# How-To: Ispezionare la Configurazione di Rete

Guida per analizzare e debuggare le reti Docker.

## Ispezionare una Rete Specifica

```bash
docker network inspect NETWORK_NAME
```

Output JSON con: Subnet, Gateway, Driver, Container collegati.

## Comandi Utili

### Mostra Solo le Informazioni Importanti

```bash
# Subnet e Gateway
docker network inspect my-network --format '{{range .IPAM.Config}}{{.Subnet}} (GW: {{.Gateway}}){{end}}'

# Solo container collegati
docker network inspect my-network --format '{{range .Containers}}{{.Name}} {{.IPv4Address}}{{end}}'

# Driver e Scope
docker network inspect my-network --format 'Driver: {{.Driver}}, Scope: {{.Scope}}'
```

### Vedere i Container in una Rete

```bash
# Metodo 1: Tramite inspect
docker network inspect my-network --format '{{json .Containers}}' | jq '.[] | .Name'

# Metodo 2: Tramite docker ps con filtro
docker ps --filter "network=my-network" --format "{{.Names}}"
```

### Verificare IP di un Container

```bash
# Tutti gli IP del container
docker inspect container-name --format '{{range .NetworkSettings.Networks}}{{.Network}}: {{.IPAddress}}{{end}}'

# IP in una rete specifica
docker inspect container-name --format '{{range $k, $v := .NetworkSettings.Networks}}{{if eq $k "my-network"}}{{$v.IPAddress}}{{end}}{{end}}'
```

### Debug con Output Formattato

```bash
# Tabella container -> IP -> Rete
docker ps --format "{{.Names}}" | while read c; do
    echo "Container: $c"
    docker inspect $c --format '{{range $k, $v := .NetworkSettings.Networks}}  {{$k}}: {{$v.IPAddress}}{{end}}'
done
```

## Risoluzione Problemi

### Rete Non Trovata

```bash
# Verifica esistenza rete
docker network ls | grep my-network

# Se non esiste, creala
docker network create my-network
```

### Container Non in Rete

```bash
# Collega container a rete
docker network connect my-network container-name

# Scollega container da rete
docker network disconnect my-network container-name
```

### Subnet Conflicts

```bash
# Trova subnet in conflitto
docker network ls -q | xargs docker network inspect --format '{{.Name}}: {{range .IPAM.Config}}{{.Subnet}}{{end}}' | grep "10.0.1"
```

## Vedi Anche

- [Reference: Compose Network Syntax](../reference/compose-network-syntax.md)