Failure to Get started with Coral Dev Board and Python (balena push - unsigned repo)

Trying out Balena OS on by Google Coral Dev Board, going through the tutorial here: Get started with Coral Dev Board and Python - Balena Documentation

Unfortunately, I’m unable to push the python example referenced in the tutorial. More information about the failure can be found in the github issue:

I’m able to push the node example just fine, but that’s not what I need :stuck_out_tongue:

Any thoughts?

Hello Daniel,
Thanks for reporting this issue and eventually helping to fix this as well. Your contribution is greatly appreciated. I have approved your PR and it’s good to go now. Please let us know if this resolved your issue.


The solution builds, but I’m not seeing the result output as indicated in the tutorial:

21.04.20 09:48:10 (+0200)  edge-logic  ---------------------------
21.04.20 09:48:10 (+0200)  edge-logic  macaw
21.04.20 09:48:10 (+0200)  edge-logic  Score :  0.99609375

I may not be looking in the right place, but in the summary tab of my device, I get no output from the edge-logic service, despite trying to stop & start or restart that service.

@dt1900 could you please share what you see on your logs? is the service running? or not started?

Local terminal:

$ balena push {fleet}
[Warn] Node.js version "14.19.1" does not satisfy requirement ">=12.8.0 <13.0.0"
[Warn] This may cause unexpected behavior.
[Info]        Starting build for {fleet}, user {name}
[Info]        Dashboard link:
[Info]        Building on arm06
[Info]        Pulling previous images for caching purposes...
[Success]     Successfully pulled cache images
[edge-logic]  Step 1/10 : FROM balenalib/coral-dev-debian:latest
[model]       Step 1/3 : FROM balenalib/coral-dev-debian
[edge-logic]   ---> 664ecf7af092
[edge-logic]  Step 2/10 : RUN curl | sudo apt-key add -
[edge-logic]   ---> Running in 94e3d57519b2
[model]        ---> 664ecf7af092
[model]       Step 2/3 : COPY . .
[edge-logic]  Here are a few details about this Docker image (For more information please visit
[edge-logic]  Architecture: ARM v8
[edge-logic]  OS: Debian Buster
[edge-logic]  Variant: run variant
[edge-logic]  Default variable(s): UDEV=off
[edge-logic]  Extra features:
[edge-logic]  - Easy way to install packages with `install_packages <package-name>` command
[edge-logic]  - Run anywhere with cross-build feature  (for ARM only)
[edge-logic]  - Keep the container idling with `balena-idle` command
[edge-logic]  - Show base image details with `balena-info` command
[edge-logic]    % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
[edge-logic]                                   Dload  Upload   Total   Spent    Left  Speed
[edge-logic]       0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
[edge-logic]  Warning: apt-key output should not be parsed (stdout is not a terminal)
100  2537  100  2537    0     0   9093      0 --:--:-- --:--:-- --:--:--  9093
[model]        ---> 3da5024275fd
[model]       Step 3/3 : CMD ["bash",""]
[model]        ---> Running in f6b27adac1fe
[edge-logic]  OK
[model]       Removing intermediate container f6b27adac1fe
[model]        ---> db5520bdfd3f
[model]       Successfully built db5520bdfd3f
[edge-logic]  Removing intermediate container 94e3d57519b2
[edge-logic]   ---> 05c4a2a5f2f3
[edge-logic]  Step 3/10 : RUN install_packages python3-pip
[edge-logic]   ---> Running in 4eaf93a1f5ab
[edge-logic]  Reading package lists...
[edge-logic]  Building dependency tree...
[edge-logic]  Reading state information...
[edge-logic]  The following package was automatically installed and is no longer required:
[edge-logic]    libidn11
[edge-logic]  Use 'apt autoremove' to remove it.
[edge-logic]  The following additional packages will be installed:
[edge-logic]    python-pip-whl python3-distutils python3-lib2to3
[edge-logic]  Recommended packages:
[edge-logic]    build-essential python3-dev python3-setuptools python3-wheel
[edge-logic]  The following NEW packages will be installed:
[edge-logic]    python-pip-whl python3-distutils python3-lib2to3 python3-pip
[edge-logic]  0 upgraded, 4 newly installed, 0 to remove and 52 not upgraded.
[edge-logic]  Need to get 1980 kB of archives.
[edge-logic]  After this operation, 3772 kB of additional disk space will be used.
[edge-logic]  Get:1 buster/main arm64 python-pip-whl all 18.1-5 [1591 kB]
[edge-logic]  Get:2 buster/main arm64 python3-lib2to3 all 3.7.3-1 [76.7 kB]
[edge-logic]  Get:3 buster/main arm64 python3-distutils all 3.7.3-1 [142 kB]
[edge-logic]  Get:4 buster/main arm64 python3-pip all 18.1-5 [171 kB]
[edge-logic]  debconf: delaying package configuration, since apt-utils is not installed
[edge-logic]  Fetched 1980 kB in 0s (6934 kB/s)
[edge-logic]  Selecting previously unselected package python-pip-whl.
[edge-logic]  (Reading database ...
(Reading database ... 75%tabase ... 5%
[edge-logic]  (Reading database ... 80%
[edge-logic]  (Reading database ... 85%
[edge-logic]  (Reading database ... 90%
[edge-logic]  (Reading database ... 95%
(Reading database ... 11395 files and directories currently installed.)
[edge-logic]  Preparing to unpack .../python-pip-whl_18.1-5_all.deb ...
[edge-logic]  Unpacking python-pip-whl (18.1-5) ...
[edge-logic]  Selecting previously unselected package python3-lib2to3.
[edge-logic]  Preparing to unpack .../python3-lib2to3_3.7.3-1_all.deb ...
[edge-logic]  Unpacking python3-lib2to3 (3.7.3-1) ...
[edge-logic]  Selecting previously unselected package python3-distutils.
[edge-logic]  Preparing to unpack .../python3-distutils_3.7.3-1_all.deb ...
[edge-logic]  Unpacking python3-distutils (3.7.3-1) ...
[edge-logic]  Selecting previously unselected package python3-pip.
[edge-logic]  Preparing to unpack .../python3-pip_18.1-5_all.deb ...
[edge-logic]  Unpacking python3-pip (18.1-5) ...
[edge-logic]  Setting up python-pip-whl (18.1-5) ...
[edge-logic]  Setting up python3-lib2to3 (3.7.3-1) ...
[edge-logic]  Setting up python3-distutils (3.7.3-1) ...
[edge-logic]  Setting up python3-pip (18.1-5) ...
[edge-logic]  Removing intermediate container 4eaf93a1f5ab
[edge-logic]   ---> 9ae7fc6edc6e
[edge-logic]  Step 4/10 : ENV UDEV=1
[edge-logic]   ---> Running in b6bc35b0cac3
[edge-logic]  Removing intermediate container b6bc35b0cac3
[edge-logic]   ---> 17845a30bae6
[edge-logic]  Step 5/10 : COPY 99-tpu.rules /etc/udev/rules.d/99-tpu.rules
[edge-logic]   ---> 6191069f19ee
[edge-logic]  Step 6/10 : WORKDIR /usr/src/app
[edge-logic]   ---> Running in ef0a62c030fb
[edge-logic]  Removing intermediate container ef0a62c030fb
[edge-logic]   ---> a05680f67e66
[edge-logic]  Step 7/10 : COPY src src
[edge-logic]   ---> 16d8fc8537f3
[edge-logic]  Step 8/10 : COPY images images
[edge-logic]   ---> 8b07d4568658
[edge-logic]  Step 9/10 : COPY
[edge-logic]   ---> 24be0b0d4b6c
[edge-logic]  Step 10/10 : CMD ["bash",""]
[edge-logic]   ---> Running in 7128aa673481
[edge-logic]  Removing intermediate container 7128aa673481
[edge-logic]   ---> 44b8277cc790
[edge-logic]  Successfully built 44b8277cc790
[Info]        Generating image deltas from release 0de381bce6b48a65587650682db6decd (id: 2125283)
[Success]     Successfully generated image deltas
[Info]        Uploading images
[Success]     Successfully uploaded images
[Info]        Built on arm06
[Success]     Release successfully created!
[Info]        Release: 32786f02795741f98be320aeb8c0f84b (id: 2125948)
[Info]        β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”¬β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”
[Info]        β”‚ Service    β”‚ Image Size β”‚ Delta Size β”‚ Build Time           β”‚
[Info]        β”œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”Όβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”Όβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”Όβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€
[Info]        β”‚ edge-logic β”‚ 222.39 MB  β”‚ 15.35 MB   β”‚ 1 minute, 11 seconds β”‚
[Info]        β”œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”Όβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”Όβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”Όβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€
[Info]        β”‚ model      β”‚ 219.94 MB  β”‚ 3.89 MB    β”‚ 27 seconds           β”‚
[Info]        β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”΄β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”΄β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”΄β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜
[Info]        Build finished in 5 minutes, 42 seconds
			    _.-(6'  \
			   (=___._/` \
			        )  \ |
			       /   / |
			      /    > /
			     j    < _\
			 _.-' :      ``.
			 \ r=._\        `.
			<`\\_  \         .`-.
			 \ r-7  `-. ._  ' .  `\
			  \`,      `-.`7  7)   )
			   \/         \|  \'  / `-._
			              ||    .'
			               \\  (
			                >\  >
			            ,.-' >.'

Dashboard Logs (post reboot after re-deployment):

Supervisor starting
Starting service 'model sha256:db5520bdfd3f35467fb1cbb8f59d431845dcbc1a457e22ffb4bb434d8121da16'
Started service 'model sha256:db5520bdfd3f35467fb1cbb8f59d431845dcbc1a457e22ffb4bb434d8121da16'
 model  Copying Model to shared volume...
 model  'model.tflite' -> 'shared-model/model.tflite'
 model  'labels.txt' -> 'shared-model/labels.txt'

There are no logs for edge-logic service. It is listed as downloaded and can be started, stopped, or restarted.

From what I can tell, the model service runs to the point that it copies the models but edge-logic does not run successfully.

I’m still hacking around on this. in altering the docker-compose.yml file to remove nearly all attributes that differ from the model service, the edge-logic service did run. However, I’m sure some of those attributes are needed, so I’m re-adding them one-by-one :cry:

It seems that the:

      - model

parameter in docker-compose.yml was the culprit.

I’ve submitted a pull request that also updates the sample to correspond with the current version of the Google Coral classify_image example here: pycoral/ at master Β· google-coral/pycoral Β· GitHub

Hello @dt1900 just to confirm.

Is that correct? did i understand properly?

if not, could you please share more Dashboard logs? could you please check the Diagnostics from your device and share the results?


Hi Marc,

That’s not quite correct…

      - model

parameter from docker-compose.yml, the edge-logic service would execute with logs displaying in the dashboard.

From my standpoint, I’ve solved this issue on my own, but did want to point out that the depends_on: parameter was causing issues. I’m not super experienced with docker, so I don’t have an explanation for what/why that is this case.

1 Like

Hello @dt1900, just following up here. The depends_on merely starts the containers in a predefined order. In this case, the edge-logic service won’t start unless the model service has already started. This is so the model service can copy the models first. I also see that edge-logic is not producing any output, but was able to easily solve that by idling the model service after it has finished copying. Thanks for submitting your pull request though - I’ll take a look at it and post any comments regarding it there.