Remove unnecessary dependencies to synchronous 'postgres' crate (#10938)

The synchronous 'postgres' crate is just a wrapper around the async
'tokio_postgres' crate. Some places were unnecessarily using the
re-exported NoTls and Error from the synchronous 'postgres' crate, even
though they were otherwise using the 'tokio_postgres' crate. Tidy up by
using the tokio_postgres types directly.

Cargo.lock

@@ -4172,7 +4172,6 @@ dependencies = [
  "pageserver_client",
  "pageserver_compaction",
  "pin-project-lite",
- "postgres",
  "postgres-protocol",
  "postgres-types",
  "postgres_backend",
@@ -4259,7 +4258,6 @@ dependencies = [
  "futures",
  "http-utils",
  "pageserver_api",
- "postgres",
  "reqwest",
  "serde",
  "thiserror 1.0.69",
@@ -4674,7 +4672,6 @@ dependencies = [
  "anyhow",
  "itertools 0.10.5",
  "once_cell",
- "postgres",
  "tokio-postgres",
  "url",
 ]
@@ -5816,7 +5813,6 @@ dependencies = [
  "once_cell",
  "pageserver_api",
  "parking_lot 0.12.1",
- "postgres",
  "postgres-protocol",
  "postgres_backend",
  "postgres_ffi",

libs/postgres_connection/Cargo.toml

@@ -7,7 +7,6 @@ license.workspace = true
 [dependencies]
 anyhow.workspace = true
 itertools.workspace = true
-postgres.workspace = true
 tokio-postgres.workspace = true
 url.workspace = true
 

libs/postgres_connection/src/lib.rs

@@ -171,10 +171,10 @@ impl PgConnectionConfig {
             tokio_postgres::Client,
             tokio_postgres::Connection<tokio_postgres::Socket, tokio_postgres::tls::NoTlsStream>,
         ),
-        postgres::Error,
+        tokio_postgres::Error,
     > {
         self.to_tokio_postgres_config()
-            .connect(postgres::NoTls)
+            .connect(tokio_postgres::NoTls)
             .await
     }
 }

pageserver/Cargo.toml

@@ -40,7 +40,6 @@ num_cpus.workspace = true
 num-traits.workspace = true
 once_cell.workspace = true
 pin-project-lite.workspace = true
-postgres.workspace = true
 postgres_backend.workspace = true
 postgres-protocol.workspace = true
 postgres-types.workspace = true

pageserver/client/Cargo.toml

@@ -21,5 +21,4 @@ tokio.workspace = true
 futures.workspace = true
 tokio-util.workspace = true
 anyhow.workspace = true
-postgres.workspace = true
 bytes.workspace = true

pageserver/client/src/page_service.rs

@@ -34,7 +34,8 @@ pub struct BasebackupRequest {
 
 impl Client {
     pub async fn new(connstring: String) -> anyhow::Result<Self> {
-        let (client, connection) = tokio_postgres::connect(&connstring, postgres::NoTls).await?;
+        let (client, connection) =
+            tokio_postgres::connect(&connstring, tokio_postgres::NoTls).await?;
 
         let conn_task_cancel = CancellationToken::new();
         let conn_task = tokio::spawn({

pageserver/src/tenant/timeline/walreceiver/walreceiver_connection.rs

@@ -13,12 +13,12 @@ use bytes::BytesMut;
 use chrono::{NaiveDateTime, Utc};
 use fail::fail_point;
 use futures::StreamExt;
-use postgres::{error::SqlState, SimpleQueryMessage, SimpleQueryRow};
 use postgres_ffi::WAL_SEGMENT_SIZE;
 use postgres_ffi::{v14::xlog_utils::normalize_lsn, waldecoder::WalDecodeError};
 use postgres_protocol::message::backend::ReplicationMessage;
 use postgres_types::PgLsn;
 use tokio::{select, sync::watch, time};
+use tokio_postgres::{error::SqlState, SimpleQueryMessage, SimpleQueryRow};
 use tokio_postgres::{replication::ReplicationStream, Client};
 use tokio_util::sync::CancellationToken;
 use tracing::{debug, error, info, trace, warn, Instrument};
@@ -64,7 +64,7 @@ pub(super) struct WalConnectionStatus {
 
 pub(super) enum WalReceiverError {
     /// An error of a type that does not indicate an issue, e.g. a connection closing
-    ExpectedSafekeeperError(postgres::Error),
+    ExpectedSafekeeperError(tokio_postgres::Error),
     /// An "error" message that carries a SUCCESSFUL_COMPLETION status code.  Carries
     /// the message part of the original postgres error
     SuccessfulCompletion(String),
@@ -143,7 +143,7 @@ pub(super) async fn handle_walreceiver_connection(
         let mut config = wal_source_connconf.to_tokio_postgres_config();
         config.application_name(format!("pageserver-{}", timeline.conf.id.0).as_str());
         config.replication_mode(tokio_postgres::config::ReplicationMode::Physical);
-        match time::timeout(connect_timeout, config.connect(postgres::NoTls)).await {
+        match time::timeout(connect_timeout, config.connect(tokio_postgres::NoTls)).await {
             Ok(client_and_conn) => client_and_conn?,
             Err(_elapsed) => {
                 // Timing out to connect to a safekeeper node could happen long time, due to

safekeeper/Cargo.toml

@@ -31,7 +31,6 @@ futures.workspace = true
 once_cell.workspace = true
 parking_lot.workspace = true
 pageserver_api.workspace = true
-postgres.workspace = true
 postgres-protocol.workspace = true
 pprof.workspace = true
 rand.workspace = true

safekeeper/src/recovery.rs

@@ -343,8 +343,11 @@ async fn recovery_stream(
     cfg.replication_mode(tokio_postgres::config::ReplicationMode::Physical);
 
     let connect_timeout = Duration::from_millis(10000);
-    let (client, connection) = match time::timeout(connect_timeout, cfg.connect(postgres::NoTls))
-        .await
+    let (client, connection) = match time::timeout(
+        connect_timeout,
+        cfg.connect(tokio_postgres::NoTls),
+    )
+    .await
     {
         Ok(client_and_conn) => client_and_conn?,
         Err(_elapsed) => {