Tom Zhou zhouqt

## optimal_mtu.md

      
              3 files
            
          
              19 forks
            
          
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              183 stars
            
          
                nitred
                / optimal_mtu.md
            
            
              Last active
              June 19, 2024 22:47
            
              
                Wireguard Optimal MTU
              
          
    About


I faced bandwidth issues between a WG Peer and a WG server. Download bandwidth when downloading from WG Server to WG peer was reduced significantly and upload bandwidth was practically non existent.
I found a few reddit posts that said that we need to choose the right MTU. So I wrote a script to find an optimal MTU.
Ideally I would have liked to have run all possible MTU configurations for both WG Server and WG Peer but for simplicity I choose to fix the WG Server to the original 1420 MTU and tried all MTUs from 1280 to 1500 for the WG Peer.

Testing


On WG server, I started an iperf3 server
On WG peer, I wrote a script that does the following:

wg-quick down wg0


Edit MTU in the /etc/wireguard/wg0.conf file


## rabbit-tell.awk
#!/usr/bin/gawk -f
#
# Usage: ./rabbit-tell.awk <rabbitmqctl_report>
#
# Common RabbitMQ issues that this script can be used to identify
#
# - Partitioned cluster
#
# - High binary/queue memory usage. There are mainly two causes of this:
#

## recover_machine_agents.py
#!/usr/bin/env python3
"""
This is a tool for recovering lost machine units in current model

Usage:
{0} model-name dest-dir
"""

# changes summary:
# added logic to prevent overwrite /var/lib/juju to avoid removing non-machine units

## autoinstaller_minimal.sh
#!/bin/sh

VM_NAME=UbuntuAutoinstall
UBUNTU_ISO="$PWD/ubuntu-groovy-live-server-amd64.iso"
UBUNTU_DOWNLOAD_URL=http://cdimage.ubuntu.com/ubuntu-server/daily-live/current/groovy-live-server-amd64.iso

set -eux

[[ ! -e "$UBUNTU_ISO" ]] && wget -O "$UBUNTU_ISO" $UBUNTU_DOWNLOAD_URL

## docker-registry-mirrors.md

      
              1 file
            
          
              294 forks
            
          
              129 comments
            
          
              2095 stars
            
          
                y0ngb1n
                / docker-registry-mirrors.md
            
            
              Last active
              June 20, 2024 06:26
            
              
                国内的 Docker Hub 镜像加速器，由国内教育机构与各大云服务商提供的镜像加速服务 | Dockerized 实践 https://github.com/y0ngb1n/dockerized
              
          
    Docker Hub 镜像加速器

国内从 Docker Hub 拉取镜像有时会遇到困难，此时可以配置镜像加速器。

Dockerized 实践 https://github.com/y0ngb1n/dockerized

Docker daemon 配置代理

参考 Docker daemon 配置代理

  
## proxy.md

      
              1 file
            
          
              81 forks
            
          
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              247 stars
            
          
                yougg
                / proxy.md
            
            
              Last active
              June 20, 2024 00:39
            
              
                complete ways to set http/socks/ssh proxy environment variables 
              
          
    set http or socks proxy environment variables

# set http proxy
export http_proxy=http://PROXYHOST:PROXYPORT

# set http proxy with user and password
export http_proxy=http://USERNAME:PASSWORD@PROXYHOST:PROXYPORT

# set http proxy with user and password (with special characters)

  
## gist:4f67a7fa1b0c6809a86f014694ac6c3a
version: '2.1'
services:
  php:
    tty: true
    build:
      context: .
      dockerfile: tests/Docker/Dockerfile-PHP
      args:
        version: cli
    volumes:

## selfsign-vmware-modules.sh
#!/bin/sh

#Asking for sudo because the script needs it almost all the time
sudo echo -n

#Creating the key used to sign the two modules
echo 'Preparing vmware key...'
openssl req -new -x509 -newkey rsa:2048 -keyout VMWAREKEY.priv -outform DER -out VMWAREKEY.der -nodes -days 36500 -subj "/CN=VMware/"

#Sign the modules

## bootstrap-fedora18-libvirt.sh
#!/bin/sh

#----
# bootstrap fedora18

#release=$(cat /etc/fedora-release | awk '/^Fedora/ {print $3}')
#arch=$(arch)
release=18
arch=x86_64
ROOTFS=/var/lib/libvirt/lxc/fedora$release-$arch
	#!/usr/bin/gawk -f
	#
	# Usage: ./rabbit-tell.awk <rabbitmqctl_report>
	#
	# Common RabbitMQ issues that this script can be used to identify
	#
	# - Partitioned cluster
	#
	# - High binary/queue memory usage. There are mainly two causes of this:
	#
	#!/usr/bin/env python3
	"""
	This is a tool for recovering lost machine units in current model

	Usage:
	{0} model-name dest-dir
	"""

	# changes summary:
	# added logic to prevent overwrite /var/lib/juju to avoid removing non-machine units
	#!/bin/sh

	VM_NAME=UbuntuAutoinstall
	UBUNTU_ISO="$PWD/ubuntu-groovy-live-server-amd64.iso"
	UBUNTU_DOWNLOAD_URL=http://cdimage.ubuntu.com/ubuntu-server/daily-live/current/groovy-live-server-amd64.iso

	set -eux

	[[ ! -e "$UBUNTU_ISO" ]] && wget -O "$UBUNTU_ISO" $UBUNTU_DOWNLOAD_URL
	version: '2.1'
	services:
	php:
	tty: true
	build:
	context: .
	dockerfile: tests/Docker/Dockerfile-PHP
	args:
	version: cli
	volumes:
	#!/bin/sh

	#Asking for sudo because the script needs it almost all the time
	sudo echo -n

	#Creating the key used to sign the two modules
	echo 'Preparing vmware key...'
	openssl req -new -x509 -newkey rsa:2048 -keyout VMWAREKEY.priv -outform DER -out VMWAREKEY.der -nodes -days 36500 -subj "/CN=VMware/"

	#Sign the modules
	#!/bin/sh

	#----
	# bootstrap fedora18

	#release=$(cat /etc/fedora-release \| awk '/^Fedora/ {print $3}')
	#arch=$(arch)
	release=18
	arch=x86_64
	ROOTFS=/var/lib/libvirt/lxc/fedora$release-$arch