jakobii

Running a Minecraft Server with Docker on Ubuntu

Managing your Mincraft server with docker is a little bit nicer than just using the old "screen -r Mincraft" trick. docker can do snaphoting and auto restarting, and will allow you to think of the Mincraft server as a service, not just a java file that is being executed. Heres how I built mine. You should not have to edit the docker files. Just make sure you replace minecraft jar file version inside the code blocks when specified.

obviosly the only difference if your not using Ubuntu is the installation of java and the installation of docker

how to build it

Install all the things

jakobii

# You Should be able to Copy and Paste this into a powershell terminal and it should just work.
# To end the loop you have to kill the powershell terminal. ctrl-c wont work :/ 



# Http Server
$http = [System.Net.HttpListener]::new() 

# Hostname and port to listen on
$http.Prefixes.Add("http://localhost:8080/")

jakobii

On MS SQL Server

to Accurately calcutalte the age of something this works for most situations

SELECT
  FLOOR( --floor function returns age in years
    CAST( DATEDIFF( DAY, /*StartDate*/ , /*EndDate*/ ) AS DEC(38,16) ) / CAST(365.2425 AS DEC(38,16)) 
  ) As AgeInYears

FROM SomeTable

jakobii

message Double {
    oneof value {
        None none = 1;
        double some = 2;
    }
}
message Float {
    oneof value {
        None none = 1;
        float some = 2;

jakobii

#!/bin/bash
set -e

sudo rm -f server.req privkey.pem server.key server.crt

# https://www.postgresql.org/docs/11/ssl-tcp.html
openssl req -new -text -passout pass:abcd -subj /CN=localhost -out server.req -keyout privkey.pem
openssl rsa -in privkey.pem -passin pass:abcd -out server.key
openssl req -x509 -in server.req -text -key server.key -out server.crt
chmod og-rwx server.key

jakobii

Configure Server for SSL connections

Create certs

https://www.postgresql.org/docs/current/ssl-tcp.html

#!/bin/bash

mkdir ~/temp

jakobii

uuid regex in golang

• Playground
• Syntax

the straght forward answer

[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}

jakobii

https://www.cockroachlabs.com/docs/stable/start-a-local-cluster-in-docker-linux.html

create cluster

sudo docker network create -d bridge roachnet
sudo docker run -d --name=roach1 --hostname=roach1 --net=roachnet -p 26257:26257 -p 8080:8080  -v "${PWD}/cockroach-data/roach1:/cockroach/cockroach-data" cockroachdb/cockroach:v19.2.2 start --insecure --join=roach1,roach2,roach3
sudo docker run -d --name=roach2 --hostname=roach2 --net=roachnet -v "${PWD}/cockroach-data/roach2:/cockroach/cockroach-data" cockroachdb/cockroach:v19.2.2 start --insecure --join=roach1,roach2,roach3
sudo docker run -d --name=roach3 --hostname=roach3 --net=roachnet -v "${PWD}/cockroach-data/roach3:/cockroach/cockroach-data" cockroachdb/cockroach:v19.2.2 start --insecure --join=roach1,roach2,roach3

jakobii

# This is a scriptblock that will be invoked on the remote computer. This is 
# just dummy code that gets the computers hostname from the global built in 
# eniorment variable $env.
$RemoteTask = {
    param(
        [datetime]$Start
    )

    # pause remote script execition until the specified start time.
    # you can use this to loosely sync jobs execution.

jakobii

//https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Encoding

func writeOptimizedHttpResponse(w http.ResponseWriter, r *http.Request, b []byte, contentType string) {
	w.Header().Set("Content-Type", contentType)

	encodings := r.Header.Get("Accept-Encoding")

	switch {
	case strings.Contains(encodings, "gzip"):
		w.Header().Set("Content-Encoding", "gzip")