Shadowing-Übung: Provision LEMP with Ansible on a Raspberry Pi Cluster (Pi Dramble #4) - Englisch Sprechen Lernen mit Video
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Welcome to the Raspberry Pi Dramble cluster video series.
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In this video, I'm going to show you how you can use Ansible to install all the software
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that you need onto this Raspberry Pi cluster so that you can run a Drupal 8 website on it.
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The first step after setting up all the networking is to make sure
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that your computer and Ansible can communicate with all the Raspberry Pis using the IP addresses that we had set up.
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So the first thing that I'm going to do is I'm going to make sure
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that I can ping all the servers from Ansible.
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And what this command is doing is saying look at all the servers in the inventory file
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that I specified and run the ping module which basically pings the server and checks and makes sure it can connect.
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And in this case it's saying that it can connect to all of them so that's good.
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I'll show you the inventory file really quick.
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Note that this one's a little more complicated than the one that I showed you in the networking video.
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This one shows you that I've split up the the different servers by the balancer, which is this one on the top, and then the web servers,
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which is these two, the second and third Raspberry Pis, and then the database servers, which is the last two, the master and then the slave or the replica.
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So once I've set up that inventory file and made sure that I can communicate with the servers,
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I'm ready to run the Ansible playbook that'll deploy all the software that's needed.
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So I'm going to go to the Provision the Raspberry Pi page here
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and it gives me two commands I need to run.
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First I need to make sure that I install all the Ansible Galaxy requirements.
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So I run this command, I already did that, and I also need to make sure
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that I have a config.yaml file which has all the specific settings for my cluster.
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So I've already copied this example.config.yaml file over to config.yaml, and I've tweaked a few settings to my likings.
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Once that's done, I can run this ansible playbook command, which is going to run a bunch of different task lists
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that will install all the software that you need on all the Raspberry Pis.
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One of the cool things about using ansible is, since I've already told it about all the servers that I have, I can run commands like this,
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which will check how much RAM is free on each of the Raspberry Pis using the free command.
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Once I've described everything to Ansible, then Ansible can do everything for me instead of me having to log in to each of the servers.
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If you want to find out more about how to use Ansible this way, and why you'd want to use Ansible,
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I have another video that I'll link called Ansible one-on-one on a cluster of Raspberry Pis.
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I also wrote a book on it, Ansible for DevOps, if you're interested in diving deeper.
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But for now I'm going to take this command and let it run.
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While it's running I'll kind of briefly explain what it's doing
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and then I'll let it run while the video is sped up since it takes a while to run.
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So first of all it's calling this main.yaml file.
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This file includes three different files, one file that runs on the balancer, one file that runs on the database servers, and one file that runs on the web servers.
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So let's take a quick look at the database playbook.
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If I look here, it loads some variables from these different files.
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It makes sure that there's a certain piece of software installed on the Raspberry Pi, the sudo package.
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Then it will set up a firewall, it sets up some security settings, it installs and configures MySQL for the database server,
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and it also installs Munin node which is software used to monitor the server.
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And then there's also some scripts in a custom role I have
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that installs a few scripts to control the LEDs on the front.
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notice that the LEDs right now are all turned off, but through the course of this playbook, LEDs will start turning on,
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like this one just turned on as the configuration for the balancer just finished.
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So I have some scripts that will control the LEDs from software
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and I'll show you how those are used at the end of the playbook run.
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Now that everything's finished, you'll notice that the LEDs in all the Pies, except for the two web servers at this point, are turned on and green.
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That means that they're ready to go and that I could install Drupal on them next.
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Before I get to that though,
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I'll show you how the balancer is actually balancing the request to these other two servers by loading the site www.pydramble.com,
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which is what I've configured in my config.yaml file.
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If I go here, it's actually going to send a request to this first server, and the first server is going to balance that request to one of the other two servers.
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So if I hit enter, you'll see that there is a red and a red on this one, and if I refresh the page, it's actually going to send the request to this server.
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And you'll see that every time I send a request, it always goes to the load balancer,
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and then the balancer sends the requests alternately to one of these two servers.
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So at this point it's saying file not found
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which basically means I don't have Drupal installed on the Pi Dramble cluster yet.
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Thank you.
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Wortschatz und Sprechhinweise zu dieser Lektion
Diese Sprechübung auf Niveau C1 basiert auf dem Video „Provision LEMP with Ansible on a Raspberry Pi Cluster“. Diese Wörter kommen am häufigsten vor: server, file, ansible, Raspberry, install. Dieses Video enthält 58 Sätze und 974 Wörter zum Nachsprechen. Der gesprochene Teil dauert 5:41. Der Sprecher spricht in natürlichem Tempo, etwa 172 Wörter pro Minute, ähnlich wie im Alltagsgespräch. Nur 76 % der Wörter gehören zu den 3.000 häufigsten im Englischen, der Wortschatz ist also anspruchsvoll.
Wichtiger Wortschatz in diesem Video
Die 12 anspruchsvollsten Wörter aus dem Video, mit Aussprache und Bedeutung:
| Wort | Aussprache | Bedeutung |
|---|---|---|
| cluster Substantiv | /ˈklʌstɚ/ | Anhäufung, Büschel |
| ping Verb | /pɪŋ/ | pingen |
| configure Verb | /kənˈfɪɡə(ɹ)/ | konfigurieren |
| alternately Adverb | /ˈɔl.tɚ.nət.li/ | abwechselnd, wechselweise |
| firewall Substantiv | /ˈfaɪ(ə)ɹˌwɔl/ | Brandmauer, Brandwand |
| refresh Verb | /ɹɪˈfɹɛʃ/ | erfrischen, erquicken |
| replica Substantiv | /ˈɹɛplɪkə/ | Nachbildung, exakte Kopie |
| deploy Verb | /dɪˈplɔɪ/ | aufstellen, formieren |
| specify Verb | /ˈspɛs.əˌfaɪ/ | spezifizieren |
| module Substantiv | /ˈmɑd͡ʒul/ | Modul |
| configuration Substantiv | /kənˌfɪɡ.əˈɹeɪ̯.ʃən/ | Konfiguration |
| liking Substantiv | /ˈlaɪkɪŋ/ | Geschmack, Interesse |
Phrasal Verbs, die du hören wirst
| Wort | Aussprache | Bedeutung |
|---|---|---|
| set up Verb | /ˌsɛt ˈʌp/ | aufbauen, für den Einsatz vorbereiten |
| find out Verb | herausfinden, erfahren | |
| turn off Verb | ausschalten, abschalten |
Grammatik in diesem Video
Die Strukturen, die der Sprecher am häufigsten verwendet, mit den genauen Worten aus dem Video:
| Struktur | Im Video |
|---|---|
| Present Perfect have/has + Partizip Perfekt – eine vergangene Handlung, die jetzt noch wichtig ist | I've split · I've set · I've already copied |
| Relativsätze who / which + Satz – eine Zusatzinformation über eine Person oder Sache | balancer, which is · servers, which is · file which has |
| Passiv be + Partizip Perfekt – wichtig ist, was geschieht, nicht wer es tut | is sped · are turned |
Aussprache, auf die du achten solltest
Der Sprecher verwendet 27 Kurzformen und abgeschwächte Formen, zum Beispiel I've, I'll, I'm. Sprich sie in der kurzen Form, so wie du sie hörst.
- Die Laute „sh“ und „zh“: refresh /ɹɪˈfɹɛʃ/, configuration /kənˌfɪɡ.əˈɹeɪ̯.ʃən/
- Lange Wörter – auf die Betonung achten: alternately /ˈɔl.tɚ.nət.li/, configuration /kənˌfɪɡ.əˈɹeɪ̯.ʃən/
Laute, die Deutschsprachigen schwerfallen:
- Stimmhafter Auslaut — /b/, /d/, /g/, /z/, /v/ am Wortende nicht verhärten: config /ˌkənˈfɪɡ/, node /noʊd/
- /æ/ — offener als „ä“: ansible /ˈæn.sɪ.bəl/, balancer /ˈbæ.lən.sɚ/
So übst du mit diesem Video
- Höre dir das ganze Video einmal an, ohne zu sprechen, und notiere die Wörter, die du nicht kennst.
- Beginne mit 0,75-facher Geschwindigkeit, sprich Satz für Satz nach und wechsle zur normalen Geschwindigkeit, sobald es leichtfällt.
- Nimm dich auf und vergleiche mit dem Original; achte dabei auf Wörter wie cluster, ping, configure.
Was ist die Shadowing-Technik?
Shadowing ist eine wissenschaftlich fundierte Sprachlerntechnik, die ursprünglich für die professionelle Dolmetscherausbildung entwickelt und durch den Polyglotten Dr. Alexander Arguelles populär gemacht wurde. Die Methode ist einfach aber wirkungsvoll: Du hörst englisches Audio von Muttersprachlern und wiederholst es sofort laut — wie ein Schatten, der dem Sprecher mit nur 1–2 Sekunden Verzögerung folgt. Anders als passives Hören oder Grammatikübungen zwingt Shadowing dein Gehirn und deine Mundmuskulatur, gleichzeitig echte Sprachmuster zu verarbeiten und zu reproduzieren. Studien zeigen, dass es Aussprachegenauigkeit, Intonation, Rhythmus, verbundene Sprache, Hörverständnis und Sprechflüssigkeit signifikant verbessert — was es zu einer der effektivsten Methoden für die IELTS Speaking-Vorbereitung und reale englische Kommunikation macht.