sahilsk

Lets say i want to rebalance my-sample-topic topic on my kafka cluster

Create topcis.json

{
  "version": 1,
  "topics": [
 { "topic": "my-sample-topic" 

agc93

#!/usr/bin/env bash

for i in $(docker ps -q);do
    echo "Container $i"
    docker inspect -f '{{ json .Mounts }}' $i | python -m json.tool
    echo "-------------------"
done

sahilsk

Kafka Cheat Sheet

Display Topic Information

$ kafka-topics.sh --describe --zookeeper localhost:2181 --topic beacon
Topic:beacon	PartitionCount:6	ReplicationFactor:1	Configs:
	Topic: beacon	Partition: 0	Leader: 1	Replicas: 1	Isr: 1
	Topic: beacon	Partition: 1	Leader: 1	Replicas: 1	Isr: 1

cvega

FILE SPACING:

 # double space a file
 sed G

 # double space a file which already has blank lines in it. Output file
 # should contain no more than one blank line between lines of text.
 sed '/^$/d;G'

ageis

security and hardening options for systemd service units

A common and reliable pattern in service unit files is thus:

NoNewPrivileges=yes
PrivateTmp=yes
PrivateDevices=yes
DevicePolicy=closed
ProtectSystem=strict

so0k

Kubectl output options

Let's look at some basic kubectl output options.

Our intention is to list nodes (with their AWS InstanceId) and Pods (sorted by node).

We can start with:

kubectl get no

bom-d-van

# https://www.percona.com/blog/2008/11/07/poor-mans-query-logging/

tcpdump -i eth0 -s 0 -l -w - dst port 3306 | strings | perl -e '
while(<>) { chomp; next if /^[^ ]+[ ]*$/;
  if(/^(SELECT|UPDATE|DELETE|INSERT|SET|COMMIT|ROLLBACK|CREATE|DROP|ALTER)/i) {
    if (defined $q) { print "$q\n"; }
    $q=$_;
  } else {
    $_ =~ s/^[ \t]+//; $q.=" $_";
  }

sahilsk

##########################################
#### input
##########################################

# syslog logging
<source>
  type tail
  path /var/log/syslog, /var/log/auth.log, /var/log/kern.log
  pos_file /tmp/td-agent/pos/syslog
  refresh_interval 1

stevenswafford

=== http status codes ===================================================

1xx Informational
 100 Continue
 101 Switching Protocols
 102 Processing (WebDAV; RFC 2518)

2xx Success
 200 OK
 201 Created

stevenswafford

"          _                      _          "
"   _     /||       .   .        ||\     _   "
"  ( }    \||D    '   '     '   C||/    { %  "
" | /\__,=_[_]   '  .   . '       [_]_=,__/\ |"
" |_\_  |----|                    |----|  _/_|"
" |  |/ |    |                    |    | \|  |"
" |  /_ |    |                    |    | _\  |"

	It is all fun and games until someone gets hacked!