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Thomas Kruse
2026-02-03 22:29:46 +01:00
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= Öffentliche Broker
Verbinden Sie sich zu einem öffentlichen Broker, z.B. `test.mosquitto.org`, `broker.emqx.io` oder `broker.hivemq.com`
Können Sie Nachrichten aller Topics abrufen?
$ docker run --rm -it --init --net host eclipse-mosquitto \
mosquitto_sub -h test.mosquitto.org -V 5 -v -t "#" -W 5
$ docker run --rm -it --init --net host eclipse-mosquitto \
mosquitto_sub -h broker.hivemq.com -V 5 -v -t "#" -W 5
Geben Sie von einer 10 Sekunden Messung (`timeout 10s <command>` oder `mosquitto_sub -W 10`)
die Top-10 Topics nach Nachrichten und Bytes aus (mosquitto_sub Ausgabeformat `%t` Topicname, `%l` Nachrichtenlänge)
$ docker run --rm -it --init --net host eclipse-mosquitto \
timeout 10s mosquitto_sub -h test.mosquitto.org -t "#" -F "%t %l" | \
awk '{count[$1]++; size[$1]+=$2} END {print "Topic | Nachrichten | Bytes"; \
for (i in count) print i, count[i], size[i]}' | \
column -t | sort -k2 -nr | head -n 10