Exporting and importing ASM/AWAF security policies with Ansible and Terraform
Problem this snippet solves:
This ansible playbook and Terraform TF file can be ised to copy the test ASM policy from the dev/preproduction environment to the production environment as this is Continuous integration and continuous delivery.
Ansible
You use the playbook by replacing the vars with "xxx" with your F5 device values for the connection. Also with the " vars_prompt:" you add policy name during execution as the preprod policy name is "{{ asm_policy }}_preprod" and the prod policy name is "{{ asm_policy }}_prod". For example if we enter "test" during the policy execution the name will be test_prod and test_preprod. If using Ansible Tower with the payed version you can use Jenkins or bamboo to push variables (I still have not tested this).
Also there is a task that deletes the old asm policy file saved on the server as I saw that the ansible modules have issues overwriting existing files when doing the export and the task name is "Ansible delete file example" and in the group "internal" I have added the localhost.
https://docs.ansible.com/ansible/latest/collections/f5networks/f5_modules/index.html
Also after importing the policy file the bug https://support.f5.com/csp/article/K25733314 is hit, so the last 2 tasks deactivate and and activate the production policy.
A nice example that I based my own is:
https://support.f5.com/csp/article/K42420223
You can also write the connections vars in the hosts file as per K42420223
vars:
provider:
password: "{{ bigip_password }}"
server: "{{ ansible_host }}"
user: "{{ bigip_username }}"
validate_certs: no
server_port: 443
Example hosts:
[bigip]
f5.com
[bigip:vars]
bigip_password=xxx
bigip_username=xxx
ansible_host=xxx
The policy is exported in binary format otherwize there is an issue importing it after that "binary: yes". Also when importing the option " force: yes" provides an overwrite if there is a policy with the same name.
See the comments for my example about using host groups with this way your dev environment can be on one F5 device and the exported policy from it will be imported on another F5 device that is for production. When not using ''all'' for hosts you need to use set_facts to only be propmpted once for the policy name and then this to be shared between plays.
Code :
---
- name: Exporting and importing the ASM policy
hosts: all
connection: local
become: yes
vars:
provider:
password: xxx
server: xxxx
user: xxxx
validate_certs: no
server_port: 443
vars_prompt:
- name: asm_policy
prompt: What is the name of the ASM policy?
private: no
tasks:
- name: Ansible delete file example
file:
path: "/home/niki/asm_policy/{{ asm_policy }}"
state: absent
when: inventory_hostname in groups['internal']
- name: Export policy in XML format
bigip_asm_policy_fetch:
name: "{{ asm_policy }}_preprod"
file: "{{ asm_policy }}"
dest: /home/niki/asm_policy/
binary: yes
provider: "{{ provider }}"
- name: Override existing ASM policy
bigip_asm_policy_import:
name: "{{ asm_policy }}_prod"
source: "/home/niki/asm_policy/{{ asm_policy }}"
force: yes
provider: "{{ provider }}"
notify:
- Save the running configuration to disk
- name: Task - deactivate policy
bigip_asm_policy_manage:
name: "{{ asm_policy }}_prod"
state: present
provider: "{{ provider }}"
active: no
- name: Task - activate policy
bigip_asm_policy_manage:
name: "{{ asm_policy }}_prod"
state: present
provider: "{{ provider }}"
active: yes
handlers:
- name: Save the running configuration to disk
bigip_config:
save: yes
provider: "{{ provider }}"
Tested this on version:
13.1
Edit:
--------------
When I made this code there was no official documentation but now I see F5 has provided examples for exporting and importing ASM/AWAF policies and even APM policies:
--------------
Terraform
Nowadays Terraform also provides the option to export and import AWAF policies (for APM Ansible is still the only way) as there is an F5 provider for terraform. I used Visual Studio as Visual Studio wil even open for you the teminal, where you can select the folder where the terraform code will be saved after you have added the code run terraform init, terraform plan, terraform apply. VS even has a plugin for writting F5 irules.
The terraform data type is not a resource and it is used to get the existing policy data. Data sources allow Terraform to use information defined outside of Terraform, defined by another separate Terraform configuration, or modified by functions.
Usefull links for Visual Studio and Terraform:
https://registry.terraform.io/providers/F5Networks/bigip/1.16.0/docs/resources/bigip_ltm_datagroup
Usefull links for Visual Studio and Terraform:
https://www.youtube.com/watch?v=Z5xG8HLwIh4
The big issue is that Terraform not like Ansible needs you first find the aWAF policy "ID" that is not the name but a random generated identifier and this is no small task. I suggest looking at the link below:
Code:
You may need to add also this resource below as to save the config and with "depends_on" it wil run after the date group is created. This is like the handler in Ansible that is started after the task is done and also terraform sometimes creates resources at the same time not like Ansible task after task,
Tested this on version:
16.1
