Arbal arbal

Mount Volumes into Proxmox VMs with Virtio-fs

Part of collection: Hyper-converged Homelab with Proxmox

Virtio-fs is a shared file system that lets virtual machines access a directory tree on the host. Unlike existing approaches, it is designed to offer local file system semantics and performance. The new virtiofsd-rs Rust daemon Proxmox 8 uses, is receiving the most attention for new feature development.

Performance is very good (while testing, almost the same as on the Proxmox host)

VM Migration is not possible yet, but it's being worked on!

Job Control in ZSH and Bash

All processes in ZSH/Bash under job control are in 3 states: foregrounded, backgrounded and suspended.

# run command in the foreground
command
# run commend in the background

Usage

Export your data from Prometheus: https://github.com/VictoriaMetrics/VictoriaMetrics/blob/master/README.md#how-to-export-time-series
Run this script on the new data python3 delete_timeseries.py -i imported_file.json -o output_file.json --from [unix timestamp] --to [unix timestamp]
Delete original data from Prometheus: https://docs.victoriametrics.com/#how-to-delete-time-series
Import the converted data: https://github.com/VictoriaMetrics/VictoriaMetrics/blob/master/README.md#how-to-import-time-series-data

Note that the response cache must be deleted after these steps in order to remove previously cached results - see more details here.

Option 1 - Use This Bitcoin Fast Sync Command

There is no torrent which would be faster than just using the Bitcoin network "hive" - which is huge. There may be a way to sync using local or low-latency nodes nearby, but any time you specify which nodes you sync from - it introduces risk.

Very good to have a fast CPU and lots of RAM, SSD is not as important as RAM.

With this command I was able to download the entire blockchain and create all indices in almost exactly 24 hours:

bitcoind --datadir=<path-to-external-ssd> -blockfilterindex=1 -txindex=1 -coinstatsindex=1 -dbcache=16384 -daemon If you have 32GB of RAM, you can use 32768 for dbcache

	#!/bin/sh

	# This is a skeleton of a bash daemon. To use for yourself, just set the
	# daemonName variable and then enter in the commands to run in the doCommands
	# function. Modify the variables just below to fit your preference.

	daemonName="DAEMON-NAME"

	pidDir="."
	pidFile="$pidDir/$daemonName.pid"

	#!/usr/bin/env bash

	set -euo pipefail

	# confirm the version of Ubuntu is supported
	lsb_release -a
	# should show Ubuntu version 20 or higher

	# Update APT
	sudo apt-get update

	#!/usr/bin/env bash

	# This software is freely available under the Apache 2.0 license.
	# Full license available here: https://www.apache.org/licenses/LICENSE-2.0.txt

	set -o errexit
	set -o nounset
	set -o pipefail

	# Retry a command on a particular exit code, up to a max number of attempts,

	#!/bin/sh

	# /etc/config/show_wifi_clients.sh
	# Shows MAC, IP address and any hostname info for all connected wifi devices
	# written for openwrt 12.09 Attitude Adjustment

	echo "# All connected wifi devices, with IP address,"
	echo "# hostname (if available), and MAC address."
	echo -e "# IP address\tname\tMAC address"

	#!/bin/sh

	# show_wifi_clients.sh
	# Shows MAC, IP address and any hostname info for all connected wifi devices
	# modification based on https://openwrt.org/faq/how_to_get_a_list_of_connected_clients

	echo "# All connected wifi devices, with IP address,"
	echo "# hostname (if available), and MAC address."

	printf "%-15s %-15s %15s\n" "IP address" "Host" "MAC"

	/**
	* compile using this:
	* gcc -framework Carbon -framework Foundation ./hung.m -o hung
	*
	* Referenced from https://apple.stackexchange.com/a/424763/260619
	* Original source code https://github.com/jksoegaard/NonResponding
	* Original Author: jksoegaard
	**/

	#import <Foundation/Foundation.h>