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</style>
</head>
<body class="article data-line-1">
<div id="header">
<h1>README</h1>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph data-line-3">
<p>Για να συνδεθούμε στην εικονική μηχανή τρέχουμε την εντολή.</p>
</div>
<div class="listingblock data-line-6">
<div class="content">
<pre class="highlight"><code class="language-console" data-lang="console">ssh user@&lt;ip&gt;
password: ****</code></pre>
</div>
</div>
<div class="imageblock data-line-11">
<div class="content">
<img src="https://i.imgur.com/P4ViujF.png" alt="P4ViujF">
</div>
</div>
<div class="admonitionblock caution data-line-14">
<table>
<tr>
<td class="icon">
<div class="title">Caution</div>
</td>
<td class="content">
Πρέπει να είστε συνδεδεμένοι στο <a href="https://wiki.noc.uniwa.gr/doku.php?id=vpn_service_openvpn">VPN - Πανεπιστημίου Δυτικής Αττικής</a>
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1 data-line-16">
<h2 id="_τεχνολογίες">Τεχνολογίες</h2>
<div class="sectionbody">
<div class="paragraph data-line-18">
<p>Για την υλοποίηση της εργασίας χρησιμοποιήθηκε η τεχνολογία <strong>Docker</strong> το οποίο εικονικοποιεί σε επίπεδο λειτουργικού συστήματος.</p>
</div>
<div class="listingblock data-line-21">
<div class="content">
<pre class="highlight"><code class="language-console" data-lang="console">sudo apt-get update
sudo apt install docker.io
sudo systemctl start docker
sudo systemctl enable docker</code></pre>
</div>
</div>
<div class="admonitionblock tip data-line-29">
<table>
<tr>
<td class="icon">
<div class="title">Tip</div>
</td>
<td class="content">
Για να ελέγξουμε ότι η υπηρεσία του <strong>Docker</strong> λειτουργεί εκτελούμε την εντολή
</td>
</tr>
</table>
</div>
<div class="listingblock data-line-32">
<div class="content">
<pre class="highlight"><code class="language-console" data-lang="console">docker --version</code></pre>
</div>
</div>
</div>
</div>
<div class="sect1 data-line-36">
<h2 id="_εκτέλεση_εργασίας">Εκτέλεση Εργασίας</h2>
<div class="sectionbody">
<div class="paragraph data-line-38">
<p>Αρχικά, δημιουργούμε το δικό μας image για τον <strong>nginx</strong> ανάλογα με τις ανάγκες της υπηρεσίας μας.</p>
</div>
<div class="paragraph data-line-40">
<p>Το αποθηκεύουμε σε ένα αρχείο ονομάζοντας το <span class="underline">Dockerfile</span></p>
</div>
<div class="paragraph data-line-42">
<p>Επόμενο βήμα είναι η εκτέλεση της παρακάτω εντολής για τη δημιουργία του image</p>
</div>
<div class="listingblock data-line-45">
<div class="content">
<pre class="highlight"><code class="language-console" data-lang="console">docker build -f Dockerfile -t anginx .</code></pre>
</div>
</div>
<div class="admonitionblock note data-line-50">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
<div class="paragraph data-line-51">
<p>Οptions:</p>
</div>
<div class="ulist data-line-53">
<ul>
<li class="data-line-53">
<p>-f προσδιορίζει το αρχείο για το build</p>
</li>
<li class="data-line-54">
<p>-t tag (το όνομα του image)</p>
</li>
<li class="data-line-55">
<p>"." είναι το current directory</p>
</li>
</ul>
</div>
</td>
</tr>
</table>
</div>
<div class="paragraph data-line-58">
<p>Όλα τα services τα οποία θα τρέξουν στην εργασία μας βρίσκονται στο αρχείο <span class="underline">docker-compose.yml</span></p>
</div>
<div class="paragraph data-line-60">
<p>Αναλυτικά:</p>
</div>
<div class="sect2 data-line-62">
<h3 id="_nginx">Nginx</h3>
<div class="listingblock data-line-65">
<div class="content">
<pre class="highlight"><code class="language-yml" data-lang="yml">nginx:
image: anginx #image from docker building my Dockerfile (docker build -f Dockerfile -t anginx .) // <b class="conum">(1)</b>
container_name: production_nginx // <b class="conum">(2)</b>
volumes: // <b class="conum">(3)</b>
- /home/user/docker/nginx.conf:/etc/nginx/conf.d/default.conf
- /home/user/docker/cert.pem:/etc/nginx/public.crt
- /home/user/docker/key.pem:/etc/nginx/private.key
ports: // <b class="conum">(4)</b>
- 9080:80
- 9443:443
networks: // <b class="conum">(5)</b>
- main_net</code></pre>
</div>
</div>
</div>
<div class="sect2 data-line-80">
<h3 id="_mariadb">MariaDB</h3>
<div class="listingblock data-line-82">
<div class="content">
<pre class="highlight"><code class="language-yml" data-lang="yml">mariadb:
image: mariadb // <b class="conum">(1)</b>
container_name: mariadb // <b class="conum">(2)</b>
volumes: // <b class="conum">(3)</b>
- db_data:/var/lib/mysql
environment: // <b class="conum">(8)</b>
MYSQL_ROOT_PASSWORD: wordpress
MYSQL_DATABASE: wordpress
networks: // <b class="conum">(5)</b>
- main_net</code></pre>
</div>
</div>
</div>
<div class="sect2 data-line-95">
<h3 id="_wordpress">WordPress</h3>
<div class="listingblock data-line-97">
<div class="content">
<pre class="highlight"><code class="language-yml" data-lang="yml">wordpress:
image: wordpress:latest // <b class="conum">(1)</b>
container_name: wordpress // <b class="conum">(2)</b>
restart: always
deploy: #create replicas with specific resources // <b class="conum">(6)</b>
mode: replicated
replicas: 2
# max_replicas_per_node: 1
resources:
limits: #max resources
cpus: '0.50'
memory: 50M
reservations: #default resources
cpus: '0.25'
memory: 20M
ports: // <b class="conum">(4)</b>
- 80:80
volumes: // <b class="conum">(3)</b>
- wp-app:/var/www/html
environment: // <b class="conum">(8)</b>
WORDPRESS_DB_HOST: mariadb:3306
WORDPRESS_DB_NAME: wordpress
WORDPRESS_DB_USER: root
WORDPRESS_DB_PASSWORD: wordpress
networks: // <b class="conum">(5)</b>
- main_net
depends_on: // <b class="conum">(7)</b>
- mariadb</code></pre>
</div>
</div>
</div>
<div class="sect2 data-line-128">
<h3 id="_phpmyadmin">PHPMyAdmin</h3>
<div class="listingblock data-line-130">
<div class="content">
<pre class="highlight"><code class="language-yml" data-lang="yml">phpmyadmin:
image: phpmyadmin/phpmyadmin // <b class="conum">(1)</b>
container_name: phpmyadmin // <b class="conum">(2)</b>
deploy: // <b class="conum">(6)</b>
mode: replicated
replicas: 2
# max_replicas_per_node: 1
resources:
limits:
cpus: '0.50'
memory: 50M
reservations:
cpus: '0.25'
memory: 20M
environment: // <b class="conum">(8)</b>
PMA_HOST: mariadb
MYSQL_ROOT_PASSWORD: wordpress
PMA_PORT: 3306
ports: // <b class="conum">(4)</b>
- 8080:80
networks: // <b class="conum">(5)</b>
- main_net</code></pre>
</div>
</div>
</div>
<div class="sect2 data-line-155">
<h3 id="_minio">Minio</h3>
<div class="listingblock data-line-157">
<div class="content">
<pre class="highlight"><code class="language-yml" data-lang="yml">minio1:
image: minio/minio:RELEASE.2020-04-10T03-34-42Z // <b class="conum">(1)</b>
hostname: minio1
volumes: // <b class="conum">(3)</b>
- minio1-data:/export
ports: // <b class="conum">(4)</b>
- "9001:9000"
networks: // <b class="conum">(5)</b>
- minio_distributed
deploy: // <b class="conum">(6)</b>
restart_policy:
delay: 10s
max_attempts: 10
window: 60s
placement:
constraints:
- node.labels.minio1==true
command: server http://minio{1...4}/export
environment: // <b class="conum">(8)</b>
MINIO_ACCESS_KEY: AKIAIOSFODNN7EXAMPLE
MINIO_SECRET_KEY: wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY
# secrets:
# - secret_key
# - access_key
healthcheck:
test: ["CMD", "curl", "-f", "http://localhost:9000/minio/health/live"]
interval: 30s
timeout: 20s
retries: 3</code></pre>
</div>
</div>
</div>
<div class="sect2 data-line-189">
<h3 id="_configuration_options">Configuration Options:</h3>
<div class="colist arabic data-line-198">
<ol>
<li>
<p>image: Το image file από το οποίο θα τρέξει το service</p>
</li>
<li>
<p>container_name: Είναι το όνομα του service</p>
</li>
<li>
<p>volumes: "Mount host paths or named volumes from our VM to the service"</p>
</li>
<li>
<p>ports: Είναι τα ports τα οποία κάνουμε expose "στον έξω" κόσμο</p>
</li>
<li>
<p>networks: Είναι το εικονικό δίκτυο στο οποίο θα τρέξει το service</p>
</li>
<li>
<p>deploy: Κάνουμε specify τα resources και τον αριθμό των replicas που θα τρέξουν</p>
</li>
<li>
<p>depends_on: "Express dependency between services"</p>
</li>
<li>
<p>environment: "Add environment variables"</p>
</li>
</ol>
</div>
</div>
</div>
</div>
</div>
</body>
</html>