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Update Ansible docs (#3353)

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- Add the additional resources section
- change instances of ```yml to ```yaml for consistency
- Remove extra trailing whitespace
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Will Fife 2018-10-30 13:04:56 -07:00 committed by Divay Prakash
parent dc52cc8ee9
commit 70a2200201
1 changed files with 15 additions and 9 deletions
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@ -6,7 +6,7 @@ contributors:
filename: LearnAnsible.txt filename: LearnAnsible.txt
--- ---
```yml ```yaml
--- ---
"{{ Ansible }}" is an orchestration tool written in Python. "{{ Ansible }}" is an orchestration tool written in Python.
@ -14,7 +14,7 @@ filename: LearnAnsible.txt
## Example ## Example
An example playbook to install apache and configure log level An example playbook to install apache and configure log level
```yml ```yaml
--- ---
- hosts: apache - hosts: apache
@ -163,7 +163,7 @@ This example-playbook would execute (on all hosts defined in the inventory) two
* `ping` that would return message *pong* * `ping` that would return message *pong*
* `shell` that execute three commands and return the output to our terminal * `shell` that execute three commands and return the output to our terminal
```yml ```yaml
- hosts: all - hosts: all
tasks: tasks:
@ -213,7 +213,7 @@ It is a great way to introduce `object oriented` management for your application
Role can be included in your playbook (executed via your playbook). Role can be included in your playbook (executed via your playbook).
```yml ```yaml
- hosts: all - hosts: all
tasks: tasks:
@ -427,7 +427,7 @@ You can use the jinja in the CLI too
ansible -m shell -a 'echo {{ my_variable }}` -e 'my_variable=something, playbook_parameter=twentytwo" localhost ansible -m shell -a 'echo {{ my_variable }}` -e 'my_variable=something, playbook_parameter=twentytwo" localhost
``` ```
In fact - jinja is used to template parts of the playbooks too In fact - jinja is used to template parts of the playbooks too
```yml ```yaml
#check part of this playbook: playbooks/roles/sys_debug/tasks/debug_time.yml #check part of this playbook: playbooks/roles/sys_debug/tasks/debug_time.yml
- local_action: shell date +'%F %T' - local_action: shell date +'%F %T'
register: ts register: ts
@ -638,18 +638,19 @@ But ansible is way more! It provides an execution plans, an API, library, callba
It is an agent-less tool - every agent consumes up to 16MB ram - in some environments, it may be noticable amount. It is an agent-less tool - every agent consumes up to 16MB ram - in some environments, it may be noticable amount.
It is agent-less - you have to verify your environment consistency 'on-demand' - there is no built-in mechanism that would warn you about some change automatically (this can be achieved with reasonable effort) It is agent-less - you have to verify your environment consistency 'on-demand' - there is no built-in mechanism that would warn you about some change automatically (this can be achieved with reasonable effort)
Official GUI Tool (web inferface) - Ansible Tower - is great, but it is expensive. There is no 'small enterprice' payment plan. Easy workaround with Rundeck or Jenkins is possible with reasonable workload. Official GUI Tool (web inferface) - Ansible Tower - is great, but it is expensive. There is no 'small enterprice' payment plan, however Ansible AWX is the free open source version we were all waiting for.
#### Pros #### Pros
It is an agent-less tools In most scenarios, it use ssh as a transport layer. It is an agent-less tools In most scenarios, it use ssh as a transport layer.
In some way you can use it as 'bash on steroids'. In some way you can use it as 'bash on steroids'.
It is very-very-very easy to start. If you are familiar with ssh concept - you already know Ansible (ALMOST). My personal record is: 'I did show "how to install and use ansible" (for simple raspberry pi cluster management) - it took me 30 seconds to deliver a complete working example !!!)' It is very-very-very easy to start. If you are familiar with ssh concept - you already know Ansible (ALMOST). My personal record is: 'I did show "how to install and use ansible" (for simple raspberry pi cluster management) - it took me 30 seconds to deliver a complete working example !!!)'
I do provide a training services - I'm able to teach a production-ready person - in 8 hours (1 training day)! It covers all needed to work aspects! No other tool can match this ease of use! I do provide a training services - I'm able to teach a production-ready person - in 8 hours (1 training day)! It covers all needed to work aspects! No other tool can match this ease of use!
It executes 'as is' - other tools (salt, puppet, chef - might execute in different scenario than you would expect) It executes 'as is' - other tools (salt, puppet, chef - might execute in different scenario than you would expect)
Documentation is at the world-class standard! Documentation is at the world-class standard!
The comunity (github, stackOverflow) would help you very fast. The comunity (github, stackOverflow) would help you very fast.
Writing own modules and extension is fairly easy. Writing own modules and extension is fairly easy.
Ansible AWX is the open source version of Ansible Tower we have been waiting for, which provides an excellent UI.
#### Neutral #### Neutral
Migration Ansible<->Salt is failrly easy - so if you would need an event-driven agent environment - it would be a good choice to start quick with Ansible, and convert to salt when needed. Migration Ansible<->Salt is failrly easy - so if you would need an event-driven agent environment - it would be a good choice to start quick with Ansible, and convert to salt when needed.
@ -657,7 +658,12 @@ Migration Ansible<->Salt is failrly easy - so if you would need an event-driven
#### Some concepts #### Some concepts
Ansible uses ssh or paramiko as a transport layer. In a way you can imagine that you are using a ssh with API to perform your action. Ansible uses ssh or paramiko as a transport layer. In a way you can imagine that you are using a ssh with API to perform your action.
The simplest way is to execute remote command in more controlled way (still using ssh). The simplest way is to execute remote command in more controlled way (still using ssh).
On the other hand - in advanced scope - you can wrap Ansible (use python Ansible code as a library) with your own Python scrips! This is awesome! It would act a bit like Fabric then. On the other hand - in advanced scope - you can wrap Ansible (use python Ansible code as a library) with your own Python scrips! This is awesome! It would act a bit like Fabric then.
## Additional Resources
* [Servers For Hackers: An Ansible Tutorial](https://serversforhackers.com/c/an-ansible-tutorial)
* [A system administrator's guide to getting started with Ansible - FAST!](https://www.redhat.com/en/blog/system-administrators-guide-getting-started-ansible-fast)
* [Ansible Tower](https://www.ansible.com/products/tower) - Ansible Tower provides a web UI, dashboard and rest interface to ansible.
* [Ansible AWX](https://github.com/ansible/awx) - The Open Sourc version of Ansible Tower.