add support for upgrading edge cluster

.github/workflows/docker_build_upgrade_k8s.yml

@@ -0,0 +1,41 @@
+name: Build and Push Docker Upgrade-Edge image
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'upgrade_edge/Dockerfile'
+  pull_request:
+    branches:
+      - main
+    paths:
+      - 'upgrade_edge/Dockerfile'
+  workflow_dispatch:
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Log in to GitHub Container Registry
+      uses: docker/login-action@v3
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Build and push management image
+      uses: docker/build-push-action@v5
+      with:
+        context: .
+        file: ./upgrade_edge/Dockerfile
+        push: true
+        tags: ghcr.io/${{ github.repository_owner }}/edgek8s-upgrade:latest

README.md

@@ -20,6 +20,10 @@ Steps to perform:
 
 2. Run the ansible-playbook in the docker container
 
+Build the Dockerfile provided locally, this docker image is to be used as a provision image, the dot at the end is important
+
+```docker build -t eficode-academy/edgek8s-provision:latest .``` 
+
 Note: If talosctl apply-config fails with the error that the defined install_disk doesn't exist, run ```talosctl -n <controlplane_ip> disks --insecure``` to see what disks are available, see docs https://www.talos.dev/v1.6/introduction/getting-started/#modifying-the-machine-configs standard predefined in the playbook is /dev/sda but can differ.
 
 Note: Your host & the host you're deploying talos on needs to be able to reach eachother. 

upgrade_edge/Dockerfile

@@ -0,0 +1,7 @@
+FROM ghcr.io/eficode-academy/edgek8s-management
+
+COPY upgrade_edge.sh /opt/upgrade_edge.sh
+
+RUN chmod +x /opt/upgrade_edge.sh
+
+CMD ["/opt/upgrade_edge.sh"]

upgrade_edge/upgrade_edge.sh

@@ -0,0 +1,86 @@
+ #!/bin/bash
+
+      KUBECONFIG="/opt/kubeconfig/kubeconfig"
+      TALOSCONFIG="/opt/talosconfig/talosconfig"
+      SERVER_IP="192.168.1.109"
+      #UPGRADE_TALOS="true"
+      #TALOS_VERSION="v1.5.5"
+      #UPGRADE_KUBERENTES="true"
+
+if [[ "$UPGRADE_KUBERNETES" == "true" ]] || [[ "$UPGRADE_TALOS" == "true" ]]; then
+  echo "None of the variables UPGRADE_KUBERNETES or UPGRADE_TALOS has been set to true (true as a string, not a boolean), exiting without any upgrading"
+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: ${TALOS_VERSION}."
+        exit 1
+    fi
+}
+
+# Function to check talosctl version consistency
+check_talosctl_version() {
+
+
+    # Get client and server versions
+    client_version=$(talosctl version -n $SERVER_IP -e $SERVER_IP  | grep 'Client:' -A 1 | grep 'Tag:' | awk '{print $2}')
+    server_version=$(talosctl -e $SERVER_IP -n $SERVER_IP version | grep 'Server:' -A 2 | grep 'Tag:' | awk '{print $2}')
+
+
+    if [ "$client_version" != "$server_version" ]; then
+        echo "Version mismatch. Downloading server version of talosctl..."
+
+        # Formulate download URL
+        download_url="https://github.com/siderolabs/talos/releases/download/${server_version}/talosctl-linux-amd64"
+
+        # Download new version
+        #wget $download_url -O "talosctl-$server_version"
+        curl -Lo "talosctl-$server_version" "$download_url"
+
+        # Make it executable
+        chmod +x "talosctl-$server_version"
+    fi
+
+}
+
+# Upgrade Talos
+upgrade_talos() {
+    echo "Upgrading Talos..."
+
+    ./talosctl-"${server_version}" upgrade --nodes $SERVER_IP -e $SERVER_IP  \
+      --image ghcr.io/siderolabs/installer:${TALOS_VERSION} --preserve=true --stage
+}
+
+get_current_k8s_version() {
+    local version_string=$(kubectl get nodes -o jsonpath="{.items[0].status.nodeInfo.kubeletVersion}")
+    echo $version_string
+
+    #local current_version=$($version_string)
+    local major=$(echo $version_string | cut -d. -f1)
+    local minor=$(echo $version_string | cut -d. -f2)
+    local patch=$(echo $version_string | cut -d. -f3)
+    local next_minor=$((minor + 1))
+    echo "${major}.${next_minor}.${patch}"
+    NEXT_VERSION="${major}.${next_minor}.${patch}"
+}
+
+# Upgrade Kubernetes
+upgrade_kubernetes() {
+
+    echo "Upgrading Kubernetes to version $NEXT_VERSION..."
+    ./talosctl-"${server_version}" -n $SERVER_IP -e $SERVER_IP upgrade-k8s --to $NEXT_VERSION
+}
+
+if [ "$UPGRADE_TALOS" = "true" ] && [ "$UPGRADE_KUBERENTES" = "true" ]; then
+    echo "Cannot upgrade both Talos and Kubernetes at the same time."
+    exit 1
+elif [ "$UPGRADE_TALOS" = "true" ]; then
+    check_talos_version_existence
+    check_talosctl_version
+    upgrade_talos
+elif [ "$UPGRADE_KUBERENTES" = "true" ]; then
+    check_talosctl_version
+    get_current_k8s_version
+    upgrade_kubernetes
+fi