Kubernetes: added multiple microservices

- added minio object storage
- added immich photo viewer
- added cloudnative-pg postgres operator for db management
- added cronjobs to run different maintenance tasks
- updated readme

kubernetes/cronjobs/update-dns/update_dns_configmap.yaml

@@ -0,0 +1,107 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: update-dns-script
+data:
+  update_dns.sh: |
+    #! /usr/bin/env bash
+    # This script updates a DNS record using the Cloudflare API.
+    set -euo pipefail
+
+    function get_my_ip() {
+        curl -s https://api.ipify.org
+    }
+
+    function get_zone_id() {
+        local zone_name="$1"
+        local api_token="${CLOUDFLARE_API_TOKEN}"
+
+        response=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones?name=${zone_name}" \
+            -H "Content-Type: application/json" \
+            -H "Authorization: Bearer ${api_token}")
+
+        if echo "$response" | grep -q '"success":true'; then
+            echo "$response" | jq -r '.result[0].id'
+        else
+            echo "Failed to retrieve zone ID for ${zone_name}. Response: $response"
+            exit 1
+        fi
+    }
+
+    function get_dns_record_id() {
+        local zone_id="$1"
+        local api_token="${CLOUDFLARE_API_TOKEN}"
+
+        response=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/${zone_id}/dns_records" \
+            -H "Content-Type: application/json" \
+            -H "Authorization: Bearer ${api_token}")
+
+        if echo "${response}" | grep -q '"success":true'; then
+            for record in $(echo "${response}" | jq -r '.result[] | select(.type=="A") | .id'); do
+                echo "${record}"
+                return
+            done
+        else
+            echo "Failed to retrieve DNS record ID for ${record_name}. Response: $response"
+            exit 1
+        fi
+    }
+
+    function update_dns_record() {
+        local zone_id="$1"
+        local record_id="$2"
+        local ip_address="$3"
+        local api_token="${CLOUDFLARE_API_TOKEN}"
+
+        local max_attempts=3
+        local attempt=1
+        local success=false
+
+        while [ $attempt -le $max_attempts ] && [ "$success" = false ]; do
+            if response=$(curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/${zone_id}/dns_records/${record_id}" \
+                -H "Content-Type: application/json" \
+                -H "Authorization: Bearer ${api_token}" \
+                -d '{
+                    "type": "A",
+                    "name": "tahmidcloud.com",
+                    "content": "'"${ip_address}"'",
+                    "ttl": 1,
+                    "proxied": false
+                }'); then
+                if echo "$response" | grep -q '"success":true'; then
+                    success=true
+                else
+                    echo "Attempt $attempt failed. Response: $response"
+                fi
+            fi
+
+            if [ "$success" = false ] ; then
+                if [ $attempt -lt $max_attempts ]; then
+                    echo "Retrying in 5 seconds..."
+                    sleep 5
+                fi
+                ((attempt++))
+            fi
+        done
+
+        if [ "$success" = false ]; then
+            echo "Failed to update DNS record after ${max_attempts} attempts"
+            exit 1
+        fi
+        echo "DNS record updated successfully to IP address: ${ip_address}"
+    }
+
+    function main() {
+        if [ -z "${CLOUDFLARE_API_TOKEN:-}" ]; then
+            echo "CLOUDFLARE_API_TOKEN environment variable is not set."
+            exit 1
+        fi
+
+        zone_id=$(get_zone_id "tahmidcloud.com")
+        record_id=$(get_dns_record_id "${zone_id}")
+        ip_address=$(get_my_ip)
+
+        update_dns_record "${zone_id}" "${record_id}" "${ip_address}"
+    }
+
+    main

kubernetes/cronjobs/update-dns/update_dns_cronjob.yaml

@@ -0,0 +1,33 @@
+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: update-dns-cronjob
+spec:
+  schedule: "15 * * * *"
+  concurrencyPolicy: Replace  # Add this line
+  jobTemplate:
+    spec:
+      template:
+        spec:
+          containers:
+          - name: cron-container
+            image: alpine/curl
+            command: ["/bin/sh", "-c"]
+            env:
+            - name: CLOUDFLARE_API_TOKEN
+              valueFrom:
+                secretKeyRef:
+                  name: cloudflare-secret
+                  key: api-token
+            args:
+              - apk add --no-cache bash jq curl &&
+                /script/update_dns.sh
+            volumeMounts:
+            - name: script-volume
+              mountPath: /script
+          volumes:
+          - name: script-volume
+            configMap:
+              name: update-dns-script
+              defaultMode: 0777
+          restartPolicy: OnFailure