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# wordpress_docker_vlab |
= README |
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Για να συνδεθούμε στην εικονική μηχανή τρέχουμε την εντολή. |
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[source, console] |
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---- |
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ssh user@<ip> |
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password: **** |
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---- |
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image::https://i.imgur.com/P4ViujF.png[] |
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[CAUTION] |
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Πρέπει να είστε συνδεδεμένοι στο https://wiki.noc.uniwa.gr/doku.php?id=vpn_service_openvpn[VPN - Πανεπιστημίου Δυτικής Αττικής] |
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== Τεχνολογίες |
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Για την υλοποίηση της εργασίας χρησιμοποιήθηκε η τεχνολογία *Docker* το οποίο εικονικοποιεί σε επίπεδο λειτουργικού συστήματος. |
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[source, console] |
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---- |
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sudo apt-get update |
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sudo apt install docker.io |
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sudo systemctl start docker |
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sudo systemctl enable docker |
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---- |
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[TIP] |
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Για να ελέγξουμε ότι η υπηρεσία του *Docker* λειτουργεί εκτελούμε την εντολή |
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[source, console] |
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---- |
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docker --version |
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---- |
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== Εκτέλεση Εργασίας |
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Αρχικά, δημιουργούμε το δικό μας image για τον *nginx* ανάλογα με τις ανάγκες της υπηρεσίας μας. |
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Το αποθηκεύουμε σε ένα αρχείο ονομάζοντας το [underline]#Dockerfile# |
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Επόμενο βήμα είναι η εκτέλεση της παρακάτω εντολής για τη δημιουργία του image |
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[source, console] |
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---- |
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docker build -f Dockerfile -t anginx . |
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---- |
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[NOTE] |
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==== |
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Οptions: |
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* -f προσδιορίζει το αρχείο για το build |
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* -t tag (το όνομα του image) |
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* "." είναι το current directory |
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==== |
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Όλα τα services τα οποία θα τρέξουν στην εργασία μας βρίσκονται στο αρχείο [underline]#docker-compose.yml# |
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Αναλυτικά: |
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=== Nginx |
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[source, yml] |
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---- |
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nginx: |
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image: anginx #image from docker building my Dockerfile (docker build -f Dockerfile -t anginx .) // <1> |
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container_name: production_nginx // <2> |
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volumes: // <3> |
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- /home/user/docker/nginx.conf:/etc/nginx/conf.d/default.conf |
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- /home/user/docker/cert.pem:/etc/nginx/public.crt |
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- /home/user/docker/key.pem:/etc/nginx/private.key |
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ports: // <4> |
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- 9080:80 |
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- 9443:443 |
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networks: // <5> |
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- main_net |
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---- |
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=== MariaDB |
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[source, yml] |
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---- |
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mariadb: |
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image: mariadb // <1> |
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container_name: mariadb // <2> |
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volumes: // <3> |
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- db_data:/var/lib/mysql |
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environment: // <8> |
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MYSQL_ROOT_PASSWORD: wordpress |
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MYSQL_DATABASE: wordpress |
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networks: // <5> |
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- main_net |
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---- |
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=== WordPress |
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[source, yml] |
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---- |
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wordpress: |
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image: wordpress:latest // <1> |
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container_name: wordpress // <2> |
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restart: always |
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deploy: #create replicas with specific resources // <6> |
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mode: replicated |
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replicas: 2 |
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# max_replicas_per_node: 1 |
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resources: |
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limits: #max resources |
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cpus: '0.50' |
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memory: 50M |
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reservations: #default resources |
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cpus: '0.25' |
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memory: 20M |
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ports: // <4> |
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- 80:80 |
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volumes: // <3> |
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- wp-app:/var/www/html |
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environment: // <8> |
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WORDPRESS_DB_HOST: mariadb:3306 |
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WORDPRESS_DB_NAME: wordpress |
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WORDPRESS_DB_USER: root |
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WORDPRESS_DB_PASSWORD: wordpress |
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networks: // <5> |
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- main_net |
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depends_on: // <7> |
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- mariadb |
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---- |
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=== PHPMyAdmin |
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[source, yml] |
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---- |
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phpmyadmin: |
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image: phpmyadmin/phpmyadmin // <1> |
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container_name: phpmyadmin // <2> |
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deploy: // <6> |
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mode: replicated |
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replicas: 2 |
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# max_replicas_per_node: 1 |
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resources: |
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limits: |
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cpus: '0.50' |
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memory: 50M |
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reservations: |
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cpus: '0.25' |
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memory: 20M |
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environment: // <8> |
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PMA_HOST: mariadb |
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MYSQL_ROOT_PASSWORD: wordpress |
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PMA_PORT: 3306 |
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ports: // <4> |
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- 8080:80 |
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networks: // <5> |
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- main_net |
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---- |
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=== Minio |
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[source, yml] |
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---- |
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minio1: |
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image: minio/minio:RELEASE.2020-04-10T03-34-42Z // <1> |
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hostname: minio1 |
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volumes: // <3> |
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- minio1-data:/export |
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ports: // <4> |
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- "9001:9000" |
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networks: // <5> |
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- minio_distributed |
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deploy: // <6> |
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restart_policy: |
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delay: 10s |
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max_attempts: 10 |
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window: 60s |
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placement: |
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constraints: |
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- node.labels.minio1==true |
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command: server http://minio{1...4}/export |
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environment: // <8> |
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MINIO_ACCESS_KEY: AKIAIOSFODNN7EXAMPLE |
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MINIO_SECRET_KEY: wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY |
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# secrets: |
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# - secret_key |
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# - access_key |
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healthcheck: |
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test: ["CMD", "curl", "-f", "http://localhost:9000/minio/health/live"] |
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interval: 30s |
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timeout: 20s |
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retries: 3 |
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---- |
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=== Configuration Options: |
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:nofooter: |
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<1> image: Το image file από το οποίο θα τρέξει το service |
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<2> container_name: Είναι το όνομα του service |
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<3> volumes: "Mount host paths or named volumes from our VM to the service" |
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<4> ports: Είναι τα ports τα οποία κάνουμε expose "στον έξω" κόσμο |
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<5> networks: Είναι το εικονικό δίκτυο στο οποίο θα τρέξει το service |
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<6> deploy: Κάνουμε specify τα resources και τον αριθμό των replicas που θα τρέξουν |
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<7> depends_on: "Express dependency between services" |
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<8> environment: "Add environment variables" |
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