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Hi, Let us introduce the templating concept. In the earlier lecture we saw how to create the config

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map, YAML file and deploy the config map as a part of kubernetes cluster.

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So this is what the config map yaml file that we had created. I'm going to use the same config map yaml

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file and introduce the templating concept.

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Let me get into this particular file and here

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As a part of the name, I'm going to introduce the template and for the template derivative to include

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within the code, we will be using the double open flower bracket and double closing flower bracket

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I'm going to change the name. Here

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I'm going to introduce the derivative so that it can get the values either from the values file or

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from the built in objects.

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Now let me introduce the two ways where

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We can get the values for the template.

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One is from the values file. Another one

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There are some builtin objects which can provide the value. To get started

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We are going to understand about the built in objects.

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Builtin objects are nothing but every chart

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It will be having a list of values which can be retrieved using the builtin objects

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Variable name say, for example .release.name will provide the name of the release that we are creating

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using that specific chart.

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So let me go ahead and use this so that I don't need to create the values file, in the next lecture

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We will see how to use the values file.

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So within the flower bracket derivative, I will insert this particular value. So the syntax is .release.name, Similar to this

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There are n number of builtin objects like namespace, IsUpgrade so we can go ahead and use slowly in

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the future lectures we will start using one after the other.

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Now let me go ahead and save this particular config file and install this specific template.

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So let me install the template helm install and name of the release.

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So this is what will be used within the release.name, and it will get substituted when it is creating

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that specific config file. The chart got deployed.

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Let me go ahead and get the details about the deployment helm ls. So I do have a deployment

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the name release name-test

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I can get more details about this particular deployment using the command get manifest.

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So it's going to provide the manifest file, that is the YAML file that we had used

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If you look at the derivative that we had used that got replaced with the release name that we had provided.

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So I should have a config file with this specific name

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I can check whether that particular config file, existing or not.

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kubectl describe config map and the name of this specific config map. Yes, I do have.

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So we have successfully used the template derivative for the first time and within the YAML file, we

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have used the builtin object to replace within the template derivative.

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Let me go into the charts and get more detail about this particular YAML file.

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So this is what the template derivative that we had introduced and to fill in the value for this particular

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derivative we use the builtin objects.

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So in the next lecture, we're going to use the values file and replace this particular template derivative.

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So in a quick summary we have seen how to use the template derivative

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and what is the syntax of it and how to use the builtin objects.