Netdata sur Rocky Linux 9

Installation de Netdata - monitoring temps réel avec dashboard.

Composant	Version
Rocky Linux	9.x
Netdata	Latest

Durée estimée : 10 minutes

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Fonctionnalités

Fonction	Description
Real-time	Métriques par seconde
Auto-discovery	Détection auto services
Zero config	Fonctionne immédiatement
Low footprint	Léger en ressources
Alerting	Alertes intégrées

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1. Installation

Script officiel

wget -O /tmp/netdata-kickstart.sh https://get.netdata.cloud/kickstart.sh
bash /tmp/netdata-kickstart.sh --stable-channel --disable-telemetry

Via repository

cat > /etc/yum.repos.d/netdata.repo << 'EOF'
[netdata_stable]
name=Netdata Stable
baseurl=https://packagecloud.io/netdata/netdata-stable/el/9/$basearch
gpgcheck=1
gpgkey=https://packagecloud.io/netdata/netdata-stable/gpgkey
enabled=1
EOF

dnf install -y netdata
systemctl enable --now netdata

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2. Firewall

firewall-cmd --permanent --add-port=19999/tcp
firewall-cmd --reload

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3. Accès

• URL: http://IP:19999
• Pas d'authentification par défaut

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4. Configuration

Fichier principal

vim /etc/netdata/netdata.conf

[global]
    hostname = server1
    history = 3996  # 1 heure à 1 seconde
    update every = 1

[web]
    bind to = 0.0.0.0
    default port = 19999

[plugins]
    proc = yes
    diskspace = yes
    cgroups = yes

Appliquer

systemctl restart netdata

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5. Authentification basique

Avec Nginx

dnf install -y nginx httpd-tools
htpasswd -c /etc/nginx/.htpasswd admin

cat > /etc/nginx/conf.d/netdata.conf << 'EOF'
server {
    listen 80;
    server_name netdata.example.com;

    location / {
        proxy_pass http://127.0.0.1:19999;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;

        auth_basic "Netdata";
        auth_basic_user_file /etc/nginx/.htpasswd;
    }
}
EOF

systemctl enable --now nginx

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6. Collectors / Plugins

Plugins actifs

ls /usr/libexec/netdata/plugins.d/

Configurer un collector

cd /etc/netdata
./edit-config go.d/nginx.conf

jobs:
  - name: local_nginx
    url: http://127.0.0.1/nginx_status

Activer le stub_status Nginx

location /nginx_status {
    stub_status on;
    allow 127.0.0.1;
    deny all;
}

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7. Monitoring Docker

Activer le plugin cgroups

./edit-config netdata.conf

[plugins]
    cgroups = yes

Socket Docker

usermod -aG docker netdata
systemctl restart netdata

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8. Monitoring MySQL/MariaDB

./edit-config go.d/mysql.conf

jobs:
  - name: local
    dsn: netdata:netdata@tcp(127.0.0.1:3306)/

Créer l'utilisateur MySQL :

CREATE USER 'netdata'@'localhost' IDENTIFIED BY 'netdata';
GRANT USAGE, REPLICATION CLIENT, PROCESS ON *.* TO 'netdata'@'localhost';
FLUSH PRIVILEGES;

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9. Alerting

Configuration alertes

./edit-config health.d/cpu.conf

alarm: cpu_usage
    on: system.cpu
lookup: average -1m percentage of user,system
 every: 10s
  warn: $this > 80
  crit: $this > 95
  info: CPU usage is high

Notifications

./edit-config health_alarm_notify.conf

# Email
SEND_EMAIL="YES"
DEFAULT_RECIPIENT_EMAIL="admin@example.com"

# Slack
SEND_SLACK="YES"
SLACK_WEBHOOK_URL="https://hooks.slack.com/services/XXX"
DEFAULT_RECIPIENT_SLACK="#alerts"

# Discord
SEND_DISCORD="YES"
DISCORD_WEBHOOK_URL="https://discord.com/api/webhooks/XXX"

Tester

/usr/libexec/netdata/plugins.d/alarm-notify.sh test

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10. Streaming (Parent/Child)

Sur le parent

./edit-config stream.conf

[API_KEY]
    enabled = yes
    allow from = *

Sur le child

./edit-config stream.conf

[stream]
    enabled = yes
    destination = parent.example.com:19999
    api key = API_KEY

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11. Netdata Cloud

Connecter à Netdata Cloud

netdata-claim.sh -token=YOUR_TOKEN -rooms=YOUR_ROOM -url=https://app.netdata.cloud

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12. Retention des données

Modifier la retention

./edit-config netdata.conf

[db]
    mode = dbengine
    dbengine multihost disk space MB = 1024
    dbengine page cache size MB = 32

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13. Export vers Prometheus

./edit-config exporting.conf

[prometheus:remote_write]
    enabled = yes
    destination = localhost:9090
    remote write URL path = /api/v1/write

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Commandes utiles

# Status
systemctl status netdata

# Logs
journalctl -u netdata -f
cat /var/log/netdata/error.log

# Vérifier config
netdata -W conf

# Redémarrer
systemctl restart netdata

# Info
netdatacli info

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Dépannage

# Vérifier les collectors
curl -s localhost:19999/api/v1/info | jq .collectors

# Debug
netdata -D  # Foreground avec debug

# Plugins health
/usr/libexec/netdata/plugins.d/python.d.plugin debug 1

# Permissions
ls -la /var/run/docker.sock

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Changelog

Date	Modification
2024-12	Création initiale