Tekton mongo task error - Error executing command

Question

Goal - Deploy Graylog environment with Elasticsearch and Mongodb. 1 pod each of graylog and mongo and 2 pods of ES.

Currently, I am trying to deploy mongodb as task and a service. I have written a script for the same, but it does not work as it is supposed to.

(EDITED)

Some more info regarding my Kubernetes cluster -

• Kubernetes cluster is running on a cloud server. I connect from my local machine using kubectl command to fetch and perform basic operations. (Copied kubeconfig file to my local machine for the connection)
• I have installed tekton cli on my local machine.

Current Scenario - I have created a task and a deployment script for my mongo-deployment.

Here is my simple deployment script - mongo-deploy.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: mongo-deploy
  labels:
    service: mongo-deploy
spec:
  replicas: 1
  selector:
    matchLabels:
      service: mongo-deploy
  template:
    metadata:
      labels:
        service: mongo-deploy
    spec:
      containers:
      - name: mongodb
        image: mongo:4.2
        ports:
        - containerPort: 27017

---
apiVersion: v1
kind: Service
metadata:
  name: mongo
spec:
  selector:
    service: mongo-deploy
  ports:
  - name: "27017"
    port: 27017
    targetPort: 27017

Here is my task-script - task-mongo-deploy.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:
  name: mongo-deploy
spec:
  steps:
    - name: mongo-deploy
      image: mongo:4.2
      command: [echo -----------------------------------]
      args:
        - |-
          kubectl apply -f /path-to-location/tekton-scripts/mongo-deploy.yaml
          echo -----------------------------------

Steps I performed -

1. kubectl apply -f task-mongo-deploy.yaml
2. tkn task start mongo-deploy
3. Here is my output -

$ tkn task start mongo-deploy
TaskRun started: mongo-deploy-run-mdblw

In order to track the TaskRun progress run:
tkn taskrun logs mongo-deploy-run-mdblw -f -n default
$ tkn taskrun logs mongo-deploy-run-mdblw -f -n default
task mongo-deploy has failed: "step-mongo-deploy" exited with code 1 (image: "docker-pullable://mongo@sha256:5c3059c8191861aaf766ce1ac592ebb42ea71ff13951701049bca93e8d614f96"); for logs run: kubectl -n default logs mongo-deploy-run-mdblw-pod-6fgkc -c step-mongo-deploy

[mongo-deploy] 2021/06/04 14:53:37 Error executing command: exec: "echo -----------------------------------": executable file not found in $PATH

container step-mongo-deploy has failed  : [{"key":"StartedAt","value":"2021-06-04T14:53:37.297Z","type":"InternalTektonResult"}]

It is still not running. Any idea where I went wrong?

Answer 1

You are creating a Task "mongo-deploy" that is using kubectl to deploy an application to the cluster. For this task to work properly, it need an image that contains the kubectl tool - you don't need a mongodb-image in the Task, it is only using kubectl.