Add postgres backup

postgres_backup/job.yml

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+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: mysql-backup
+spec:
+  template:
+    spec:
+      containers:
+      - name: mysql-backup
+        image: mariadb:latest
+        command: [ "/bin/sh" ]
+        args: [ "-c", "sleep 3600" ]
+        env:
+        - name: MYSQL_HOST
+          value: galera-mariadb-galera
+        - name: MYSQL_USER
+          value: backupuser
+        - name: MYSQL_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: backupscrets
+              key: backupsecret
+        volumeMounts:
+        - name: backup-volume
+          mountPath: /backup
+          subPath: mysql
+        - name: backup-script
+          mountPath: /backup-script.sh
+          subPath: backup-script.sh
+          readOnly: true
+      restartPolicy: OnFailure
+      volumes:
+      - name: backup-volume
+        nfs: 
+          server: 192.168.86.86
+          path: /volume1/backupk8s
+      - name: backup-script
+        configMap:
+          name: backup-script
+  backoffLimit: 1
+

postgres_backup/pv_nas.yml

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+apiVersion: v1
+kind: PersistentVolume
+metadata:
+  name: nfs-backup-mysql
+spec:
+  capacity:
+    storage: 1Mi
+  accessModes:
+    - ReadWriteMany
+  nfs:
+    server: 192.168.86.86
+    path: "/volume1/backupk8s/mysql/"
+  storageClassName: nfs

postgres_backup/script.sh

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+#!/bin/bash
+
+# Set default values
+PG_USER=${PG_USER:-postgres}
+PG_PASSWORD=${PG_PASSWORD:-postgres}
+PG_HOST=${PG_HOST:-localhost}
+PG_PORT=${PG_PORT:-5432}
+
+# Set backup directory
+BACKUP_DIR="/data/backups/postgres"
+
+# Generate backup timestamp with format "YYYY-MM-DD_HH-MM-SS"
+TIMESTAMP=$(date +"%Y-%m-%d_%H-%M-%S")
+
+# Set backup file name with timestamp
+BACKUP_FILE="${BACKUP_DIR}/pg_dump_all_${TIMESTAMP}.sql.gz"
+
+# Dump all databases to backup file
+pg_dumpall --clean --if-exists --dbname=postgres --username="${PG_USER}" --host="${PG_HOST}" --port="${PG_PORT}" | gzip >"${BACKUP_FILE}"
+
+# Set retention periods
+WEEKLY_THRESHOLD=$(date --date="-1 week" +"%s")
+MONTHLY_THRESHOLD=$(date --date="-1 month" +"%s")
+YEARLY_THRESHOLD=$(date --date="-1 year" +"%s")
+
+# Rename backups that are old enough to weekly, monthly, or yearly
+find $BACKUP_DIR -maxdepth 1 -type f -name "*.gz" -not -name "*weekly*" \ 
+-not -name "*monthly*" -not -name "*yearly*" \ 
+-mtime +7 -mtime -28 -exec mv -f {} ${BACKUP_DIR}/pg_dump_all_weekly.sql.gz \; # move daily backups older than 7 days to weekly backups
+find $BACKUP_DIR -maxdepth 1 -type f -name "*.gz" -not -name "*monthly*" \ 
+-not -name "*yearly*" -mtime +28 -mtime -365 \ 
+-exec mv -f {} ${BACKUP_DIR}/pg_dump_all_monthly.sql.gz \; # move weekly backups older than 28 days to monthly backups
+find $BACKUP_DIR -maxdepth 1 -type f -name "*.gz" -not -name "*yearly*" \ 
+-mtime +365 -exec mv -f {} ${BACKUP_DIR}/pg_dump_all_yearly.sql.gz \; # move monthly backups older than 365 days to yearly backups
+
+# Clean up backups older than retention periods
+find $BACKUP_DIR -maxdepth 1 -type f -name "*.gz" \ 
+-mtime +7 -mtime -28 -not -name "*weekly*" -not -name "*monthly*" -exec rm -f {} + # remove daily backups older than 7 days but exclude those that are weekly or monthly backups
+find $BACKUP_DIR -maxdepth 1 -type f -name "*.gz" \ 
+-mtime +28 -mtime -365 -not -name "*monthly*" -not -name "*yearly*" -exec rm -f {} + # remove weekly backups older than 28 days but exclude those that are monthly or yearly backups
+find $BACKUP_DIR -maxdepth 1 -type f -name "*.gz" \ 
+-mtime +365 -not -name "*yearly*" -exec rm -f {} + # remove monthly backups older than 365 days but exclude those that are yearly backups
+
+# Print confirmation message
+echo "Done. Backup file: ${BACKUP_FILE}"