kubernetes/minikube

Minikube assumes remote docker host is same arch as local machine

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#13,303 opened on Jan 6, 2022

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Description

What Happened?

I'm using a MacOS ARM64 ("apple silicon") laptop as my dev machine, but I do builds on a remote Docker Linux AMD64 host using DOCKER_HOST="tcp://192.168.1.44". If I create the minikube-in-docker while sshed into the Linux machine, minikube installs an AMD64 docker build. However, if I try to minikube start from my Mac initially, while it pulls an x86_64 docker image, the kubeadm and kubectl binaries in /var/lib/minikube/binaries/v1.22.3/kubeadm are NOT x86_64 but arm64, which won't run on my AMD64 docker host (it gets wrongly sniffed as a shell script and fails to run, but see below its an ELF just wrong architecture).

root@minikube:/var/lib/minikube/binaries/v1.22.3# file kubeadm
kubeadm: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), statically linked, Go BuildID=Ix-qGg0m4Y1_wbf6TIrB/IthoOfPXT3QgQ194kYq7/518O26hpL0jI16q3MMZ0/cj371ZbZEp94cJXf24Pn, stripped

Attach the log file

log.txt

Operating System

macOS (Default)

Driver

Docker

Contributor guide

Tech stack
godockerkubernetes
Domain
devopsinfrastructurecloud
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Docker remote hostsGo programmingMinikube internals
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
Investigate how minikube determines the architecture for binaries, specifically the function that selects binary paths. Look at the code in `/var/lib/minikube/binaries/` and the `kubeadm` download logic. The fix should ensure that when using a remote Docker host, the architecture of the remote host is used instead of the local machine. Consider passing the remote host's architecture from the Docker client or using `uname m` inside the container. See comments for additional context.
Minikube assumes remote docker host is same arch as local machine · kubernetes/minikube#13303 | Good First Issue