alex-egorov

Keybase proof

I hereby claim:

• I am alex-egorov on github.
• I am aegorov (https://keybase.io/aegorov) on keybase.
• I have a public key ASD7kznZ3pXscouEVUhdAC_C8zrJY_QluCcgY7_Eh065UAo

To claim this, I am signing this object:

alex-egorov

set -e, -u, -x, -o pipefail

The set lines

• These lines deliberately cause your script to fail. Wait, what? Believe me, this is a good thing.
• With these settings, certain common errors will cause the script to immediately fail, explicitly and loudly. Otherwise, you can get hidden bugs that are discovered only when they blow up in production.

• set -euxo pipefail is short for:

set -e
set -u

alex-egorov

Install krew

https://krew.sigs.k8s.io/docs/user-guide/setup/install/

(
  set -x; cd "$(mktemp -d)" &&
  OS="$(uname | tr '[:upper:]' '[:lower:]')" &&
  ARCH="$(uname -m | sed -e 's/x86_64/amd64/' -e 's/\(arm\)\(64\)\?.*/\1\2/' -e 's/aarch64$/arm64/')" &&

alex-egorov

Steps to install BCC and bpftrace from source on Ubuntu 18.04.

BCC

Install build dependencies

sudo apt-get -y install bison build-essential cmake flex git libedit-dev \
  libllvm6.0 llvm-6.0-dev libclang-6.0-dev python zlib1g-dev libelf-dev \
 iperf3 luajit libluajit-5.1-dev netperf linux-headers-$(uname -r)

alex-egorov

Kafka Topics

List existing topics

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

Purge a topic

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

... wait a minute ...

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

alex-egorov

My Elasticsearch cheatsheet with example usage via rest api (still a work-in-progress)

Shortlinks:

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

alex-egorov

Elasticsearch Cheat Sheet

Populating this as we dig further into the platform, hopefully it'll be as useful to you as it is to use.

• When you need to reboot at least one node
• Explain why a shard is unallocated
• Fix an unallocated primary shard
• Turn off replication for an index
• Set transaction log (TRANSLOG) size

alex-egorov

Kubernetes Tools

• https://github.com/derailed/k9s
• https://github.com/wagoodman/dive
• https://github.com/wercker/stern
• https://github.com/pulumi/kubespy

alex-egorov

#!/bin/bash -e

# Setup a Root CA in vault
# Generate and sign an Intermediate cert
#
# Requires:
# * A running vault server already initialzed and unsealed
# * Environment variable VAULT_TOKEN is set
# * vault cli (https://www.vaultproject.io)
# * httpie (https://github.com/jkbrzt/httpie)

alex-egorov

package main

import (
	"bufio"
	"encoding/json"
	"fmt"
	"net/url"
	"net/http"
	"os"
	"time"