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cannot run jfrog executable from inside alpine linux container

I am using an alpine linux container and specifically python:3.4-alpine and openjdk:8-jdk-alpine. When I try to execute any script or executable that I have placed in the executable I get Not Found error.

alpine linux

python:3.4-alpine

openjdk:8-jdk-alpine

Not Found

For example. When in the python:3.4-alpine container I want to install jfrog I follow the command here (after I install curl via apk). This command downloads a shell script and pipes it to sh which downloads and creates a jfrog executable with the correct permissions. When I am trying to run this executable I am getting

python:3.4-alpine

jfrog

curl

jfrog

bin/sh: ./jfrog: not found

update

I discovered that the root user is using bin/ash by default, which I have no idea what it is. So I invoked bin/sh jfrog manually and I get

bin/ash

bin/sh jfrog

/ # bin/sh jfrog
jfrog: line 1: ELF: not found
jfrog: line 1: syntax error: unterminated quoted string

Any idea what I am doing wrong? I suspect that it has to do with only root user existing in the container.

4 Answers
4

I'm not sure but the jfrog executable is dynamically linked, and with ldd jfrog you get :

ldd jfrog

ldd jfrog
/lib64/ld-linux-x86-64.so.2 (0x55ffb4c8d000)
libpthread.so.0 => /lib64/ld-linux-x86-64.so.2 (0x55ffb4c8d000)
libc.so.6 => /lib64/ld-linux-x86-64.so.2 (0x55ffb4c8d000)


As you can see you have libc dependencies, and alpine come with musl.
You can try to add apk add libc6-compat but I'm not sure it will work

apk add libc6-compat

jfrog

the problem is, that jfrog cli was compiled against glibc and alpine linux only provides uclibc. To make it run under alpine its not trivial, you have to install a sandbox that is bigger than then alpine env. https://wiki.alpinelinux.org/wiki/Running_glibc_programs

Another possibility is to compile the jfrog binary yourself in alpine. This Dockerfile worked for me.

FROM golang:alpine
WORKDIR /app/
RUN apk update && apk add git

# checkout the latest tag of jfrog cli
RUN mkdir -p /go/src/github.com/jfrogdev/jfrog-cli-go
&& git clone https://github.com/JFrogDev/jfrog-cli-go /go/src/github.com/jfrogdev/jfrog-cli-go
&& cd /go/src/github.com/jfrogdev/jfrog-cli-go
&& git checkout $(git describe --tags `git rev-list --tags --max-count=1`)

RUN GOOS=linux go get github.com/jfrogdev/jfrog-cli-go/jfrog

FROM alpine
COPY --from=0 /go/bin/jfrog /usr/bin/

ENTRYPOINT ["jfrog"]


RUN GOOS=linux go get github.com/jfrogdev/jfrog-cli-go/jfrog-cli/jfrog

The script you are running begins with:

#!/bin/bash


Bash is not included with alpine by default. You can install it with:

apk update && apk add bash


Note that alpine is fairly stripped down by design, so there may be other missing dependencies that you'll need to add to make this script work.

jfrog

ubuntu

May be too late, but this probably might help someone else.

RUN curl -Lo /usr/bin/jfrog https://api.bintray.com/content/jfrog/jfrog-cli-go/$latest/jfrog-cli-linux-386/jfrog?bt_package=jfrog-cli-linux-386
&& chmod a+x /usr/bin/jfrog


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