57 lines
2.2 KiB
Bash
57 lines
2.2 KiB
Bash
#!/usr/bin/env bash
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# Script Name: dockernet-inspector.v1.sh
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# Beschreibung: Dockernet Inspector - Zeigt Details zu einem Docker-Netzwerk an (Netzwerktyp, Bridge-Interface, Subnet/Gateway, Interface-Status & Stats)
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# Verwendung: bash ./dockernet-inspector.v1.sh <docker-network-name>
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# Autor: Patrick Asmus
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# Web: https://www.cleveradmin.de
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# Git-Reposit.: https://git.techniverse.net/scriptos/dockernet-inspector.git
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# Version: 1.0.0
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# Datum: 17.02.2026
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# Modifikation: Initial
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#####################################################
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set -euo pipefail
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NET="${1:-}"
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[[ -z "$NET" ]] && { echo "Usage: $0 <docker-network-name>"; exit 1; }
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# 1) Netzwerk-ID und Bridge-Name separat holen (jeweils eigenes inspect)
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ID="$(docker network inspect "$NET" --format '{{.Id}}' 2>/dev/null || true)"
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[[ -z "$ID" ]] && { echo "Fehler: Netzwerk '$NET' nicht gefunden."; exit 2; }
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BR_RAW="$(docker network inspect "$NET" --format '{{index .Options "com.docker.network.bridge.name"}}' 2>/dev/null || true)"
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# 2) Falls kein eigener Bridge-Name: Standardname br-<ID[:12]>
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if [[ -z "$BR_RAW" || "$BR_RAW" == "<no value>" ]]; then
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IF="br-${ID:0:12}"
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else
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IF="$BR_RAW"
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fi
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# 3) Subnet/Gateway
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SUBNET="$(docker network inspect "$NET" --format '{{(index .IPAM.Config 0).Subnet}}' 2>/dev/null || true)"
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GATEWAY="$(docker network inspect "$NET" --format '{{(index .IPAM.Config 0).Gateway}}' 2>/dev/null || true)"
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# 4) Interface-Status & Stats
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state="unknown"; rxb=0; txb=0; rxp=0; txp=0
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if ip link show "$IF" &>/dev/null; then
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state="$(cat /sys/class/net/"$IF"/operstate 2>/dev/null || echo unknown)"
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rxb="$(cat /sys/class/net/"$IF"/statistics/rx_bytes 2>/dev/null || echo 0)"
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txb="$(cat /sys/class/net/"$IF"/statistics/tx_bytes 2>/dev/null || echo 0)"
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rxp="$(cat /sys/class/net/"$IF"/statistics/rx_packets 2>/dev/null || echo 0)"
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txp="$(cat /sys/class/net/"$IF"/statistics/tx_packets 2>/dev/null || echo 0)"
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else
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echo "WARN: Interface $IF existiert (noch) nicht auf dem Host."
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fi
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cat <<OUT
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Docker-Netzwerk : $NET
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Driver : $(docker network inspect "$NET" --format '{{.Driver}}')
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Bridge-Interface : $IF
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Subnet/Gateway : ${SUBNET:--} / ${GATEWAY:--}
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OperState : $state
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RX bytes/packets : $rxb / $rxp
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TX bytes/packets : $txb / $txp
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OUT
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