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Reset root/admin password

Lost the root/admin password? You can reset it using the command-line. Recipe adapted from gitlab issue #308.

# start the console
sudo gitlab-rails console

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Kubernetes on (vanilla) Raspbian Lite

Yes - you can create a Kubernetes cluster with Raspberry Pis with the default operating system called Raspbian. This means you can carry on using all the tools and packages you're used to with the officially-supported OS.

This is part of a blog post Serverless Kubernetes home-lab with your Raspberry Pis written by Alex Ellis.

Copyright disclaimer: Please provide a link to the post and give attribution to the author if you plan to use this content in your own materials.

Pre-reqs:

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#!/bin/sh

###
# SOME COMMANDS WILL NOT WORK ON macOS (Sierra or newer)
# For Sierra or newer, see https://github.com/mathiasbynens/dotfiles/blob/master/.macos
###

# Alot of these configs have been taken from the various places
# on the web, most from here
# https://github.com/mathiasbynens/dotfiles/blob/5b3c8418ed42d93af2e647dc9d122f25cc034871/.osx

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Quick and Dirty Ceph Cluster

This is a bare-bones guide on how to setup a Ceph cluster using ceph-ansible

This guide assumes:

• Ansible is installed on your local machine
• Eight Centos 7.2 nodes are provisioned and formatted with XFS
• You have ssh and sudo access to your nodes

Ansible Setup

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There are 3 plugins for generating to create a JAR-File in maven:

• maven-jar-plugin
• maven-assembly-plugin
• maven-shade-plugin

maven-jar-plugin:This plugin provides the capability to build and sign jars.But it just compiles the java files under src/main/java and /src/main/resources/.It doesn't include the dependencies JAR files.

<!--exclude all xml files from the jar-->
<plugin>
    <groupId>org.apache.maven.plugins</groupId>

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#!/usr/bin/perl
use Getopt::Long;
use Switch;
use Net::Statsd;
$Net::Statsd::HOST = 'stats.krn.krone.at';    # Default
$Net::Statsd::PORT = 8125;           # Default

%options = (
			'help' => 0,
			'cache' => 0,

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README

Services declared as oneshot are expected to take some action and exit immediatelly (thus, they are not really services, no running processes remain). A common pattern for these type of service is to be defined by a setup and a teardown action.

Let's create a example foo service that when started creates a file, and when stopped it deletes it.

Define setup/teardown actions

Create executable file /opt/foo/setup-foo.sh:

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Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

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---
- hosts: all
  gather_facts: no
  vars:
    string: "string"
    list:
      - item1
      - item2
    dict:
      key1: value1

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package systemd;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.nio.file.Files;
import java.nio.file.LinkOption;
import java.nio.file.Paths;
import java.util.function.Supplier;

@lombok.extern.slf4j.Slf4j