diegopacheco

Install and Run

sudo pip install localstack
sudo localstack start --docker

Use

coco98

apiVersion: v1
kind: ReplicationController
metadata:
  name: kube-registry-v0
  namespace: kube-system
  labels:
    k8s-app: kube-registry
    version: v0
spec:
  replicas: 1

diegopacheco

jmap -dump:format=b,file=cheap.bin <pid>
jhat cheap.bin

diegopacheco

wget http://repo.typesafe.com/typesafe/releases/cmdline-jmxclient/cmdline-jmxclient/0.10.3/cmdline-jmxclient-0.10.3.jar
java -jar cmdline-jmxclient-0.10.3.jar - localhost:7199

Sample for CASS

java -jar  cmdline-jmxclient-0.10.3.jar - localhost:7199 java.lang:type=Threading ThreadCount
java -jar cmdline-jmxclient-0.10.3.jar - localhost:7199 java.lang:type=ClassLoading LoadedClassCount

jdegoes

Applied Functional Programming with Scala - Notes

Copyright © 2016-2018 Fantasyland Institute of Learning. All rights reserved.

1. Mastering Functions

A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.

val square : Int => Int = x => x * x

diegopacheco

Summary

0. Not 100% sure if is really needed Chnage the hostname (https://gist.github.com/diegopacheco/56a0fd87626406337caea0ff15f49850) and create a route53 public dns (but I did it)
1. we need change etc/jetty-jmx.xml
2. We need to add configs to start.ini
3. we need have a tunnel ssh
4. we can acess via jvisualvm or jconsole service:jmx:rmi://127.0.0.1:10002/jndi/rmi://127.0.0.1:10001/jettyjmx

#1 

ursuad

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 ...

pmauduit

LoadPlugin java

<Plugin "java">
   JVMArg "-Djava.class.path=/usr/share/collectd/java/collectd-api.jar:/usr/share/collectd/java/generic-jmx.jar"
   LoadPlugin "org.collectd.java.GenericJMX"

   <Plugin "GenericJMX">
   # Garbage collector information
   <MBean "garbage_collector">
     ObjectName "java.lang:type=GarbageCollector,*"

bueckl

#Spider Websites with Wget – 20 Practical Examples

Wget is extremely powerful, but like with most other command line programs, the plethora of options it supports can be intimidating to new users. Thus what we have here are a collection of wget commands that you can use to accomplish common tasks from downloading single files to mirroring entire websites. It will help if you can read through the wget manual but for the busy souls, these commands are ready to execute.

1. Download a single file from the Internet
wget http://example.com/file.iso

2. Download a file but save it locally under a different name
wget ‐‐output-document=filename.html example.com

marcosvidolin

# to list all ports that are used
sudo netstat -ntlp | grep LISTEN

# you can obtain a specific port using the following command
sudo netstat -ntlp | grep :8080

# when you execute the command above you will see something like that
tcp        0      0 0.0.0.0:27370           0.0.0.0:*               LISTEN      4394/skype      
tcp        0      0 127.0.1.1:53            0.0.0.0:*               LISTEN      2216/dnsmasq    
tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      4912/cupsd