張旭 zx1986

How to use

$ docker compose -f acmesh.yaml up -d

.env

ACME_HOME_DIR=./acme.sh

Set up PMM Server v2

Let's start by creating entry for server in docker-compose.yaml:

version: '2'
# version 2 of docker-compose is not "old" version, it's the actual version,
# see below for explanation:
# https://stackoverflow.com/a/53636006/961092
services:

Problem

Installing mysql2 gem errors on MacOS Catalina with MySQL 5.7.

Solution

Make sure openssl is installed on Mac via Homebrew.

brew install openssl

CPU: percentage of limit

A lot of people land when trying to find out how to calculate CPU usage metric correctly in prometheus, myself included! So I'll post what I eventually ended up using as I think it's still a little difficult trying to tie together all the snippets of info here and elsewhere.

This is specific to k8s and containers that have CPU limits set.

To show CPU usage as a percentage of the limit given to the container, this is the Prometheus query we used to create nice graphs in Grafana:

sum(rate(container_cpu_usage_seconds_total{name!~".*prometheus.*", image!="", container_name!="POD"}[5m])) by (pod_name, container_name) /

Demystifying Docker Volumes for Mac and PC Users

Docker runs on a Linux kernel

Docker can be confusing to PC and Windows users because many tutorials on that topic assume you're using a Linux machine.

As a Linux user, you learn that Volumes are stored in a part of the host filesystem managed by Docker, and that is /var/lib/docker/volumes. When you're running Docker on a Windows or Mac OS machine, you will read the same documentation and instructions but feel frustrated as that path don't exist on your system. This simple note is my answer to that.

When you use Docker on a Windows PC, you're typically doing one of these two things:

Run Linux containers in a full Linux VM (what Docker typically does today)

	aggregationRule:
	clusterRoleSelectors:
	- matchLabels:
	rbac.authorization.k8s.io/aggregate-to-admin: "true"
	apiVersion: rbac.authorization.k8s.io/v1
	kind: ClusterRole
	metadata:
	annotations:
	rbac.authorization.kubernetes.io/autoupdate: "true"
	labels:

	# API Key 可以在以下頁面建立:
	# https://max.maicoin.com/api_tokens/new
	#
	MAX_API_KEY=
	MAX_API_SECRET=

	#!/bin/sh

	# Author: https://github.com/AlexCzar
	# License: Apache 2.0
	# This script can be used as a launcher for alacritty-inside-tabbed
	# It monitors window manager events and when detects that tabbed has
	# lost focus, script will minimize tabbed.
	# If alacritty-in-tabbed is not running, it will launch it, if it is
	# running but isn't focused, script will give it focus, if it is running
	# and is focused, script will minimize it.

	package main


	import (
	"github.com/prometheus/client_golang/prometheus"
	"github.com/prometheus/client_golang/prometheus/promhttp"
	"log"
	"math/rand"
	"net/http"
	"time"

	pre required SSH access

	## Download and install acme.sh
	acme.sh is a full implementation of a LetsEncrypt client but that doesn't depend on Python/pip/virtualenv/etc, and that doesn't require root -- exactly what we need, since we don't have root an a shared GoDaddy server, and we can't install new software outside of our home directory.

	`curl https://get.acme.sh \| sh`
	Now log out and SSH back in so acme.sh's install is complete in every way (include the Bash alias).

	##Get GoDaddy API Key
	Visit `https://developer.godaddy.com/keys/`