Kaniko: RUN Not executed properly

[sadortun]

Hi, am i new to this project, and i hope my issue will be an obvious fix :)

Actual behavior
When RUN mkdir /root/.ssh, the command is not interpreted correctly

We havbe the following error

>
INFO[0046] cmd: /bin/sh
INFO[0046] args: [-c mkdir /root/.ssh]
sh: unsupported crypt method: mkdir /root/.ssh
>

Expected behavior
The command mkdir is executed as expected

To Reproduce
Steps to reproduce the behavior:

1. Demo project https://gitlab.com/Sadortun/kaniko-run-issue/-/jobs/99005698

Additional Information

FROM php:alpine as intermediate
WORKDIR /var/www/htnl
RUN mkdir /root/.ssh 
RUN ls -la .

Please provide either the Dockerfile you're trying to build or one that can reproduce this error.

• Build Context
  Please provide or clearly describe any files needed to build the Dockerfile (ADD/COPY commands)
• Kaniko Image (fully qualified with digest)

INFO[0020] Taking snapshot of full filesystem...        
INFO[0046] WORKDIR /var/www/html
INFO[0046] cmd: workdir                                 
INFO[0046] Changed working directory to /var/www/html 
INFO[0046] Creating directory /var/www/html
INFO[0046] No files were changed, appending empty layer to config. No layer added to image. 
INFO[0046] RUN mkdir /root/.ssh                         
INFO[0046] cmd: /bin/sh                                 
INFO[0046] args: [-c mkdir /root/.ssh]                  
sh: unsupported crypt method: mkdir /root/.ssh
Usage: sh [options]

Options:
  -c, --crypt-method METHOD     the crypt method (one of NONE DES MD5 SHA256 SHA512)
  -e, --encrypted               supplied passwords are encrypted
  -h, --help                    display this help message and exit
  -m, --md5                     encrypt the clear text password using
                                the MD5 algorithm
  -R, --root CHROOT_DIR         directory to chroot into
  -s, --sha-rounds              number of SHA rounds for the SHA*
                                crypt algorithms

error building image: error building stage: waiting for process to exit: exit status 2
ERROR: Job failed: command terminated with exit code 1

[cugu]

This is the error message from chpasswd.

[cugu]

The error in the description above does not match with the error in the referenced gitlab job, although it is similar.

INFO[0034] RUN mkdir /root/.ssh                         
INFO[0034] cmd: /bin/sh                                 
INFO[0034] args: [-c mkdir /root/.ssh]                  
--2018-09-18 19:22:18--  http://mkdir%20/root/.ssh
Resolving mkdir ... failed: Name does not resolve.
sh: unable to resolve host address 'mkdir '
error building image: error building stage: waiting for process to exit: exit status 4

[sadortun]

@cugu Indeed, the message from this issue come from a local build attempt, I wanted to reproduce the issue on a public project

Let me know if I can provide any details that you might need. I can also grant you permissions on the test project.

[bouk]

I've run into the same issue. My fix is to just use gcr.io/kaniko-project/executor:v0.3.0 until it's fixed.

[sadortun]

@bouk tested with 0.3.0, and i got the same issue.
https://gitlab.com/Sadortun/kaniko-run-issue/-/jobs/99457320

Can you please share your execution script / Dockerfile ?

[sadortun]

@bouk Done some more tests, and it seems if i use the base image "docker:stable" i can execute commands

https://gitlab.com/Sadortun/kaniko-run-issue/-/jobs/99462747

But i tried other alpine based images, and no success 😢

[bouk]

@sadortun looking at the logs, you're not using v0.3.0: Using Docker executor with image gcr.io/kaniko-project/executor:debug

[cugu]

@bouk It is used in his newer builds: https://gitlab.com/Sadortun/kaniko-run-issue/-/jobs/99492775 but it ends in a Killed

I can reproduce that behavior locally as well.

[sadortun]

@cugu @bouk Indeed, i was dooing 19 things at the same time, and i did not see that i was not commiting on the right branch :)

V0.3.0 doesnt work as expected either.

[sadortun]

@cugu @bouk After more tests, here is an Update on the issue. Any help is greatly appreciated !

Working as expected

FROM nginx:alpine
COPY ./index.html /usr/share/nginx/html/index.html
RUN mkdir /root/.ssh

Working as expected

FROM richarvey/nginx-php-fpm:latest  
COPY ./index.html /usr/share/nginx/html/index.html
RUN ["mkdir", "/root/.ssh"]

NOT Working

FROM richarvey/nginx-php-fpm:latest  
COPY ./index.html /usr/share/nginx/html/index.html
RUN mkdir /root/.ssh

INFO[0013] RUN mkdir /root/.ssh                         
INFO[0013] cmd: /bin/sh                                 
INFO[0013] args: [-c mkdir /root/.ssh]                  
--2018-09-24 23:57:00--  http://mkdir%20/root/.ssh
Resolving mkdir ... failed: Name does not resolve.
sh: unable to resolve host address 'mkdir '

[xanonid]

This is probably a similar issue as https://github.com/GoogleContainerTools/kaniko/issues/359#issuecomment-424044674 . In this case, busybox is not overwritten by GNU tar but by another binary like ping.

[cugu]

Solved by https://github.com/GoogleContainerTools/kaniko/pull/360 for me

[sadortun]

Indeed, fixed by #360

thanks guys!