Ansible/Host Naming - Revision history

Admin: /* Flags */

2018-12-08T18:36:24Z

Flags

← Older revision		Revision as of 18:36, 8 December 2018
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	=Flags=		=Flags=

	~~[[Category:Ansible]]~~		{{AnsibleFlag}}

	[[Category:Ansible Hosts]]		[[Category:Ansible Hosts]]
	[[Category:Infrastructure]]		[[Category:Infrastructure]]
	[[Category:Python]]		[[Category:Python]]

Admin: /* Example */

2018-11-08T19:21:36Z

Example

← Older revision		Revision as of 19:21, 8 November 2018
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	vagrant3		vagrant3
	</pre>		</pre>

			=Flags=

			[[Category:Ansible]]
			[[Category:Ansible Hosts]]
			[[Category:Infrastructure]]
			[[Category:Python]]

Admin at 18:04, 7 November 2018

2018-11-07T18:04:04Z

← Older revision		Revision as of 18:04, 7 November 2018
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			{{Main\|Ansible/Hosts}}

	=Automatically Labeling Hosts=		=Automatically Labeling Hosts=

Admin: /* Numbering Hosts */

2018-11-07T18:03:30Z

Numbering Hosts

← Older revision		Revision as of 18:03, 7 November 2018
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	=~~Numbering~~ Hosts=		=Automatically Labeling Hosts=

	As the number of hosts grows, we may want to deal with numbered hosts instead of individually-named hosts.		As the number of hosts grows, we may want to deal with numbered hosts instead of individually-named hosts.

			==Numbering Hosts==

	Vagrant allows the use of bracketed range notation to automatically label a large number of hosts with integers:		Vagrant allows the use of bracketed range notation to automatically label a large number of hosts with integers:
Line 16:		Line 18:
	web[01:20].example.com		web[01:20].example.com
	</pre>		</pre>

			==Lettering Hosts==

			Likewise, letters can also be used:

			<pre>
			[web]
			web-[a-q].example.com
			</pre>

			(last letter is however many letters you need.)

	==Example==		==Example==

Admin: /* Numbering Hosts */

2018-11-07T18:02:19Z

Numbering Hosts

← Older revision		Revision as of 18:02, 7 November 2018
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	[web]		[web]
	web[1:20].example.com		web[1:20].example.com
			</pre>

			To zero-pad the integers,

			<pre>
			[web]
			web[01:20].example.com
	</pre>		</pre>

Admin: Created page with "=Numbering Hosts= As the number of hosts grows, we may want to deal with numbered hosts instead of individually-named hosts. Vagrant allows the use of bracketed range notati..."

2018-11-07T18:01:49Z

Created page with "=Numbering Hosts= As the number of hosts grows, we may want to deal with numbered hosts instead of individually-named hosts. Vagrant allows the use of bracketed range notati..."

New page

=Numbering Hosts=

As the number of hosts grows, we may want to deal with numbered hosts instead of individually-named hosts.

Vagrant allows the use of bracketed range notation to automatically label a large number of hosts with integers:

<pre>
[web]
web[1:20].example.com
</pre>

==Example==

As an example, we can slim down the following inventory (hosts) file:

<pre>
[production]
delaware.example.com
georgia.example.com
maryland.example.com
newhampshire.example.com
newjersey.example.com
newyork.example.com
northcarolina.example.com
pennsylvania.example.com
rhodeisland.example.com
virginia.example.com

[staging]
ontario.example.com
quebec.example.com

[vagrant]
vagrant1 ansible_host=127.0.0.1 ansible_port=2222
vagrant2 ansible_host=127.0.0.1 ansible_port=2200
vagrant3 ansible_host=127.0.0.1 ansible_port=2201

[lb]
delaware.example.com

[web]
georgia.example.com
newhampshire.example.com
newjersey.example.com
ontario.example.com
vagrant1

[task]
newyork.example.com
northcarolina.example.com
maryland.example.com
ontario.example.com
vagrant2

[rabbitmq]
pennsylvania.example.com
quebec.example.com
vagrant3

[db]
rhodeisland.example.com
virginia.example.com
quebec.example.com
vagrant3
</pre>

Now, using numbered ranges:

<pre>
[production]
prod[1:10].example.com

[staging]
stage[1:2].example.com

[vagrant]
vagrant1 ansible_host=127.0.0.1 ansible_port=2222
vagrant2 ansible_host=127.0.0.1 ansible_port=2200
vagrant3 ansible_host=127.0.0.1 ansible_port=2201

[lb]
prod1.example.com

[web]
prod[2:4].example.com
stage1.example.com
vagrant1

[task]
prod[5:7].example.com
stage1.example.com
vagrant2

[rabbitmq]
prod8.example.com
stage2.example.com
vagrant3

[db]
prod[9:10].example.com
stage2.example.com
vagrant3
</pre>