Bug 1784532
Summary: | Document `FROM` replacement behavior in multistage Docker builds | ||
---|---|---|---|
Product: | OpenShift Container Platform | Reporter: | Adam Kaplan <adam.kaplan> |
Component: | Build | Assignee: | Adam Kaplan <adam.kaplan> |
Status: | CLOSED ERRATA | QA Contact: | wewang <wewang> |
Severity: | medium | Docs Contact: | |
Priority: | unspecified | ||
Version: | 4.3.0 | CC: | aos-bugs, scuppett, wzheng |
Target Milestone: | --- | ||
Target Release: | 4.4.0 | ||
Hardware: | Unspecified | ||
OS: | Unspecified | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | Bug Fix | |
Doc Text: |
Cause: `FROM` replacement in multistage dockerfile builds was not clear
Consequence: developers may not understand how OpenShift manipulates the Dockerfile provided to a build
Fix: clarified the text in our API and docs.
Result: command line and online docs make it clear that the last FROM statement in a Dockerfile is changed if a developer provides a `from:` imagestream in their BuildConfig spec
|
Story Points: | --- |
Clone Of: | Environment: | ||
Last Closed: | 2020-05-04 11:20:24 UTC | Type: | Bug |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: |
Description
Adam Kaplan
2019-12-17 16:20:56 UTC
Setting to active development branch for investigation (4.4). Clones will be created for prior releases where backports needed, if any. Verified in 4.4.0-0.nightly-2020-02-09-193413 Steps: 1. Use bc to create a build kind: "BuildConfig" apiVersion: v1 metadata: name: multi-test spec: source: dockerfile: |- FROM scratch as test USER 1001 FROM centos:7 COPY --from=test /usr/bin/curl /test/ COPY --from=busybox:latest /bin/echo /test/ COPY --from=busybox:latest /bin/ping /test/ strategy: dockerStrategy: from: kind: ImageStreamTag name: ruby:2.2 namespace: openshift 2. Check the build log [root@wangwen ~]# oc logs -f build/multi-test-1 Replaced Dockerfile FROM image centos:7 Caching blobs under "/var/cache/blobs". Writing manifest to image destination Storing signatures STEP 1: FROM scratch AS test STEP 2: USER 1001 a4d03bdf8e8d6125b084fefe2c9580ec739efabc29fa6f345e7690ba878c152d STEP 3: FROM image-registry.openshift-image-registry.svc:5000/openshift/ruby@sha256:xxxx ###the last `FROM` statement in a multistage Dockerfile is be replaced STEP 4: COPY --from=test /usr/bin/curl /test/ Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:0581 |