berthevin
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EX374V22K exam | how to find inline help

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Hello,

I'm about to take the EX374V22K exam in a few days.

I took the DO374 online course.

If I had been able to ask a few questions to the instructor in a real class environment, most of them would have been related to the help I would find inline during the exam.

- regarding the filters : how do I find help in case, for instance, I forget which are the possible parameters of 'passwd_hash' filter. I noticed the "ansible-doc" or "ansible-navigator doc" don't manage the filters section ;

- what if I don't remember exactly the syntax of a "requirements.yml" file for a collection dependency ;

- is there a skeleton I can get for the "execution-environment.yml" configuration file ?

Lastly, looking at the blueprint of the exam, I noticed the following objective and I wondered what kind of task(s) would be asked to perform in order to validate it :

"Create a dynamic inventory from an identity management server or a database server".

Many thanks in advance for your help.

Kind regards,

Berthevin

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ipalagin
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Filters section.  First, get all available types:

$ ansible-doc -t -l

usage: ansible-doc [-h] [--version] [-v] [-M MODULE_PATH] [--playbook-dir BASEDIR]
[-t {become,cache,callback,cliconf,connection,httpapi,inventory,lookup,netconf,shell,vars,module,strategy,test,filter,role,keyword}] [-j]

See if the filter you need is there:

$ ansible-doc -t filter -l | grep passw
ansible.builtin.password_hash convert input password into password_h...

Filter documentation:

$ ansible-doc -t filter ansible.builtin.password_hash

---

Another method for the core filters is viewing the Python files:

$ find /usr -name filter | grep ansible

Directory: /usr/lib/python3.9/site-packages/ansible/plugins/filter

File you want: password_hash.yml

---

BTW, this list of filters you can use in playbooks is not complete, the non-core ones come with jinja2 package:

$ find /usr | grep jinja | grep filter

The one you need:

/usr/lib/python3.9/site-packages/jinja2/filters.py

This Python file has comments inside, so one can find required filter without checking Ansible on-line docs or PDFs.

 

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ipalagin
Flight Engineer Flight Engineer
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For the requirements, this is how to find examples:

$ find /usr/share/ansible -name requirements.yml
/usr/share/ansible/collections/ansible_collections/redhat/rhel_system_roles/tests/sshd/requirements.yml
/usr/share/ansible/collections/ansible_collections/ibm/power_aix/collections/requirements.yml
/usr/share/ansible/collections/ansible_collections/ansible/posix/tests/requirements.yml
/usr/share/ansible/roles/rhel-system-roles.sshd/tests/requirements.yml

At least one of these collections needs to be installed, of course.  There is one which must be available in the repository: rhel-system-roles

So if "find" command finds nothing, it won't hurt to do "sudo dnf install rhel-system-roles" on the controller host.

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ipalagin
Flight Engineer Flight Engineer
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Filters section.  First, get all available types:

$ ansible-doc -t -l

usage: ansible-doc [-h] [--version] [-v] [-M MODULE_PATH] [--playbook-dir BASEDIR]
[-t {become,cache,callback,cliconf,connection,httpapi,inventory,lookup,netconf,shell,vars,module,strategy,test,filter,role,keyword}] [-j]

See if the filter you need is there:

$ ansible-doc -t filter -l | grep passw
ansible.builtin.password_hash convert input password into password_h...

Filter documentation:

$ ansible-doc -t filter ansible.builtin.password_hash

---

Another method for the core filters is viewing the Python files:

$ find /usr -name filter | grep ansible

Directory: /usr/lib/python3.9/site-packages/ansible/plugins/filter

File you want: password_hash.yml

---

BTW, this list of filters you can use in playbooks is not complete, the non-core ones come with jinja2 package:

$ find /usr | grep jinja | grep filter

The one you need:

/usr/lib/python3.9/site-packages/jinja2/filters.py

This Python file has comments inside, so one can find required filter without checking Ansible on-line docs or PDFs.

 

ipalagin
Flight Engineer Flight Engineer
Flight Engineer
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execution-environment.yml skeleton

$ rpm -ql ansible-navigator | grep template

/usr/lib/python3.9/site-packages/ansible_navigator/data/settings-sample.template.yml

 

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ipalagin
Flight Engineer Flight Engineer
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Regarding the dynamic inventories - in the labs, they provide scripts.  So it's probably about using a pre-coded script.

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berthevin
Cadet
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Hello ipalagin,

Many thanks for your answers. It helped me (I passed the exam today).

Kind regards,

Berthevin

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