How can i use templates and parameter files on kubernetes

Kubernetes
#1

is there a way to use templates and parameters in kubernetes? (its supported in openshift)

Example:

spec:
containers:
- env:
- name: REDIS_URL
value: ${REDIS_URL}

parameters:

  • name: REDIS_URL
    displayName: REDIS_URL
    value: actual redis URL

in openshift, i am able to use template parameter file based on the env (dev.env) and deploy using dynamic values.

for ex:

file name - dev.env contains
{
env: dev
profile: dev
url: dev_url
}

file name - test.env contains
{
env: test
profile: test
url: test_url
}

command during deployment

if (env == dev)
oc process -f deployment.yaml --param-file=dev.env

elif (env == test)
oc process -f deployment.yaml --param-file=test.env

Reference:
https://docs.openshift.com/container-platform/4.3/openshift_images/using-templates.html#templates-overview_using-templates

pls let me know, if there is a similar support provided in kubernetes (i am new to kubernetes)
also let me know, if you need more details.

#2

@k8sGuy: if you know the solution, pls reply.

#3

Hello, saravanaprabu
You can use configMaps in the kubernetes.

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#4

Another option is to use Helm, which is a sort of package manager for K8s. Helm allows you to set up template files and variable files (contained in a “Helm Chart”) for deploying your own resources to a K8s cluster. It takes a bit to learn Helm (I have only started it myself) but once you have it figured out it can be quite powerful.

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