Glances

Glances is a CLI and Web GUI monitor for your server. It's neat and nice, and it's not intrusive. It comes with a nice CLI interface, but also with an handy WEB GUI interface, which is what i want to leverage here.

Note: i stopped using Glances because it had a visible impact on my server performances.

Glances is available in Gentoo's Portage, but lacks the FastAPI and Uvcorn dependencies, so it's better to create a dedicated venv as root:

  python -m venv /opt/glances
    . /opt/glances/bin/activate
    pip install glances fastapi uvicorn jinja2

Glances needs to be set up in the reverse proxy to be accessed protected behind your SSO:

glances.conf

location = /glances {
        return 301 https://$host/glances/;
}

location /glances/ {
  rewrite /glances/(.*) /$1 break;
  proxy_pass http://localhost:61208/;
  proxy_set_header Host $http_host;
  proxy_set_header X-Real-IP $remote_addr;
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  proxy_set_header X-Forwarded-Proto $scheme;
}

Create the following OpenRC start script into /etc/init.d/glancesweb and make it exetuable:

glancesweb

#!/sbin/openrc-run
# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

description="Glances web server"
pidfile="/run/glancesweb.pid"
logfile="/var/log/glancesweb.log"

depend() {
        need net
}

start() {
        . /opt/glances/bin/activate
        /opt/glances/bin/glances -w > ${logfile} 2> ${logfile}&
        echo $! > ${pidfile}
}

Then of course, set it to boot:

rc-update add glancesweb default