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| 1 | +use clap::Parser; |
| 2 | +use dotenv; |
| 3 | +use slayerfs::cadapter::client::ObjectClient; |
| 4 | +use slayerfs::cadapter::s3::{S3Backend, S3Config}; |
| 5 | +use slayerfs::chuck::chunk::ChunkLayout; |
| 6 | +use slayerfs::chuck::store::ObjectBlockStore; |
| 7 | +use slayerfs::fuse::mount::mount_vfs_unprivileged; |
| 8 | +use slayerfs::vfs::fs::VFS; |
| 9 | +use std::path::PathBuf; |
| 10 | +use tokio::signal; |
| 11 | + |
| 12 | +#[derive(Parser)] |
| 13 | +#[command(author, version, about, long_about = None)] |
| 14 | +struct Args { |
| 15 | + /// Configuration file path (e.g. slayerfs-sqlite.yml, slayerfs-etcd.yml) |
| 16 | + #[arg(short, long, default_value = "./slayerfs-sqlite.yml")] |
| 17 | + config: PathBuf, |
| 18 | + |
| 19 | + /// Mount point path |
| 20 | + #[arg(short, long, default_value = "/tmp/mount")] |
| 21 | + mount: PathBuf, |
| 22 | + |
| 23 | + /// Directory used to persist metadata artifacts (SQLite database, config, etc.) |
| 24 | + #[arg(long, default_value = "./slayerfs-meta")] |
| 25 | + meta_dir: PathBuf, |
| 26 | + |
| 27 | + /// Target S3 bucket name (can be overridden by S3_BUCKET env var) |
| 28 | + #[arg(long)] |
| 29 | + bucket: Option<String>, |
| 30 | + |
| 31 | + /// S3-compatible endpoint URL (can be overridden by S3_ENDPOINT env var) |
| 32 | + #[arg(long)] |
| 33 | + endpoint: Option<String>, |
| 34 | + |
| 35 | + /// Optional AWS region (can be overridden by AWS_REGION env var) |
| 36 | + #[arg(long)] |
| 37 | + region: Option<String>, |
| 38 | +} |
| 39 | + |
| 40 | +/// Process config file and adjust SQLite path to absolute path |
| 41 | +fn process_config_for_backend( |
| 42 | + config_content: &str, |
| 43 | + meta_dir: &std::path::Path, |
| 44 | +) -> Result<String, Box<dyn std::error::Error>> { |
| 45 | + let config: serde_yaml::Value = serde_yaml::from_str(config_content)?; |
| 46 | + |
| 47 | + if let Some(database) = config.get("database") { |
| 48 | + if let Some(db_type) = database.get("type").and_then(|t| t.as_str()) { |
| 49 | + match db_type { |
| 50 | + "sqlite" => { |
| 51 | + let db_path = meta_dir.join("metadata.db"); |
| 52 | + let sqlite_url = format!("sqlite://{}?mode=rwc", db_path.display()); |
| 53 | + |
| 54 | + let processed_config = format!( |
| 55 | + r#"database: |
| 56 | + type: sqlite |
| 57 | + url: "{}" |
| 58 | +"#, |
| 59 | + sqlite_url |
| 60 | + ); |
| 61 | + |
| 62 | + println!("SQLite database path: {}", db_path.display()); |
| 63 | + Ok(processed_config) |
| 64 | + } |
| 65 | + "postgres" | "etcd" => { |
| 66 | + println!("Using configured database backend: {}", db_type); |
| 67 | + Ok(config_content.to_string()) |
| 68 | + } |
| 69 | + _ => Err(format!("Unsupported database type: {}", db_type).into()), |
| 70 | + } |
| 71 | + } else { |
| 72 | + Err("Missing database.type field in config file".into()) |
| 73 | + } |
| 74 | + } else { |
| 75 | + Err("Missing database configuration in config file".into()) |
| 76 | + } |
| 77 | +} |
| 78 | + |
| 79 | +#[tokio::main] |
| 80 | +async fn main() -> Result<(), Box<dyn std::error::Error>> { |
| 81 | + // 加载 .env 文件 |
| 82 | + dotenv::dotenv().ok(); |
| 83 | + |
| 84 | + let format = tracing_subscriber::fmt::format().with_ansi(false); |
| 85 | + tracing_subscriber::fmt().event_format(format).init(); |
| 86 | + |
| 87 | + #[cfg(not(target_os = "linux"))] |
| 88 | + { |
| 89 | + eprintln!("This demo only works on Linux (requires FUSE support)."); |
| 90 | + eprintln!("If you're on Windows, please run under WSL/WSL2 or Linux host."); |
| 91 | + std::process::exit(2); |
| 92 | + } |
| 93 | + |
| 94 | + #[cfg(target_os = "linux")] |
| 95 | + { |
| 96 | + let args = Args::parse(); |
| 97 | + |
| 98 | + // 从环境变量获取配置，命令行参数优先 |
| 99 | + let bucket = args |
| 100 | + .bucket |
| 101 | + .or_else(|| std::env::var("S3_BUCKET").ok()) |
| 102 | + .ok_or("S3 bucket must be specified via --bucket or S3_BUCKET env var")?; |
| 103 | + |
| 104 | + let endpoint = args |
| 105 | + .endpoint |
| 106 | + .or_else(|| std::env::var("S3_ENDPOINT").ok()) |
| 107 | + .unwrap_or_else(|| "http://127.0.0.1:9000".to_string()); |
| 108 | + |
| 109 | + let region = args.region.or_else(|| std::env::var("AWS_REGION").ok()); |
| 110 | + |
| 111 | + println!("=== SlayerFS Persistence + S3 Demo ==="); |
| 112 | + println!("Environment variables loaded from .env file"); |
| 113 | + println!("Config file: {}", args.config.display()); |
| 114 | + println!("Metadata dir: {}", args.meta_dir.display()); |
| 115 | + println!("Mount point: {}", args.mount.display()); |
| 116 | + println!("S3 bucket: {}", bucket); |
| 117 | + println!("S3 endpoint: {}", endpoint); |
| 118 | + if let Some(ref region) = region { |
| 119 | + println!("S3 region: {}", region); |
| 120 | + } |
| 121 | + println!(); |
| 122 | + let config_file = args.config; |
| 123 | + let mount_point = args.mount; |
| 124 | + let meta_dir = args.meta_dir; |
| 125 | + |
| 126 | + println!("=== SlayerFS Persistence + S3 Demo ==="); |
| 127 | + println!("Environment variables loaded from .env file"); |
| 128 | + println!("Config file: {}", config_file.display()); |
| 129 | + println!("Metadata dir: {}", meta_dir.display()); |
| 130 | + println!("Mount point: {}", mount_point.display()); |
| 131 | + println!("S3 bucket: {}", bucket); |
| 132 | + println!("S3 endpoint: {}", endpoint); |
| 133 | + if let Some(ref region) = region { |
| 134 | + println!("S3 region: {}", region); |
| 135 | + } |
| 136 | + println!(); |
| 137 | + |
| 138 | + if !config_file.exists() { |
| 139 | + eprintln!( |
| 140 | + "Error: Config file {} does not exist", |
| 141 | + config_file.display() |
| 142 | + ); |
| 143 | + std::process::exit(1); |
| 144 | + } |
| 145 | + |
| 146 | + std::fs::create_dir_all(&mount_point).map_err(|e| { |
| 147 | + format!( |
| 148 | + "Cannot create mount point directory {}: {}", |
| 149 | + mount_point.display(), |
| 150 | + e |
| 151 | + ) |
| 152 | + })?; |
| 153 | + std::fs::create_dir_all(&meta_dir).map_err(|e| { |
| 154 | + format!( |
| 155 | + "Cannot create metadata directory {}: {}", |
| 156 | + meta_dir.display(), |
| 157 | + e |
| 158 | + ) |
| 159 | + })?; |
| 160 | + #[cfg(unix)] |
| 161 | + { |
| 162 | + use std::os::unix::fs::PermissionsExt; |
| 163 | + let permissions = std::fs::Permissions::from_mode(0o755); |
| 164 | + std::fs::set_permissions(&mount_point, permissions)?; |
| 165 | + } |
| 166 | + |
| 167 | + if std::fs::metadata(&mount_point) |
| 168 | + .map(|m| !m.is_dir()) |
| 169 | + .unwrap_or(false) |
| 170 | + { |
| 171 | + return Err(format!("Mount point {} is not a directory", mount_point.display()).into()); |
| 172 | + } |
| 173 | + |
| 174 | + if let Ok(entries) = std::fs::read_dir(&mount_point) { |
| 175 | + let count = entries.count(); |
| 176 | + if count > 0 { |
| 177 | + eprintln!( |
| 178 | + "Warning: Mount point {} is not empty, may already be mounted", |
| 179 | + mount_point.display() |
| 180 | + ); |
| 181 | + eprintln!("Please unmount first or use an empty directory"); |
| 182 | + eprintln!("Try: fusermount -u {}", mount_point.display()); |
| 183 | + return Err("Mount point not empty".into()); |
| 184 | + } |
| 185 | + } |
| 186 | + |
| 187 | + let config_content = std::fs::read_to_string(&config_file) |
| 188 | + .map_err(|e| format!("Cannot read config file: {}", e))?; |
| 189 | + |
| 190 | + let meta_work_dir = meta_dir.join(".slayerfs"); |
| 191 | + std::fs::create_dir_all(&meta_work_dir)?; |
| 192 | + |
| 193 | + let target_config_path = meta_work_dir.join("slayerfs.yml"); |
| 194 | + let processed_config = process_config_for_backend(&config_content, &meta_work_dir)?; |
| 195 | + std::fs::write(&target_config_path, processed_config)?; |
| 196 | + |
| 197 | + // AWS 环境变量已从 .env 文件加载 |
| 198 | + |
| 199 | + let config = slayerfs::meta::config::Config::from_file(&target_config_path) |
| 200 | + .map_err(|e| format!("Failed to load config file: {}", e))?; |
| 201 | + let meta = slayerfs::meta::factory::MetaStoreFactory::create_from_config(config) |
| 202 | + .await |
| 203 | + .map_err(|e| format!("Failed to initialize metadata storage: {}", e))?; |
| 204 | + |
| 205 | + let mut s3_config = S3Config { |
| 206 | + bucket: bucket.clone(), |
| 207 | + region: region.clone().or_else(|| Some("us-east-1".to_string())), |
| 208 | + part_size: 16 * 1024 * 1024, |
| 209 | + max_concurrency: 8, |
| 210 | + ..Default::default() |
| 211 | + }; |
| 212 | + s3_config.endpoint = Some(endpoint.clone()); |
| 213 | + s3_config.force_path_style = true; |
| 214 | + |
| 215 | + let s3_backend = S3Backend::with_config(s3_config) |
| 216 | + .await |
| 217 | + .map_err(|e| format!("Failed to create S3 backend: {}", e))?; |
| 218 | + let object_client = ObjectClient::new(s3_backend); |
| 219 | + let block_store = ObjectBlockStore::new(object_client); |
| 220 | + |
| 221 | + let layout = ChunkLayout::default(); |
| 222 | + let fs = VFS::new(layout, block_store, meta) |
| 223 | + .await |
| 224 | + .map_err(|e| format!("Failed to create VFS: {}", e))?; |
| 225 | + |
| 226 | + println!("Mounting filesystem..."); |
| 227 | + |
| 228 | + let handle = mount_vfs_unprivileged(fs, &mount_point) |
| 229 | + .await |
| 230 | + .map_err(|e| format!("Failed to mount filesystem: {}", e))?; |
| 231 | + |
| 232 | + println!( |
| 233 | + "SlayerFS with S3 backend successfully mounted at: {}", |
| 234 | + mount_point.display() |
| 235 | + ); |
| 236 | + println!("Press Ctrl+C to exit and unmount filesystem..."); |
| 237 | + |
| 238 | + signal::ctrl_c().await?; |
| 239 | + println!("\nUnmounting filesystem..."); |
| 240 | + |
| 241 | + handle.unmount().await?; |
| 242 | + println!("Filesystem unmounted"); |
| 243 | + Ok(()) |
| 244 | + } |
| 245 | +} |
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