We've started instrumenting the entire stack. In this release, we're adding metrics for:
* the swarm: tracking incoming and outgoing connections, transports, security protocols and stream multiplexers in sue: (https://github.com/libp2p/go-libp2p/blob/master/p2p/net/swarm/grafana-dashboards/swarm.json)
@ -33,11 +32,11 @@ We've started instrumenting the entire stack. In this release, we're adding metr
Our metrics effort is still ongoing, see https://github.com/libp2p/go-libp2p/issues/1356 for progress. We'll add metrics and dashboards for more libp2p components in a future release.
### Switching to Google's official Protobuf compiler
### Switching to Google's official Protobuf compiler<!-- omit in toc -->
So far, we were using GoGo Protobuf to compile our Protobuf definitions to Go code. However, this library was deprecated in October last year: https://twitter.com/awalterschulze/status/1584553056100057088. We [benchmarked](https://github.com/libp2p/go-libp2p/issues/1976#issuecomment-1371527732) serialization and deserialization, and found that it's (only) 20% slower than GoGo. Since the vast majority of go-libp2p's CPU time is spent in code paths other than Protobuf handling, switching to the official compiler seemed like a worthwhile tradeoff.
### Removal of OpenSSL
### Removal of OpenSSL<!-- omit in toc -->
Before this release, go-libp2p had an option to use OpenSSL bindings for certain cryptographic primitives, mostly to speed up the generation of signatures and their verification. When building go-libp2p using `go build`, we'd use the standard library crypto packages. OpenSSL was only used when passing in a build tag: `go build -tags openssl`.
Maintaining our own fork of the long unmaintained [go-openssl package](https://github.com/libp2p/go-openssl) has proven to place a larger than expected maintenance burden on the libp2p stewards, and when we recently discovered a range of new bugs ([this](https://github.com/libp2p/go-openssl/issues/38) and [this](https://github.com/libp2p/go-libp2p/issues/1892) and [this](https://github.com/libp2p/go-libp2p/issues/1951)), we decided to re-evaluate if this code path is really worth it. The results surprised us, it turns out that:
@ -49,7 +48,7 @@ Now the good news is, that if your node is not using an RSA key, it will never c
We therefore concluded that it's safe to drop this code path altogether, and thereby reduce our maintenance burden.
### New Resource Manager types
### New Resource Manager types<!-- omit in toc -->
* Introduces a new type `LimitVal` which can explicitly specify "use default", "unlimited", "block all", as well as any positive number. The zero value of `LimitVal` (the value when you create the object in Go) is "Use default".
* The JSON marshalling of this is straightforward.
@ -61,11 +60,11 @@ In general, you can go from a resource config with defaults to a concrete one wi
If you're using the defaults for the resource manager, there should be no changes needed.
### Other Breaking Changes
### Other Breaking Changes<!-- omit in toc -->
We've cleaned up our API to consistently use `protocol.ID` for libp2p and application protocols. Specifically, this means that the peer store now uses `protocol.ID`s, and the host's `SetStreamHandler` as well.
## What's Changed
## What's Changed<!-- omit in toc -->
* chore: use generic LRU cache by @muXxer in https://github.com/libp2p/go-libp2p/pull/1980
* core/crypto: drop all OpenSSL code paths by @marten-seemann in https://github.com/libp2p/go-libp2p/pull/1953
* add WebTransport to the list of default transports by @marten-seemann in https://github.com/libp2p/go-libp2p/pull/1915
@ -117,7 +116,7 @@ We've cleaned up our API to consistently use `protocol.ID` for libp2p and applic
* identify: add some basic metrics by @marten-seemann in https://github.com/libp2p/go-libp2p/pull/2069
* chore: Release v0.25.0 by @MarcoPolo in https://github.com/libp2p/go-libp2p/pull/2077
## New Contributors
## New Contributors<!-- omit in toc -->
* @muXxer made their first contribution in https://github.com/libp2p/go-libp2p/pull/1980
* @ajnavarro made their first contribution in https://github.com/libp2p/go-libp2p/pull/1998
* @sukunrt made their first contribution in https://github.com/libp2p/go-libp2p/pull/2007
Prithvi Shahi
2 years ago
GitHub