docker: executable file not found in $PATH - docker

I have a docker image which installs grunt, but when I try to run it, I get an error:
Error response from daemon: Cannot start container foo_1: \
exec: "grunt serve": executable file not found in $PATH
If I run bash in interactive mode, grunt is available.
What am I doing wrong?
Here is my Dockerfile:
# https://registry.hub.docker.com/u/dockerfile/nodejs/ (builds on ubuntu:14.04)
FROM dockerfile/nodejs
MAINTAINER My Name, me#email.com
ENV HOME /home/web
WORKDIR /home/web/site
RUN useradd web -d /home/web -s /bin/bash -m
RUN npm install -g grunt-cli
RUN npm install -g bower
RUN chown -R web:web /home/web
USER web
RUN git clone https://github.com/repo/site /home/web/site
RUN npm install
RUN bower install --config.interactive=false --allow-root
ENV NODE_ENV development
# Port 9000 for server
# Port 35729 for livereload
EXPOSE 9000 35729
CMD ["grunt"]

This was the first result on google when I pasted my error message, and it's because my arguments were out of order.
The container name has to be after all of the arguments.
Bad:
docker run <container_name> -v $(pwd):/src -it
Good:
docker run -v $(pwd):/src -it <container_name>

When you use the exec format for a command (e.g., CMD ["grunt"], a JSON array with double quotes), it will be executed without a shell. This means that most environment variables will not be present.
If you specify your command as a regular string (e.g. CMD grunt) then the string after CMD will be executed with /bin/sh -c.
More info on this is available in the CMD section of the Dockerfile reference.

I found the same problem. I did the following:
docker run -ti devops -v /tmp:/tmp /bin/bash
When I change it to
docker run -ti -v /tmp:/tmp devops /bin/bash
it works fine.

For some reason, I get that error unless I add the "bash" clarifier. Even adding "#!/bin/bash" to the top of my entrypoint file didn't help.
ENTRYPOINT [ "bash", "entrypoint.sh" ]

There are several possible reasons for an error like this.
In my case, it was due to the executable file (docker-entrypoint.sh from the Ghost blog Dockerfile) lacking the executable file mode after I'd downloaded it.
Solution: chmod +x docker-entrypoint.sh

I had the same problem, After lots of googling, I couldn't find out how to fix it.
Suddenly I noticed my stupid mistake :)
As mentioned in the docs, the last part of docker run is the command you want to run and its arguments after loading up the container.
NOT THE CONTAINER NAME !!!
That was my embarrassing mistake.
Below I provided you with the picture of my command line to see what I have done wrong.
And this is the fix as mentioned in the docs.

A Docker container might be built without a shell (e.g. https://github.com/fluent/fluent-bit-docker-image/issues/19).
In this case, you can copy-in a statically compiled shell and execute it, e.g.
docker create --name temp-busybox busybox:1.31.0
docker cp temp-busybox:/bin/busybox busybox
docker cp busybox mycontainerid:/busybox
docker exec -it mycontainerid /bin/busybox sh

In the error message shown:
Error response from daemon: Cannot start container foo_1: \
exec: "grunt serve": executable file not found in $PATH
It is complaining that it cannot find the executable grunt serve, not that it could not find the executable grunt with the argument serve. The most likely explanation for that specific error is running the command with the json syntax:
[ "grunt serve" ]
in something like your compose file. That's invalid since the json syntax requires you to split up each parameter that would normally be split by the shell on each space for you. E.g.:
[ "grunt", "serve" ]
The other possible way you can get both of those into a single parameter is if you were to quote them into a single arg in your docker run command, e.g.
docker run your_image_name "grunt serve"
and in that case, you need to remove the quotes so it gets passed as separate args to the run command:
docker run your_image_name grunt serve
For others seeing this, the executable file not found means that Linux does not see the binary you are trying to run inside your container with the default $PATH value. That could mean lots of possible causes, here are a few:
Did you remember to include the binary inside your image? If you run a multi-stage image, make sure that binary install is run in the final stage. Run your image with an interactive shell and verify it exists:
docker run -it --rm your_image_name /bin/sh
Your path when shelling into the container may be modified for the interactive shell, particularly if you use bash, so you may need to specify the full path to the binary inside the container, or you may need to update the path in your Dockerfile with:
ENV PATH=$PATH:/custom/dir/bin
The binary may not have execute bits set on it, so you may need to make it executable. Do that with chmod:
RUN chmod 755 /custom/dir/bin/executable
The binary may include dynamically linked libraries that do not exist inside the image. You can use ldd to see the list of dynamically linked libraries. A common reason for this is compiling with glibc (most Linux environments) and running with musl (provided by Alpine):
ldd /path/to/executable
If you run the image with a volume, that volume can overlay the directory where the executable exists in your image. Volumes do not merge with the image, they get mounted in the filesystem tree same as any other Linux filesystem mount. That means files from the parent filesystem at the mount point are no longer visible. (Note that named volumes are initialized by docker from the image content, but this only happens when the named volume is empty.) So the fix is to not mount volumes on top of paths where you have executables you want to run from the image.
If you run a binary for a different platform, and haven't configured binfmt_misc with the --fix-binary option, qemu will be looking for the interpreter inside the container filesystem namespace instead of the host filesystem. See this Ubuntu bug report for more details on this issue.
If the error is from a shell script, the issue is often with the first line of that script (e.g. the #!/bin/bash). Either the command doesn't exist inside the image for a reason above, or the file is not saved as ascii or utf8 with Linux linefeeds. You can attempt dos2unix to fix the linefeeds, or check your git and editor settings.

in my case i order params wrong move all switchs before image name

I got this error message, when I was building alpine base image :
ERROR: for web Cannot start service web: OCI runtime create failed: container_linux.go:380: starting container process caused: exec: "bash": executable file not found in $PATH: unknown
In my docker-compose file, I had the command directive in which executing command using bash and bash does not come with alpine base image.
command: bash -c "python manage.py runserver 0.0.0.0:8000"
Then I realized and executed command using sh (shell).
It worked for me.

problem is glibc, which is not part of apline base iamge.
After adding it worked for me :)
Here are the steps to get the glibc
apk --no-cache add ca-certificates wget
wget -q -O /etc/apk/keys/sgerrand.rsa.pub https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub
wget https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.28-r0/glibc-2.28-r0.apk
apk add glibc-2.28-r0.apk

Refering to the title.
My mistake was to put variables via --env-file during docker run. Among others the file consisted of a PATH extension: PATH=$PATH:something, which caused PATH var look literally like PATH=$PATH:something (var resolution hadn't been performed) instead of PATH:/usr/bin...:something.
I couldn't make the resolution work through --env-file, so the only way I see this working is by using ENV in Dockerfile.

I ran into this issue using docker-compose. None of the solutions here or on this related question resolved my issue. Ultimately what worked for me was clearing all cached docker artifacts with docker prune -a and restarting docker.

to make it work add soft reference to /usr/bin:
ln -s $(which node) /usr/bin/node
ln -s $(which npm) /usr/bin/npm

Related

Cypress in docker can't find cypress.json file

I'm struggling with testing my app with my Cypress with docker, I use the dedicated docker image with this command : docker run -it -v $PWD:/e2e -w /e2e cypress/included:8.7.0
I have ALWAYS this error when I launch it : `Could not find a Cypress configuration file, exiting.
We looked but did not find a default config file in this folder: /e2e`
Meaning that cypress can't find the cypress.json but it is precisely in the dedicated folder, here is my directory/file tree :
pace
front
cypress
cypress.json
So this is a standard file tree for e2e testing, and despite all of my tricks (not using $PWD but using full directory path, reinstall docker, colima engine etc. nothings works, and if I run npm run cypress locally everything works just fine !
Needless to say that I am in the /pace/front directory when I'm trying these commands
Can you help me please ?
The -v $PWD:/e2e is a docker instruction to mount a volume (a bind mount). It mounts the current directory to /e2e inside the docker container at runtime.
In the docs it mention a structure where it expects the cypress.json file to end up directly under /e2e. To get it do be like this you have to do either:
-v $PWD/pace/front:/e2e
run the command from inside the pace/front directory
Since the CMD and ENTRYPOINT commands in docker run from the WORKDIR you could also try running it from where you were but changing the workdir as:
-w /e2e/pace/front
I have not seen their dockerfile, but my assumption is that that would work.
My personal choice would be to just run it from pace/front

how to use a executable file created in a docker file in the same docker file

What I want: i want to run a cpp file witch use opencv inside a container
What I've done:
installing an image of opencv:
docker pull spmallick/opencv-docker:opencv
create a docker file
FROM spmallick/opencv-docker:opencv
RUN ["g++ a.cpp -o a.out"]
COPY . .
CMD ["./a.out"]
bash command
sudo docker build -t project_opencv
OCI runtime create failed: container_linux.go:349: starting container process caused "exec: "g++ a.cpp -o a.out": executable file not found in $PATH": unknown
first I try this with cmd instead of RUN (how to use cmd inside a Dockerfile to compile a file). It couldn't find a.out although I've done COPY . .
Now it seems that there is a problem to create a.out
When you use the JSON-array form of RUN (or CMD or ENTRYPOINT), you explicitly provide the set of "words" that make up the command. As you've shown it, it is a single word, and Docker tries to run it as such, including the spaces in the command name it's looking up. You need to split it into its constituent words yourself.
RUN ["g++", "a.cpp", "-o", "a.out"]
The reverse side of this is that there is no splitting, expansion, or interpolation that happens in this command:
# Preserves both the literal $ and the spaces
RUN ["cp", "dollars-word-$word.txt", "file name with spaces.txt"]
Especially for RUN it's common to use the shell form. This wraps the command in sh -c so it works like an ordinary command. (There are technical reasons you might not want this for CMD and especially ENTRYPOINT.)
RUN g++ a.cpp -o a.out
RUN cp dollars-word-\$word.txt, 'file name with spaces.txt'
RUN tail env-var-$word.txt
First copy your a.cpp into docker image then your RUN command will work , I am not sure about your RUN ["g++ a.cpp -o a.out"] command this will work or not but try this:
FROM spmallick/opencv-docker:opencv
COPY . .
RUN ["g++ a.cpp -o a.out"]
CMD ["./a.out"]
I think you need to check the permissions for the files you have copied, from your host machine into the container.
You could also check the directory you are in, and if you need to change the directory, then you can use the WORKDIR command in your Dockerfile.
It would also be useful to start a bash session in the container, and run the commands manually. For each successful command, you can enter the command into the Dockerfile, or if you encounter an error, you can also troubleshoot more easily, rather than change the Dockerfile each time and run, and if you need to debug which is time consuming.

Docker ROS automatic start of launch file

I developed a few ROS packages and I want to put the packages in a docker container because installing all the ROS packages all the time is tedious. Therefore I created a dockerfile that uses a base ROS image, installed all the necessary dependencies, copied my workspace, built the workspace in the docker container and sourced everything afterward. You can find the docker file here:
FROM ros:kinetic-ros-base
RUN apt-get update && apt-get install locales
RUN locale-gen en_US.UTF-8
ENV LANG en_US.UTF-8
RUN apt-get update && apt-get install -y \
&& rm -rf /var/likb/apt/lists/*
COPY . /catkin_ws/src/
WORKDIR /catkin_ws
RUN /bin/bash -c '. /opt/ros/kinetic/setup.bash; catkin_make'
RUN /bin/bash -c '. /opt/ros/kinetic/setup.bash; source devel/setup.bash'
CMD ["roslaunch", "master_launch sim_perception.launch"]
The problem is: When I run the docker container wit the "run" command, docker doesn't seem to know that I sourced my new ROS workspace and therefore it cannot launch automatically my launch script. If I run the docker container as bash script with "run -it bash" I can source my workspace again and then roslaunch my .launch file.
So can someone tell me how to write my dockerfile correctly so I launch my .launch file automatically when I run the container? Thanks!
From Docker Docs
Each RUN instruction is run independently and won't effect next instruction so when you run last Line no PATH are saved from ROS.
You need Source .bashrc or every environment you need using source first.
You can wrap everything you want (source command and roslaunch command) inside a sh file then just run that file at the end
If you review the convention of ros_entrypoint.sh you can see how best to source the workspace you would like in the docker. We're all so busy learning how to make docker and ros do the real things, it's easy to skip over some of the nuance of this interplay. This sucked forever for me; hope this is helpful for you.
I looked forever and found what seemed like only bad advice, and in the absence of an explicit standard or clear guidance I've settled into what seems like a sane approach that also allows you to control what launches at runtime with environment variables. I now consider this as the right solution for my needs.
In the Dockerfile for the image you want to set the start/launch behavior;
towards the end; you should use ADD line to insert your own ros_entrypoint.sh (example included); Set it as the ENTRYPOINT and then a CMD to run by default run something when the docker start.
note: you'll (obviously?) need to run the docker build process for these changes to be effective
Dockerfile looks like this:
all your other dockerfile ^^
.....
# towards the end
COPY ./ros_entrypoint.sh /
ENTRYPOINT ["/ros_entrypoint.sh"]
CMD ["bash"]
Example ros_entryppoint.sh:
#!/bin/bash
set -e
# setup ros environment
if [ -z "${SETUP}" ]; then
# basic ros environment
source "/opt/ros/$ROS_DISTRO/setup.bash"
else
#from environment variable; should be a absolute path to the appropriate workspaces's setup.bash
source $SETUP
fi
exec "$#"
Used in this way the docker will automatically source either the basic ros bits... or if you provide another workspace's setup.bash path in the $SETUP environment variable, it will be used in the container.
So a few ways to work with this:
From the command line prior to running docker
export SETUP=/absolute/path/to/the/setup.bash
docker run -it your-docker-image
From the command line (inline)
docker run --env SETUP=/absolute/path/to/the/setup.bash your-docker-image
From docker-compose
service-name:
network_mode: host
environment:
- SETUP=/absolute/path/to/the_workspace/devel/setup.bash #or whatever
command: roslaunch package_name launchfile_that_needed_to_be_sourced.launch
#command: /bin/bash # wake up and do something else

How to execute start script in Dockerfile

I want to create new image from jdk, build it, it works; when I run my new imag, it return container id, but can't get the process-info when docker ps,this is my dockerfile:
# specified jdk version
FROM openjdk:7-jre
# env
ENV APP_HOME /usr/src/KOAL-OCSP
ENV PATH $APP_HOME:$PATH
# copy my app in .zip to /usr/src
COPY myapp.zip /usr/src/
# unzip copy file
RUN unzip /usr/src/myapp.zip
WORKDIR $APP_HOME
#port
expose 80
#run the setup script of my app when start container
CMD ["service.sh" "start"]
service.sh is a setup script is my app root-file, I wish the script can auto execuced when run the new self-build image.
I suspect that the container has executed and exited successfully. The container will stay alive as long as the processes that you have started using the services.sh script is still running.
In your case, the services.sh has executed and exited, thus causing the container to exit.
To view all containers, use docker ps -a
Update:
The error /bin/sh: 1: ./service.sh: not found indicates that the services.sh script is not found under $APP_HOME inside the Docker image. Make sure you add it under $APP_HOME using
ADD `service.sh` $APP_HOME
CMD ["service.sh" "start"]
The above is not valid json, it's missing a comma in the the array, so docker will execute it as a string which will fail since ["service.sh" will not be found as a command to run.
If you use docker ps -a you will see a list of all containers, including exited ones. From there, you can use docker logs $(docker ps -lq) to see the logs of the last container you tried to run. And you can docker inspect $(docker ps -lq) to see all the details about the last container it tried to run, including the exit code.
To get past your current error, correct your syntax with the missing comma:
CMD ["service.sh", "start"]
For the next problem you are seeing, a "not found" error can indicate:
The command doesn't exist inside your container (at the expected location). In your scenario, make sure it is included in /usr/src/KOAL-OCSP that you unzip in your image.
The shell script does exist, but calls a binary on the first line that doesn't exist in your image. E.g. if you call #!/bin/bash but only have /bin/sh in your container. This also happens when you edit the files on a Windows system and have ^M linefeeds that become part of the name of the binary that the container is looking for (/bin/sh^M instead of /bin/sh).
For binaries, this can happen if executable you are running has library dependencies that do not exist inside your container. For example, if you build on a glibc environment and run the container with a musl libc environment of Alpine, this same error message will appear.

docker build how to run intermediate containers with centos:systemd

I am trying to build a docker image that is based on centos:systemd. In my Dockerfile I am running a command that depends on systemd running, this fails with the following error:
Failed to get D-Bus connection: Operation not permitted
error: %pre(mod-php-7.1-apache2-zend-server-7.1.7-16.x86_64) scriptlet failed, exit status 1
Error in PREIN scriptlet in rpm package mod-php-7.1-apache2-zend-server-7.1.7-16.x86_64
how can I get the intermediate containers to run with --privileged and mapping -v /sys/fs/cgroup:/sys/fs/cgroup:ro ?
If I comment out the installer and just run the container and manually execute the installer it works fine.
Here is the Dockerfile
FROM centos/systemd
COPY ./ZendServer-9.1.0-RepositoryInstaller-linux.tar.gz /opt
RUN tar -xvf /opt/ZendServer-9.1.0-RepositoryInstaller-linux.tar.gz -C /opt/
RUN /opt/ZendServer-RepositoryInstaller-linux/install_zs.sh 7.1 java --automatic
If your installer needs systemd running, I think you will need to launch a container with the base centos/systemd image, manually run the commands, and then save the result using docker commit. The base image ENTRYPOINT and CMD are not run while child images are getting built, but they do run if you launch a container and make your changes. After manually executing the installer, run docker commit {my_intermediate_container} {my_image}:{my_version}, replacing the bits in curly braces with the container name/hash, your desired image name, and image version.
You might also be able to change your Dockerfile to launch init before running your installer. I am not sure if that will work here in the context of building an image, but that would look like:
FROM centos/systemd
COPY ./ZendServer-9.1.0-RepositoryInstaller-linux.tar.gz /opt
RUN tar -xvf /opt/ZendServer-9.1.0-RepositoryInstaller-linux.tar.gz -C /opt/ \
&& /usr/sbin/init \
&& /opt/ZendServer-RepositoryInstaller-linux/install_zs.sh 7.1 java --automatic
A LAMP stack inside a docker container does not need systemd - I have made to work with the docker-systemctl-replacement script. It is able to start and stop a service according to what's written in the *.service file. You could try it with what the ZendServer is normally doing outside a docker container.

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