Add RET Upgrader script and README.md

upgrade_edge/README.md

@@ -0,0 +1,75 @@
+# Resilient Edge Toolstack "RET" Upgrader
+
+## Usage
+
+There are four environment variables to set in order for this to work:
+
+- `UPGRADE_TALOS` - Set to "true" if you want to upgrade Talos
+- `TALOS_VERSION` - The version of Talos you want to upgrade to
+- `UPGRADE_KUBERNETES` - Set to "true" if you want to upgrade Kubernetes
+- `KUBERNETES_VERSION` - The version of Kubernetes you want to upgrade to
+
+> :bulb: The versions of Talos and Kubernetes must be compatible with each other. Check the [Talos release notes](https://github.com/siderolabs/talos/releases)
+
+> :bulb: The version that will be upgraded to cannot be guarenteed to be the version that will be installed. The latest version that is available from the tool will be installed.
+
+
+Example:
+
+``` yaml
+          - name: UPGRADE_TALOS #Select if you want to upgrade Talos
+            value: "true"
+          - name: TALOS_VERSION #Select the version of Talos you want to upgrade to
+            value: "v1.4.8"
+          - name: UPGRADE_KUBERNETES #Select if you want to upgrade Kubernetes
+            value: "true"
+          - name: KUBERNETES_VERSION #Select the version of Kubernetes you want to upgrade to
+            value: "v1.27.4"
+```
+
+
+## Usage
+
+``` YAML
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: upgrade-edge
+  namespace: management
+spec:
+  backoffLimit: 0 
+  template:
+    spec:
+      containers:
+      - name: upgrade-edge-container
+        image: ghcr.io/eficode-academy/edgek8s-upgrade:latest
+        env:
+          # - name: UPGRADE_TALOS
+          #   value: "true"
+          - name: TALOS_VERSION
+            value: "v1.4.8"
+          - name: UPGRADE_KUBERNETES
+            value: "true"
+          - name: KUBERNETES_VERSION
+            value: "v1.27.4"
+        volumeMounts:
+        - mountPath: /var/run/secrets/talos.dev
+          name: talos-secrets
+        - mountPath: /opt/kubeconfig
+          name: kubeconfig-volume
+        - mountPath: /opt/talosconfig
+          name: talosconfig-volume
+      volumes:
+      - name: talos-secrets
+        secret:
+          secretName: management-deployment-talos-secrets
+      - name: kubeconfig-volume
+        secret:
+          defaultMode: 420
+          secretName: kubeconfig-secret
+      - name: talosconfig-volume
+        secret:
+          defaultMode: 420
+          secretName: talosconfig-secret
+      restartPolicy: Never
+```

upgrade_edge/upgrade_edge.sh

@@ -20,7 +20,7 @@ fi
 check_talos_version_existence() {
     local version_url="https://github.com/siderolabs/talos/releases/tag/${TALOS_VERSION}"
     if ! curl --output /dev/null --silent --head --fail "$version_url"; then
-        echo "Invalid Talos version: ${TALOS_VERSION}."
+        echo "Invalid Talos version specified in env variable: ${TALOS_VERSION}."
         exit 1
     fi
 }