Luis Jesús Díaz drconopoima

Feedback

I'm sure I've gotten multiple things wrong here. Either flat out wrong, anti-patterns or just sub-optimal. I'm new to prometheus, grafana and mtail...so please feel free to share corrections/suggestions.

Background

There are a handful of custom nginx stats exporters.

Some are tying into internal nginx stats like the official nginx exporter: nginx-prometheus-exporter

Signing VirtualBox Kernel Modules

These are the steps I followed enable VirtualBox on my laptop without disabling UEFI Secure Boot. They're nearly identical to the process described on [Øyvind Stegard's blog][blog], save for a few key details. The images here are borrowed from the [Systemtap UEFI Secure Boot Wiki][systemtap].

Install the VirtualBox package (this might be different for your platform).

src='https://download.virtualbox.org/virtualbox/rpm/fedora/virtualbox.repo'

curl -s -k \
  --cert ~/.minikube/client.p12 \
  --key  ~/.minikube/client.key \
  --pass tcuser \
  https://192.168.64.8:8443/api/v1/pods \
    |jq '.items[].metadata.name'

3 Virtual Machines Kubernetes cluster

Dependencies

You should install VirtualBox and Vagrant before you start.

Creating the cluster

You should create a Vagrantfile in an empty directory with the following content:

	#!/bin/bash

	# dochroot.sh: set up and enter chroot environment for a Gentoo install
	#
	# Copyright 2019 Stephen Cavilia <sac@atomicradi.us>
	#
	# This program is free software: you can redistribute it and/or modify
	# it under the terms of the GNU General Public License as published by
	# the Free Software Foundation, either version 3 of the License, or
	# (at your option) any later version.

	FROM debian:stable AS builder

	ENV MTAIL_VERSION=3.0.0-rc33

	RUN apt-get update && apt-get install -y --no-install-recommends \
	ca-certificates \
	curl && \
	curl -LsS -O https://github.com/google/mtail/releases/download/v${MTAIL_VERSION}/mtail_v${MTAIL_VERSION}_linux_amd64 && \
	mv mtail_v${MTAIL_VERSION}_linux_amd64 /usr/bin/mtail && \
	chmod 755 /usr/bin/mtail

	set -o pipefail
	set -o errtrace
	set -o nounset
	set -o errexit
	set -a

	# Scratch mount is the device which will be mounted on /mnt
	# and generally used for logs, core dumps etc.
	if ! $(mount \| grep -q /mnt) ; then
	# Detected NVME drives

	# Export current jobs to scripts
	Get-DbaAgentJob -SqlInstance $OldInstance \| Where-Object {-not $_.isenabled} \| ForEach-Object {Export-DbaScript $_ -Path (Join-Path -Path s:\Temp\2016Migration\DisabledJobs -Childpath "$($_.name.replace('\','$')).sql")};
	Get-DbaAgentJob -SqlInstance $OldInstance \| Where-Object {$_.isenabled} \| ForEach-Object {Export-DbaScript $_ -Path (Join-Path -Path s:\Temp\2016Migration\EnabledJobs -Childpath "$($_.name.replace('\','$')).sql")};

	# Get only the enabled job
	$JobsToCopy = Get-DbaAgentJob -SqlInstance $OldInstance -ExcludeDisabledJobs;

	# Copy the Operator(s) from the existing server
	Copy-DbaAgentOperator -Source $oldinstance -Destination $newinstance;

	IO Performance:
	--------------

	NCQ - Native Cmd Queueing - SATA II - 32 cmds

	TCQ - Tagged Cmd Queuing - SCSI 2 - 216 cmds possible (64 cmds supported by most disk queues)

	- Reordering of cmds when requests for sectors spaced far from one another.

	- attempts to reduce disk seek time and rotation latency by optimising order in which sectors are found.

	/dev/sdb1 /data/hdp01 xfs defaults,noatime,nodiratime,nobarrier 1 2
	/dev/sdc1 /data/hdp02 xfs defaults,noatime,nodiratime,nobarrier 1 2