From 7b0fccc3d1746cecde2d4a1820622b596f6ef03a Mon Sep 17 00:00:00 2001 From: Arne Bahlo Date: Thu, 25 Aug 2022 16:27:57 +0200 Subject: [PATCH] Initial commit --- .github/workflows/ci.yaml | 88 ++ .gitignore | 3 + Cargo.toml | 37 + LICENSE-APACHE | 201 +++++ LICENSE-MIT | 21 + README.md | 94 ++ examples/Cargo.lock | 1630 +++++++++++++++++++++++++++++++++++ examples/Cargo.toml | 3 + examples/fmt/Cargo.toml | 11 + examples/fmt/src/main.rs | 22 + examples/simple/Cargo.toml | 12 + examples/simple/src/main.rs | 13 + rust-toolchain | 1 + src/builder.rs | 136 +++ src/error.rs | 22 + src/lib.rs | 82 ++ 16 files changed, 2376 insertions(+) create mode 100644 .github/workflows/ci.yaml create mode 100644 .gitignore create mode 100644 Cargo.toml create mode 100644 LICENSE-APACHE create mode 100644 LICENSE-MIT create mode 100644 README.md create mode 100644 examples/Cargo.lock create mode 100644 examples/Cargo.toml create mode 100644 examples/fmt/Cargo.toml create mode 100644 examples/fmt/src/main.rs create mode 100644 examples/simple/Cargo.toml create mode 100644 examples/simple/src/main.rs create mode 100644 rust-toolchain create mode 100644 src/builder.rs create mode 100644 src/error.rs create mode 100644 src/lib.rs diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml new file mode 100644 index 0000000..c92b579 --- /dev/null +++ b/.github/workflows/ci.yaml @@ -0,0 +1,88 @@ +name: CI + +on: + pull_request: + branches: + - main + push: + branches: + - main + tags: + - "v*" + +jobs: + rust_fmt_check: + name: Rustfmt check + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v3 + - uses: actions/cache@v3 + with: + path: | + ~/.cargo/registry + ~/.cargo/git + target + key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }} + - name: Install rust + uses: actions-rs/toolchain@v1 + with: + components: rustfmt + - name: Run cargo fmt + uses: actions-rs/cargo@v1 + with: + command: fmt + args: -- --check + clippy_check: + name: Clippy check + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v3 + - uses: actions/cache@v3 + with: + path: | + ~/.cargo/registry + ~/.cargo/git + target + key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }} + - name: Install clippy + run: rustup component add clippy + - name: Run clippy check + uses: actions-rs/clippy-check@v1 + with: + token: ${{ secrets.GITHUB_TOKEN }} + test: + name: Run tests + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v3 + - uses: actions/cache@v3 + with: + path: | + ~/.cargo/registry + ~/.cargo/git + target + key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }} + - name: Install rust + uses: actions-rs/toolchain@v1 + - name: Run cargo test + uses: actions-rs/cargo@v1 + env: + AXIOM_TOKEN: xaat-123456789 + with: + command: test + publish_on_crates_io: + name: Publish on crates.io + runs-on: ubuntu-latest + if: github.repository_owner == 'axiomhq' && startsWith(github.ref, 'refs/tags') + needs: + - rust_fmt_check + - clippy_check + - test + steps: + - uses: actions/checkout@v3 + - uses: actions-rs/toolchain@v1 + - uses: actions-rs/cargo@v1 + with: + command: publish + env: + CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }} \ No newline at end of file diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..636c580 --- /dev/null +++ b/.gitignore @@ -0,0 +1,3 @@ +/target +/Cargo.lock +/examples/target diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..b968c5e --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,37 @@ +[package] +name = "tracing-axiom" +version = "0.1.0" +authors = ["Arne Bahlo "] +edition = "2021" +rust-version = "1.60" +license = "MIT OR Apache-2.0" +description = "The tracing layer for shipping traces to Axiom" +homepage = "https://axiom.co" +repository = "https://github.com/axiomhq/tracing-axiom" +documentation = "https://docs.rs/tracing-axiom" +keywords = ["tracing", "axiom", "instrumentation"] +readme = "README.md" +include = ["src/**/*.rs", "README.md", "LICENSE-APACHE", "LICENSE-MIT"] +resolver = "2" + +[dependencies] +opentelemetry = { version = "0.17", features = ["rt-tokio"] } +opentelemetry-otlp = { version = "0.10", features = ["prost", "tokio", "http-proto"] } +opentelemetry-http = { version = "0.6", features = ["reqwest"] } +tracing-core = { version = "0.1", default-features = false, features = ["std"] } +tracing-opentelemetry = { version = "0.17", default-features = false } +tracing-subscriber = { version = "0.3", default-features = false, features = ["smallvec", "std"] } +reqwest = { version = "0.11", default-features = false } +thiserror = "1" +url = "2" +lazy_static = "1" + +[dev-dependencies] +tokio = "1" +tracing = "0.1" + +[features] +default = ["default-tls"] +default-tls = ["reqwest/default-tls"] +native-tls = ["reqwest/native-tls"] +rustls-tls = ["reqwest/rustls-tls"] \ No newline at end of file diff --git a/LICENSE-APACHE b/LICENSE-APACHE new file mode 100644 index 0000000..261eeb9 --- /dev/null +++ b/LICENSE-APACHE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. \ No newline at end of file diff --git a/README.md b/README.md new file mode 100644 index 0000000..84f2c5b --- /dev/null +++ b/README.md @@ -0,0 +1,94 @@ +# tracing-axiom + +[![CI](https://github.com/axiomhq/tracing-axiom/workflows/CI/badge.svg)](https://github.com/axiomhq/tracing-axiom/actions?query=workflow%3ACI) +[![crates.io](https://img.shields.io/crates/v/tracing-axiom.svg)](https://crates.io/crates/tracing-axiom) +[![docs.rs](https://docs.rs/tracing-axiom/badge.svg)](https://docs.rs/tracing-axiom/) +[![License](https://img.shields.io/crates/l/tracing-axiom)](LICENSE-APACHE) + +The tracing layer for shipping traces to Axiom. + +## Install + +Add the following to your `Cargo.toml`: + +```toml +[dependencies] +tracing-axiom = "0.1" +``` + +## Quickstart + +Expose an API token with ingest permission under `AXIOM_TOKEN` and initialize +and shut down the exporter like this: + +```rust +#[tokio::main] +async fn main() { + tracing_axiom::init(); // or try_init() to handle errors + say_hello(); + tracing_axiom::shutdown(); +} + +#[tracing::instrument] +pub fn say_hello() { + tracing::info!("Hello, world!"); +} +``` + +> **Note**: Due to a limitation of an underlying library, [events outside of a +> span are not recorded](https://docs.rs/tracing-opentelemetry/0.17.4/src/tracing_opentelemetry/layer.rs.html#807). + +## Kitchen Sink Full Configuration + +Here's a full configuration: + +```rust +use opentelemetry::sdk::trace; + +#[tokio::main] +async fn main() -> Result<(), Box> { + let trace_config = trace::Config::default() + .with_max_events_per_span(42); + + tracing_axiom::builder() + .with_token("xaat-123456789") + .with_url("https://my-axiom.example.org") + .with_service_name("my-service") + .with_trace_config(trace_config) + .try_init()?; + Ok(()) +} +``` + +If you want to use other layers next to Axiom in your tracing configuration, +check out the [fmt example](./examples/fmt). + +## Under The Hood + +This library uses [OpenTelemetry](https://opentelemetry.io) to send data to +Axiom. +You can set this up yourself if you want to, but make sure to use the OTLP +format with the http transport and set the endpoint to +`https://cloud.axiom.co/api/v1/traces`. +A good entrypoint is the +[`opentelemetry-otlp`](https://docs.rs/opentelemetry-otlp) crate. + +## Features + +The following are a list of +[Cargo features](https://doc.rust-lang.org/stable/cargo/reference/features.html#the-features-section) +that can be enabled or disabled: + +- **default-tls** _(enabled by default)_: Provides TLS support to connect + over HTTPS. +- **native-tls**: Enables TLS functionality provided by `native-tls`. +- **rustls-tls**: Enables TLS functionality provided by `rustls`. + +## License + +Licensed under either of + +- Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0) +- MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT) + +at your option. \ No newline at end of file diff --git a/examples/Cargo.lock b/examples/Cargo.lock new file mode 100644 index 0000000..279c8fd --- /dev/null +++ b/examples/Cargo.lock @@ -0,0 +1,1630 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +version = 3 + +[[package]] +name = "aho-corasick" +version = "0.7.18" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "1e37cfd5e7657ada45f742d6e99ca5788580b5c529dc78faf11ece6dc702656f" +dependencies = [ + "memchr", +] + +[[package]] +name = "ansi_term" +version = "0.12.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "d52a9bb7ec0cf484c551830a7ce27bd20d67eac647e1befb56b0be4ee39a55d2" +dependencies = [ + "winapi", 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--git a/examples/Cargo.toml b/examples/Cargo.toml new file mode 100644 index 0000000..5f00359 --- /dev/null +++ b/examples/Cargo.toml @@ -0,0 +1,3 @@ +[workspace] +members = ["*"] +exclude = ["target"] \ No newline at end of file diff --git a/examples/fmt/Cargo.toml b/examples/fmt/Cargo.toml new file mode 100644 index 0000000..f17cad4 --- /dev/null +++ b/examples/fmt/Cargo.toml @@ -0,0 +1,11 @@ +[package] +name = "fmt" +version = "0.1.0" +edition = "2021" + +[dependencies] +tokio = "1" +tracing = "0.1" +tracing-axiom = { path = "../../" } +tracing-subscriber = "0.3" + diff --git a/examples/fmt/src/main.rs b/examples/fmt/src/main.rs new file mode 100644 index 0000000..6e50dcf --- /dev/null +++ b/examples/fmt/src/main.rs @@ -0,0 +1,22 @@ +use tracing::{info, instrument}; +use tracing_subscriber::prelude::*; + +#[tokio::main] +async fn main() -> Result<(), Box> { + let axiom_layer = tracing_axiom::builder().with_service_name("fmt").layer()?; + let fmt_layer = tracing_subscriber::fmt::layer().pretty(); + tracing_subscriber::registry() + .with(fmt_layer) + .with(axiom_layer) + .try_init()?; + + say_hello(); + + tracing_axiom::shutdown(); + Ok(()) +} + +#[instrument] +fn say_hello() { + info!("hello world") +} diff --git a/examples/simple/Cargo.toml b/examples/simple/Cargo.toml new file mode 100644 index 0000000..5557ccf --- /dev/null +++ b/examples/simple/Cargo.toml @@ -0,0 +1,12 @@ +[package] +name = "simple" +version = "0.1.0" +edition = "2021" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] +tokio = "1" +tracing = "0.1" +tracing-axiom = { path = "../../" } + diff --git a/examples/simple/src/main.rs b/examples/simple/src/main.rs new file mode 100644 index 0000000..4468e91 --- /dev/null +++ b/examples/simple/src/main.rs @@ -0,0 +1,13 @@ +use tracing::{info, instrument}; + +#[tokio::main] +async fn main() { + tracing_axiom::init(); + say_hello(); + tracing_axiom::shutdown(); +} + +#[instrument] +fn say_hello() { + info!("hello world") +} diff --git a/rust-toolchain b/rust-toolchain new file mode 100644 index 0000000..870bbe4 --- /dev/null +++ b/rust-toolchain @@ -0,0 +1 @@ +stable \ No newline at end of file diff --git a/src/builder.rs b/src/builder.rs new file mode 100644 index 0000000..7aabf2b --- /dev/null +++ b/src/builder.rs @@ -0,0 +1,136 @@ +use opentelemetry::{ + sdk::{ + trace::{Config as TraceConfig, Tracer}, + Resource, + }, + KeyValue, +}; +use opentelemetry_otlp::WithExportConfig; +use std::{collections::HashMap, env, time::Duration}; +use tracing_core::Subscriber; +use tracing_opentelemetry::OpenTelemetryLayer; +use tracing_subscriber::{ + layer::SubscriberExt, registry::LookupSpan, util::SubscriberInitExt, Registry, +}; +use url::Url; + +use crate::{Error, CLOUD_URL}; + +/// Builder for creating a tracer, a layer or a subscriber that sends traces to +/// Axiom. +/// The token and the url are derived from the `AXIOM_TOKEN` and `AXIOM_URL` +/// environment variables. +#[derive(Debug, Default)] +pub struct Builder { + token: Option, + url: Option, + trace_config: Option, + service_name: Option, +} + +impl Builder { + /// Create a new Builder. + pub fn new() -> Self { + Self::default() + } + + /// Set the Axiom API token to use. + pub fn with_token(mut self, token: impl Into) -> Self { + self.token = Some(token.into()); + self + } + + /// Set the Axiom API URL to use. Defaults to Axiom Cloud. + pub fn with_url(mut self, url: impl Into) -> Self { + self.url = Some(url.into()); + self + } + + /// Set the trace config. + pub fn with_trace_config(mut self, trace_config: impl Into) -> Self { + self.trace_config = Some(trace_config.into()); + self + } + + /// Set the service name. It will be set as a resource attribute with the + /// name `service_name`. + pub fn with_service_name(mut self, service_name: impl Into) -> Self { + self.service_name = Some(service_name.into()); + self + } + + /// Initialize the global subscriber. This panics if the initialization was + /// unsuccessful, likely because a global subscriber was already installed or + /// `AXIOM_TOKEN` is not set or invalid. + pub fn init(self) { + self.try_init().unwrap() + } + + /// Initialize the global subscriber. This returns an error if the + /// initialization was unsuccessful, likely because a global subscriber was + /// already installed or `AXIOM_TOKEN` is not set or invalid. + pub fn try_init(self) -> Result<(), Error> { + Registry::default().with(self.layer()?).try_init()?; + Ok(()) + } + + /// Create a layer which sends traces to Axiom. + pub fn layer(self) -> Result, Error> + where + S: Subscriber + for<'span> LookupSpan<'span>, + { + let tracer = self.tracer()?; + let layer = tracing_opentelemetry::layer().with_tracer(tracer); + Ok(layer) + } + + /// Create a tracer which sends traces to Axiom. + pub fn tracer(self) -> Result { + let token = self + .token + .ok_or(Error::MissingToken) + .or_else(|_| env::var("AXIOM_TOKEN"))?; + if token.is_empty() { + return Err(Error::EmptyToken); + } else if !token.starts_with("xaat-") { + return Err(Error::InvalidToken); + } + + let url = self + .url + .or_else(|| env::var("AXIOM_URL").ok()) + .map(|url| Url::parse(&url).map_err(Error::InvalidUrl)) + .transpose()? + .unwrap_or_else(|| CLOUD_URL.clone()) + .join("/api/v1/traces")?; + + let mut headers = HashMap::with_capacity(2); + headers.insert("Authorization".to_string(), format!("Bearer {}", token)); + headers.insert( + "User-Agent".to_string(), + format!("tracing-axiom/{}", env!("CARGO_PKG_VERSION")), + ); + + let mut trace_config = self.trace_config.unwrap_or_default(); + if let Some(service_name) = self.service_name { + trace_config = trace_config.with_resource(Resource::new(vec![KeyValue::new( + "service.name", + service_name, // can we be smarter about this? + )])); + } + + let tracer = opentelemetry_otlp::new_pipeline() + .tracing() + .with_exporter( + opentelemetry_otlp::new_exporter() + .http() + .with_http_client(reqwest::Client::new()) + .with_endpoint(url) + .with_headers(headers) + .with_timeout(Duration::from_secs(3)), + ) + .with_trace_config(trace_config) + .install_batch(opentelemetry::runtime::Tokio)?; + Ok(tracer) + } +} diff --git a/src/error.rs b/src/error.rs new file mode 100644 index 0000000..4bda4a5 --- /dev/null +++ b/src/error.rs @@ -0,0 +1,22 @@ +use opentelemetry::trace; +use std::env; +use tracing_subscriber::util::TryInitError; + +/// The error type for this crate. +#[derive(thiserror::Error, Debug)] +pub enum Error { + #[error("Failed to look up AXIOM_TOKEN env: {0}")] + InvalidTokenEnv(#[from] env::VarError), + #[error("Failed to configure tracer: {0}")] + TraceError(#[from] trace::TraceError), + #[error("Failed to initialize registry: {0}")] + InitErr(#[from] TryInitError), + #[error("Token is missing")] + MissingToken, + #[error("Token is empty")] + EmptyToken, + #[error("Invalid token (please provide a personal token)")] + InvalidToken, + #[error("Invalid URL: {0}")] + InvalidUrl(#[from] url::ParseError), +} diff --git a/src/lib.rs b/src/lib.rs new file mode 100644 index 0000000..77055e3 --- /dev/null +++ b/src/lib.rs @@ -0,0 +1,82 @@ +//! Send traces to Axiom with a single line. +//! +//! # Example +//! +//! In a project that uses [Tokio](https://tokio.rs) and +//! [tracing](https://docs.rs/tracing) run `cargo add tracing-axiom` and +//! configure it like this: +//! +//! ``` +//! #[tokio::main] +//! async fn main() { +//! tracing_axiom::init(); +//! say_hello(); +//! tracing_axiom::shutdown(); +//! } +//! +//! #[tracing::instrument] +//! pub fn say_hello() { +//! tracing::info!("Hello, world!"); +//! } +//! ``` +//! +//! The example above gets the Axiom API token from the `AXIOM_TOKEN` env and +//! panics if setup fails. If you want to handle the error, use [`try_init`]. +//! For more advanced configuration, see [`builder()`]. + +use lazy_static::lazy_static; +use url::Url; + +mod builder; +mod error; + +pub use builder::Builder; +pub use error::Error; + +#[cfg(doctest)] +#[doc = include_str!("../README.md")] +pub struct ReadmeDoctests; + +lazy_static! { + pub(crate) static ref CLOUD_URL: Url = Url::parse("https://cloud.axiom.co").unwrap(); +} + +/// Initialize a global subscriber which sends traces to Axiom. +/// +/// It uses the environment variables `AXIOM_TOKEN` and optionally `AXIOM_URL` +/// to configure the endpoint. +/// If you want to manually set these, see [`Builder`]. +/// +/// # Panics +/// +/// Panics if the initialization was unsuccessful, likely because a global +/// subscriber was already installed or `AXIOM_TOKEN` is not set or invalid. +/// If you want to handle the error instead, use [`try_init`]. +pub fn init() { + Builder::new().init() +} + +/// Initialize a global subscriber which sends traces to Axiom. +/// +/// It uses the environment variables `AXIOM_TOKEN` and optionally `AXIOM_URL` +/// to configure the endpoint. +/// If you want to manually set these, see [`Builder`]. +/// +/// # Errors +/// +/// Returns an error if the initialization was unsuccessful, likely because a +/// global subscriber was already installed or `AXIOM_TOKEN` is not set or +/// invalid. +pub fn try_init() -> Result<(), Error> { + Builder::new().try_init() +} + +/// Create a new [`Builder`]. +pub fn builder() -> Builder { + Builder::new() +} + +/// Shutdown the tracer prodiver, flushing all spans. Run this before exit. +pub fn shutdown() { + opentelemetry::global::shutdown_tracer_provider(); +}