posener

Story: Writing Scripts with Go

This is a story about how I tried to use Go for scripting. In this story, I’ll discuss the need for a Go script, how we would expect it to behave and the possible implementations; During the discussion I’ll deep dive to scripts, shells, and shebangs. Finally, we’ll discuss solutions that will make Go scripts work.

Why Go is good for scripting?

While python and bash are popular scripting languages, C, C++ and Java are not used for scripts at all, and some languages are somewhere in between.

mcastelino

Summary

• dnsmasq front ends the requests and sends them on to kube-dns

  dnsmasq
    --cache-size=1000
    --no-resolv
    --server=127.0.0.1#10053
  

--log-facility=-

xydinesh

A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

---

Index:

xydinesh

Intermediate CA Signing with Puppet

Problem statement

Many sites have a requirement to use an enterprise-wide certificate authority. They either have a "real" signing cert that chains to a public root CA or an internal root (usually air-gapped) which only signs issuing CA certificates, one per PKI application.

Puppet does not have a currently supported configuration which fits into this model. The [existing documentation][existing] describes using an "external CA" instead of Puppet's internally generated CA (which is a combined self-signed Root and issuing CA in one), but requires that the user turn off Puppet's issuance code and leaves the whole certificate generation and distribution workflow as an "exercise to the reader".

The procedure in this document describes a supportable configuration which bridges the gap between these two positions: it is possible to use Puppet's internal signing code to issue certificates from an intermediate CA cert which was externally generated and signed. There are a

ahpook

Intermediate CA Signing with Puppet

Problem statement

Many sites have a requirement to use an enterprise-wide certificate authority. They either have a "real" signing cert that chains to a public root CA or an internal root (usually air-gapped) which only signs issuing CA certificates, one per PKI application.

Puppet does not have a currently supported configuration which fits into this model. The [existing documentation][existing] describes using an "external CA" instead of Puppet's internally generated CA (which is a combined self-signed Root and issuing CA in one), but requires that the user turn off Puppet's issuance code and leaves the whole certificate generation and distribution workflow as an "exercise to the reader".

The procedure in this document describes a supportable configuration which bridges the gap between these two positions: it is possible to use Puppet's internal signing code to issue certificates from an intermediate CA cert which was externally generated and signed. There are a

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

bcantoni

# -*- mode: ruby -*-
# vi: set ft=ruby :

# Vagrant on AWS Example
# Brian Cantoni

# This sample sets up 1 VM ('delta') with only Java installed.

# Adjustable settings
CFG_TZ = "US/Pacific"     # timezone, like US/Pacific, US/Eastern, UTC, Europe/Warsaw, etc.

kachayev

Channels Are Not Enough

... or Why Pipelining Is Not That Easy

Golang Concurrency Patterns for brave and smart.

By @kachayev

Intro

xydinesh

from sqlalchemy.dialects import registry
from sqlalchemy.engine import reflection
from sqlalchemy.connectors.pyodbc import PyODBCConnector
from sqlalchemy.dialects.postgresql.base import (
    PGDialect, PGTypeCompiler, PGCompiler, PGDDLCompiler, DOUBLE_PRECISION,
    INTERVAL, TIME, TIMESTAMP)
from sqlalchemy import MetaData
import sqlalchemy.types as sqltypes
from sqlalchemy.schema import SchemaItem
from sqlalchemy.sql import Select, text, bindparam

xydinesh

groupBy('source) {
  _.sortBy('links)
    .reverse
    .mapStream[(String,Int), (String, Int, Int, Int)]
      (('destination, 'links) -> ('destination, 'links, 'rank, 'gap)) { destLinks =>
        destLinks.scanLeft(None: Option[(String, Int, Int, Int)]) {
          (prevRowOut: Option[(String,Int,Int,Int)], thisRow: (String, Int))  =>
          val (dest, links) = thisRow
          prevRowOut match {
            case None => Some((dest, links, 1, 0)) // rank 1, gap 0 -- not exactly what you wanted...