Practica final

exemples/practica-final/01-secret.yaml

@@ -4,4 +4,4 @@ metadata:
   name: credencials-bd
 type: Opaque
 data:
-  password: c3VwZXJzZWNyZXQ= # "supersecret" en base64
+  password: c3VwZXJzZWNyZXQ= # "supersecret" en base64

exemples/practica-final/02-pvcs.yaml

@@ -1,16 +1,5 @@
 apiVersion: v1
 kind: PersistentVolumeClaim
-metadata:
-  name: mariadb-pvc
-spec:
-  accessModes:
-    - ReadWriteOnce
-  resources:
-    requests:
-      storage: 2Gi
----
-apiVersion: v1
-kind: PersistentVolumeClaim
 metadata:
   name: wordpress-pvc
 spec:
@@ -18,4 +7,4 @@ spec:
     - ReadWriteOnce
   resources:
     requests:
-      storage: 2Gi
+      storage: 2Gi

exemples/practica-final/03-mariadb.yaml

@@ -1,37 +1,29 @@
-apiVersion: apps/v1
-kind: Deployment
+apiVersion: v1
+kind: ConfigMap
 metadata:
-  name: mariadb-deployment
-spec:
-  replicas: 1
-  selector:
-    matchLabels:
-      app: mariadb
-  template:
-    metadata:
-      labels:
-        app: mariadb
-    spec:
-      containers:
-      - name: mariadb
-        image: mariadb:lts-ubi
-        env:
-        - name: MARIADB_ROOT_PASSWORD
-          valueFrom:
-            secretKeyRef:
-              name: credencials-bd
-              key: password
-        - name: MARIADB_DATABASE
-          value: "wordpress"
-        ports:
-        - containerPort: 3306
-        volumeMounts:
-        - name: dades-bd
-          mountPath: /var/lib/mysql
-      volumes:
-      - name: dades-bd
-        persistentVolumeClaim:
-          claimName: mariadb-pvc
+  name: mariadb-configmap
+data:
+  primary.cnf: |
+    [mariadb]
+    log-bin
+    log-basename=my-mariadb
+
+  replica.cnf: |
+    [mariadb]
+    log-basename=my-mariadb
+
+  primary.sql: |
+    CREATE USER 'repluser'@'%' IDENTIFIED BY 'replsecret';
+    GRANT REPLICATION REPLICA ON *.* TO 'repluser'@'%';
+    CREATE DATABASE IF NOT EXISTS wordpress;
+
+  secondary.sql: |
+    CHANGE MASTER TO
+      MASTER_HOST='mariadb-sts-0.servei-mariadb.default.svc.cluster.local',
+      MASTER_USER='repluser',
+      MASTER_PASSWORD='replsecret',
+      MASTER_CONNECT_RETRY=10;
+    START SLAVE;
 ---
 apiVersion: v1
 kind: Service
@@ -44,3 +36,87 @@ spec:
     - protocol: TCP
       port: 3306
       targetPort: 3306
+  clusterIP: None
+---
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: mariadb-sts
+spec:
+  serviceName: "servei-mariadb"
+  replicas: 3
+  selector:
+    matchLabels:
+      app: mariadb
+  template:
+    metadata:
+      labels:
+        app: mariadb
+    spec:
+      initContainers:
+      - name: init-mariadb
+        image: mariadb:lts-ubi
+        command:
+        - bash
+        - "-c"
+        - |
+          set -ex
+          echo 'Starting init-mariadb'
+          ls /mnt/config-map
+          [[ `hostname` =~ -([0-9]+)$ ]] || exit 1
+          ordinal=${BASH_REMATCH[1]}
+          if [[ $ordinal -eq 0 ]]; then
+            cp /mnt/config-map/primary.cnf /etc/mysql/conf.d/server-id.cnf
+            cp /mnt/config-map/primary.sql /docker-entrypoint-initdb.d
+          else
+            cp /mnt/config-map/replica.cnf /etc/mysql/conf.d/server-id.cnf
+            cp /mnt/config-map/secondary.sql /docker-entrypoint-initdb.d
+          fi
+          echo server-id=$((3000 + ordinal)) >> /etc/mysql/conf.d/server-id.cnf
+          ls /etc/mysql/conf.d/
+          cat /etc/mysql/conf.d/server-id.cnf
+        volumeMounts:
+        - name: mariadb-config-map
+          mountPath: /mnt/config-map
+        - name: mariadb-config
+          mountPath: /etc/mysql/conf.d/
+        - name: initdb
+          mountPath: /docker-entrypoint-initdb.d
+      containers:
+      - name: mariadb
+        image: mariadb:lts-ubi
+        ports:
+        - containerPort: 3306
+          name: mariadb-port
+        env:
+        - name: MARIADB_ROOT_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: credencials-bd
+              key: password
+        - name: MYSQL_INITDB_SKIP_TZINFO
+          value: "1"
+        volumeMounts:
+        - name: datadir
+          mountPath: /var/lib/mysql
+        - name: mariadb-config
+          mountPath: /etc/mysql/conf.d/
+        - name: initdb
+          mountPath: /docker-entrypoint-initdb.d
+      volumes:
+      - name: mariadb-config-map
+        configMap:
+          name: mariadb-configmap
+      - name: mariadb-config
+        emptyDir: {}
+      - name: initdb
+        emptyDir: {}
+  volumeClaimTemplates:
+  - metadata:
+      name: datadir
+    spec:
+      accessModes:
+        - ReadWriteOnce
+      resources:
+        requests:
+          storage: 2Gi

exemples/practica-final/04-wordpress.yaml

@@ -17,16 +17,16 @@ spec:
         image: wordpress:latest
         env:
         - name: WORDPRESS_DB_HOST
-          value: "servei-mariadb" # Apunta al nom del Service de MariaDB
+          value: "mariadb-sts-0.servei-mariadb.default.svc.cluster.local" # Apunta al pod primari de MariaDB
         - name: WORDPRESS_DB_PASSWORD
           valueFrom:
             secretKeyRef:
               name: credencials-bd
               key: password
         - name: WORDPRESS_DB_USER
-          value: "root" 
+          value: "root"
         - name: WORDPRESS_DB_NAME
-          value: "wordpress" 
+          value: "wordpress"
         ports:
         - containerPort: 80
         volumeMounts:
@@ -47,4 +47,4 @@ spec:
   ports:
     - protocol: TCP
       port: 80
-      targetPort: 80
+      targetPort: 80

exemples/practica-final/README.md

@@ -1,29 +1,41 @@
 # Pràctica final
 
-Carpeta que agrupa els manifests per una pràctica completa (WordPress + MariaDB) amb secrets, PVCs, base de dades i ingress.
+Carpeta que agrupa els manifests per una pràctica completa de WordPress + MariaDB amb replicació.
+
+Aquesta pràctica desplega:
+- MariaDB en un `StatefulSet` de 3 rèpliques amb replicació.
+- WordPress connectat al node primari de MariaDB.
+- Un Ingress per exposar l'aplicació a `elmeublog.local`.
 
 Prerequisits
 - Controlador d'Ingress actiu (traefik, nginx-ingress, etc.).
-- `kubectl` configurat.
-- StorageClass per proveir PVCs.
+- `kubectl` configurat al cluster.
+- StorageClass disponible per proveir els PVCs.
+- Opcional: afegir `127.0.0.1 elmeublog.local` al teu `/etc/hosts` si fas servir un cluster local.
 
 Ordre d'aplicació recomanat
-1. `01-secret.yaml` — Crear `Secret` amb credencials.
-2. `02-pvcs.yaml` — Crear `PersistentVolumeClaim` per MariaDB i WordPress.
-3. `03-mariadb.yaml` — Desplegar MariaDB.
-4. `04-wordpress.yaml` — Desplegar WordPress connectat a MariaDB.
-5. `05-ingress.yaml` — Crear Ingress per exposar l'aplicació.
+1. `kubectl apply -f exemples/practica-final/01-secret.yaml`
+2. `kubectl apply -f exemples/practica-final/02-pvcs.yaml` # crea el PVC per WordPress
+3. `kubectl apply -f exemples/practica-final/03-mariadb.yaml`
+4. `kubectl apply -f exemples/practica-final/04-wordpress.yaml`
+5. `kubectl apply -f exemples/practica-final/05-ingress.yaml`
+
+Aquest ordre garanteix que el Secret i el volum de WordPress existeixin abans de desplegar MariaDB i WordPress. MariaDB crea els seus volums amb `volumeClaimTemplates` dins del `StatefulSet`.
 
 Com aplicar tot junt
 ```bash
 kubectl apply -f exemples/practica-final/install.yaml
 ```
 
+Accés
+- Navega a `http://elmeublog.local` després de desplegar l'Ingress.
+
 Neteja
 ```bash
 kubectl delete -f exemples/practica-final/install.yaml
 ```
 
 Notes
-- Revisa que els secrets (usuaris/contrassenyes) i les connexions (host/port) entre WordPress i MariaDB estiguin correctes abans d'executar la pràctica.
-- Si utilitzes hostnames en l'Ingress, afegeix les entrades corresponents al teu `/etc/hosts` o DNS de desenvolupament.
+- WordPress es connecta directament al pod primari de MariaDB: `mariadb-sts-0.servei-mariadb.default.svc.cluster.local`.
+- La MariaDB es desplega com a `StatefulSet` de 3 rèpliques amb configuració de primari/secundari.
+- Si l'Ingress no funciona, revisa que el controlador estigui actiu i que el host `elmeublog.local` estigui resoluble.

exemples/practica-final/install.yaml

@@ -8,17 +8,6 @@ data:
 ---
 apiVersion: v1
 kind: PersistentVolumeClaim
-metadata:
-  name: mariadb-pvc
-spec:
-  accessModes:
-    - ReadWriteOnce
-  resources:
-    requests:
-      storage: 2Gi
----
-apiVersion: v1
-kind: PersistentVolumeClaim
 metadata:
   name: wordpress-pvc
 spec:
@@ -28,40 +17,32 @@ spec:
     requests:
       storage: 2Gi
 ---
-apiVersion: apps/v1
-kind: Deployment
+apiVersion: v1
+kind: ConfigMap
 metadata:
-  name: mariadb-deployment
-spec:
-  replicas: 1
-  selector:
-    matchLabels:
-      app: mariadb
-  template:
-    metadata:
-      labels:
-        app: mariadb
-    spec:
-      containers:
-      - name: mariadb
-        image: mariadb:lts-ubi
-        env:
-        - name: MARIADB_ROOT_PASSWORD
-          valueFrom:
-            secretKeyRef:
-              name: credencials-bd
-              key: password
-        - name: MARIADB_DATABASE
-          value: "wordpress"
-        ports:
-        - containerPort: 3306
-        volumeMounts:
-        - name: dades-bd
-          mountPath: /var/lib/mysql
-      volumes:
-      - name: dades-bd
-        persistentVolumeClaim:
-          claimName: mariadb-pvc
+  name: mariadb-configmap
+data:
+  primary.cnf: |
+    [mariadb]
+    log-bin
+    log-basename=my-mariadb
+
+  replica.cnf: |
+    [mariadb]
+    log-basename=my-mariadb
+
+  primary.sql: |
+    CREATE USER 'repluser'@'%' IDENTIFIED BY 'replsecret';
+    GRANT REPLICATION REPLICA ON *.* TO 'repluser'@'%';
+    CREATE DATABASE IF NOT EXISTS wordpress;
+
+  secondary.sql: |
+    CHANGE MASTER TO
+      MASTER_HOST='mariadb-sts-0.servei-mariadb.default.svc.cluster.local',
+      MASTER_USER='repluser',
+      MASTER_PASSWORD='replsecret',
+      MASTER_CONNECT_RETRY=10;
+    START SLAVE;
 ---
 apiVersion: v1
 kind: Service
@@ -74,6 +55,90 @@ spec:
     - protocol: TCP
       port: 3306
       targetPort: 3306
+  clusterIP: None
+---
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: mariadb-sts
+spec:
+  serviceName: "servei-mariadb"
+  replicas: 3
+  selector:
+    matchLabels:
+      app: mariadb
+  template:
+    metadata:
+      labels:
+        app: mariadb
+    spec:
+      initContainers:
+      - name: init-mariadb
+        image: mariadb:lts-ubi
+        command:
+        - bash
+        - "-c"
+        - |
+          set -ex
+          echo 'Starting init-mariadb'
+          ls /mnt/config-map
+          [[ `hostname` =~ -([0-9]+)$ ]] || exit 1
+          ordinal=${BASH_REMATCH[1]}
+          if [[ $ordinal -eq 0 ]]; then
+            cp /mnt/config-map/primary.cnf /etc/mysql/conf.d/server-id.cnf
+            cp /mnt/config-map/primary.sql /docker-entrypoint-initdb.d
+          else
+            cp /mnt/config-map/replica.cnf /etc/mysql/conf.d/server-id.cnf
+            cp /mnt/config-map/secondary.sql /docker-entrypoint-initdb.d
+          fi
+          echo server-id=$((3000 + ordinal)) >> /etc/mysql/conf.d/server-id.cnf
+          ls /etc/mysql/conf.d/
+          cat /etc/mysql/conf.d/server-id.cnf
+        volumeMounts:
+        - name: mariadb-config-map
+          mountPath: /mnt/config-map
+        - name: mariadb-config
+          mountPath: /etc/mysql/conf.d/
+        - name: initdb
+          mountPath: /docker-entrypoint-initdb.d
+      containers:
+      - name: mariadb
+        image: mariadb:lts-ubi
+        ports:
+        - containerPort: 3306
+          name: mariadb-port
+        env:
+        - name: MARIADB_ROOT_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: credencials-bd
+              key: password
+        - name: MYSQL_INITDB_SKIP_TZINFO
+          value: "1"
+        volumeMounts:
+        - name: datadir
+          mountPath: /var/lib/mysql
+        - name: mariadb-config
+          mountPath: /etc/mysql/conf.d/
+        - name: initdb
+          mountPath: /docker-entrypoint-initdb.d
+      volumes:
+      - name: mariadb-config-map
+        configMap:
+          name: mariadb-configmap
+      - name: mariadb-config
+        emptyDir: {}
+      - name: initdb
+        emptyDir: {}
+  volumeClaimTemplates:
+  - metadata:
+      name: datadir
+    spec:
+      accessModes:
+        - ReadWriteOnce
+      resources:
+        requests:
+          storage: 2Gi
 ---
 apiVersion: apps/v1
 kind: Deployment
@@ -94,16 +159,16 @@ spec:
         image: wordpress:latest
         env:
         - name: WORDPRESS_DB_HOST
-          value: "servei-mariadb" # Apunta al nom del Service de MariaDB
+          value: "mariadb-sts-0.servei-mariadb.default.svc.cluster.local" # Apunta al pod primari de MariaDB
         - name: WORDPRESS_DB_PASSWORD
           valueFrom:
             secretKeyRef:
               name: credencials-bd
               key: password
         - name: WORDPRESS_DB_USER
-          value: "root" 
+          value: "root"
         - name: WORDPRESS_DB_NAME
-          value: "wordpress" 
+          value: "wordpress"
         ports:
         - containerPort: 80
         volumeMounts: