tombentley

Kafka Cheat Sheet

Display Topic Information

$ kafka-topics.sh --describe --zookeeper localhost:2181 --topic beacon
Topic:beacon	PartitionCount:6	ReplicationFactor:1	Configs:
	Topic: beacon	Partition: 0	Leader: 1	Replicas: 1	Isr: 1
	Topic: beacon	Partition: 1	Leader: 1	Replicas: 1	Isr: 1

Maqiushi

--Read the binary file, lua takes binary files with no difference to strings(all UNIX;https://www.lua.org/pil/21.2.2.html). But, use 'b' tag
local inp = assert(io.open("xxxx.xml.gz", "rb"))

local data = inp:read("*all")

--HTTP custom settings
--Remember to set the schema, host and port here otherwise it will use default.
wrk.scheme = "http"
wrk.host = "localhost"
wrk.port = 3000

bastman

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm