GoogleContainerTools/skaffold

Download tar artifact from kaniko pod

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#7,133 opened on Feb 20, 2022

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area/buildbuild/kanikohelp wantedkind/feature-requestpriority/p3

Description

Expected behavior

I am able to get built docker image archived to tar from in cluster kaniko pod (to test it via container-structure-test and then push via crane)

Actual behavior

Tar artifact is built but I am not able to get it

Information

  • Skaffold version: v1.36.0
  • Operating system: Ubuntu 20.04
  • Installed via: skaffold.dev
  • Contents of skaffold.yaml:
apiVersion: skaffold/v2beta27
kind: Config
build:
  artifacts:
    - image: 1111111111.dkr.ecr.us-east-1.amazonaws.com/example/deployer
      kaniko:
        noPush: true
        tarPath: image.tar
        logFormat: text
  tagPolicy:
    envTemplate:
      template: "{{.SKAFFOLD_IMAGE_TAG}}"
  cluster:
    concurrency: 0
    namespace: my-namespace
    serviceAccount: skaffold-kaniko
    dockerConfig:
      secretName: jenkins-agent-docker-config-json
    resources:
      requests:
        memory: 128Mi
        cpu: 200m
      limits:
        memory: 1Gi
        cpu: 1

Steps to reproduce the behavior

  1. skaffold build
  2. Tar is built successfully

Contributor guide

Tech stack
godockerkubernetes
Domain
devopsclicloud
Issue type
feature
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.
half day
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.
mostly clear
Prerequisites
Skaffold basicsKaniko usageKubernetes pod access
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
The issue requests the ability to download the tar artifact created by kaniko during a skaffold build. The user can build the image with tarPath set but cannot retrieve the tar. Investigation should focus on how skaffold handles kaniko pods and whether the tar is stored in the pod's filesystem or elsewhere. Check the kaniko builder code in pkg/skaffold/build/kaniko/ for how the tar archive is handled after the build. Also review any existing comments in the issue for proposed solutions or workarounds. Consider implementing a feature to copy the tar from the kaniko pod using kubectl cp or similar tool.
Download tar artifact from kaniko pod · GoogleContainerTools/skaffold#7133 | Good First Issue