Undefined variable, The error was: 'dict object'

[purencool]

Hi,

Great work firstly, I don't know is this a bug or I am not following your howto properly(which is more likely). So I have created this ticket to see which one it is. I have Two PI's 4, 2gig with a Debian installation.

Testing your configuration it works fine:

ansible all -i inventory -m ping
[WARNING]: Platform linux on host 192.168.20.17 is using the discovered Python interpreter at /usr/bin/python, but future installation of
another Python interpreter could change this. See https://docs.ansible.com/ansible/2.9/reference_appendices/interpreter_discovery.html for more
information.

192.168.20.17 | SUCCESS => {
    "ansible_facts": {
        "discovered_interpreter_python": "/usr/bin/python"
    },
    "changed": false,
    "ping": "pong"
}
[WARNING]: Platform linux on host 192.168.20.18 is using the discovered Python interpreter at /usr/bin/python, but future installation of
another Python interpreter could change this. See https://docs.ansible.com/ansible/2.9/reference_appendices/interpreter_discovery.html for more
information.

192.168.20.18 | SUCCESS => {
    "ansible_facts": {
        "discovered_interpreter_python": "/usr/bin/python"
    },
    "changed": false,
    "ping": "pong"
}
Sitecore:networking john.cullen$  ansible all -i inventory -a "df -h"
[WARNING]: Platform linux on host 192.168.20.18 is using the discovered Python interpreter at /usr/bin/python, but future installation of
another Python interpreter could change this. See https://docs.ansible.com/ansible/2.9/reference_appendices/interpreter_discovery.html for more
information.

192.168.20.18 | CHANGED | rc=0 >>
Filesystem      Size  Used Avail Use% Mounted on
/dev/root        29G  1.3G   27G   5% /
devtmpfs        841M     0  841M   0% /dev
tmpfs           970M     0  970M   0% /dev/shm
tmpfs           970M  8.4M  962M   1% /run
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           970M     0  970M   0% /sys/fs/cgroup
/dev/mmcblk0p1  253M   52M  201M  21% /boot
tmpfs           194M     0  194M   0% /run/user/1000

[WARNING]: Platform linux on host 192.168.20.17 is using the discovered Python interpreter at /usr/bin/python, but future installation of
another Python interpreter could change this. See https://docs.ansible.com/ansible/2.9/reference_appendices/interpreter_discovery.html for more
information.

192.168.20.17 | CHANGED | rc=0 >>
Filesystem      Size  Used Avail Use% Mounted on
/dev/root        29G  1.3G   27G   5% /
devtmpfs        841M     0  841M   0% /dev
tmpfs           970M     0  970M   0% /dev/shm
tmpfs           970M  8.5M  962M   1% /run
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           970M     0  970M   0% /sys/fs/cgroup
/dev/mmcblk0p1  253M   52M  201M  21% /boot
tmpfs           194M     0  194M   0% /run/user/1000

ansible all -i inventory -a "free -m"
[WARNING]: Platform linux on host 192.168.20.17 is using the discovered Python interpreter at /usr/bin/python, but future installation of
another Python interpreter could change this. See https://docs.ansible.com/ansible/2.9/reference_appendices/interpreter_discovery.html for more
information.

192.168.20.17 | CHANGED | rc=0 >>
              total        used        free      shared  buff/cache   available
Mem:           1939          70        1782           8          86        1784
Swap:            99           0          99

[WARNING]: Platform linux on host 192.168.20.18 is using the discovered Python interpreter at /usr/bin/python, but future installation of
another Python interpreter could change this. See https://docs.ansible.com/ansible/2.9/reference_appendices/interpreter_discovery.html for more
information.

192.168.20.18 | CHANGED | rc=0 >>
              total        used        free      shared  buff/cache   available
Mem:           1939          61        1749           8         128        1791

Then I navigate to the following directory raspberry-pi-dramble/setup/networking

and set up my variables in vars.yml

---
# Mapping of what hardware MAC addresses should be configured with specific IPs.
mac_address_mapping:
  "macaddressofmachine":
    name: k1.purencool.net
    ip: "192.168.20.45"
  "macaddressofmachine":
    name: k2.purencool.net
    ip: "192.168.20.46"

# Nameservers to use in resolv.conf.
dns_nameservers:
  - "8.8.8.8"
  - "8.8.4.4"

My inventory file looks like this

[dramble]
192.168.20.17
192.168.20.18

[dramble:vars]
ansible_ssh_user=pi

When I try the following command ansible-playbook -i inventory main.yml. I get the following output

PLAY [dramble] **********************************************************************************************************************************

TASK [Gathering Facts] **************************************************************************************************************************
ok: [192.168.20.18]
ok: [192.168.20.17]

TASK [Set the current MAC address for eth0.] ****************************************************************************************************
ok: [192.168.20.17]
ok: [192.168.20.18]

TASK [Set variables based on eth0 MAC address.] *************************************************************************************************
fatal: [192.168.20.17]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'dict object' has no attribute 'mac-address-i-have-removed'\n\nThe error appears to be in '/path-I-have-removed/raspberry-pi-dramble/setup/networking/main.yml': line 13, column 7, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n    - name: Set variables based on eth0 MAC address.\n      ^ here\n"}
fatal: [192.168.20.18]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'dict object' has no attribute 'mac-address-i-have-removed'\n\nThe error appears to be in '/path-I-have-removed/raspberry-pi-dramble/setup/networking/main.yml': line 13, column 7, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n    - name: Set variables based on eth0 MAC address.\n      ^ here\n"}

PLAY RECAP **************************************************************************************************************************************
192.168.20.17              : ok=2    changed=0    unreachable=0    failed=1    skipped=0    rescued=0    ignored=0   
192.168.20.18              : ok=2    changed=0    unreachable=0    failed=1    skipped=0    rescued=0    ignored=0  

This is line 13 - name: Set variables based on eth0 MAC address.

This is the main.yml

---
- hosts: dramble
  become: yes

  vars_files:
    - vars.yml

  tasks:
    - name: Set the current MAC address for eth0.
      set_fact:
        dramble_mac_address: "{{ hostvars[inventory_hostname].ansible_default_ipv4.macaddress }}"

    - name: Set variables based on eth0 MAC address.
      set_fact:
        dramble_hostname: "{{ mac_address_mapping[dramble_mac_address].name }}"
        dramble_ip_address: "{{ mac_address_mapping[dramble_mac_address].ip }}"

    - name: Set up networking-related files.
      template:
        src: "templates/{{ item.template }}"
        dest: "{{ item.dest }}"
        mode: 0644
      with_items:
        - { template: hostname.j2, dest: /etc/hostname }
        - { template: hosts.j2, dest: /etc/hosts }
        - { template: resolv.conf.j2, dest: /etc/resolv.conf }
        - { template: dhcpcd.conf.j2, dest: /etc/dhcpcd.conf }
      notify:
        - update hostname
        - delete dhcp leases

  handlers:
    - name: update hostname
      command: "hostname {{ dramble_hostname }}"

    - name: delete dhcp leases
      file:
        path: /var/lib/dhcp/dhclient.leases
        state: absent
      with_items:
        - /var/lib/dhcp/dhclient.leases
        - /var/lib/dhcpcd5/dhcpcd-eth0.lease

My question is: I am not sure what it is that creating the error are you able to see what it is?

[amajot]

@purencool I had this same error, the issue was that the characters in my MAC addresses were uppercase (copy/pasted from my router). Ansible is expecting lowercase. If you look at the error message it shows the MAC as lowercase, which is the clue for what the problem is

[purencool]

@amajot, yes that was the issue, the MAC addresses needed to be lowercase in this circumstance. Thanks for the information.

[geerlingguy]

Thanks for posting the fix!