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So friends, let's walk through the validation challenge.

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So the very first thing that we're going to have to do is to define a DNS

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server of 8.8.8.8.8

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and the host variable file for the first managed device in the inventory.

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So in my inventory right here, my first device is Blue Box.

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So I'll go into my blue box dot yml.

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And what I have to do is to go into insert mode, have my three hyphens at the

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top,

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and then define my DNS server.

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So I'm going to say is DNS hyphen servers.

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And I'm going to actually make this plural because even though I don't happen
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And I'm going to actually make this plural because even though I don't happen

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to have

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multiple DNS servers, but as a possibility for expansion in the future.

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And more importantly, the keys have to be consistent across the different files

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.

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That is if we're going to call the same key from the same template.

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So I'm just going to use DNS servers plural.

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Then I'll have my hyphen and specify 8.8.8.8.

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So like I say, there's only one value in this particular array at this moment

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in time.

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So let's write in quits.

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And now going to the second managed device now in this particular file here,

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we have to define two DNS servers of 8.8.8.8.8 and 8.8.4.4.
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we have to define two DNS servers of 8.8.8.8.8 and 8.8.4.4.

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So we're going to insert mode once again, have our three hyphens at the top,

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use the same key, which is DNS underscore servers once again plural.

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And then we'll have an array object and specify all the aids for the first

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server.

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And then below we'll have 8.8.4.4.

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If I press escape colon, write and quits.

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That is the first portion of the validation done.

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The next thing we're going to have to do is to write a ginger two template

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called validation dot j2 that's going to render the DNS configuration
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called validation dot j2 that's going to render the DNS configuration

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for each device's etzer resolve dot conf configuration file.

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So if I go back and I go into my templates directory,

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I'm going to create one called validation dot j2.

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And let's just go in and modify this now.

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Now in this case here, what I want to do is to invoke a loop

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because we can have multiple DNS servers.

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So I'm going to insert mode.

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I'm not going to use my three hyphens at the top because we're not dealing

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with the yaml file now.

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What I will do is have my curly brace and then my percentage sign

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to indicate my control.

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And then I will just say four and create a name for a variable.
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And then I will just say four and create a name for a variable.

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I should say server and then we specify the DNS servers key.

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Again, this is why we want to have the same key consistent across both files.

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And then I'll have my percentage sign and then curly brace.

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And all I'm going to do here is say name server.

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And then use my double curly braces here and populate the variable value.

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So I'll just have server in here.

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And then what I'm going to have to do, I'm going to have to close off this for

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loop

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by saying end for perfect.

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So if I just escape colon, write and quit.
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So if I just escape colon, write and quit.

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The next thing I'm going to have to do is to write an answerable playbook

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that is going to target all the devices in the inventory.

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So let's go back a directory and I'll just say them validation dot yml.

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Again, call this playbook, enter new so wish.

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I'm going to insert mode.

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Now we'll have my three hyphens.

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We're back using yml once again.

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And at the very top, I'm going to have my hyphen and then specify a name for

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this play.

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I'll just say validation for templates.

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Okay, call this the important part here is that we target the hosts of the all

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group.
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group.

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And now I'm going to define my tasks.

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So hyphen name and the name of the task will just be render conflicts.

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And now I'm going to use the answerable built in template module.

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So what's the source going to be?

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Well, the actual file we're going to use this time is going to be validation J2

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and the

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destination.

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But what does it actually specify?

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As per the instruction, the destination file should be called it say resolve

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dot com dot

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backup or not actually wanting to modify the real configuration file.

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So in this case here, I will say forward slash it say forward slash resolve dot
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So in this case here, I will say forward slash it say forward slash resolve dot

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com dot backup

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here.

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Okay.

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So what that now done, all I will do is press escape colon wq write and quit

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and I will

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say answerable hyphen playbook validation and hit enter.

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Now because you the changes have been made, let's go to our devices to verify.

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So if I say cat, it say resolve dot com dot backup and I enter as we can see

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here, the

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yellow box has name server eight dot eight dot eight dot eight and name server

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eight dot

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eight dot four dot four.

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Now if we go to the blue box here, if we go into it say resolve dot com dot
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Now if we go to the blue box here, if we go into it say resolve dot com dot

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backup and to

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enter, as we can see here, the configuration has been rendered name server

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eight dot eight

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dot eight.

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So that is us for our validation challenge for gender templating.

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I hope it's been informative for you and I'd like to thank you for viewing.