fixed]",
"tx_checksum_fcoe_crc": "off [requested on]",
"tx_checksum_ip_generic": "on",
"tx_checksum_ipv4": "off [fixed]",
"tx_checksum_ipv6": "off [fixed]",
"tx_checksum_sctp": "off [requested on]",
"tx_checksumming": "on",
"tx_esp_segmentation": "off [fixed]",
"tx_fcoe_segmentation": "off [requested on]",
"tx_gre_csum_segmentation": "off [requested on]",
"tx_gre_segmentation": "off [requested on]",
"tx_gso_partial": "off [fixed]",
"tx_gso_robust": "off [fixed]",
"tx_ipxip4_segmentation": "off [requested on]",
"tx_ipxip6_segmentation": "off [requested on]",
"tx_lockless": "on [fixed]",
"tx_nocache_copy": "off",
"tx_scatter_gather": "on",
"tx_scatter_gather_fraglist": "off [requested on]",
"tx_sctp_segmentation": "on",
"tx_tcp6_segmentation": "on",
"tx_tcp_ecn_segmentation": "on",
"tx_tcp_mangleid_segmentation": "on",
"tx_tcp_segmentation": "on",
"tx_udp_segmentation": "off [fixed]",
"tx_udp_tnl_csum_segmentation": "on",
"tx_udp_tnl_segmentation": "on",
"tx_vlan_offload": "off [fixed]",
"tx_vlan_stag_hw_insert": "off [fixed]",
"udp_fragmentation_offload": "off",
"vlan_challenged": "off [fixed]"
},
"hw_timestamp_filters": [
"none",
"all"
],
"ipv4": {
"address": "10.43.56.241",
"broadcast": "10.43.56.255",
"netmask": "255.255.255.224",
"network": "10.43.56.224"
},
I want to extract facts "network": "10.43.56.224" when I am trying ansible_ens2f0.11.ipv4.network because of dot between interface and vlan_id causing issue. it think its sub element but its not.
In order for further working with Ansible facts a minimal example playbook based on Ansible Issue #81652
---
- hosts: localhost
become: false
gather_facts: false
vars:
facts:
ens2f0.11: {
"active": true,
"device": "ens2f0",
"vlan_id": "11",
"macaddress": "00:00:5E:00:42:11",
"mtu": 1500,
"promisc": false,
"speed": 10000,
"type": "vlan"
}
VLAN_ID: 11
tasks:
- debug:
var: facts.ens2f0.11
will result into an output of
TASK [debug] ******************************
ok: [localhost] =>
facts.ens2f0.11: VARIABLE IS NOT DEFINED!
because in this case here the variable naming in Ansible facts given by setup.py is different from documentation Creating valid variable names.
Not all strings are valid Ansible variable names. A variable name can only include letters, numbers, and underscores. Python keywords or playbook keywords are not valid variable names. A variable name cannot begin with a number.
In order to access the variable and data one could use
- debug:
var: facts['ens2f0.11']
resulting into an output of
TASK [debug] ********************
ok: [localhost] =>
facts['ens2f0.11']:
active: true
device: ens2f0
macaddress: 00:00:5E:00:42:11
mtu: 1500
promisc: false
speed: 10000
type: vlan
vlan_id: '11'
Q: "How do I concatenate vlan_id in variable?"
A: Since the variable naming above is done in code and static, but the vlan_id probably dynamic, one will mostly like to construct the variable name dynamic and based on other variable content, in example an given VLAN_ID. In order to do so
- debug:
var: facts['ens2f0.' ~ VLAN_ID]
# Or even
- debug:
msg: "{{ facts['ens2f0.' ~ VLAN_ID] }}"
resulting into an output of
TASK [debug] ********************
ok: [localhost] =>
facts['ens2f0.' ~ VLAN_ID]:
active: true
device: ens2f0
macaddress: 00:00:5E:00:42:11
mtu: 1500
promisc: false
speed: 10000
type: vlan
vlan_id: '11'
See best practice to concatenate strings in Ansible variables and another more advanced example for your case
---
- hosts: localhost
become: false
gather_facts: false
vars:
DEVICE: ens2f0
VLAN_ID: 11
facts:
ansible_ens2f0.11: {
"active": true,
"device": "ens2f0.11",
"features": {
},
"hw_timestamp_filters": [
"none",
"all"
],
"ipv4": {
"address": "10.43.56.241",
"broadcast": "10.43.56.255",
"netmask": "255.255.255.224",
"network": "10.43.56.224"
}
}
tasks:
- debug:
msg: "{{ facts['ansible_' ~ DEVICE ~ '.' ~ VLAN_ID].ipv4.network }}"```
resulting into the requested output of
TASK [debug] ******
ok: [localhost] =>
msg: 10.43.56.224
Finally proceed further and test directly with gathered ansible_facts
---
- hosts: localhost
gather_facts: true
vars:
DEVICE: ens2f0
VLAN_ID: 11
tasks:
- debug:
msg: "{{ ansible_facts[DEVICE ~ '.' ~ VLAN_ID].ipv4.network }}"```