Make cluster setup more generic and flexible

- Accept list of lighthouse endpoints (DNS names or IPs)
- Remove specific HA setup references from README
- Add recommendation for redundant DNS in script prompts
- Add links to Nebula and GlusterFS documentation
- Support multiple lighthouse endpoints separated by commas
- More generic language suitable for any infrastructure setup

README.md

@@ -45,14 +45,14 @@ The installer will:
 
 ## Nullpoint Cluster
 
-Create or join a distributed storage cluster with Nebula mesh networking and GlusterFS. Start with a single node and scale up by adding more servers.
+Create or join a distributed storage cluster with [Nebula](https://github.com/slackhq/nebula) mesh networking and [GlusterFS](https://www.gluster.org/). Start with a single node and scale up by adding more servers.
 
 ```bash
 wget -qO- https://git.dominik-roth.eu/dodox/nullpoint/raw/branch/master/cluster-setup.sh | sudo bash
 ```
 
 - **Storage mounted at**: `/data/storage/` - all data replicated to all nodes
-- **Nebula mesh network** - encrypted overlay with certificate-based trust  
-- **DNS-based discovery** - use your existing HA setup (HAProxy/Keepalived)
-- **All nodes are lighthouses** - full redundancy, no single point of failure
-- **Simple secret sharing** - just `domain:port:ca_cert` to join
+- **Encrypted mesh network** - certificate-based trust with Nebula overlay
+- **Flexible lighthouse setup** - use DNS names or direct IPs
+- **All nodes are lighthouses** - full redundancy by default
+- **Simple secret sharing** - just share lighthouse endpoints and CA cert to join

cluster-setup.sh

@@ -132,10 +132,13 @@ create_cluster() {
     local hostname=$(hostname)
     local node_ip="192.168.100.1"
     
-    # Ask for lighthouse domain
-    read -p "Enter lighthouse domain (e.g., cluster.example.com): " lighthouse_domain
-    if [ -z "$lighthouse_domain" ]; then
-        echo -e "${RED}Lighthouse domain required!${NC}"
+    # Ask for lighthouse endpoints
+    echo -e "${YELLOW}Enter lighthouse endpoints (DNS names or IPs).${NC}"
+    echo -e "${YELLOW}Recommended: Use a DNS name with redundant backing for HA.${NC}"
+    echo -e "${YELLOW}You can enter multiple endpoints separated by commas.${NC}"
+    read -p "Lighthouse endpoints (e.g., cluster.example.com or 1.2.3.4,5.6.7.8): " lighthouse_endpoints
+    if [ -z "$lighthouse_endpoints" ]; then
+        echo -e "${RED}At least one lighthouse endpoint required!${NC}"
         exit 1
     fi
     
@@ -165,8 +168,8 @@ lighthouse:
   am_lighthouse: ${am_lighthouse}
   serve_dns: false
   interval: 60
-  hosts:
-    - "${lighthouse_domain}:${NEBULA_PORT}"
+  hosts:$(echo "$lighthouse_endpoints" | tr ',' '\n' | while read endpoint; do echo "
+    - \"${endpoint}:${NEBULA_PORT}\""; done)
 
 listen:
   host: 0.0.0.0
@@ -237,10 +240,10 @@ EOF
     echo -e "${GREEN}Cluster created successfully!${NC}"
     echo -e "${GREEN}════════════════════════════════════════${NC}\n"
     echo -e "Share this cluster secret with joining nodes:\n"
-    echo -e "${GREEN}${lighthouse_domain}:${NEBULA_PORT}:${ca_cert_b64}${NC}\n"
+    echo -e "${GREEN}${lighthouse_endpoints}:${NEBULA_PORT}:${ca_cert_b64}${NC}\n"
     echo -e "${YELLOW}Status:${NC}"
     echo "  - Nebula IP: ${node_ip}"
-    echo "  - Lighthouse domain: ${lighthouse_domain}:${NEBULA_PORT}"
+    echo "  - Lighthouse endpoints: ${lighthouse_endpoints}:${NEBULA_PORT}"
     echo "  - This node is lighthouse: ${am_lighthouse}"
     echo "  - GlusterFS volume: ${GLUSTER_VOLUME}"
     echo "  - Mount point: ${GLUSTER_MOUNT_PATH}"
@@ -254,7 +257,7 @@ join_cluster() {
     local my_ip=$(get_next_ip)
     
     # Get cluster details
-    read -p "Enter cluster secret (lighthouse_domain:port:ca_cert_base64): " cluster_secret
+    read -p "Enter cluster secret (lighthouse_endpoints:port:ca_cert_base64): " cluster_secret
     
     if [ -z "$cluster_secret" ]; then
         echo -e "${RED}Cluster secret required!${NC}"
@@ -262,7 +265,7 @@ join_cluster() {
     fi
     
     # Parse secret
-    lighthouse_domain=$(echo "$cluster_secret" | cut -d: -f1)
+    lighthouse_endpoints=$(echo "$cluster_secret" | cut -d: -f1)
     nebula_port=$(echo "$cluster_secret" | cut -d: -f2)
     ca_cert_b64=$(echo "$cluster_secret" | cut -d: -f3-)
     
@@ -297,8 +300,8 @@ pki:
 lighthouse:
   am_lighthouse: ${am_lighthouse}
   interval: 60
-  hosts:
-    - "${lighthouse_domain}:${nebula_port}"
+  hosts:$(echo "$lighthouse_endpoints" | tr ',' '\n' | while read endpoint; do echo "
+    - \"${endpoint}:${nebula_port}\""; done)
 
 listen:
   host: 0.0.0.0