add automatic dns updates

infrastructure/ddns/cronjob.yaml

@@ -0,0 +1,54 @@
+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: ddns-cronjob
+spec:
+  schedule: "0 6,18 * * *"
+  jobTemplate:
+    spec:
+      template:
+        spec:
+          containers:
+          - name: hello
+            image: curl
+            command:
+              - /bin/sh
+              - -c
+            args:
+              - >-
+                CURRENT_IP = $(curl -4 ifconfig.me)
+                &&
+                echo "Current IP: $CURRENT_IP"
+                &&
+                curl
+                --request PUT
+                --url https://api.cloudflare.com/client/v4/zones/$(CLOUDFLARE_ZONE_ID)/dns_records/$(CLOUDFLARE_DNS_RECORD_ID)
+                --header "Authorization: Bearer $(CLOUDFLARE_API_KEY)"
+                --header "Content-Type: application/json"
+                --data '{"content": "$(CURRENT_IP)", "name": "$(KLUSTER_DOMAIN)", "proxied": false, "type": "A"}'
+
+            env:
+              - name: CLOUDFLARE_ZONE_ID
+                valueFrom:
+                  secretKeyRef:
+                    name: cloudflare-keys
+                    key: CLOUDFLARE_ZONE_ID
+              - name: CLOUDFLARE_API_KEY
+                valueFrom:
+                  secretKeyRef:
+                    name: cloudflare-keys
+                    key: CLOUDFLARE_API_KEY
+              - name: CLOUDFLARE_DNS_RECORD_ID
+                valueFrom:
+                  secretKeyRef:
+                    name: cloudflare-keys
+                    key: CLOUDFLARE_DNS_RECORD_ID
+              - name: KLUSTER_DOMAIN
+                valueFrom:
+                  secretKeyRef:
+                    name: cloudflare-keys
+                    key: KLUSTER_DOMAIN
+              - name: CURRENT_IP
+                value: ???
+
+          restartPolicy: OnFailure