First big articles reformatting now that I properly understand hugo

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Julien Dessaux 2021-03-11 19:47:26 +01:00
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---
title: "Ansible"
linkTitle: "Ansible"
weight: 30
---

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---
title: "Ansible vault example"
linkTitle: "Ansible vault example"
date: 2018-02-21
description: >
Ansible vault example
description: Getting started with ansible vault
tags:
- ansible
---
## Editing a protected file
Here is how to edit a vault protected file :
{{< highlight sh >}}
ansible-vault edit hostvars/blah.yml
{{< / highlight >}}
Here is how to put a multiline entry like a private key in vault (for a simple value, just don't use a `|`):
## Using a vault entry in a task or a jinja template
It is as simple as using any variable :
{{< highlight yaml >}}
- copy:
path: /etc/ssl/private.key
mode: 0400
content: '{{ ssl_key }}'
{{< / highlight >}}
## How to specify multiple lines entries
This is actually a yaml question, not a vault one but since I ask myself this frequently in this context here is how to put a multiple lines entry like a private key in vault (for a simple value, just don't use a `|`):
{{< highlight yaml >}}
ssl_key : |
@ -21,13 +35,7 @@ ssl_key : |
----- END PRIVATE KEY -----
{{< /highlight >}}
And here is how to use it in a task :
{{< highlight yaml >}}
- copy:
path: /etc/ssl/private.key
mode: 0400
content: '{{ ssl_key }}'
{{< / highlight >}}
## How to run playbooks when vault values are needed
To run a playbook, you will need to pass the `--ask-vault` argument or to export a `ANSIBLE_VAULT_PASSWORD_FILE=/home/julien/.vault_pass.txt` variable (the file needs to contain a single line with your vault password here).

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---
title: "Ansible custom facts"
linkTitle: "Ansible custom facts"
date: 2018-09-25
description: >
How to write custom facte with ansible
description: How to write custom facts with ansible
tags:
- ansible
---
## Introduction
Custom facts are actually quite easy to implement despite the lack of documentation about it.
## How they work
## How custom facts work
On any Ansible controlled host — that is, the remote machine that is being controlled and not the machine on which the playbook is run — you just need to create a directory at
`/etc/ansible/facts.d`. Inside this directory, you can place one or more `*.fact` files. These are files that return JSON data, which will then be included in the raft of facts that
`/etc/ansible/facts.d`. Inside this directory, you can place one or more `*.fact` files. These are files that must return JSON data, which will then be included in the raft of facts that
Ansible gathers.
The facts will be available to ansible at `hostvars.host.ansible_local.<fact_name>`.
@ -31,7 +33,7 @@ This will give you the fact `hostvars.host.ansible_local.mysql.password` for thi
## A more complex example
A more interesting example is something I use with small webapps. In the container that hosts the frontent I use a small ansible role to generate a mysql password on its first run, and
provision a database with a user that has access to it on a mysql server. This fact ensures that on subsequent runs we will stay idempotents. Here is how it works.
provision a database with a user that has access to it on a mysql server. This fact ensures that on subsequent runs we will stay idempotent.
First the fact from before, only slightly modified :
{{< highlight sh >}}

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---
title: "Dump all ansible variables"
linkTitle: "Dump all ansible variables"
date: 2019-10-15
description: >
How to dump all variables used by ansible
description: How to dump all variables used by ansible in a task
tags:
- ansible
---
## Task to use
Here is the task to use in order to achieve that :
{{< highlight yaml >}}
@ -13,6 +15,8 @@ Here is the task to use in order to achieve that :
action: template src=dumpall.j2 dest=ansible.all
{{< /highlight >}}
## Associated template
And here is the template to use with it :
{{< highlight jinja >}}
@ -36,3 +40,7 @@ HOST Variables ("hostvars"):
--------------------------------
{{ hostvars | to_nice_json }}
{{< /highlight >}}
## Output
If you are running a local task, the output will be in your playbook directory. Otherwise, it will be on the target machine(s) in a `.ansible/tmp/ansible.all` file under the user your are connecting the machine(s)' with.