c4b3765574
Currently, the proxy uses a variety of types to represent the logical destination of a request. Outbound destinations use a `NameAddr` type which may be either a `DnsNameAndPort` or a `SocketAddr`. Other parts of the code used a `HostAndPort` enum that always contained a port and also contained a `Host` which could either be a `dns::Name` or a `IpAddr`. Furthermore, we coerce these types into a `http::uri::Authority` in many cases. All of these types represent the same thing; and it's not clear when/why it's appropriate to use a given variant. In order to simplify the situtation, a new `addr` module has been introduced with `Addr` and `NameAddr` types. A `Addr` may contain either a `NameAddr` or a `SocketAddr`. The `Host` value has been removed from the `Settings::Http1` type, replaced by a boolean, as it's redundant information stored elsewhere in the route key. There is one small change in behavior: The `authority` metrics label is now omitted only for requests that include an `:authority` or `Host` with a _name_ (i.e. and not an IP address). |
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| CONTRIBUTING.md | ||
| Cargo.lock | ||
| Cargo.toml | ||
| DCO | ||
| Dockerfile | ||
| GOVERNANCE.md | ||
| LICENSE | ||
| MAINTAINERS.md | ||
| Makefile | ||
| README.md | ||
README.md
This repo contains the transparent proxy component of Linkerd2. While the Linkerd2 proxy is heavily influenced by the Linkerd 1.X proxy, it comprises an entirely new codebase implemented in the Rust programming language.
This proxy's features include:
- Transparent, zero-config proxying for HTTP, HTTP/2, and arbitrary TCP protocols.
- Automatic Prometheus metrics export for HTTP and TCP traffic;
- Transparent, zero-config WebSocket proxying;
- Automatic, latency-aware, layer-7 load balancing;
- Automatic layer-4 load balancing for non-HTTP traffic;
- Automatic TLS (experimental);
- An on-demand diagnostic
tapAPI.
This proxy is primarily intended to run on Linux in containerized environments like Kubernetes, though it may also work on other Unix-like systems (like macOS).
The proxy supports service discovery via DNS and the linkerd2
Destination gRPC API.
The Linkerd project is hosted by the Cloud Native Computing Foundation (CNCF).
Building the project
A Makefile is provided to automate most build tasks. It provides the
following targets:
make build-- Compiles the proxy on your local system usingcargomake test-- Runs unit and integration tests on your local system usingcargomake test-flakey-- Runs all tests, including those that may fail spuriouslymake package-- Builds a tarball attarget/release/linkerd2-proxy-${PACKAGE_VERSION}.tar.gz. IfPACKAGE_VERSIONis not set in the environment, the local git SHA is used.make docker-- Builds a Docker container image that can be used for testing. If theDOCKER_TAGenvironment variable is set, the image is given this name. Otherwise, the image is not named.
Cargo
Usually, Cargo, Rust's package manager, is used to build and test this project. If you don't have Cargo installed, we suggest getting it via https://rustup.rs/.
Artifacts
Each version of the master branch is published to
build.l5d.io/linkerd2-proxy/linkerd2-proxy-$PACKAGE_VERSION.tar.gz. The most recent
version (and the package's SHA256 sum) can be discovered via:
:; curl https://build.l5d.io/linkerd2-proxy/latest.txt
The SHA256 sum of each package version is found at:
:; curl https://build.l5d.io/linkerd2-proxy/linkerd2-proxy-$PACKAGE_VERSION.txt
Code of conduct
This project is for everyone. We ask that our users and contributors take a few minutes to review our code of conduct.
License
linkerd2-proxy is copyright 2018 the linkerd2-proxy authors. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License"); you may not use these files except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.