Update initial draft for upgrade with Linux and Kubernetes

docs/public-networks/how-to/upgrade-node.md

@@ -6,28 +6,171 @@ tags:
   - public networks
 ---
 
+import Tabs from '@theme/Tabs';
+import TabItem from '@theme/TabItem';
+
 # Upgrade your Besu node
 
 When upgrading your Besu node, we recommend:
 
-- Using an orchestration method (for example, Ansible or Chef) to keep all nodes in sync with your desired configuration.
+- Preserving your node's data and configuration
+<!--- - Using an orchestration method  to keep all nodes in sync with your desired configuration. --->  
 - Storing your configuration under version control.
 
-## Ansible
 
-You can use the [Ansible role on Galaxy](https://galaxy.ansible.com/consensys/hyperledger_besu) directly or customize it to suit your needs.
+<Tabs>
+  <TabItem value="binary" label="Linux" default>
+
+### Upgrading on Linux
+
+1. Stop your Besu node:
+
+```bash
+sudo systemctl stop besu
+```
+
+2. Back up your data directory and configuration:
+
+```bash
+sudo cp -r /var/lib/besu/data /var/lib/besu/data.backup
+sudo cp /etc/besu/config.toml /etc/besu/config.toml.backup
+```
+
+3. Download and install the new version:
+
+```bash
+wget https://hyperledger.jfrog.io/artifactory/besu-binaries/besu/[VERSION]/besu-[VERSION].tar.gz
+tar -xvf besu-[VERSION].tar.gz
+sudo cp -r besu-[VERSION]/* /usr/local/bin/
+```
+
+4. Restart your node:
+
+```bash
+sudo systemctl start besu
+```
+
+ :::note
+ Keep your data directory (`/var/lib/besu/data`) intact during upgrades to maintain chain sync status.
+ :::
+
+  </TabItem>
+  <TabItem value="docker" label="Docker">
+
+### Upgrading with Docker
+
+1. Update your Docker image:
+
+```bash
+docker pull hyperledger/besu:latest
+```
+
+2. Stop current container:
+
+```bash
+docker stop besu-node
+```
+
+3. Start new container with updated image:
+
+```bash
+docker run -d \
+  --name besu-node \
+  -v besu-data:/opt/besu/data \
+  -v besu-config:/etc/besu \
+  hyperledger/besu:latest
+```
+
+Example `docker-compose.yml`:
+
+```yaml
+version: '3.8'
+services:
+  besu:
+    image: hyperledger/besu:latest
+    volumes:
+      - besu-data:/opt/besu/data
+      - besu-config:/etc/besu
+    ports:
+      - "8545:8545"
+      - "30303:30303"
+volumes:
+  besu-data:
+  besu-config:
+```
 
-Upgrade the Besu version on nodes by running the play with the new version. For more information, For more information, select **Read Me** on the [Ansible Galaxy Besu page](https://galaxy.ansible.com/consensys/hyperledger_besu).
+  </TabItem>
+  <TabItem value="kubernetes" label="Kubernetes">
 
-The playbook:
+### Upgrading in Kubernetes
 
-1. Stops Besu.
-1. Downloads the updated version.
-1. Applies any new configuration.
-1. Starts Besu.
+1. Update your deployment manifest with a new image version:
+
+```yaml
+spec:
+  containers:
+  - name: besu
+    image: hyperledger/besu:new-version
+```
+
+2. Apply the update:
+
+```bash
+kubectl apply -f besu-deployment.yaml
+```
+
+Example PVC configuration:
+
+```yaml
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: besu-data
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 1Ti
+```
+
+  </TabItem>
+</Tabs>
+
+## Post-upgrade verification
+
+1. Check node status:
+
+```bash
+curl -X POST --data '{"jsonrpc":"2.0","method":"eth_syncing","params":[],"id":1}' localhost:8545
+```
+
+2. Verify peer connections:
+
+```bash
+curl -X POST --data '{"jsonrpc":"2.0","method":"net_peerCount","params":[],"id":1}' localhost:8545
+```
 
 ## Find peers on restarting
 
 Nodes store known peers in the peer table. The peer table is not persisted to disk. When a node restarts, the node connects to the specified bootnodes and discovers other nodes through the peer discovery process. The node continues collecting data from where it left off before the restart (assuming there was no data corruption in a failure scenario).
 
 Before the node restarted, connected peers saved the node details in their peer tables. These peers can reconnect to the restarted node. The restarted node uses these peers and the bootnodes, to discover more peers. To ensure that the restarted node successfully rejoins the network, ensure you specify at least one operational bootnode.
+
+## Troubleshooting
+
+### Sync not progressing
+
+Verify that the node is properly connected to the bootnodes. Check the node logs to ensure that the connections are being established correctly.
+
+### Low peer count
+
+Ensure that your network connection is stable and that the required ports for peer discovery and communication are open and correctly forwarded.
+
+### API unavailable
+
+Check the configuration of your RPC endpoint to ensure it is set up correctly and accessible. Verify that the API service is running and the correct ports are being used.
+
+### Data corruption
+
+If you encounter data corruption, restore the node data from a known good backup. Ensure regular backups are in place to avoid data loss.