voxl-emulator won't start

jaredjohansen

I have an Ubuntu 20.04 machine with docker installed.

I have followed these instructions to install voxl-docker.

I have downloaded the latest voxl-cross, voxl-emulator, and voxl-hexagon from here. I have used docker load to create docker images from each of these tar.gz files.

When I try to run the emulator, it gives me the error below:

jared@jared-ubuntu:~/voxl-docker$ docker images 
REPOSITORY          TAG       IMAGE ID       CREATED          SIZE
voxl-hexagon        v1.1      f5790a3358ca   19 minutes ago   6.38GB
voxl-emulator       v1.7      c0709663abe6   20 minutes ago   3.4GB
voxl-cross          v1.1      77eda1fa0a0e   21 minutes ago   1.06GB
roskinetic-xenial   v1.0      bfb82886c74f   21 months ago    1.63GB
registry            0.9.1     56cfd79a53f5   5 years ago      423MB
jared@jared-ubuntu:~/voxl-docker$ voxl-docker -i voxl-emulator:v1.7 -e "/bin/bash"
launching image: voxl-emulator:v1.7 with the following command:
docker run --rm -it --net=host --privileged -w /home/jared --volume=/dev/bus/usb:/dev/bus/usb -e LOCAL_USER_ID=0 -e LOCAL_USER_NAME=root -e LOCAL_GID=0 -v /home/jared/voxl-docker:/home/root:rw -w /home/root voxl-emulator:v1.7 /bin/bash

docker: Error response from daemon: OCI runtime create failed: container_linux.go:380: starting container process caused: exec: "/bin/bash": stat /bin/bash: no such file or directory: unknown.

As I understand it, It's telling me that there is no such thing as /bin/bash in the container. I don't really believe that is true, because this webpage uses the bash command: voxl-docker -i voxl-emulator -e "/bin/bash build.sh".

Can you help me understand what I am doing wrong (and why this is not working)?

===============

What I am trying to (eventually) do is to build my own docker image (in Ubuntu) that I can adb push to my VOXL and run it there. As I understand it, if I docker build <path_to_my_own_dockerfile> on my Ubuntu machine, once I transfer it to the VOXL, it won't work because the architecture is not the same.

If I want to docker build on my Ubuntu machine and have it work on the VOXL, I believe I will need to run the voxl-emulator and docker build inside of that. Is that correct?

jaredjohansen

This post is deleted!

jaredjohansen

Update: I completely removed docker and voxl-docker from my system.

I rebooted, reinstalled docker, and followed these steps to install voxl-docker.

Now, I get a different error (same as here) :

jared@jared-ubuntu:~/voxl-docker$ voxl-docker -i voxl-emulator -e "/bin/bash"
launching image: voxl-emulator with the following command:
docker run --rm -it --net=host --privileged -w /home/jared --volume=/dev/bus/usb:/dev/bus/usb -e LOCAL_USER_ID=0 -e LOCAL_USER_NAME=root -e LOCAL_GID=0 -v /home/jared/voxl-docker:/home/root:rw -w /home/root voxl-emulator /bin/bash

standard_init_linux.go:228: exec user process caused: exec format error

I followed the instructions at the link. The first two commands ran without any issues. I had to modify the last one to fit my architecture:

sudo apt-get install qemu binfmt-support qemu-user-static
docker run --rm --privileged multiarch/qemu-user-static --reset -p yes

jared@jared-ubuntu:~/voxl-docker$ docker run --rm -t amd64/ubuntu uname -m
Unable to find image 'amd64/ubuntu:latest' locally
latest: Pulling from amd64/ubuntu
7b1a6ab2e44d: Pull complete 
Digest: sha256:7cc0576c7c0ec2384de5cbf245f41567e922aab1b075f3e8ad565f508032df17
Status: Downloaded newer image for amd64/ubuntu:latest
x86_64

That worked. Now the voxl-emulator appears to work too:

jared@jared-ubuntu:~/voxl-docker$ voxl-docker -i voxl-emulator -e "/bin/bash"
launching image: voxl-emulator with the following command:
docker run --rm -it --net=host --privileged -w /home/jared --volume=/dev/bus/usb:/dev/bus/usb -e LOCAL_USER_ID=0 -e LOCAL_USER_NAME=root -e LOCAL_GID=0 -v /home/jared/voxl-docker:/home/root:rw -w /home/root voxl-emulator /bin/bash

+ USER_ID=0
+ USER_NAME=root
+ GID=0
+ getent group 0
root:x:0:
+ echo 'Starting with UID : 0'
Starting with UID : 0
+ useradd --shell /bin/bash -u 0 -g 0 -o -c '' -M root
useradd: user 'root' already exists
+ addgroup root users
+ export HOME=/home/root
+ HOME=/home/root
+ ls -ld /home/root
drwxrwxr-x 8 james host_group 4096 Nov  1 21:45 /home/root
+ echo 'root ALL=(ALL) NOPASSWD: ALL'
+ ls -l /etc/sudoers.d/
total 8
-rw-r--r-- 1 root root 30 Nov 23  2020 james
-rw-r--r-- 1 root root 29 Nov  1 22:26 root
+ cat /etc/sudoers.d/root
root ALL=(ALL) NOPASSWD: ALL
+ chmod 777 /tmp
+ chmod 711 /usr/bin/sudo
+ chmod +s /usr/bin/sudo
+ ls -l /usr/local/bin/su-exec
-rwxr-xr-x 1 root root 7660 Aug 14  2018 /usr/local/bin/su-exec
+ ls -l /bin/bash
-rwxrwxrwx 1 root root 959344 Aug 12  2018 /bin/bash
+ echo 'exec /usr/local/bin/su-exec root /bin/bash'
exec /usr/local/bin/su-exec root /bin/bash
+ exec /usr/local/bin/su-exec root /bin/bash
bash-4.3#