docker
CNAB bundle name must be lowercase?
Description
In the CNAB Identifying Metadata section it states that name MUST contain only characters from the Unicode graphic characters. and The Unicode graphic character set allowed for name includes letters, numbers, punctuation, symbols, and spaces; it does not include newlines or tabs.
However, I observed that docker-app is enforcing a requirement for the CNAB bundle name to be lowercase.
Steps to reproduce the issue:
Using the following docker-app definition:
version: 0.1.0
name: Ubuntu
description: Ubuntu 18.04 Container
---
version: '3.2'
services:
ubuntu:
image: ubuntu:18.04
restart: always
tty: true
---
Run docker-app render on the above file.
Describe the results you received:
When I attempted to render the above definition, I received this error:
Error: image name "Ubuntu:0.1.0-invoc" is invalid, please check name and version fields: invalid reference format: repository name must be lowercase
Describe the results you expected:
docker-app would render a docker-compose file.
Additional information you deem important (e.g. issue happens only occasionally):
Perhaps there is a good reason docker-app enforces this rule, but I'd like to understand why (so I can document it).
Output of docker version:
Docker version 19.03.2-ce, build 6a30dfca03
Output of docker app version:
docker-app version v0.8.0, build 7eea32b7
Output of docker info:
Client:
Debug Mode: false
Server:
Containers: 2
Running: 2
Paused: 0
Stopped: 0
Images: 11
Server Version: 19.03.2-ce
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: fd103cb716352c7e19768e4fed057f71d68902a0.m
runc version: 425e105d5a03fabd737a126ad93d62a9eeede87f-dirty
init version: fec3683-dirty (expected: fec3683b971d9)
Kernel Version: 5.0.21-lmp-standard
Operating System: Linux-microPlatform 3.0-50
OSType: linux
Architecture: x86_64
CPUs: 4
Total Memory: 15.51GiB
Name: intel-corei7-64
ID: 7TRC:OKJZ:REIM:ROKL:RZH6:OJL5:DDHE:ML4B:G2CR:CEUD:T6VL:ATXV
Docker Root Dir: /var/lib/docker
Debug Mode: false
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
127.0.0.0/8
Live Restore Enabled: false
@EmbeddedAndroid thanks for reporting this.
Docker App is not enforcing this but docker is, a docker image name cannot have uppercase letters.
When you run render we create the invocation image and run render inside it. We take the name of the image from the metadata (Ubuntu in your case), hence the error.
We'll take a look at this and figure out what we want to do in this case, the most straightforward thing to do would be to take the name of the application and make it compatible with docker.
@rumpl Thanks for the explanation, now it makes sense to me.
I will document this behavior for our users so they don't stumble over this for now. Thanks for the great work on docker-apps!
P.S. We've added support to deliver docker-apps via theupdateframework on embedded devices. If you curious, we did some live demos on youtube here: https://www.youtube.com/watch?v=2k73RVpbjjw
Awesome, thanks for sharing this! Would you be interested in a ~1h session with us so that we can show you what's coming in the future? Would love to have some feedback too.
Awesome, thanks for sharing this! Would you be interested in a ~1h session with us so that we can show you what's coming in the future? Would love to have some feedback too.
No problem at all!
I would be very interested in having a session, would i be able to invite a few engineers my from team as well? Drop me an email at [email protected] and we can go from there!