Ansible

General 3 questions

#1
Ansible - My First Playbook
1. Write a playbook that will: a. Install the package zlib b. Create the file /tmp/some_file
2. Run the playbook on a remote host
#2
Ansible - My First Task
1. Write a task to create the directory ‘/tmp/new_directory’
#3
Ansible - Update and upgrade APT packages task
1. Write a task to update and upgrade apt packages

Ansible Self Assessment 48 questions

#4
Describe each of the following components in Ansible, including the relationship between them:
- Task
  - Inventory
  - Module
  - Play
  - Playbook
  - Role
#5
How Ansible is different from other automation tools? (e.g. Chef, Puppet, etc.)
#6
True or False? Ansible follows the mutable infrastructure paradigm
#7
True or False? Ansible uses declarative style to describe the expected end state
#8
What kind of automation you wouldn't do with Ansible and why?
#9
How do you list all modules and how can you see details on a specific module?
#10
What is an inventory file and how do you define one?
#11
What is a dynamic inventory file? When you would use one?
#12
Modify the following task to use a variable instead of the value "zlib" and have "zlib" as the default in case the variable is not defined
```
- name: Install a package
  package:
    name: "zlib"
    state: present
```
#13
How to make the variable "use_var" optional?
```
- name: Install a package
  package:
    name: "zlib"
    state: present
    use: "{{ use_var }}"
```
#14
What would be the result of the following play?
#15
When the value '2017'' will be used in this case: {{ lookup('env', 'BEST_YEAR') | default('2017', true) }}?
#16
If the value of certain variable is 1, you would like to use the value "one", otherwise, use "two". How would you do it?
#17
The value of a certain variable you use is the string "True". You would like the value to be a boolean. How would you cast it?
#18
You want to run Ansible playbook only on specific minor version of your OS, how would you achieve that?
#19
What the "become" directive used for in Ansible?
#20
What are facts? How to see all the facts of a certain host?
#21
What would be the result of running the following task? How to fix it?
```
- hosts: localhost
  tasks:
      - name: Install zlib
        package:
          name: zlib
          state: present
```
#22
Which Ansible best practices are you familiar with?. Name at least three
#23
Explain the directory layout of an Ansible role
#24
What 'blocks' are used for in Ansible?
#25
How do you handle errors in Ansible?
#26
You would like to run a certain command if a task fails. How would you achieve that?
#27
Write a playbook to install ‘zlib’ and ‘vim’ on all hosts if the file ‘/tmp/mario’ exists on the system.
#28
Write a single task that verifies all the files in files_list variable exist on the host
#29
Write a playbook to deploy the file ‘/tmp/system_info’ on all hosts except for controllers group, with the following content
#30
The variable 'whoami' defined in the following places:
- role defaults -> whoami: mario
  - extra vars (variables you pass to Ansible CLI with -e) -> whoami: toad
  - host facts -> whoami: luigi
  - inventory variables (doesn’t matter which type) -> whoami: browser
According to variable precedence, which one will be used?
#31
For each of the following statements determine if it's true or false:
- A module is a collection of tasks
  - It’s better to use shell or command instead of a specific module
  - Host facts override play variables
  - A role might include the following: vars, meta, and handlers
  - Dynamic inventory is generated by extracting information from external sources
  - It’s a best practice to use indentation of 2 spaces instead of 4
  - ‘notify’ used to trigger handlers
  - This “hosts: all:!controllers” means ‘run only on controllers group hosts
#32
Explain the Difference between Forks and Serial & Throttle.
#33
What is ansible-pull? How is it different from how ansible-playbook works?
#34
What is Ansible Vault?
#35
Demonstrate each of the following with Ansible:
- Conditionals
  - Loops
#36
What are filters? Do you have experience with writing filters?
#37
Write a filter to capitalize a string
#38
You would like to run a task only if previous task changed anything. How would you achieve that?
#39
What are callback plugins? What can you achieve by using callback plugins?
#40
What is the difference between include_task and import_task?
#41
File '/tmp/exercise' includes the following content
```
Goku = 9001
Vegeta = 5200
Trunks = 6000
Gotenks = 32
```
With one task, switch the content to:
```
Goku = 9001
Vegeta = 250
Trunks = 40
Gotenks = 32
```
#42
True or False? By default, Ansible will execute all the tasks in play on a single host before proceeding to the next host
#43
What is a "strategy" in Ansible? What is the default strategy?
#44
What strategies are you familiar with in Ansible?
#45
What the serial keyword is used for?
#46
How do you test your Ansible based projects?
#47
What is Molecule? How does it works?
#48
You run Ansible tests and you get "idempotence test failed". What does it mean? Why idempotence is important?
#49
How to find out the data type of a certain variable in one of the playbooks?
#50
What are collections in Ansible?
#51
Why Use Ansible Collections?