Using a custom docker image for Elastic Cloud on Kubernetes

Elastic Orchestration Elastic Cloud on Kubernetes (ECK)
1

Hi,

I'm looking into or doing some research on Elastic Cloud on Kubernetes and went through the Quickstart page but I couldn't find a way to use ECK with a custom ES docker image hosted on docker hub. Is there a way to do so?

2

Curious to know why you want to run a custom ES docker image. As we post all the updates keep the containers patched with latest security fixes.

3

Both the Elasticsearch and the Kibana CRDs have an image attribute that allow you specify a custom docker image.

4

I want to build a custom image based on the official ES docker image to add few things for my needs.

5

Thanks. I went through the CRD definition and saw this attribute, however, I'm not certain how to use it if I have a private docker repo. I tried with the following:

cat <<EOF | kubectl apply -f -
apiVersion: elasticsearch.k8s.elastic.co/v1alpha1
kind: Elasticsearch
metadata:
name: quickstart
spec:
image: rutomo/custom-es:6.8.0
nodes:

  • nodeCount: 1
    config:
    node.master: true
    node.data: true
    node.ingest: true
    EOF

I got an error saying that it couldn't parse Elasticsearch version so I assume version is required so I tried to the following:

cat <<EOF | kubectl apply -f -
apiVersion: elasticsearch.k8s.elastic.co/v1alpha1
kind: Elasticsearch
metadata:
name: quickstart
spec:
image: rutomo/custom-es
version: 6.8.0
nodes:

  • nodeCount: 1
    config:
    node.master: true
    node.data: true
    node.ingest: true
    EOF

I got Init:ImagePullBackOff which I assumed it's because it's a private repo so I have to pass docker hub secret, however, I'm not sure how to do this as it's not mentioned anywhere in the quickstart or documentation. Also, I'm not sure if I did it correctly because I have a specific tag for my custom ES image. I will go through into the CRD again and see if I can find anything for the secret.

EDIT: ignore the formatting since I'm not sure how to format it properly.

6

In principle what is written in the Kubernetes documenation applies also to ECK
https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/

For ECK 0.8.0 we don't support a full podTemplate yet which means you cannot unfortunately specify the necessary imagePullSecrets. We will fix that in the next release.

7

Thanks for confirming, Peter.