CODEWITHSUNDEEP
dockerkuberneteskubernetes-helm
Sudhir Pandey
Sudhir Pandey

Reputation: 501

Running script containing kubectl commands in helm installation

I have a shell script that has several kubectl commands, I need to execute it as a part of helm installation.

#!/bin/bash kubectl create secret generic mysecret --from-literal=username=$USER_NAME --from-literal=password=$passwrd

I have written a job which execute this script.

apiVersion: batch/v1
kind: Job
metadata:
  name: "sagdfghd"

spec:
  template:        
    spec:
      containers:
        - name: sagdfghd
          image: {{ .Values.jobs.dockerRegistry }}
          command: ["sh", "-c", {{ .Files.Get "scripts/myscript.sh" | quote }} ]

But as the script is running inside container it is not able to find kubectl command.

Any idea how can I run this script??

TIA

Upvotes: 0

Views: 3158

Answers (2)

d0bry
d0bry

Reputation: 2270

@ericstaples provided link to installation documentation and it help to resolve issue:

What image does {{ .Values.jobs.dockerRegistry }} resolve to and does it have the kubectl tool installed on it?

It most likely does not have kubectl installed on it, so you will have to add the kubectl install instructions in your Dockerfile. Those instructions will depend on what your base Docker image is.

Since the Pod created by the Job will have a ServiceAccount attached to it, the kubectl tool running in the container will make calls to the cluster in which it's running via the ServiceAccount token, and will in fact create the Secret in the cluster, not the container (assuming it has the correct RBAC permissions).

Try it out. Making calls to the kube-apiserver (e.g. via kubectl) from containers is not uncommon.

Side note: creating a Secret object in a container makes absolutely no sense.

Upvotes: 1

erstaples
erstaples

Reputation: 2076

What image does {{ .Values.jobs.dockerRegistry }} resolve to and does it have the kubectl tool installed on it? It most likely does not have kubectl installed on it, so you will have to add the kubectl install instructions in your Dockerfile. Those instructions will depend on what your base Docker image is. See the following link:

https://kubernetes.io/docs/tasks/tools/install-kubectl/#install-kubectl

Upvotes: 1

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