Not able to build node14 image - /bin/sh: permission denied

[sankarbabufk]

Actual behavior
Getting the below error while trying to build node14 image using kaniko executor

RUN npm test
cmd: /bin/sh
args: [-c npm test]
util.Lookup returned: &{Uid:100 Gid:65533 Username:app Name:app HomeDir:/home/app}
performing slow lookup of group ids for app
Running: [/bin/sh -c npm test]
error building image: error building stage: failed to execute command: starting command: fork/exec /bin/sh: permission denied

I am not facing the same issue when i build the same dockerfile using docker in my local machine.

Expected behavior
It should execute the command and show the result as below,

npm test

railinc-parse@1.0.0 test aws_lambda_scripts/railinc-parse
echo "Error: no test specified" && exit 0

Error: no test specified

To Reproduce
Steps to reproduce the behavior:

1. Having the below stage in the jenkins deployment pipeline where we created config.json with auth credential and copy it inside /kaniko/.docker folder

stage("push") {
container('kaniko') {
dir(service){
sh("mkdir -p /kaniko/.docker/")
sh("cp ../config.json /kaniko/.docker/config.json")
sh("/kaniko/executor --cache=true --context=build/$service --destination=${REGISTRY_NAME}/$imageName:$imageTag --verbosity=debug")
}
}
}

Additional Information

• Dockerfile

FROM --platform=${TARGETPLATFORM:-linux/amd64} ghcr.io/openfaas/of-watchdog:0.8.4 as watchdog
FROM --platform=${TARGETPLATFORM:-linux/amd64} node:14-alpine as ship
ARG TARGETPLATFORM
ARG BUILDPLATFORM
COPY --from=watchdog /fwatchdog /usr/bin/fwatchdog
RUN chmod +x /usr/bin/fwatchdog
RUN apk --no-cache add curl ca-certificates
&& addgroup -S app && adduser -S -g app app
# Turn down the verbosity to default level.
ENV NPM_CONFIG_LOGLEVEL warn
RUN chmod 777 /tmp
USER app
RUN mkdir -p /home/app/function
# Wrapper/boot-strapper
WORKDIR /home/app
COPY package.json ./
# This ordering means the npm installation is cached for the outer function handler.
RUN npm i
# Copy outer function handler
COPY index.js ./
# COPY function node packages and install, adding this as a separate
# entry allows caching of npm install
WORKDIR /home/app/function
COPY function/*.json ./
RUN npm i
# COPY function files and folders
COPY function/ ./
# Run any tests that may be available
RUN npm test
# Set correct permissions to use non root user
WORKDIR /home/app/
ENV cgi_headers="true"
ENV fprocess="node index.js"
ENV mode="http"
ENV upstream_url="http://127.0.0.1:3000"
ENV exec_timeout="10s"
ENV write_timeout="15s"
ENV read_timeout="15s"
ENV prefix_logs="false"
HEALTHCHECK --interval=3s CMD [ -e /tmp/.lock ] || exit 1
CMD ["fwatchdog"]

• Build Context
  no dependent files
• Kaniko Image (fully qualified with digest)
  containerTemplate(name: 'kaniko', image: "gcr.io/kaniko-project/executor:debug", ttyEnabled: true, command: "/busybox/cat")

Triage Notes for the Maintainers

Description	Yes/No
Please check if this a new feature you are proposing	No
Please check if the build works in docker but not in kaniko	Yes
Please check if this error is seen when you use --cache flag	Yes
Please check if your dockerfile is a multistage dockerfile	No