ns8-coder

This is a template module for NethServer 8. To start a new module from it:

1. Click on Use this template. Name your repo with ns8- prefix (e.g. ns8-mymodule). Do not end your module name with a number, like ns8-baaad2!

2. Clone the repository, enter the cloned directory and configure your GIT identity

3. Rename some references inside the repo:

   modulename=$(basename $(pwd) | sed 's/^ns8-//') &&
   git mv imageroot/systemd/user/coder.service imageroot/systemd/user/${modulename}.service &&
   git mv imageroot/systemd/user/coder-app.service imageroot/systemd/user/${modulename}-app.service && 
   git mv tests/coder.robot tests/${modulename}.robot &&
   sed -i "s/coder/${modulename}/g" $(find .github/ * -type f) &&
   git commit -a -m "Repository initialization"
   

4. Edit this README.md file, by replacing this section with your module description

5. Adjust .github/workflows to your needs. clean-registry.yml might need the proper list of image names to work correctly. Unused workflows can be disabled from the GitHub Actions interface.

6. Commit and push your local changes

Install

Instantiate the module with:

add-module ghcr.io/compgeniuses/coder:latest 1

The output of the command will return the instance name. Output example:

{"module_id": "coder1", "image_name": "coder", "image_url": "ghcr.io/compgeniuses/coder:latest"}

Configure

Let's assume that the mattermost instance is named coder1.

Launch configure-module, by setting the following parameters:

• host: a fully qualified domain name for the application
• http2https: enable or disable HTTP to HTTPS redirection (true/false)
• lets_encrypt: enable or disable Let's Encrypt certificate (true/false)

Example:

api-cli run configure-module --agent module/coder1 --data - <<EOF
{
  "host": "coder.domain.com",
  "http2https": true,
  "lets_encrypt": false
}
EOF

The above command will:

• start and configure the coder instance
• configure a virtual host for trafik to access the instance

Get the configuration

You can retrieve the configuration with

api-cli run get-configuration --agent module/coder1

Uninstall

To uninstall the instance:

remove-module --no-preserve coder1

Update

To Update the instance:

api-cli run update-module --data '{"module_url":"ghcr.io/compgeniuses/coder:latest","instances":["coder1"],"force":true}'

Smarthost setting discovery

Some configuration settings, like the smarthost setup, are not part of the configure-module action input: they are discovered by looking at some Redis keys. To ensure the module is always up-to-date with the centralized smarthost setup every time coder starts, the command bin/discover-smarthost runs and refreshes the state/smarthost.env file with fresh values from Redis.

Furthermore if smarthost setup is changed when coder is already running, the event handler events/smarthost-changed/10reload_services restarts the main module service.

See also the systemd/user/coder.service file.

This setting discovery is just an example to understand how the module is expected to work: it can be rewritten or discarded completely.

Debug

some CLI are needed to debug

• The module runs under an agent that initiate a lot of environment variables (in /home/coder1/.config/state), it could be nice to verify them on the root terminal

  runagent -m coder1 env

• you can become runagent for testing scripts and initiate all environment variables

  runagent -m coder1

the path become :

    echo $PATH
    /home/coder1/.config/bin:/usr/local/agent/pyenv/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/usr/

• if you want to debug a container or see environment inside runagent -m coder1

podman ps
CONTAINER ID  IMAGE                                      COMMAND               CREATED        STATUS        PORTS                    NAMES
d292c6ff28e9  localhost/podman-pause:4.6.1-1702418000                          9 minutes ago  Up 9 minutes  127.0.0.1:20015->80/tcp  80b8de25945f-infra
d8df02bf6f4a  docker.io/library/postgres:15.5-alpine3.19          --character-set-s...  9 minutes ago  Up 9 minutes  127.0.0.1:20015->80/tcp  postgresql-app
9e58e5bd676f  docker.io/library/nginx:stable-alpine3.17  nginx -g daemon o...  9 minutes ago  Up 9 minutes  127.0.0.1:20015->80/tcp  coder-app

you can see what environment variable is inside the container

podman exec  coder-app env
TERM=xterm
container=podman
NGINX_VERSION=1.24.0
PKG_RELEASE=1
NJS_VERSION=0.7.12
NGINX_IMAGE=docker.io/nginx:stable-alpine3.17
CONFIG_DATABASE_URI="postgresql://postgres:Nethesis,[email protected]:5432/toto"
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
HOME=/root

you can run a shell inside the container

podman exec -ti   coder-app sh
/ # 

Testing

Test the module using the test-module.sh script:

./test-module.sh <NODE_ADDR> ghcr.io/nethserver/coder:latest

The tests are made using Robot Framework

UI translation

Translated with Weblate.

To setup the translation process:

• add GitHub Weblate app to your repository
• add your repository to [hosted.weblate.org]((https://hosted.weblate.org) or ask a NethServer developer to add it to ns8 Weblate project