[pkg-go] Bug#1030930: podman: DNS resolution fails in 'podman build' but works in 'podman run'

[Reinhard Tartler]

Control: tag -1 + unreproducible moreinfo

Hi Kevin,

great to hear from you in this space!

On Thu, Feb 9, 2023 at 8:36 AM Kevin P. Fleming <kevin at km6g.us> wrote:

> Package: podman
> Version: 4.3.1+ds1-5+b1
> Severity: important
>
> Dear Maintainer,
>
> I am seeing DNS resolution fail when using 'podman build' but succeed when
> using 'podman run', with a Dockerfile which contains the same commands I
> run
> manually in the 'podman run'-launched shell.
>
> Dockerfile
> ----------
> FROM alpine:3.10
> RUN cat /etc/resolv.conf
> RUN apk add tar
>

Unfortunately, I can't reproduce. Please help me to reproduce this issue.
Also, maybe upstream has an idea, can you please report this issue at
https://github.com/containers/podman/issues/new/choose. In any case, here
is the output that I get:

siretart at x1:/tmp/dnstest$ cat >> Containerfile
FROM alpine:3.10
RUN cat /etc/resolv.conf
RUN apk add tar
siretart at x1:/tmp/dnstest$ cat Containerfile
FROM alpine:3.10
RUN cat /etc/resolv.conf
RUN apk add tar
siretart at x1:/tmp/dnstest$ podman build .
STEP 1/3: FROM alpine:3.10
Resolved "alpine" as an alias
(/etc/containers/registries.conf.d/shortnames.conf)
Trying to pull docker.io/library/alpine:3.10...
Getting image source signatures
Copying blob 396c31837116 done
Copying config e7b300aee9 done
Writing manifest to image destination
Storing signatures
STEP 2/3: RUN cat /etc/resolv.conf
search int.tauware.de
nameserver 10.0.2.3
nameserver 192.168.88.3
--> 2ce59772eaf
STEP 3/3: RUN apk add tar
fetch http://dl-cdn.alpinelinux.org/alpine/v3.10/main/x86_64/APKINDEX.tar.gz
fetch
http://dl-cdn.alpinelinux.org/alpine/v3.10/community/x86_64/APKINDEX.tar.gz
(1/1) Installing tar (1.32-r1)
Executing busybox-1.30.1-r5.trigger
OK: 6 MiB in 15 packages
COMMIT
--> 7c1bfd9e030
7c1bfd9e030f07b05cc9427a97c0bc5ff73bca5436bce389ad81da1a64f64a11



-- 
regards,
    Reinhard
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