MeiliSearch/meilisearch/src/lib.rs
2023-06-26 16:29:43 +02:00

486 lines
18 KiB
Rust

#![allow(rustdoc::private_intra_doc_links)]
#[macro_use]
pub mod error;
pub mod analytics;
#[macro_use]
pub mod extractors;
pub mod metrics;
pub mod middleware;
pub mod option;
pub mod routes;
pub mod search;
use std::fs::File;
use std::io::{BufReader, BufWriter};
use std::path::Path;
use std::sync::Arc;
use std::thread;
use std::time::Duration;
use actix_cors::Cors;
use actix_http::body::MessageBody;
use actix_web::dev::{ServiceFactory, ServiceResponse};
use actix_web::error::JsonPayloadError;
use actix_web::web::Data;
use actix_web::{web, HttpRequest};
use analytics::Analytics;
use anyhow::bail;
use error::PayloadError;
use extractors::payload::PayloadConfig;
use http::header::CONTENT_TYPE;
use index_scheduler::{IndexScheduler, IndexSchedulerOptions};
use log::error;
use meilisearch_auth::AuthController;
use meilisearch_types::milli::documents::{DocumentsBatchBuilder, DocumentsBatchReader};
use meilisearch_types::milli::update::{IndexDocumentsConfig, IndexDocumentsMethod};
use meilisearch_types::settings::apply_settings_to_builder;
use meilisearch_types::tasks::KindWithContent;
use meilisearch_types::versioning::{check_version_file, create_version_file};
use meilisearch_types::{compression, milli, VERSION_FILE_NAME};
pub use option::Opt;
use option::ScheduleSnapshot;
use crate::error::MeilisearchHttpError;
/// Default number of simultaneously opened indexes.
///
/// This value is used when dynamic computation of how many indexes can be opened at once was skipped (e.g., in tests).
///
/// Lower for Windows that dedicates a smaller virtual address space to processes.
///
/// The value was chosen this way:
///
/// - Windows provides a small virtual address space of about 10TiB to processes.
/// - The chosen value allows for indexes to use the default map size of 2TiB safely.
#[cfg(windows)]
const DEFAULT_INDEX_COUNT: usize = 4;
/// Default number of simultaneously opened indexes.
///
/// This value is used when dynamic computation of how many indexes can be opened at once was skipped (e.g., in tests).
///
/// The higher, the better for avoiding reopening indexes.
///
/// The value was chosen this way:
///
/// - Opening an index consumes a file descriptor.
/// - The default on many unices is about 256 file descriptors for a process.
/// - 100 is a little bit less than half this value.
/// - The chosen value allows for indexes to use the default map size of 2TiB safely.
#[cfg(not(windows))]
const DEFAULT_INDEX_COUNT: usize = 20;
/// Check if a db is empty. It does not provide any information on the
/// validity of the data in it.
/// We consider a database as non empty when it's a non empty directory.
fn is_empty_db(db_path: impl AsRef<Path>) -> bool {
let db_path = db_path.as_ref();
if !db_path.exists() {
true
// if we encounter an error or if the db is a file we consider the db non empty
} else if let Ok(dir) = db_path.read_dir() {
dir.count() == 0
} else {
true
}
}
pub fn create_app(
index_scheduler: Data<IndexScheduler>,
auth_controller: Data<AuthController>,
opt: Opt,
analytics: Arc<dyn Analytics>,
enable_dashboard: bool,
) -> actix_web::App<
impl ServiceFactory<
actix_web::dev::ServiceRequest,
Config = (),
Response = ServiceResponse<impl MessageBody>,
Error = actix_web::Error,
InitError = (),
>,
> {
let app = actix_web::App::new()
.configure(|s| {
configure_data(
s,
index_scheduler.clone(),
auth_controller.clone(),
&opt,
analytics.clone(),
)
})
.configure(routes::configure)
.configure(|s| dashboard(s, enable_dashboard));
let app = app.wrap(actix_web::middleware::Condition::new(
opt.experimental_enable_metrics,
middleware::RouteMetrics,
));
app.wrap(
Cors::default()
.send_wildcard()
.allow_any_header()
.allow_any_origin()
.allow_any_method()
.max_age(86_400), // 24h
)
.wrap(actix_web::middleware::Logger::default())
.wrap(actix_web::middleware::Compress::default())
.wrap(actix_web::middleware::NormalizePath::new(actix_web::middleware::TrailingSlash::Trim))
}
enum OnFailure {
RemoveDb,
KeepDb,
}
pub fn setup_meilisearch(opt: &Opt) -> anyhow::Result<(Arc<IndexScheduler>, Arc<AuthController>)> {
let empty_db = is_empty_db(&opt.db_path);
let (index_scheduler, auth_controller) = if let Some(ref snapshot_path) = opt.import_snapshot {
let snapshot_path_exists = snapshot_path.exists();
// the db is empty and the snapshot exists, import it
if empty_db && snapshot_path_exists {
match compression::from_tar_gz(snapshot_path, &opt.db_path) {
Ok(()) => open_or_create_database_unchecked(opt, OnFailure::RemoveDb)?,
Err(e) => {
std::fs::remove_dir_all(&opt.db_path)?;
return Err(e);
}
}
// the db already exists and we should not ignore the snapshot => throw an error
} else if !empty_db && !opt.ignore_snapshot_if_db_exists {
bail!(
"database already exists at {:?}, try to delete it or rename it",
opt.db_path.canonicalize().unwrap_or_else(|_| opt.db_path.to_owned())
)
// the snapshot doesn't exist and we can't ignore it => throw an error
} else if !snapshot_path_exists && !opt.ignore_missing_snapshot {
bail!("snapshot doesn't exist at {}", snapshot_path.display())
// the snapshot and the db exist, and we can ignore the snapshot because of the ignore_snapshot_if_db_exists flag
} else {
open_or_create_database(opt, empty_db)?
}
} else if let Some(ref path) = opt.import_dump {
let src_path_exists = path.exists();
// the db is empty and the dump exists, import it
if empty_db && src_path_exists {
let (mut index_scheduler, mut auth_controller) =
open_or_create_database_unchecked(opt, OnFailure::RemoveDb)?;
match import_dump(&opt.db_path, path, &mut index_scheduler, &mut auth_controller) {
Ok(()) => (index_scheduler, auth_controller),
Err(e) => {
std::fs::remove_dir_all(&opt.db_path)?;
return Err(e);
}
}
// the db already exists and we should not ignore the dump option => throw an error
} else if !empty_db && !opt.ignore_dump_if_db_exists {
bail!(
"database already exists at {:?}, try to delete it or rename it",
opt.db_path.canonicalize().unwrap_or_else(|_| opt.db_path.to_owned())
)
// the dump doesn't exist and we can't ignore it => throw an error
} else if !src_path_exists && !opt.ignore_missing_dump {
bail!("dump doesn't exist at {:?}", path)
// the dump and the db exist and we can ignore the dump because of the ignore_dump_if_db_exists flag
// or, the dump is missing but we can ignore that because of the ignore_missing_dump flag
} else {
open_or_create_database(opt, empty_db)?
}
} else {
open_or_create_database(opt, empty_db)?
};
// We create a loop in a thread that registers snapshotCreation tasks
let index_scheduler = Arc::new(index_scheduler);
let auth_controller = Arc::new(auth_controller);
if let ScheduleSnapshot::Enabled(snapshot_delay) = opt.schedule_snapshot {
let snapshot_delay = Duration::from_secs(snapshot_delay);
let index_scheduler = index_scheduler.clone();
thread::Builder::new()
.name(String::from("register-snapshot-tasks"))
.spawn(move || loop {
thread::sleep(snapshot_delay);
if let Err(e) = index_scheduler.register(KindWithContent::SnapshotCreation) {
error!("Error while registering snapshot: {}", e);
}
})
.unwrap();
}
Ok((index_scheduler, auth_controller))
}
/// Try to start the IndexScheduler and AuthController without checking the VERSION file or anything.
fn open_or_create_database_unchecked(
opt: &Opt,
on_failure: OnFailure,
) -> anyhow::Result<(IndexScheduler, AuthController)> {
// we don't want to create anything in the data.ms yet, thus we
// wrap our two builders in a closure that'll be executed later.
let auth_controller = AuthController::new(&opt.db_path, &opt.master_key);
let instance_features = opt.to_instance_features();
let index_scheduler_builder = || -> anyhow::Result<_> {
Ok(IndexScheduler::new(IndexSchedulerOptions {
version_file_path: opt.db_path.join(VERSION_FILE_NAME),
auth_path: opt.db_path.join("auth"),
tasks_path: opt.db_path.join("tasks"),
update_file_path: opt.db_path.join("update_files"),
indexes_path: opt.db_path.join("indexes"),
snapshots_path: opt.snapshot_dir.clone(),
dumps_path: opt.dump_dir.clone(),
task_db_size: opt.max_task_db_size.get_bytes() as usize,
index_base_map_size: opt.max_index_size.get_bytes() as usize,
enable_mdb_writemap: opt.experimental_reduce_indexing_memory_usage,
indexer_config: (&opt.indexer_options).try_into()?,
autobatching_enabled: true,
max_number_of_tasks: 1_000_000,
index_growth_amount: byte_unit::Byte::from_str("10GiB").unwrap().get_bytes() as usize,
index_count: DEFAULT_INDEX_COUNT,
instance_features,
})?)
};
match (
index_scheduler_builder(),
auth_controller.map_err(anyhow::Error::from),
create_version_file(&opt.db_path).map_err(anyhow::Error::from),
) {
(Ok(i), Ok(a), Ok(())) => Ok((i, a)),
(Err(e), _, _) | (_, Err(e), _) | (_, _, Err(e)) => {
if matches!(on_failure, OnFailure::RemoveDb) {
std::fs::remove_dir_all(&opt.db_path)?;
}
Err(e)
}
}
}
/// Ensure you're in a valid state and open the IndexScheduler + AuthController for you.
fn open_or_create_database(
opt: &Opt,
empty_db: bool,
) -> anyhow::Result<(IndexScheduler, AuthController)> {
if !empty_db {
check_version_file(&opt.db_path)?;
}
open_or_create_database_unchecked(opt, OnFailure::KeepDb)
}
fn import_dump(
db_path: &Path,
dump_path: &Path,
index_scheduler: &mut IndexScheduler,
auth: &mut AuthController,
) -> Result<(), anyhow::Error> {
let reader = File::open(dump_path)?;
let mut dump_reader = dump::DumpReader::open(reader)?;
if let Some(date) = dump_reader.date() {
log::info!(
"Importing a dump of meilisearch `{:?}` from the {}",
dump_reader.version(), // TODO: get the meilisearch version instead of the dump version
date
);
} else {
log::info!(
"Importing a dump of meilisearch `{:?}`",
dump_reader.version(), // TODO: get the meilisearch version instead of the dump version
);
}
let instance_uid = dump_reader.instance_uid()?;
// 1. Import the instance-uid.
if let Some(ref instance_uid) = instance_uid {
// we don't want to panic if there is an error with the instance-uid.
let _ = std::fs::write(db_path.join("instance-uid"), instance_uid.to_string().as_bytes());
};
// 2. Import the `Key`s.
let mut keys = Vec::new();
auth.raw_delete_all_keys()?;
for key in dump_reader.keys()? {
let key = key?;
auth.raw_insert_key(key.clone())?;
keys.push(key);
}
// 3. Import the runtime features.
let features = dump_reader.features()?.unwrap_or_default();
index_scheduler.put_runtime_features(features)?;
let indexer_config = index_scheduler.indexer_config();
// /!\ The tasks must be imported AFTER importing the indexes or else the scheduler might
// try to process tasks while we're trying to import the indexes.
// 4. Import the indexes.
for index_reader in dump_reader.indexes()? {
let mut index_reader = index_reader?;
let metadata = index_reader.metadata();
log::info!("Importing index `{}`.", metadata.uid);
let date = Some((metadata.created_at, metadata.updated_at));
let index = index_scheduler.create_raw_index(&metadata.uid, date)?;
let mut wtxn = index.write_txn()?;
let mut builder = milli::update::Settings::new(&mut wtxn, &index, indexer_config);
// 4.1 Import the primary key if there is one.
if let Some(ref primary_key) = metadata.primary_key {
builder.set_primary_key(primary_key.to_string());
}
// 4.2 Import the settings.
log::info!("Importing the settings.");
let settings = index_reader.settings()?;
apply_settings_to_builder(&settings, &mut builder);
builder.execute(|indexing_step| log::debug!("update: {:?}", indexing_step), || false)?;
// 4.3 Import the documents.
// 4.3.1 We need to recreate the grenad+obkv format accepted by the index.
log::info!("Importing the documents.");
let file = tempfile::tempfile()?;
let mut builder = DocumentsBatchBuilder::new(BufWriter::new(file));
for document in index_reader.documents()? {
builder.append_json_object(&document?)?;
}
// This flush the content of the batch builder.
let file = builder.into_inner()?.into_inner()?;
// 4.3.2 We feed it to the milli index.
let reader = BufReader::new(file);
let reader = DocumentsBatchReader::from_reader(reader)?;
let builder = milli::update::IndexDocuments::new(
&mut wtxn,
&index,
indexer_config,
IndexDocumentsConfig {
update_method: IndexDocumentsMethod::ReplaceDocuments,
..Default::default()
},
|indexing_step| log::debug!("update: {:?}", indexing_step),
|| false,
)?;
let (builder, user_result) = builder.add_documents(reader)?;
log::info!("{} documents found.", user_result?);
builder.execute()?;
wtxn.commit()?;
log::info!("All documents successfully imported.");
}
let mut index_scheduler_dump = index_scheduler.register_dumped_task()?;
// 5. Import the tasks.
for ret in dump_reader.tasks()? {
let (task, file) = ret?;
index_scheduler_dump.register_dumped_task(task, file)?;
}
Ok(index_scheduler_dump.finish()?)
}
pub fn configure_data(
config: &mut web::ServiceConfig,
index_scheduler: Data<IndexScheduler>,
auth: Data<AuthController>,
opt: &Opt,
analytics: Arc<dyn Analytics>,
) {
let http_payload_size_limit = opt.http_payload_size_limit.get_bytes() as usize;
config
.app_data(index_scheduler)
.app_data(auth)
.app_data(web::Data::from(analytics))
.app_data(
web::JsonConfig::default()
.content_type(|mime| mime == mime::APPLICATION_JSON)
.error_handler(|err, req: &HttpRequest| match err {
JsonPayloadError::ContentType => match req.headers().get(CONTENT_TYPE) {
Some(content_type) => MeilisearchHttpError::InvalidContentType(
content_type.to_str().unwrap_or("unknown").to_string(),
vec![mime::APPLICATION_JSON.to_string()],
)
.into(),
None => MeilisearchHttpError::MissingContentType(vec![
mime::APPLICATION_JSON.to_string(),
])
.into(),
},
err => PayloadError::from(err).into(),
}),
)
.app_data(PayloadConfig::new(http_payload_size_limit))
.app_data(
web::QueryConfig::default().error_handler(|err, _req| PayloadError::from(err).into()),
);
}
#[cfg(feature = "mini-dashboard")]
pub fn dashboard(config: &mut web::ServiceConfig, enable_frontend: bool) {
use actix_web::HttpResponse;
use static_files::Resource;
mod generated {
include!(concat!(env!("OUT_DIR"), "/generated.rs"));
}
if enable_frontend {
let generated = generated::generate();
// Generate routes for mini-dashboard assets
for (path, resource) in generated.into_iter() {
let Resource { mime_type, data, .. } = resource;
// Redirect index.html to /
if path == "index.html" {
config.service(web::resource("/").route(web::get().to(move || async move {
HttpResponse::Ok().content_type(mime_type).body(data)
})));
} else {
config.service(web::resource(path).route(web::get().to(move || async move {
HttpResponse::Ok().content_type(mime_type).body(data)
})));
}
}
} else {
config.service(web::resource("/").route(web::get().to(routes::running)));
}
}
#[cfg(not(feature = "mini-dashboard"))]
pub fn dashboard(config: &mut web::ServiceConfig, _enable_frontend: bool) {
config.service(web::resource("/").route(web::get().to(routes::running)));
}
/// Parses the output of
/// [`VERGEN_GIT_SEMVER_LIGHTWEIGHT`](https://docs.rs/vergen/latest/vergen/struct.Git.html#instructions)
/// as a prototype name.
///
/// Returns `Some(prototype_name)` if the following conditions are met on this value:
///
/// 1. starts with `prototype-`,
/// 2. ends with `-<some_number>`,
/// 3. does not end with `<some_number>-<some_number>`.
///
/// Otherwise, returns `None`.
pub fn prototype_name() -> Option<&'static str> {
let prototype: &'static str = option_env!("VERGEN_GIT_SEMVER_LIGHTWEIGHT")?;
if !prototype.starts_with("prototype-") {
return None;
}
let mut rsplit_prototype = prototype.rsplit('-');
// last component MUST be a number
rsplit_prototype.next()?.parse::<u64>().ok()?;
// before than last component SHALL NOT be a number
rsplit_prototype.next()?.parse::<u64>().err()?;
Some(prototype)
}