Running a bash script from alpine based docker

Question

I have Dockerfile containing:

FROM alpine

COPY script.sh /script.sh

CMD ["./script.sh"]

and a script.sh (with executable permission):

#!/bin/bash
echo "hello world from script file"

when I run

docker run --name testing fff0e5c81ca0

where fff0e5c81ca0 is the id after building, I get an error

standard_init_linux.go:195: exec user process caused "no such file or directory"

So how can I solve it?

I got it. Do you want to add answer? Or I will update my answer @Maroun — Shahriar, Feb 03 '18 at 12:42
I got this ... docker: Error response from daemon: OCI runtime create failed: container_linux.go:296: starting container process caused "exec: \"sh /script.sh\": stat sh /script.sh: no such file or directory": unknown. ERRO[0002] error waiting for container: context canceled — Mumbaikar007, Feb 03 '18 at 12:48
Possible duplicate of [How to run a bash script in an Alpine Docker container](https://stackoverflow.com/questions/44803982/how-to-run-a-bash-script-in-an-alpine-docker-container) — Joe, Feb 03 '18 at 14:10

Shahriar · Accepted Answer · 2018-02-03T12:59:03.117

17

To run a bash script in alpine based image, you need to do either one

You need to do any one of these two or both

Or, like @Maroun's answer in comment, you can change your CMD to execute your bash script

CMD ["sh", "./script.sh"]

edited Feb 03 '18 at 12:59

answered Feb 03 '18 at 12:33

Shahriar

1

Or change to `CMD ["sh /script.sh"]`. – Maroun Feb 03 '18 at 12:34
I think CMD requires an array. – Mumbaikar007 Feb 03 '18 at 12:54
yes, you can provide multiple args to ENTRYPOINT using CMD with array. Thanks to @Maroun – Shahriar Feb 03 '18 at 12:55
please, delete your last comment `upvoted`. You can be flagged. Its agains roles. @Mumbaikar007 – Shahriar Feb 03 '18 at 12:58
You can use Bash to run `sh` scripts but not vice versa. The OP's current script is `sh` compatible but you really should at least mention that there is a difference. See also https://stackoverflow.com/questions/5725296/difference-between-sh-and-bash – tripleee Feb 03 '18 at 13:47

score 1 · Answer 2 · answered Nov 05 '18 at 04:26

1

Your Dockerfile may look like this:

FROM openjdk:8u171-jre-alpine3.8
COPY script.sh /script.sh
CMD ["sh", "./script.sh"]

answered Nov 05 '18 at 04:26

yuen26

FROM alpine:3.6 RUN apk --no-cache add curl bash RUN apk add --no-cache tzdata RUN apk add --update bash RUN mkdir -p /var/log/cron \ && touch /var/log/cron/cron.log \ && mkdir -m 0644 -p /etc/cron.d COPY run.sh /usr/share/run.sh ADD curlurl /etc/crontabs/sit/ ADD curlurl2 /etc/crontabs/uat/ RUN chmod +x /usr/share/run.sh CMD bash -c "crond -L /var/log/cron/cron.log && tail -F /var/log/cron/cron.log" WORKDIR /usr/share/ #CMD ["sh", "./run.sh"] in run.sh (#!/bin/bash cp -f /etc/crontabs/sit/curlurl /etc/crontabs/root) but getting error as file not found. – Baharul Dec 12 '19 at 16:32

2 Answers2