0046a02a4a
* dont migrate on start. just connect * it compiles * that log is loud * get transaction from a local clone * import the trait * put the test app into a thread instead of tokio::spawn * fix one test * try db before rpcs * db connection is too slow. need to wait for it * do db setup once while spawning
124 lines
4.0 KiB
Rust
124 lines
4.0 KiB
Rust
use anyhow::Context;
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use derive_more::From;
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use migration::sea_orm::{self, ConnectionTrait, Database};
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use migration::sea_query::table::ColumnDef;
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use migration::{Alias, DbErr, Migrator, MigratorTrait, Table};
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use std::time::Duration;
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use tokio::time::sleep;
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use tracing::{debug, info, warn};
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pub use migration::sea_orm::DatabaseConnection;
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/// Simple wrapper so that we can keep track of read only connections.
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/// WARNING! This does not actually block writing in the compiler!
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/// There will be runtime errors if this is used to write though.
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#[derive(Clone, From)]
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pub struct DatabaseReplica(DatabaseConnection);
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// TODO: this still doesn't work like i want. I want to be able to do `query.one(&DatabaseReplicate).await?`
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impl AsRef<DatabaseConnection> for DatabaseReplica {
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fn as_ref(&self) -> &DatabaseConnection {
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&self.0
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}
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}
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pub async fn connect_db(
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db_url: String,
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min_connections: u32,
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max_connections: u32,
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) -> Result<DatabaseConnection, DbErr> {
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// TODO: scrub credentials and then include the db_url in logs
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info!("Connecting to db");
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let mut db_opt = sea_orm::ConnectOptions::new(db_url);
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// TODO: load all these options from the config file. i think docker mysql default max is 100
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// Amazon RDS Proxy default idle timeout is 1800 seconds
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db_opt
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.acquire_timeout(Duration::from_secs(3))
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.connect_timeout(Duration::from_secs(3))
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.idle_timeout(Duration::from_secs(1795))
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.max_connections(max_connections)
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.max_lifetime(Duration::from_secs(60))
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.min_connections(min_connections)
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.sqlx_logging(true)
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.sqlx_logging_level(tracing::log::LevelFilter::Trace);
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Database::connect(db_opt).await
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}
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pub async fn drop_migration_lock(db_conn: &DatabaseConnection) -> anyhow::Result<()> {
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let db_backend = db_conn.get_database_backend();
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let drop_lock_statment = db_backend.build(Table::drop().table(Alias::new("migration_lock")));
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db_conn
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.execute(drop_lock_statment)
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.await
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.context("dropping lock")?;
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debug!("migration lock unlocked");
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Ok(())
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}
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/// Be super careful with override_existing_lock! It is very important that only one process is running the migrations at a time!
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pub async fn migrate_db(
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db_conn: &DatabaseConnection,
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override_existing_lock: bool,
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) -> anyhow::Result<()> {
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let db_backend = db_conn.get_database_backend();
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// TODO: put the timestamp and hostname into this as columns?
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let create_lock_statment = db_backend.build(
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Table::create()
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.table(Alias::new("migration_lock"))
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.col(ColumnDef::new(Alias::new("locked")).boolean().default(true)),
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);
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if Migrator::get_pending_migrations(db_conn).await?.is_empty() {
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info!("no migrations to apply");
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return Ok(());
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}
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info!("checking migration lock...");
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// there are migrations to apply
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// acquire a lock
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if db_conn.execute(create_lock_statment).await.is_err() {
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if override_existing_lock {
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warn!("OVERRIDING EXISTING LOCK in 10 seconds! ctrl+c now if other migrations are actually running!");
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sleep(Duration::from_secs(10)).await
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} else {
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return Err(anyhow::anyhow!("Unable to acquire lock. if you are positive no migration is running, run \"web3_proxy_cli drop_migration_lock\""));
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}
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}
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info!("migrating...");
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let migration_result = Migrator::up(db_conn, None).await;
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// drop the distributed lock
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drop_migration_lock(db_conn).await?;
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// return if migrations erred
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migration_result.map_err(Into::into)
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}
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/// Connect to the database and run migrations
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pub async fn get_migrated_db(
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db_url: String,
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min_connections: u32,
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max_connections: u32,
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) -> anyhow::Result<DatabaseConnection> {
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// TODO: this seems to fail silently
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let db_conn = connect_db(db_url, min_connections, max_connections)
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.await
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.context("getting db")?;
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migrate_db(&db_conn, false).await.context("migrating db")?;
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Ok(db_conn)
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}
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