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function tprint (tbl, indent)
  if not indent then indent = 0 end
  local toprint = string.rep(" ", indent) .. "{\r\n"
  indent = indent + 2 
  for k, v in pairs(tbl) do
    toprint = toprint .. string.rep(" ", indent)
    if (type(k) == "number") then
      toprint = toprint .. "[" .. k .. "] : "
    elseif (type(k) == "string") then
      toprint = toprint  .. k ..  ": "   

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{
    "openapi": "3.0.2",
    "info": {
        "title": "Users API",
        "version": "1.0.0",
        "description": "Users API Specification"
    },
    "paths": {
        "/orders-api/orders": {
            "summary": "Path used to manage the list of orders.",

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Benchmark commands

Producer

Setup

bin/kafka-topics.sh \
  --zookeeper zookeeper.example.com:2181 \
  --create \

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TCP Dump Example

Check TCP Packet Content on Port 80

tcpdump -i eth0 -nn -s 1800 -XXX port 80

Check TCP Syn Packet on Port 80

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Kafka Topics

List existing topics

bin/kafka-topics.sh --zookeeper localhost:2181 --list

Describe a topic

bin/kafka-topics.sh --zookeeper localhost:2181 --describe --topic mytopic

Purge a topic

bin/kafka-topics.sh --zookeeper localhost:2181 --alter --topic mytopic --config retention.ms=1000

... wait a minute ...

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{
    "host": "api-3scale-apicast-staging.apps.latam-559c.open.redhat.com",
    "next": {
        "current": {
            "configuration": {
                "services": {
                    "hasht": {},
                    "node2key": {},
                    "key2node": {}
                },

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"parameters": [
          {
            "name": "user_key",
            "description": "Your access API Key",
            "type": "string",
            "in": "query",
            "x-data-threescale-name": "user_keys",
            "required": true
          },
          // ...

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# @author Rodrigo Ramalho - [email protected] / [email protected]
# This script creates:
# - nfs directory
# - persistence volume on openshift
# - persistence claim on openshift
# Parameters:
# 1. Directory to be create (every names, pv, pvc, nfs will be based on this name)
# 2. Size in Gb
# 3. Project in which pvc will be created
# Usage: oc-nfs-volume jenkis-storage 5 desenvolvimento claim-name

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# From your host, SSH as ec2-user into the bastion server
# ssh -i /path/ocpkey.pem \
#       [email protected]

# Become root on the bastion server
#sudo -i

oc get pods --all-namespaces | grep Crash | awk '{ printf ("oc delete pod %5s\t -n %s\n", $2, $1) }' | while read -r line ; do $line; done

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Integration Demos

Integrating message-oriented middleware with a RESTful API using AMQ Online

This is available as a walkthrough. On Integreatly environment.

1) Create a queue

work-queue-requests