Carlos D. Álvaro cdalvaro

macOS Internals

Understand your Mac and iPhone more deeply by tracing the evolution of Mac OS X from prelease to Swift. John Siracusa delivers the details.

Starting Points

How to use this gist

You've got two main options:

Template name: telegram.message

Content:

{{- /* Telegram message to use: {{ template "telegram.message2" . }} */ -}}
{{ define "__alerts_list" -}}
{{ range . }}
{{if ne (index .Labels "alertname") "" -}}
{{ if eq .Status "firing" }}🔴{{ else }}🟢{{ end }}
    {{- if ne (index .Labels "severity") "" -}}
        <u><b>P{{ index .Labels "severity" }}</b></u> {{ end -}}

Using keepalived for node ingress and dns relaibility

This assumes you have installed a docker swarm

Introduction

When one has a docker swarm a container running on any node in the swarm can be accesed using any IP address of any swarm memeber.

For example if you had a single web server running on port 80, on one node of a swarm you could access the web server with any of the following IP addresses:

server1-ip:80
server2-ip:80

Template name: telegram.message

Content:

{{ define "alert_list" }}{{ range . }}{{ .Labels.alertname }}
{{ range .Annotations.SortedPairs }}<strong>{{ .Name }}</strong>: {{ .Value }}
{{ end }}| {{ if gt (len .GeneratorURL) 0 }}<a href="{{ .GeneratorURL }}">source</a> | {{ end }}{{ if gt (len .SilenceURL) 0 }}<a href="{{ .SilenceURL }}">silence</a> | {{ end }}{{ if gt (len .DashboardURL) 0 }}<a href="{{ .DashboardURL }}">dashboard</a> | {{ end }}{{ if gt (len .PanelURL) 0 }}<a href="{{ .PanelURL }}">panel</a> |{{ end }}
—
{{ end }}{{ end }}
{{ define "telegram.message" }}

{{ if gt (len .Alerts.Firing) 0 }}FIRING!!!

ZSH CheatSheet

This is a cheat sheet for how to perform various actions to ZSH, which can be tricky to find on the web as the syntax is not intuitive and it is generally not very well-documented.

Strings

Description	Syntax
Get the length of a string	`${#VARNAME}`
Get a single character	`${VARNAME[index]}`

About

Instructions to obtain WireGuard details of your NordVPN account. These can be used to setup a WireGuard tunnel on your router to NordVPN.

Source: https://forum.gl-inet.com/t/configure-wireguard-client-to-connect-to-nordvpn-servers/10422/27

Prerequisites

If you have any linux machine, use that or install a vm if you don't have one.

Get their official linux app installed. Make sure you have wireguard installed too. And set the used technology to Nordlynx by running nordvpn set technology nordlynx

	// A URLSession extension that fetches data from a URL and decodes to some Decodable type.
	// Usage: let user = try await URLSession.shared.decode(UserData.self, from: someURL)
	// Note: this requires Swift 5.5.
	extension URLSession {
	func decode<T: Decodable>(
	_ type: T.Type = T.self,
	from url: URL,
	keyDecodingStrategy: JSONDecoder.KeyDecodingStrategy = .useDefaultKeys,
	dataDecodingStrategy: JSONDecoder.DataDecodingStrategy = .deferredToData,
	dateDecodingStrategy: JSONDecoder.DateDecodingStrategy = .deferredToDate

	@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

	.tabbrowser-tab .tab-close-button {
	opacity: 0;
	margin-left: -4.5px !important;
	margin-right: 2px !important;
	}

	.tabbrowser-tab:not(:hover) .tab-close-button {
	display: none;

	input {
	udp {
	port => 10514
	type => unifi_syslog
	}
	}

	filter {
	if [type] == "unifi_syslog" {
	grok {