跟踪/调试 ansible-playbook 变量解析

Question

ansible-playbook 有一个相当复杂的变量优先级层次结构。 在一种情况下，我无法确定变量值是从哪里解析的。 我期望它来自 group_vars 但事实并非如此。

有没有一种简单的方法来打印变量值的来源？

希望有这样的事情： max_mem：角色/app/defaults/main.yml

Answer 1

您可以尝试使用aiansible进行调试：https://github.com/sunnycloudy/aiansible

DEBUG INFO:
/root/.nujnus/test_suite/K8s_v2_22_2/install_k8s_v2_22_2/install/kubespray/roles/kubespray-defaults/tasks/main.yaml:2


    2|- name: Configure defaults
    3|  debug:
    4|    msg: "Check roles/kubespray-defaults/defaults/main.yml"
    5|  tags:
    6|    - always
    7|
    8|# do not run gather facts when bootstrap-os in roles
    9|- name: set fallback_ips
   10|  import_tasks: fallback_ips.yml
   11|  when:


Saturday 25 May 2024  23:07:13 +0800 (0:00:00.101)       10:20:04.700 ********* 

TASK [kubespray-defaults : Configure defaults] *****************************************************************************************************************************************************************
ok: [test1] => {
    "msg": "Check roles/kubespray-defaults/defaults/main.yml"
}
Aiansible(CN) => result._result
{'msg': 'Check roles/kubespray-defaults/defaults/main.yml', '_ansible_verbose_always': True, '_ansible_no_log': False, 'changed': False}
Aiansible(CN) => bt
0:/root/.nujnus/test_suite/K8s_v2_22_2/install_k8s_v2_22_2/install/kubespray/playbooks/ansible_version.yml:11=>Check 2.11.0 <= Ansible version < 2.13.0
1:/root/.nujnus/test_suite/K8s_v2_22_2/install_k8s_v2_22_2/install/kubespray/playbooks/ansible_version.yml:20=>Check that python netaddr is installed
2:/root/.nujnus/test_suite/K8s_v2_22_2/install_k8s_v2_22_2/install/kubespray/playbooks/ansible_version.yml:28=>Check that jinja is not too old (install via pip)
3:/root/.nujnus/test_suite/K8s_v2_22_2/install_k8s_v2_22_2/install/kubespray/roles/download/tasks/prep_download.yml:2=>download : prep_download | Set a few facts
4:/root/.nujnus/test_suite/K8s_v2_22_2/install_k8s_v2_22_2/install/kubespray/roles/download/tasks/prep_download.yml:8=>download : prep_download | On localhost, check if passwordless root is possible
5:/root/.nujnus/test_suite/K8s_v2_22_2/install_k8s_v2_22_2/install/kubespray/roles/download/tasks/prep_download.yml:23=>download : prep_download | On localhost, check if user has access to the container runtime without using sudo
6:/root/.nujnus/test_suite/K8s_v2_22_2/install_k8s_v2_22_2/install/kubespray/roles/download/tasks/prep_download.yml:38=>download : prep_download | Parse the outputs of the previous commands
7:/root/.nujnus/test_suite/K8s_v2_22_2/install_k8s_v2_22_2/install/kubespray/roles/download/tasks/prep_download.yml:48=>download : prep_download | Check that local user is in group or can become root
8:/root/.nujnus/test_suite/K8s_v2_22_2/install_k8s_v2_22_2/install/kubespray/roles/download/tasks/prep_download.yml:59=>download : prep_download | Register docker images info
9:/root/.nujnus/test_suite/K8s_v2_22_2/install_k8s_v2_22_2/install/kubespray/roles/download/tasks/prep_download.yml:68=>download : prep_download | Create staging directory on remote node
10:/root/.nujnus/test_suite/K8s_v2_22_2/install_k8s_v2_22_2/install/kubespray/roles/download/tasks/prep_download.yml:78=>download : prep_download | Create local cache for files and images on control node
11:/root/.nujnus/test_suite/K8s_v2_22_2/install_k8s_v2_22_2/install/kubespray/roles/download/tasks/main.yml:10=>download : download | Get kubeadm binary and list of required images
12:/root/.nujnus/test_suite/K8s_v2_22_2/install_k8s_v2_22_2/install/kubespray/roles/download/tasks/main.yml:19=>download : download | Download files / images
13:/root/.nujnus/test_suite/K8s_v2_22_2/install_k8s_v2_22_2/install/kubespray/roles/kubespray-defaults/tasks/main.yaml:2=>kubespray-defaults : Configure defaults
Aiansible(CN) => a
msg: Check roles/kubespray-defaults/defaults/main.yml