ARGs aren't set when running DOCKERFILE

[AndrewWSHenry]

Discussed in #1683

^{Originally posted by AndrewWSHenry September 18, 2024}
hi,

I have not been able to build the kube-bench container using the instructions for "Running CIS benchmark in an EKS cluster" https://github.com/aquasecurity/kube-bench/blob/main/docs/running.md#running-cis-benchmark-in-an-eks-cluster. I have run the docker build command on Ubuntu 24.04 and OpenSUSE LEAP 15.6 and run into the same problem of the KUBECTL_VERSION ARG not being set/available. causing the wget to error.

The instructions don't mention a need to set those values and a brief look seems to suggest that the makefile run by the dockerfile should be setting those values. Just wondering if anyone is aware of a reason why the KUBECTL_VERSION arg has no value?

This is the relevant output.

Dockerfile:14

12 | # Add kubectl to run policies checks
13 | ARG KUBECTL_VERSION TARGETARCH
14 | >>> RUN wget -O /usr/local/bin/kubectl "https://dl.k8s.io/release/v${KUBECTL_VERSION}/bin/linux/${TARGETARCH}/kubectl"
15 | RUN wget -O kubectl.sha256 "https://dl.k8s.io/release/v${KUBECTL_VERSION}/bin/linux/${TARGETARCH}/kubectl.sha256"
16 | # Verify kubectl sha256sum

ERROR: failed to solve: process "/bin/sh -c wget -O /usr/local/bin/kubectl "https://dl.k8s.io/release/v${KUBECTL_VERSION}/bin/linux/${TARGETARCH}/kubectl\"" did not complete successfully: exit code: 8