samklr

Moved to git repository: https://github.com/denji/golang-tls

Generate private key (.key)

# Key considerations for algorithm "RSA" ≥ 2048-bit
openssl genrsa -out server.key 2048

# Key considerations for algorithm "ECDSA" ≥ secp384r1
# List ECDSA the supported curves (openssl ecparam -list_curves)

samklr

I've been working with Kafka for over 7 years. I inevitably find myself doing the same set of activities while I'm developing or working with someone else's system. Here's a set of Kafka productivity hacks for doing a few things way faster than you're probably doing them now. 🔥

• Show me all my Kafka topics and their partitions, replicas, and consumers
• Show me the contents of a topic
• Create a Kafka topic
• Produce messages to a Kafka topic
• Validate the schema of messages before producing to a topic
• Do all of this at a distance

Get the tools

samklr

import akka.actor.{ ActorSystem, Props }
import akka.io.IO
import com.typesafe.config.Config
import com.typesafe.scalalogging.LazyLogging
import spray.can.Http

sealed class HealthStatusService(actorNames: List[String], webConfig: Config)(implicit system: ActorSystem) extends LazyLogging {

  private[status] val healthCheckPath: String = webConfig.getString("status-path")
  private[status] val timeoutDuration: Int = webConfig.getInt("timeout")

samklr

Scala AES-CTR encryption Bouncy Castle example

Add the following library:

libraryDependencies += "org.bouncycastle" % "bcprov-jdk16" % "1.46"

AESCTR.scala

samklr

FMCloud:~# wget https://gist.githubusercontent.com/MorganGeek/43ecb0ef1ac65322cd9237c16e77a5bb/raw/c8be05b2305c5b03b0e6ea1f2f27628625145371/wdmycloud-install-transmission.sh
--2017-06-17 07:54:43--  https://gist.githubusercontent.com/MorganGeek/43ecb0ef1ac65322cd9237c16e77a5bb/raw/c8be05b2305c5b03b0e6ea1f2f27628625145371/wdmycloud-install-transmission.sh
Resolving gist.githubusercontent.com (gist.githubusercontent.com)... 151.101.36.133
Connecting to gist.githubusercontent.com (gist.githubusercontent.com)|151.101.36.133|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1136 (1.1K) [text/plain]
Saving to: `wdmycloud-install-transmission.sh'

100%[===================================================================================================================>] 1,136       --.-K/s   in 0.001s

samklr

Cryptographic Best Practices

Putting cryptographic primitives together is a lot like putting a jigsaw puzzle together, where all the pieces are cut exactly the same way, but there is only one correct solution. Thankfully, there are some projects out there that are working hard to make sure developers are getting it right.

The following advice comes from years of research from leading security researchers, developers, and cryptographers. This Gist was [forked from Thomas Ptacek's Gist][1] to be more readable. Additions have been added from

samklr

Markdown cheatsheet

Create

• Class
• Cluster
• Edge
• Vertex

Insert

• Insert

samklr

  "mappings": {
    "_default_": {
      "_all": {
        "norms": false
      },
      "_meta": {
        "version": "5.1.1"
      },
      "dynamic_templates": [

samklr

filebeat.prospectors: 
# BEGIN -- HAProxy logging configured by Ansible 
- input_type: log 
  paths: 
    - /var/log/haproxy.log 
  document_type: haproxy 
# END -- HAProxy logging configured by Ansible 
# BEGIN -- Nginx logging configured by Ansible 
- input_type: log 

samklr

(still a work-in-progress)

Shortlinks:

• Cluster Health
  • Index Level
  • Shard Level
• Nodes Overview
• Indices Overview
• Cluster Maintenance