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Denis Barsukov bard86

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bard86 / ConsumeHeap.java
Created April 18, 2022 14:25 — forked from mosheeshel/ConsumeHeap.java
Function to fill JVM/Java Heap, Java options to automatically create a Heapdump on that event and a companion script to upload resulting files to S3
import java.io.IOException;
import java.util.Vector;
/**
* Created by moshee
* on: 07/06/17
* to compile in place: `javac ConsumeHeap.java`
* Execute: `java -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/var/log/app-`date +%s`-pid$$.hprof -XX:OnOutOfMemoryError=/opt/app/bin/upload_dump_s3.sh -Xmx2m ConsumeHeap`
* HeapDumpOnOutOfMemoryError specifies to automatically create a dump when OOM occures
* HeapDumpPath supplies a path to put that file
@bard86
bard86 / macos-ramdisk.md
Created March 19, 2021 18:06 — forked from htr3n/macos-ramdisk.md
Creating RAM disk in macOS

Built-in

diskutil erasevolume HFS+ 'RAM Disk' `hdiutil attach -nobrowse -nomount ram://XXXXX`

where XXXXX is the size of the RAM disk in terms of memory blocks.

Notes:

@bard86
bard86 / gist:f5dd8b5312007ca2bcb327199b403091
Created March 18, 2021 11:48 — forked from drm317/gist:3e2a9ce4ba1288c4fbaab1e534d71133
OpenJDK 11+ on MacOS X

OpenJDK 11+ on MacOS X

Manually downloading, extracting and configuring the installation of OpenJDK 11+ is a high-maintenance exercise. Particularly if you need to install and switch between multiple versions of the JDK.

The following options for installing OpenJDK 11+ and switching between versions make the job easier..

Install with Jabba

Jabba is a Java version manager inspired by nvm (Node.js) written in Go.

@bard86
bard86 / tokens.md
Created February 5, 2021 19:29 — forked from zmts/tokens.md
Про токены, JSON Web Tokens (JWT), аутентификацию и авторизацию. Token-Based Authentication

Про токены, JSON Web Tokens (JWT), аутентификацию и авторизацию. Token-Based Authentication

Last major update: 25.08.2020

  • Что такое авторизация/аутентификация
  • Где хранить токены
  • Как ставить куки ?
  • Процесс логина
  • Процесс рефреш токенов
  • Кража токенов/Механизм контроля токенов
@bard86
bard86 / kubernetes_add_service_account_kubeconfig.sh
Created May 8, 2020 20:33 — forked from innovia/kubernetes_add_service_account_kubeconfig.sh
Create a service account and generate a kubeconfig file for it - this will also set the default namespace for the user
#!/bin/bash
set -e
set -o pipefail
# Add user to k8s using service account, no RBAC (must create RBAC after this script)
if [[ -z "$1" ]] || [[ -z "$2" ]]; then
echo "usage: $0 <service_account_name> <namespace>"
exit 1
fi
@bard86
bard86 / Find and Kill Process
Created May 2, 2020 17:17 — forked from sharepointoscar/Find and Kill Process
# Find process running on port 8080
lsof -i:8080
# Just kill it
kill -9 $(lsof -t -i:8080)
# find process listening on port 9200
lsof -nP -i4TCP:$PORT | grep LISTEN
@bard86
bard86 / run_squid.sh
Created April 25, 2020 09:45
Squid cache proxy
docker volume create --name squidVolume
docker run --name squid -d -p 3128:3128 -v squidVolume:/var/spool/squid Datadog/squid
@bard86
bard86 / install_tools_bamboo_agent.sh
Last active April 23, 2020 22:17
Bamboo agent tools
apt update
apt install git
apt install iputils-ping
apt install net-tools
apt install telnet
curl -L "https://github.com/docker/compose/releases/download/1.25.5/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose
ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose
@bard86
bard86 / set_aliases.sh
Created April 22, 2020 11:45
Alias set
alias dc='docker-compose'
@bard86
bard86 / Docker.txt
Created April 20, 2020 17:51
Docker commands cheatsheet
docker images --format "{{.Repository}}:{{.Tag}}" | grep -v "none"