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Cloud_Computing_Lab/Mongo_&_docker.html

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</head>
<body class="article toc2 toc-right">
<div id="header">
<h1>Εργασία Εξαμήνου</h1>
<div class="details">
<span id="author" class="author">Cse47455, Cse47138, Cse47682</span><br>
</div>
<div id="toc" class="toc2">
<div id="toctitle">Πίνακας περιεχομένων</div>
<ul class="sectlevel1">
<li><a href="#_σκοπός_εργασίας">1. Σκοπός εργασίας</a>
<ul class="sectlevel2">
<li><a href="#_αρχικοί_στόχοι">1.1. Αρχικοί στόχοι</a></li>
</ul>
</li>
<li><a href="#_δημιουργία_του_docker_compose_yaml">2. Δημιουργία του Docker-compose.yaml</a>
<ul class="sectlevel2">
<li><a href="#_δημιουργία_δικτύων">2.1. Δημιουργία Δικτύων</a></li>
<li><a href="#_δημιουργία_container">2.2. Δημιουργία Container</a>
<ul class="sectlevel3">
<li><a href="#_ονοματοδοσία">2.2.1. Ονοματοδοσία</a></li>
<li><a href="#_image">2.2.2. Image</a></li>
<li><a href="#_ports">2.2.3. Ports</a></li>
<li><a href="#_volumes">2.2.4. Volumes</a></li>
<li><a href="#_networks">2.2.5. Networks</a></li>
<li><a href="#_παράμετροι_deploy">2.2.6. Παράμετροι Deploy</a></li>
<li><a href="#_εντολή_έναρξης">2.2.7. Εντολή έναρξης</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#_σύνδεση_και_ενεργοποίηση_replica_set">3. Σύνδεση και ενεργοποίηση Replica Set</a></li>
<li><a href="#_μελλοντικοί_στόχοι">4. Μελλοντικοί στόχοι</a></li>
</ul>
</div>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p><br></p>
</div>
<!-- toc disabled -->
</div>
</div>
<div class="sect1">
<h2 id="_σκοπός_εργασίας">1. Σκοπός εργασίας</h2>
<div class="sectionbody">
<div class="paragraph text-justify">
<p>Η εργασία που επιλέχθηκε να πργματοποιηθεί στα πλαίσια του εργαστήρίου του μαθήματος Υ.Ν.Υ, ήταν η δημιουργία και η ανάπτυξη μία βάσης δεδομένων τύπου NoSQL, και
συγκεκριμένα η MongoDB με χρήση των εργαλέιων της πλατφόρμας <a href="docker.html">Docker</a>.</p>
</div>
<div class="sect2">
<h3 id="_αρχικοί_στόχοι">1.1. Αρχικοί στόχοι</h3>
<div class="paragraph text-justify">
<p>Στο ξεκίνημα της ανάλυσης και ανάπτυξης της εργασίας μας θέσαμε αρχικούς στόχους :</p>
</div>
<div class="ulist square">
<ul class="square">
<li>
<p>Σχετική εκμάθηση λειτουργίας της <a href="mongodb.html">MongoDB.</a></p>
</li>
<li>
<p>Δημιουργία Repica set.</p>
</li>
<li>
<p>Δημιουργία και ανάπτυξη εφαρμογής Minio.</p>
</li>
<li>
<p>Σύνδεση των παραπάνω ώς μία εικονικά ενιαία εφαρμογή για τον τελικό χρήστη.</p>
</li>
</ul>
</div>
<div class="imageblock text-center">
<div class="content">
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</div>
</div>
</div>
<div class="sect1">
<h2 id="_δημιουργία_του_docker_compose_yaml">2. Δημιουργία του Docker-compose.yaml</h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_δημιουργία_δικτύων">2.1. Δημιουργία Δικτύων</h3>
<div class="paragraph">
<p>Ξεκινήσαμε με την δημιουργία κατάλληλων δικτυώσεων.</p>
</div>
<div class="ulist square">
<ul class="square">
<li>
<p>Ένα δίκτυο για κάθε replica set (1 primary 2 secondary).</p>
</li>
<li>
<p>Ένα δίκτυο που θα βρίσκονται όλα τα primary μαζί.</p>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="_δημιουργία_container">2.2. Δημιουργία Container</h3>
<div class="paragraph text-justify">
<p>Δημιουργήθηκαν 12 container και ποιο συγκεκριμένα 4 Replica Set των 3 container έκαστος.<br>
Για κάθε μέλος του Replica Set δόθηκαν οι κατάλλήλες ρυθμίσεις για την προετοιμασία ένταξης του στην ομάδα του.</p>
</div>
<div class="admonitionblock note text-justify">
<table>
<tr>
<td class="icon">
<i class="fa icon-note" title="Note"></i>
</td>
<td class="content">
<strong><em>Το επιθυμητό αποτέλεσμα ήταν να δημιουργηθεί μιά δυναμική εφαρμογή κατα την οποία ο διαχειριστής
απλά θα επιλέγει τον αριθμό των replica set και όχι το στατικό αποτέλεσμα που καταλήξαμε.</em></strong>
</td>
</tr>
</table>
</div>
<div class="sect3">
<h4 id="_ονοματοδοσία">2.2.1. Ονοματοδοσία</h4>
<div class="paragraph">
<p>Σε κάθε container δόθηκε ένα μοναδικό όνομα κατάλληλο για την δική μας διευκόλυνση και ευκολία.<br></p>
</div>
<div class="ulist square">
<ul class="square">
<li>
<p>Primary1</p>
</li>
<li>
<p>secondary1_1</p>
</li>
<li>
<p>secondary1_2</p>
</li>
<li>
<p>Primary2</p>
</li>
<li>
<p>κοκ.</p>
</li>
</ul>
</div>
</div>
<div class="sect3">
<h4 id="_image">2.2.2. Image</h4>
<div class="paragraph">
<p>Ως docker image του κάθε container επιλέχθηκε το official MongoDB image που υπήρχε στο Docker Hub.<br>
mongo:</p>
</div>
</div>
<div class="sect3">
<h4 id="_ports">2.2.3. Ports</h4>
<div class="paragraph text-justify">
<p>Σε κάθε container αντιστοιχήθηκε η port 27017 με μία port του εκάστοτε host που έτρεχε και για δική μας ευκολία έγινε πάλι ομαδοποίηση ανά replica set.</p>
</div>
<div class="ulist square">
<ul class="square">
<li>
<p>Primary1 = 10001</p>
</li>
<li>
<p>secondary1_1 = 10002</p>
</li>
<li>
<p>secondary1_2 = 10003</p>
</li>
<li>
<p>Primary2 = 20001</p>
</li>
<li>
<p>κοκ.</p>
</li>
</ul>
</div>
</div>
<div class="sect3">
<h4 id="_volumes">2.2.4. Volumes</h4>
<div class="paragraph text-justify">
<p>Δημιουργήθηκε σε όλο το σμήνος που είχαμε ένας φάκελος με τα απαράιτητα αρχεία και έγινε mount σε κάθε container<br></p>
</div>
<div class="literalblock text-left">
<div class="content">
<pre>./sys_files:/sys_files</pre>
</div>
</div>
</div>
<div class="sect3">
<h4 id="_networks">2.2.5. Networks</h4>
<div class="paragraph text-justify">
<p>Δόθηκαν οι κατάλληλες ρυθμίσεις για την ένταξη του στο ανάλογο δίκτυο. Έτσι το κάθε primary που γίνεται deploy
ανήκει σε 2 δίκτυα ( το δίκτυο των Primary και το δίκτυο του Replica set) ενώ τα secondary μόνο στο δίκτυο της Replica που ακήκουν.</p>
</div>
<div class="literalblock">
<div class="content">
<pre>primary_network:
replica_setΧ_network:</pre>
</div>
</div>
</div>
<div class="sect3">
<h4 id="_παράμετροι_deploy">2.2.6. Παράμετροι Deploy</h4>
<div class="paragraph">
<p>Στις παραμέτρους του Deploy χρησιμοποιήσαμε την πολιτική Restart με καθυστέρηση 10 δευτερολέπτων, μέγιστο αριθμό επαναλήψεων 10 και με κενό μεταξύ τους 60 δευτερόλεπτα.<br></p>
</div>
<div class="literalblock">
<div class="content">
<pre>restart_policy:
delay: 10s
max_attempts: 10
window: 60s</pre>
</div>
</div>
</div>
<div class="sect3">
<h4 id="_εντολή_έναρξης">2.2.7. Εντολή έναρξης</h4>
<div class="paragraph text-justify">
<p>Για εντολή έναρξης της βάσης δοκιμάστην διάφορες επιλογές όπως command,
Entrypoint, αλλά ενώ κάποιες επιλογές εξυπηρετούσαν τον σκοπό τους ταυτόχρονα δημιουργούσαν πρόβλημα σε κάποιες άλλες. Έτσι καταλληξαμε στην χρήση την εντολής command
με χρήση ορισμάτων μόνος ως προς την ονοματοδοδία και την ενεργοποίησει του Replica Set</p>
</div>
<div class="literalblock">
<div class="content">
<pre>command: ["mongod", "--replSet", "rep-setX"]</pre>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_σύνδεση_και_ενεργοποίηση_replica_set">3. Σύνδεση και ενεργοποίηση Replica Set</h2>
<div class="sectionbody">
<div class="paragraph text-justify">
<p>Για την σύνδεση και την ενεργοποίηση των replica set δημιουργήθηκε ένα script το οποίο ελέγχει ένα προς ένα όλα τα container είναι ενεργοποιημένα,
στην συνέχεια αφού ολοκληρώσει τον πρώτο έλεγχο συνεχίζει ελέγχοντας εάν ήταν επιτυχές το ανέβασμα της διεργασίας Mongod σε κάθε container και τέλος
εάν δεν συναντήσει κάποιο πρόβλημα στα παραπάνω προχωράει στην σύνδεση των κατάλληλων container για την δημιουργία των Replica set.</p>
</div>
<div class="admonitionblock tip">
<table>
<tr>
<td class="icon">
<i class="fa icon-tip" title="Tip"></i>
</td>
<td class="content">
Τα ονόματα των μελών του swarm και οι διευθύνσεις IP που έχουν, τα ονόματα των container, καθώς και μία οπτική αναπαράσταση των δικτύων μπορεί να βρεθεί στον παρακάτω συνδεσμο:<br>
</td>
</tr>
</table>
</div>
<div class="paragraph text-center">
<p><a href="http://83.212.77.43:5555/">Project Dashboard</a></p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_μελλοντικοί_στόχοι">4. Μελλοντικοί στόχοι</h2>
<div class="sectionbody">
<div class="paragraph text-justify">
<p>Τέλος θα θέλαμε να συμπληρώσουμε ότι λόγο της πίεσης που δημιουργήθηκε απο τις τελευταίες εξελίξεις ως προς την έκβαση αυτού του εξαμήνου δεν ήταν δυνάτο
να γίνει μία ποιο δομημένη και εμπεριστατωμένη ανάτπυξη της εργάσιας πάρα το μεγάλο ενδιαφέρον που μας προξένησε.
Θα γίνει προσπάθεια συνέχισης του αλλά και ολοκλήρωσης του ανεξάρτητα του μαθήματος, αλλά και ανεξάρτητα απο το εάν
θα συνέχιστει η παροχή των υπολογιστικών πόρων απο τον Ωκεανό.</p>
</div>
</div>
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