We are using one namespace for the develop environment and one for the staging environment. Inside each one of this namespaces we have several configMaps and secrets but there are a lot of share variables between the two environments so we will like to have a common file for those.
Is there a way to have a base configMap into the default namespace and refer to it using something like:
- envFrom:
- configMapRef:
name: default.base-config-mapIf this is not possible, is there no other way other than duplicate the variables through namespaces?
They cannot be shared, because they cannot be accessed from a pods outside of its namespace. Names of resources need to be unique within a namespace, but not across namespaces.
Workaround it is to copy it over.
Copy secrets between namespaces
$ kubectl get secret <secret-name> --namespace=<source-namespace> --export -o yaml | kubectl apply --namespace=<destination-namespace> -f -
Copy configmaps between namespaces
$ kubectl get configmap <configmap-name> --namespace=<source-namespace> --export -o yaml | kubectl apply --namespace=<destination-namespace> -f -
Flag export have been deprecated in 1.14 Deprecate --export flag from get command #73787 Instead following command can be used:
kubectl get secret <secret-name> — namespace=<source-namespace> -o yaml | sed ‘s/namespace: <from-namespace>/namespace: <to-namespace>/’ | kubectl create -f
If someone still see a need for the flag, export script was written by @zoidbergwill that is doing that nicely.