Initial EMISO Engine

[jmi-reds]

This issue follows activities on the creation on an initial version of the EMISO Engine.

The target is to be able to create an environment from Portainer server (connect with the Smart Object).

Task list:

Rootfs

• [X] Add "curl" and "python-docker": it will use to send commands to EMISO engine for debug/test
• [X] A support of "systemd": simplify the management of the services. It can be used to start/stop dockerd for test purpose.

Webserver

• [X] Basic Restfull web server which respond to GET and POST commands
• [X] Basic commands used by Portnair to connect with environments (cmd list below) / Return default valid message hardcoded massages

Milestone - At this point Portainer Server can connect with a dummy environment

Daemon

• [ ] Answer to the commands sent from the Webserver (dummy answers)
• [ ] Implementation of the real answer to the commands

Milestone - In Portainer Server get the real information from the environment

Here is the list of the commands sent by Portainer during an environment connection:

• [X] _ping
• [X] info
• [X] containers/json
• [x] images/json
• [X] volumes - returns empty value (volumes not handled by emiso)
• [X] networks - returns empty value (networks not handled by emiso)
• [X] version

[jmi-reds]

Here is an example on how to use curl and python to interact with Docker daemon and EMISO webserver.

Get the list of containers

HTTP

curl --unix-socket /var/run/docker.sock http://localhost/containers/json

Python

import docker
client = docker.from_env()
for container in client.containers.list():
  print(container.id)

[jmi-reds]

An initial version of a webserver has been integrated. It works in HTTPS/TLS. Currently it only prints the GET / POST received.

Command example: curl -X GET -k "https://192.168.53.154:8080/images/json"

The code also provides an version based on sockets. It is made for testing.

[jmi-reds]

Just a note about TLS configuration in Portainer: currently, it is not possible to enable TLS with Skip Certification Verification option enabled.

• ref: https://github.com/portainer/portainer/issues/8011