Display reqwest error source (#10004)

## Problem

Reqwest errors don't include details about the inner source error. This
means that we get opaque errors like:

```
receive body: error sending request for url (http://localhost:9898/v1/location_config)
```

Instead of the more helpful:

```
receive body: error sending request for url (http://localhost:9898/v1/location_config): operation timed out
```

Touches #9801.

## Summary of changes

Include the source error for `reqwest::Error` wherever it's displayed.

control_plane/src/safekeeper.rs

@@ -5,6 +5,7 @@
 //! ```text
 //!   .neon/safekeepers/<safekeeper id>
 //! ```
+use std::error::Error as _;
 use std::future::Future;
 use std::io::Write;
 use std::path::PathBuf;
@@ -26,7 +27,7 @@ use crate::{
 
 #[derive(Error, Debug)]
 pub enum SafekeeperHttpError {
-    #[error("Reqwest error: {0}")]
+    #[error("request error: {0}{}", .0.source().map(|e| format!(": {e}")).unwrap_or_default())]
     Transport(#[from] reqwest::Error),
 
     #[error("Error: {0}")]

pageserver/client/src/mgmt_api.rs

@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use std::{collections::HashMap, error::Error as _};
 
 use bytes::Bytes;
 use detach_ancestor::AncestorDetached;
@@ -25,10 +25,10 @@ pub struct Client {
 
 #[derive(thiserror::Error, Debug)]
 pub enum Error {
-    #[error("send request: {0}")]
+    #[error("send request: {0}{}", .0.source().map(|e| format!(": {e}")).unwrap_or_default())]
     SendRequest(reqwest::Error),
 
-    #[error("receive body: {0}")]
+    #[error("receive body: {0}{}", .0.source().map(|e| format!(": {e}")).unwrap_or_default())]
     ReceiveBody(reqwest::Error),
 
     #[error("receive error body: {0}")]

pageserver/src/consumption_metrics/upload.rs

@@ -1,3 +1,4 @@
+use std::error::Error as _;
 use std::time::SystemTime;
 
 use chrono::{DateTime, Utc};
@@ -350,7 +351,11 @@ impl std::fmt::Display for UploadError {
 
         match self {
             Rejected(code) => write!(f, "server rejected the metrics with {code}"),
-            Reqwest(e) => write!(f, "request failed: {e}"),
+            Reqwest(e) => write!(
+                f,
+                "request failed: {e}{}",
+                e.source().map(|e| format!(": {e}")).unwrap_or_default()
+            ),
             Cancelled => write!(f, "cancelled"),
         }
     }

safekeeper/src/http/client.rs

@@ -8,6 +8,7 @@
 //! etc.
 
 use reqwest::{IntoUrl, Method, StatusCode};
+use std::error::Error as _;
 use utils::{
     http::error::HttpErrorBody,
     id::{NodeId, TenantId, TimelineId},
@@ -26,7 +27,7 @@ pub struct Client {
 #[derive(thiserror::Error, Debug)]
 pub enum Error {
     /// Failed to receive body (reqwest error).
-    #[error("receive body: {0}")]
+    #[error("receive body: {0}{}", .0.source().map(|e| format!(": {e}")).unwrap_or_default())]
     ReceiveBody(reqwest::Error),
 
     /// Status is not ok, but failed to parse body as `HttpErrorBody`.

storage_controller/src/compute_hook.rs

@@ -1,3 +1,4 @@
+use std::error::Error as _;
 use std::sync::Arc;
 use std::{collections::HashMap, time::Duration};
 
@@ -172,7 +173,7 @@ struct ComputeHookNotifyRequest {
 #[derive(thiserror::Error, Debug)]
 pub(crate) enum NotifyError {
     // Request was not send successfully, e.g. transport error
-    #[error("Sending request: {0}")]
+    #[error("Sending request: {0}{}", .0.source().map(|e| format!(": {e}")).unwrap_or_default())]
     Request(#[from] reqwest::Error),
     // Request could not be serviced right now due to ongoing Operation in control plane, but should be possible soon.
     #[error("Control plane tenant busy")]

storage_controller/src/peer_client.rs

@@ -1,7 +1,9 @@
 use crate::tenant_shard::ObservedState;
 use pageserver_api::shard::TenantShardId;
 use serde::{Deserialize, Serialize};
-use std::{collections::HashMap, time::Duration};
+use std::collections::HashMap;
+use std::error::Error as _;
+use std::time::Duration;
 use tokio_util::sync::CancellationToken;
 
 use hyper::Uri;
@@ -17,11 +19,14 @@ pub(crate) struct PeerClient {
 
 #[derive(thiserror::Error, Debug)]
 pub(crate) enum StorageControllerPeerError {
-    #[error("failed to deserialize error response with status code {0} at {1}: {2}")]
+    #[error(
+        "failed to deserialize error response with status code {0} at {1}: {2}{}",
+        .2.source().map(|e| format!(": {e}")).unwrap_or_default()
+    )]
     DeserializationError(StatusCode, Url, reqwest::Error),
     #[error("storage controller peer API error ({0}): {1}")]
     ApiError(StatusCode, String),
-    #[error("failed to send HTTP request: {0}")]
+    #[error("failed to send HTTP request: {0}{}", .0.source().map(|e| format!(": {e}")).unwrap_or_default())]
     SendError(reqwest::Error),
     #[error("Cancelled")]
     Cancelled,

storage_scrubber/src/cloud_admin_api.rs

@@ -1,3 +1,5 @@
+use std::error::Error as _;
+
 use chrono::{DateTime, Utc};
 use futures::Future;
 use hex::FromHex;
@@ -30,14 +32,18 @@ impl std::fmt::Display for Error {
         match &self.kind {
             ErrorKind::RequestSend(e) => write!(
                 f,
-                "Failed to send a request. Context: {}, error: {}",
-                self.context, e
+                "Failed to send a request. Context: {}, error: {}{}",
+                self.context,
+                e,
+                e.source().map(|e| format!(": {e}")).unwrap_or_default()
             ),
             ErrorKind::BodyRead(e) => {
                 write!(
                     f,
-                    "Failed to read a request body. Context: {}, error: {}",
-                    self.context, e
+                    "Failed to read a request body. Context: {}, error: {}{}",
+                    self.context,
+                    e,
+                    e.source().map(|e| format!(": {e}")).unwrap_or_default()
                 )
             }
             ErrorKind::ResponseStatus(status) => {