Alexey Zalesny alces

alces / git_log.sh

Last active July 3, 2020 11:58

Getting list of subset of the commits in a git branch in a reverse order with a custom format

	# See git log --help for details
	git log --reverse --after='Jan 19' --format='format:%h %an'

alces / check_keytabs.sh

Created January 7, 2020 12:36

Check all Kerberos keytabs in the current directory

	#!/bin/bash

	# Check all keytabs in the current directory

	for kt in *.keytab
	do
	pr=$(klist -k $kt \| tail -1 \| awk '{print $2}')
	echo -n "${kt}: "
	kinit -kt $kt $pr > /dev/null 2>&1 && echo OK \|\| echo FAILED
	done

alces / get_java_rpm_version.py

Created December 31, 2019 14:00

Print Java RPM version (tested on RedHat 7)

	import rpm

	for pkg in rpm.TransactionSet().dbMatch('provides', 'java'):
	print '%s:%s:%s:%s' % (pkg['name'], pkg['version'], pkg['release'], pkg['epoch'])

alces / md5_pass_encrypt.py

Created November 19, 2019 10:53

MD5 UN*X password encryption in Python

	import crypt
	crypt.crypt('my-secret-word', '$1$someSalt$')

alces / summarize_by_day.prometheus

Created November 6, 2019 05:13

Prometheus expression summarizing message count for a given Kafka topic by day

sum(increase(kafka_producer_topic_metrics_record_send_total{topic = "$my_topic_name"}[1d]))

alces / kafka_topics_delete.sh

Created October 30, 2019 05:56

Delete Kafka topics with matching names

	TOPIC_NAME_REGEX='(CI\|TST\|IT)[0-9]'
	ZOOKEEPER_ADDR=127.0.0.1:2181

	for topic in $(kafka-topics --zookeeper $ZOOKEEPER_ADDR --list \| egrep $TOPIC_NAME_REGEX)
	do
	kafka-topics --zookeeper $ZOOKEEPER_ADDR --delete --topic $topic
	done

alces / Jenkinsfile

Created October 7, 2019 06:16

Ask for password in Jenkins pipeline

	pipeline {
	agent {
	label 'Linux'
	}
	stages {
	stage('ask') {
	steps {
	script {
	def askpass = input(
	message: 'Please enter the password',

alces / delete_old_schemas.py

Created September 19, 2019 07:51

Remove old schemes from Confluent Schema Registry

	#!/usr/bin/env python
	# Cleanup old schemas from schema registry

	import httplib
	import json
	import re

	DELETE_REGEX = 'IT6[0-6][0-9]-'

	con = httplib.HTTPConnection('127.0.0.1', 8081)

alces / get_compressed_url.py

Created September 10, 2019 09:17

Fetch compressed content from an URL (e.g., usable with Lenses REST API)

	#!/usr/bin/env python
	# Get compressed URL content

	import gzip
	import StringIO
	import urllib2

	req = urllib2.Request('http://my.lenses.url/api/alerts',
	headers = {
	'Accept-encoding': 'gzip',

alces / check_srv.py

Created September 9, 2019 07:18

Check service availability from Python script

	!/usr/bin/env python
	# Check service availability
	# Usage: $0 hostname port

	import socket
	import sys

	if len(sys.argv) != 3:
	sys.stderr.write("Usage: %s hostname port\n" % sys.argv[0])
	sys.exit(2)