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Use http/2 and keepalives #1378

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Use http/2 and keepalives #1378

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b50c614
use rustls feature in addition, 5min keepalive, connection pool 20
technillogue Jul 29, 2023
dfa8491
make connection pool size configurable and add throughput logging
technillogue Jul 29, 2023
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106 changes: 106 additions & 0 deletions Cargo.lock
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2 changes: 1 addition & 1 deletion storage/Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,7 @@ leaky-bucket = { version = "0.12.1", optional = true }
libc = "0.2"
log = "0.4.8"
nix = "0.24"
reqwest = { version = "0.11.14", features = ["blocking", "json"], optional = true }
reqwest = { version = "0.11.14", features = ["blocking", "json", "rustls", "rustls-tls"], optional = true }
serde = { version = "1.0.110", features = ["serde_derive", "rc"] }
serde_json = "1.0.53"
sha1 = { version = "0.10.5", optional = true }
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12 changes: 10 additions & 2 deletions storage/src/backend/connection.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,7 @@ use std::str::FromStr;
use std::sync::atomic::{AtomicBool, AtomicI16, AtomicU8, Ordering};
use std::sync::Arc;
use std::time::{Duration, Instant, SystemTime, UNIX_EPOCH};
use std::{fmt, thread};
use std::{env, fmt, thread};

use log::{max_level, Level};

Expand Down Expand Up @@ -607,11 +607,19 @@ impl Connection {
} else {
None
};
// get pool size from envvar
let pool_max_idle_per_host = match env::var("REGISTRY_CLIENT_POOL_MAX_IDLE_PER_HOST") {
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Do these idle connections take pressure on the registry server? Especially when the container is started and prefetch work is done. Maybe we can make the value as the one option of ConnectionConfig.

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I don't think it would make a significant impact for reasonable values. Most servers should close idle connections if it becomes a problem.

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How about making the value as the one option of ConnectionConfig?

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It's better to fetch REGISTRY_CLIENT_POOL_MAX_IDLE_PER_HOST from configuration.

Ok(val) => val.parse::<usize>().unwrap_or(20),
Err(_) => 20,
};

let mut cb = Client::builder()
.timeout(timeout)
.connect_timeout(connect_timeout)
.redirect(Policy::none());
.redirect(Policy::none())
.use_rustls_tls()
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why use_rustls_tls() here? It introduces heavy dependencies.

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How about using native-tls instead? We already have vendored openssl-sys crate.

openssl = { version = "0.10.55", features = ["vendored"] }

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it's required for http/2, as far as I know native-tls does not provide for the ALPN required for http/2

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would this be acceptable?

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It should be acceptable I think.

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Should I make any other changes to this then?

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How about making the env REGISTRY_CLIENT_POOL_MAX_IDLE_PER_HOST value as the one option of ConnectionConfig?

.tcp_keepalive(Some(Duration::from_secs(5 * 60)))
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Should be configurable.

.pool_max_idle_per_host(pool_max_idle_per_host);

if config.skip_verify {
cb = cb.danger_accept_invalid_certs(true);
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15 changes: 11 additions & 4 deletions storage/src/cache/mod.rs
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Expand Up @@ -270,13 +270,17 @@ pub trait BlobCache: Send + Sync {
)));
}
let duration = Instant::now().duration_since(start).as_millis();
let duration_s = duration as f64 / 1000.0;
let throughput_mbps = blob_size as f64 / duration_s / 1_000_000.0;

debug!(
"read_chunks_from_backend: {} {} {} bytes at {}, duration {}ms",
"read_chunks_from_backend: {} {} {} bytes at {}, duration {}ms, throughput {:.4}Mbps",
std::thread::current().name().unwrap_or_default(),
if prefetch { "prefetch" } else { "fetch" },
blob_size,
blob_offset,
duration
duration,
throughput_mbps
);

let chunks = chunks.iter().map(|v| v.as_ref()).collect();
Expand Down Expand Up @@ -328,12 +332,15 @@ pub trait BlobCache: Send + Sync {
}

let duration = Instant::now().duration_since(start).as_millis();
let duration_s = duration as f64 / 1000.0;
let throughput_mbps = chunk.compressed_size() as f64 / duration_s / 1_000_000.0;
debug!(
"read_chunk_from_backend: {} {} bytes at {}, duration {}ms",
"read_chunk_from_backend: {} {} bytes at {}, duration {}ms, throughput {:.4}Mbps",
std::thread::current().name().unwrap_or_default(),
chunk.compressed_size(),
chunk.compressed_offset(),
duration
duration,
throughput_mbps
);
self.validate_chunk_data(chunk, buffer, false)
.map_err(|e| {
Expand Down