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authorJulien Dessaux2021-03-11 19:47:26 +0100
committerJulien Dessaux2021-03-11 19:47:26 +0100
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treecbd779f6f8e36a28f4d6bd2788c21ce10d9ef122 /content/blog/ansible
parentSeveral fixes (diff)
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First big articles reformatting now that I properly understand hugo
Diffstat (limited to 'content/blog/ansible')
-rw-r--r--content/blog/ansible/_index.md5
-rw-r--r--content/blog/ansible/ansible-vault-example.md30
-rw-r--r--content/blog/ansible/custom-fact.md14
-rw-r--r--content/blog/ansible/dump-all-vars.md14
4 files changed, 38 insertions, 25 deletions
diff --git a/content/blog/ansible/_index.md b/content/blog/ansible/_index.md
deleted file mode 100644
index 3730fd7..0000000
--- a/content/blog/ansible/_index.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-title: "Ansible"
-linkTitle: "Ansible"
-weight: 30
----
diff --git a/content/blog/ansible/ansible-vault-example.md b/content/blog/ansible/ansible-vault-example.md
index fb6ef45..ac68feb 100644
--- a/content/blog/ansible/ansible-vault-example.md
+++ b/content/blog/ansible/ansible-vault-example.md
@@ -1,17 +1,31 @@
---
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).
diff --git a/content/blog/ansible/custom-fact.md b/content/blog/ansible/custom-fact.md
index 21e3300..10ab6bc 100644
--- a/content/blog/ansible/custom-fact.md
+++ b/content/blog/ansible/custom-fact.md
@@ -1,17 +1,19 @@
---
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 >}}
diff --git a/content/blog/ansible/dump-all-vars.md b/content/blog/ansible/dump-all-vars.md
index d5991a3..e1dea05 100644
--- a/content/blog/ansible/dump-all-vars.md
+++ b/content/blog/ansible/dump-all-vars.md
@@ -1,11 +1,13 @@
---
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.