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# Delete all containers
docker rm $(docker ps -aq)
# Delete all images
docker rmi $(docker images -q)
# Delete all untagged images
docker rmi $(docker images -q --filter "dangling=true")
# Delete unused images
docker system prune --all

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MongoDB Practice

MongoDB Exercise in mongo shell

Connect to a running mongo instance, use a database named mongo_practice.

Document all your queries in a javascript file to use as a reference.

Insert Documents

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FROM php:7.2-rc-zts-alpine

ARG APP_USER_USERNAME=app

RUN apk update && apk add --no-cache \
    sudo bash \
    g++ make autoconf \
    libxml2-dev icu-dev curl-dev pcre-dev

RUN adduser -D -s /bin/bash $APP_USER_USERNAME \

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package main

import (
	"context"
	"flag"
	"log"
	"net"
	"net/http"
	"net/http/httputil"
	"net/url"

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# https://stackoverflow.com/a/17678331/2190689
function git-pull-all() {
    START=$(git symbolic-ref --short -q HEAD);
    for branch in $(git branch | sed 's/^.//'); do
        git checkout $branch;
        git pull ${1:-origin} $branch || break;
    done;
    git checkout $START;
};

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@version:3.2

# ===============================================================================================
# Configuration file for syslog-ng, customized for remote logging
# ===============================================================================================
# Options
# Note about $HOST / HOST
# Description: The name of the source host where the message originates from.
        # If the message traverses several hosts and the chain_hostnames() option is on, the first host in the chain is used.
        # If the keep_hostname() option is disabled (keep_hostname(no)), the value of the $HOST macro will be the DNS hostname of the host that sent the message to syslog-ng OSE (that is, the DNS hostname of the last hop). In this case the $HOST and $HOST_FROM macros will have the same value.

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Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

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Original solution here

• Create a file on /etc/systemd/system/docker.service.d/startup_options.conf

# /etc/systemd/system/docker.service.d/override.conf
[Service]
ExecStart=
ExecStart=/usr/bin/dockerd -H fd:// -H tcp://0.0.0.0:2376

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<?php

declare(strict_types = 1);

namespace App\Kafka;

use RdKafka;
use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;

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<?php

/**
 * Creating MongoDB like ObjectIDs.
 * Using current timestamp, hostname, processId and a incremting id.
 * 
 * @author Julius Beckmann
 */
function createMongoDbLikeId($timestamp, $hostname, $processId, $id)
{