How to pass environment variable to kubernetes yaml deployment files using github actions?-CodePudding

Hi I am deploying kubernetes yaml files using github actions. For example I have below deployment yaml file

apiVersion: apps/v1
kind: Deployment 
metadata: #Dictionary
  name: cepgateway
  namespace: "#{KUBERNETES_NAMESPACE}#"

In github actions I have different jobs like deploytodev,deploytotest etc.

In deploytodev I have set env variable as below

Deploy-Dev: 
    runs-on: 'ubuntu-latest'
    environment: 'Dev'
    env:
      KUBERNETES_NAMESPACE: cep-dev

I have set KUBERNETES_NAMESPACE some value and trying to access in my deployment yaml as

namespace: "#{KUBERNETES_NAMESPACE}#"

This doesnt work and throwing error

from server for: "Kubernetes/ingress.yml": ingresses.networking.k8s.io "cep-ingress" is forbidden: User "system:serviceaccount:serviceaccounts:cep-ci-sa" cannot get resource "ingresses" in API group "networking.k8s.io" in the namespace "#{KUBERNETES_NAMESPACE}#"

May I know is this is correct way I am following? Can some one help me to fix this. Any help would be appreciated. Thanks

CodePudding user response：

you could use the envsubst command in combination with the kubectl apply step, like:

namespace.yaml

apiVersion: apps/v1
kind: Deployment 
metadata: #Dictionary
  name: cepgateway
  namespace: ${K8S_NAMESPACE}

then

export K8S_NAMESPACE="cep-dev"

envsubst < namespace.yaml

will print:

apiVersion: apps/v1
kind: Deployment
metadata: #Dictionary
  name: cepgateway
  namespace: cep-dev

Combining it in a GitHub Action will be something like:

jobs:
  Deploy-Dev:
    runs-on: 'ubuntu-latest'
    environment: 'Dev'
    env:
      KUBERNETES_NAMESPACE: cep-dev
    steps:
        run: |
          envsubst < namespace.yaml | kubectl apply -f -