Update 2025-04-13_15:16:39

lxc_create_container.sh

@@ -0,0 +1,108 @@
+#!/bin/bash
+# =============================================================================
+# Script Name: lxc_create_container.sh
+# Version: 1.1
+# Description: This script creates a new LXC container from a template, assigns
+#              a unique MAC address, updates the hostname and /etc/hosts file,
+#              and verifies internet access.
+# =============================================================================
+
+# Prompt for the new container hostname
+read -e -p "LXCHOSTNAME: " LXCHOSTNAME
+export LXCHOSTNAME
+
+# Check if the template container is running and stop it if necessary
+if lxc-info -n template | grep -q 'RUNNING'; then
+    echo "Stopping the template container..."
+    if ! lxc-stop -n template; then
+        echo "Failed to stop the template container."
+        exit 1
+    fi
+else
+    echo "Template container is not running."
+fi
+
+# Copy the template to create a new container with the given hostname
+echo "Creating a new container with hostname: $LXCHOSTNAME..."
+if ! lxc-copy -n template -N "$LXCHOSTNAME"; then
+    echo "Failed to copy the template container."
+    exit 1
+fi
+
+# Function to generate a unique MAC address
+generate_unique_hwaddr() {
+    local hwaddr
+    local existing_hwaddrs
+    while : ; do
+        hwaddr=$(printf '00:16:3e:%02x:%02x:%02x\n' $((RANDOM%256)) $((RANDOM%256)) $((RANDOM%256)))
+        existing_hwaddrs=$(grep "lxc.net.0.hwaddr" /var/lib/lxc/*/config | grep "$hwaddr")
+        if [ -z "$existing_hwaddrs" ]; then
+            # MAC address is unique
+            echo "$hwaddr"
+            return
+        fi
+    done
+}
+
+# Generate a unique MAC address
+NEW_HWADDR=$(generate_unique_hwaddr)
+
+# Path to the LXC configuration file
+CONFIG_FILE="/var/lib/lxc/$LXCHOSTNAME/config"
+
+# Replace the existing hwaddr line
+echo "Updating MAC address in $CONFIG_FILE to $NEW_HWADDR..."
+if ! sed -i "/^lxc.net.0.hwaddr/c\lxc.net.0.hwaddr = $NEW_HWADDR" "$CONFIG_FILE"; then
+    echo "Failed to update MAC address in $CONFIG_FILE."
+    exit 1
+fi
+
+# Start the new container
+echo "Starting the new container..."
+if ! lxc-start -n "$LXCHOSTNAME"; then
+    echo "Failed to start the container $LXCHOSTNAME."
+    exit 1
+fi
+
+# Wait for the container to start
+sleep 5
+
+# Change the hostname inside the container
+echo "Changing the hostname inside the container..."
+if ! lxc-attach -n "$LXCHOSTNAME" -- bash -c "echo '$LXCHOSTNAME' > /etc/hostname" || \
+   ! lxc-attach -n "$LXCHOSTNAME" -- hostname "$LXCHOSTNAME"; then
+    echo "Failed to set the hostname inside the container."
+    exit 1
+fi
+
+# Update /etc/hosts
+echo "Updating /etc/hosts inside the container..."
+if ! lxc-attach -n "$LXCHOSTNAME" -- bash -c "echo '127.0.0.1 $LXCHOSTNAME' >> /etc/hosts"; then
+    echo "Failed to update /etc/hosts inside the container."
+    exit 1
+fi
+
+# Ensure the container has internet access (optional)
+echo "Checking internet connectivity inside the container..."
+if ! lxc-attach -n "$LXCHOSTNAME" -- ping -c 4 google.com; then
+    echo "Container $LXCHOSTNAME does not have internet access."
+fi
+echo
+
+# Stop and restart the container
+echo "Restarting the container..."
+if ! lxc-stop -n "$LXCHOSTNAME" || ! lxc-start -n "$LXCHOSTNAME"; then
+    echo "Failed to restart the container $LXCHOSTNAME."
+    exit 1
+fi
+
+# Display the MAC addresses to verify the changes
+echo "Displaying the MAC addresses to verify the changes..."
+grep lxc.net.0.hwaddr /var/lib/lxc/*/config
+
+# Wait and list containers to ensure they are running
+sleep 9
+echo "Listing all containers..."
+lxc-ls -f
+
+echo "LXC container setup completed successfully."