update readme

README.md

@@ -2,46 +2,31 @@
 
 Ansible collection to deploy a monitoring stack on top of a [TDP](https://github.com/TOSIT-IO/TDP) cluster.
 
-## Download binaries
-
-Binaries must be present inside `files` directory located next to launched playbooks. They can be found here:
-
-- Prometheus: https://github.com/prometheus/prometheus/releases
-
-## Using in tdp-getting-started
-
-```sh
-cd /path/to/tdp-getting-started
-# Make sure you are in TDP lib venv
-source ./venv/bin/activate
-
-# Install collection (SSH example)
-git clone git@github.com:TOSIT-IO/tdp-observability.git \
-  ansible_collections/tosit/tdp_observability \
-  --recurse-submodules
+## Available Roles
 
-# Setup collection
-## Destructive setup: this will reset tdp-lib database
-./ansible_collections/tosit/tdp_observability/scripts/setup.sh -c
+- tosit.alloy.agent
+- tosit.exporter.node
+- tosit.grafana.server
+- tosit.loki.server
+- tosit.prometheus.alertmanager
+- tosit.prometheus.server
 
-# Configure deployment plan for Prometheus and grafana
-tdp plan dag --target prometheus_init --target grafana_init
+## Prerequisites
 
-# Deploy Prometheus and grafana
-tdp deploy
+A python requirements files is provided with the collection. Install it on your venv with the following command
+```
+pip install -r requirements.txt
 ```
 
-Optional non-destructive option for the setup:
+## Download binaries
 
-```sh
-# Setup collection
-## Non destructive: Manually add extra tdp_cluster variables to tdp_vars
-## ON FIRST INSTALL ONLY
-cat ansible_collections/tosit/tdp_observability/tdp_vars_defaults/tdp_cluster/tdp_cluster.yml |
-grep -vP '^[#-]' | grep -P '^\w+' >> inventory/tdp_vars/tdp_cluster/tdp_cluster.yml
-cd inventory/tdp_vars/tdp_cluster && git commit -a -m 'feat: add tdp_observability vars' && cd -
-./ansible_collections/tosit/tdp_monitoring/scripts/setup.sh
-```
+Binaries must be present inside `files` directory located next to launched playbooks. They can be found here:
+
+- Grafana : https://github.com/grafana/grafana/releases
+- Prometheus: https://github.com/prometheus/prometheus/releases
+- Loki : https://github.com/grafana/loki/releases/latest
+- Node exporter : https://github.com/prometheus/node_exporter/releases
+- Alloy : https://github.com/grafana/alloy/releases
 
 ## Web UI links
 
@@ -54,7 +39,3 @@ cd inventory/tdp_vars/tdp_cluster && git commit -a -m 'feat: add tdp_observabili
   - Username: `admin`
   - Password: `GrafanaAdmin123`
 
-## Roadmap
-
-- Grafana:
-  - [ ] Use cluster PostgreSQL as back-end database