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