Question 232704 in Docker Question posted in
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Is it possible to combine the secrets for two docker registries used by kubernetes?

I have the following two secrets for two different docker registries:

secret1-registry.yaml:

apiVersion: v1
data:
  .dockerconfigjson: somevalue1
kind: Secret
metadata:
  name: metadata1
type: kubernetes.io/dockerconfigjson

secret2-registry.yaml:

apiVersion: v1
data:
  .dockerconfigjson: somevalue2
kind: Secret
metadata:
  name: metadata2
type: kubernetes.io/dockerconfigjson

Is it possible to combine the two secrets?

Tags:

2

Answers


  1. 0

    If you want to manually combine, the .dockerconfigjson field should be a base64-encoded representation of the combined Docker configuration JSON. To create the base64-encoded data, you can use a tool like echo -n ‘<json_data>’ | base64 -w 0.

    apiVersion: v1
data:
  .dockerconfigjson: combined_base64_encoded_data
kind: Secret
metadata:
  name: combined-docker-secrets
type: kubernetes.io/dockerconfigjson

    You can also use kubectl commands to create the combined secret. Assuming you have the content of somevalue1 and somevalue2 as actual Docker configuration JSONs.

    # Base64 encode the combined Docker configuration JSON
combined_data=$(echo -n '{"auths":{"registry1":{"auth":"somevalue1"},"registry2":{"auth":"somevalue2"}}}' | base64 -w 0)

# Create the combined secret
kubectl create secret generic combined-docker-secrets 
  --from-literal=.dockerconfigjson=$combined_data 
  --type=kubernetes.io/dockerconfigjson
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  2. 0

    Why would you want to combine those secrets? When you specify an imagePullSecret for a Deployment or a similar resource, you can provide a list of imagePullSecrets to use during the container image pull phase.

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