laboratori-cloud/labs/lab-02-network/reference/docker-network-commands.md

Reference: Comandi Docker Network

Riferimento rapido per i comandi Docker network.

Comandi Principali

Creare una Rete

docker network create [OPTIONS] NETWORK

# Sintassi base
docker network create my-network

# Con subnet personalizzata
docker network create --subnet 10.0.1.0/24 --gateway 10.0.1.1 my-network

# Rete interna (isolata)
docker network create --internal my-internal-network

# Specifica driver
docker network create --driver bridge my-bridge-network

Lista Reti

# Tutte le reti
docker network ls

# Con dettagli
docker network ls --no-trunc

# Solo reti custom
docker network ls --filter 'type=custom'

# Format output
docker network ls --format "table {{.Name}}\t{{.Driver}}\t{{.Scope}}"

Ispezionare una Rete

# Output JSON completo
docker network inspect NETWORK

# Output specifico
docker network inspect NETWORK --format '{{.IPAM.Config}}'
docker network inspect NETWORK --format '{{.Driver}}'
docker network inspect NETWORK --format '{{.Containers}}'

Collegare Container a Rete

# Collega container a rete
docker network connect NETWORK CONTAINER

# Con IP specifico
docker network connect NETWORK CONTAINER --ip 10.0.1.100

# Con alias DNS
docker network connect NETWORK CONTAINER --alias my-service

Scollegare Container da Rete

# Scollega container
docker network disconnect NETWORK CONTAINER

# Forza (se in uso)
docker network disconnect -f NETWORK CONTAINER

Rimuovere Reti

# Rimuovi rete specifica
docker network rm NETWORK

# Rimuovi piu reti
docker network rm NETWORK1 NETWORK2 NETWORK3

# Rimuovi reti non usate
docker network prune

# Rimuovi tutte le reti custom (attenzione!)
docker network ls -q | xargs docker network rm

Opzioni Comuni

Opzione	Descrizione	Esempio
--driver	Driver di rete	--driver bridge
--subnet	CIDR subnet	--subnet 10.0.1.0/24
--gateway	Gateway IP	--gateway 10.0.1.1
--internal	Isola rete	--internal
--attachable	Permette container stand-alone	--attachable
--ip-range	Range IP per container	--ip-range 10.0.1.128/25

Driver di Rete

Driver	Descrizione	Uso
bridge	Bridge Linux (default)	Reti isolate su singolo host
overlay	Overlay Swarm	Multi-host networking
host	Host networking	Nessuna isolamento
macvlan	MACVLAN	MAC address univoco per container
none	Nessuna rete	Container senza rete

Output Format

Template Format

# Nome e driver
docker network ls --format '{{.Name}}: {{.Driver}}'

# Subnet
docker network inspect NETWORK --format '{{range .IPAM.Config}}{{.Subnet}}{{end}}'

# Container con IP
docker network inspect NETWORK --format '{{range .Containers}}{{.Name}}: {{.IPv4Address}}{{end}}'

# JSON completo
docker network inspect NETWORK --format '{{json}}'

Placeholder Disponibili

Placeholder	Descrizione
{{.Name}}	Nome rete
{{.Id}}	ID rete
{{.Driver}}	Driver
{{.Scope}}	Scope (local/swarm)
{{.Internal}}	Flag internal
{{.IPAM.Config}}	Configurazione IPAM
{{.Containers}}	Container collegati
{{.Options}}	Opzioni rete

Esempi Pratici

Creare VPC con Subnets

# Public subnet
docker network create --driver bridge \
  --subnet 10.0.1.0/24 \
  --gateway 10.0.1.1 \
  vpc-public

# Private subnet
docker network create --driver bridge \
  --subnet 10.0.2.0/24 \
  --gateway 10.0.2.1 \
  --internal \
  vpc-private

Debug Reti

# Mostra container in una rete
docker network inspect vpc-public --format '{{json .Containers}}' | jq -r '.[] | .Name'

# Verifica IP di container
docker inspect container --format '{{range $n, $c := .NetworkSettings.Networks}}{{$n}}: {{$c.IPAddress}}{{end}}'

# Trova reti di un container
docker inspect container --format '{{range .NetworkSettings.Networks}}{{$}}{{end}}'

Vedi Anche

• Tutorial: Creare Reti VPC
• Reference: Compose Network Syntax