cloudinit.sh

#!/bin/bash

LOG_FILE="/var/log/install_syncthing.log"
exec > >(tee -i $LOG_FILE)
exec 2>&1

echo "Starting the Syncthing installation."

# 1. Define variables
DOWNLOAD_DIR="/home/opc"
CONFIG_PATH="/home/opc/.local/state/syncthing/config.xml"

# Bucket related variables
S3FS_CREDENTIALS_FILE="${s3fs_credentials_file}"
ACCESS_KEY_ID="${access_key_id}"
SECRET_ACCESS_KEY="${secret_access_key}"
BUCKET_NAME="${bucket_name}"
MOUNT_POINT="/home/opc/logging"
REGION="${region}"
NAMESPACE="${namespace}"

echo "Configuring Syncthing config file"

# 2. Download and Install Syncthing

echo "Setting download directory to $DOWNLOAD_DIR"
cd $DOWNLOAD_DIR || { echo "Error: Failed to change directory to $DOWNLOAD_DIR"; exit 1; }

echo "Downloading Syncthing..."
curl -LO $(curl -s https://api.github.com/repos/syncthing/syncthing/releases/latest | grep browser_download_url | grep linux-amd64 | cut -d '"' -f 4)
if [ $? -ne 0 ]; then
    echo "Error: Failed to download Syncthing."
    exit 1
fi
echo "Syncthing downloaded to $DOWNLOAD_DIR"

echo "Extracting Syncthing..."
tar -xzf syncthing-linux-amd64*.tar.gz

# Verify the extracted directory exists
EXTRACTED_DIR=$(find . -maxdepth 1 -type d -name "syncthing-linux-amd64*" | head -n 1)
if [ -z "$EXTRACTED_DIR" ]; then
    echo "Error: Extracted directory not found."
    exit 1
fi
echo "Syncthing extracted to $EXTRACTED_DIR"

if [ -f "$EXTRACTED_DIR/syncthing" ]; then
    sudo mv $EXTRACTED_DIR/syncthing /usr/local/bin/
    if [ $? -ne 0 ]; then
        echo "Error: Failed to move Syncthing binary to /usr/local/bin."
        exit 1
    fi
    sudo chmod +x /usr/local/bin/syncthing
else
    echo  "Error: Syncthing binary not found in extracted directory."
    exit 1
fi

echo "Verifying Syncthing installation..."
if ! which syncthing > /dev/null 2>&1; then
    log "Error: Syncthing binary not found in PATH. Exiting."
    exit 1
fi

echo "Syncthing installation completed successfully. Version:"
export HOME=/home/opc
syncthing --version

# 3. Start Syncthing for Initial Setup
echo "Starting Syncthing for initial setup as the current user..." 
nohup sudo -u opc /usr/local/bin/syncthing >> "$LOG_FILE" 2>&1 &

if [ $? -ne 0 ]; then
    echo "Error: Failed to start Syncthing."
    exit 1
fi

echo "Waiting for Syncthing to generate the configuration file..." 
for i in {1..40}; do  # Wait for up to 40 seconds
    if [ -f "$CONFIG_PATH" ]; then
        echo "Configuration file generated: $CONFIG_PATH"
        break
    fi
    sleep 1
done

# Check if the file still doesn't exist after waiting
if [ ! -f "$CONFIG_PATH" ]; then
    echo "Error: Configuration file was not generated within the timeout period."
    exit 1
fi

# Function to clean up previous Syncthing processes
stop_syncthing() {
    echo "Stopping Syncthing..."
    PIDS=$(pgrep -f /usr/local/bin/syncthing)
    if [ -n "$PIDS" ]; then
        echo "Found Syncthing processes: $PIDS"
        sudo kill -9 $PIDS 2>/dev/null
        sleep 3
        echo "All Syncthing processes stopped."
    else
        echo "No running Syncthing processes found."
    fi
}

# Stop Syncthing safely before exiting
stop_syncthing

# 4. Modify or Add the <gui> Section in config.xml
echo "Checking if the Syncthing configuration file exists at $CONFIG_PATH..."

if [ -f "$CONFIG_PATH" ]; then
    echo "Found configuration file: $CONFIG_PATH"
    
    if grep -q "<gui[[:space:]]" "$CONFIG_PATH"; then  # Fix: Detect <gui> with attributes
        echo "The <gui> section exists. Modifying it..."
        if grep -q "<address>" "$CONFIG_PATH"; then
            sed -i 's|<address>.*</address>|<address>0.0.0.0:8384</address>|' "$CONFIG_PATH"
        else
            echo "No <address> tag found in <gui>. Adding it..."
            sed -i '/<gui[[:space:]]/a \    <address>0.0.0.0:8384</address>' "$CONFIG_PATH"
        fi
    else
        echo "The <gui> section is missing. Adding it to the configuration..."
        sed -i '/<\/configuration>/i \
    <gui>\n        <address>0.0.0.0:8384</address>\n    </gui>' "$CONFIG_PATH"
    fi

    echo "Configuration updated. Verifying changes..."
    grep -A 5 "<gui" "$CONFIG_PATH"
else
    echo "Error: Configuration file not found at $CONFIG_PATH."
    exit 1
fi

# 5. Open Firewall Port
echo "Configuring firewall to have port 8384 accessible."
sudo systemctl stop firewalld
sudo firewall-offline-cmd --zone=public --add-port=8384/tcp
sudo systemctl start firewalld

# 6. Start Syncthing in Detached Mode and Wait
echo "Starting Syncthing in detached mode..."
nohup sudo -u opc /usr/local/bin/syncthing > /var/log/install_syncthing.log 2>&1 &
if [ $? -ne 0 ]; then
    echo "Error: Failed to start Syncthing."
    exit 1
fi

echo "Waiting 10 seconds for Syncthing to initialize..."
sleep 10

# 7. Verify Syncthing is Listening
echo "Verifying that Syncthing is listening on port 8384..."
if ss -tuln | grep -q ':8384'; then
    echo "Success: Syncthing is running and listening on port 8384."
else
    echo "Error: Syncthing is not listening on port 8384. Check logs for more details."
    tail -n 20 /var/log/install_syncthing.log
    exit 1
fi

echo "Syncthing installation complete. Please allow up to 90 seconds for the Web UI to start."

echo "Starting installation of S3FS-Fuse..."

# 8. Install s3fs
# Install required dependencies
sudo yum install automake fuse fuse-devel gcc-c++ git libcurl-devel libxml2-devel make openssl-devel -y

# Clone the S3FS repository as opc user
sudo -u opc git clone https://github.com/s3fs-fuse/s3fs-fuse.git /home/opc/s3fs-fuse

# Navigate to the cloned directory
cd /home/opc/s3fs-fuse || { echo "Error: Failed to enter s3fs-fuse directory"; exit 1; }

# Compile and install S3FS
echo "Compiling S3FS-Fuse..."
sudo -u opc ./autogen.sh
sudo -u opc ./configure
sudo -u opc make
sudo make install

# Verify installation
if [ -f "/usr/local/bin/s3fs" ]; then
    echo "S3FS installed successfully!"
    ls /usr/local/bin/s3fs
else
    echo "Error: S3FS installation failed."
    exit 1
fi

echo "S3FS-Fuse installation completed."

echo "Creating S3FS credentials file..."

# Write the credentials to the S3FS password file
echo "$ACCESS_KEY_ID:$SECRET_ACCESS_KEY" | sudo tee $S3FS_CREDENTIALS_FILE > /dev/null

# Set correct permissions
sudo chmod 600 $S3FS_CREDENTIALS_FILE
sudo chown opc:opc $S3FS_CREDENTIALS_FILE

# Verify the file exists
if [ -f "$S3FS_CREDENTIALS_FILE" ]; then
    echo "S3FS credentials file created successfully."
else
    echo "Error: Failed to create S3FS credentials file."
    exit 1
fi

# 9. Mount the bucket as FS to the VM

# Ensure the mount point exists
if [ ! -d "$MOUNT_POINT" ]; then
    echo "Creating mount point: $MOUNT_POINT"
    sudo mkdir -p $MOUNT_POINT
    sudo chown opc:opc $MOUNT_POINT
    sudo chmod 755 $MOUNT_POINT
fi

# Mount the bucket
echo "Mounting the OCI Object Storage bucket..."
sudo /usr/local/bin/s3fs $BUCKET_NAME $MOUNT_POINT \
    -o endpoint=$REGION \
    -o passwd_file=$S3FS_CREDENTIALS_FILE \
    -o url=https://$NAMESPACE.compat.objectstorage.$REGION.oraclecloud.com/ \
    -o nomultipart \
    -o use_path_request_style \
    -o allow_other