An example of a fairing for rocket to use tracing (as this pops up at many places in dicussions and questions)

Related tags

Utilities async rocket tracing tokio tokio-rs fairing
Overview

Rocket Tracing Fairing Example

Open in Gitpod

This repository aims to give a short example of how you can add a Fairing to your Rocket for tracing and how to use it in requests.

As Rocket currently doesn't implement this by default many have asked about implementing this. The actix-web tracing crate has been taken as a reference for the info span data

Logging

There 2 log types and 5 log levels you can configure at runtime.

Log Types

Log types control how your output is formatted. They can be controlled via the environment variable LOG_TYPE.

The 2 types are:

  • formatted(default): a good choice for development
  • json: the propert choice if you are running your app in a production environment. If you are using vector you can check out parse_json(...)

Log Levels

A lot of that code originated from a stable PR in rocket's repository SergioBenites/Rocket#1579 so thanks a lot to the people there and @jebrosen for the awesome work.

You can controll these with the environment variable LOG_LEVEL:

  • critical: Shows only critical logs
  • support: Shows logs to help out
  • normal: Includes all your default logs
  • debug: Shows debuging with tracing
  • off: Shows exactly nothing

Request-Tracing

You need to add the enter and drop statements inside your request as Rocket will not enter the span by default as it is currently not implemented in the base repository.

Names

If your parser follows the opentelemetry spec it will pick up the otel.name field as the name of the span which is a composit of the uri path and the method

Request Ids

You may be hosting rocket on a platform which provides it's own request ids via the X-Request-Id standard. If so rocket will pick this up and add it to the request span.

If not rocket will create a uuid, use that and append it as the X-Request-Id header to the response.

Why isn't this a crate?

As of right now I have has 4 people asking me the same question about tracing and rocket from difference perspektives within 4 days. If more people point out their desire to have a crate for this please open an issue and let the people vote.

Comments
  • fix(deps): update rust crate serde to 1.0.148

    fix(deps): update rust crate serde to 1.0.148

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    This PR contains the following updates:

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    serde-rs/serde

    v1.0.148

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    • Support remote derive for generic types that have private fields (#​2327)

    v1.0.147

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    • Add serde::de::value::EnumAccessDeserializer which transforms an EnumAccess into a Deserializer (#​2305)

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  • fix(deps): update rust crate serde_json to 1.0.89

    fix(deps): update rust crate serde_json to 1.0.89

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    This PR contains the following updates:

    | Package | Type | Update | Change | |---|---|---|---| | serde_json | dependencies | patch | 1.0.85 -> 1.0.89 |

    Release Notes

    serde-rs/json

    v1.0.89

    Compare Source

    • Fix invalid JSON incorrectly accepted when a large number has no digits after decimal point (#​953)

    v1.0.88

    Compare Source

    • Optimize serde_json::Map's implementation of append and clone_from (#​952, thanks @​Lucretiel)

    v1.0.87

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    • Add write_i128 and write_u128 methods to serde_json::Formatter to control the formatting of 128-bit integers (#​940, thanks @​Lucretiel)

    v1.0.86

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  • fix(deps): update rust crate uuid to 1.2.2

    fix(deps): update rust crate uuid to 1.2.2

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    This PR contains the following updates:

    | Package | Type | Update | Change | |---|---|---|---| | uuid | dependencies | minor | 1.1.2 -> 1.2.2 |

    Release Notes

    uuid-rs/uuid

    v1.2.2

    Compare Source

    What's Changed

    Full Changelog: https://github.com/uuid-rs/uuid/compare/1.2.1...1.2.2

    v1.2.1

    Compare Source

    What's Changed

    Full Changelog: https://github.com/uuid-rs/uuid/compare/1.2.0...1.2.1

    v1.2.0

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    What's Changed

    New Contributors

    Full Changelog: https://github.com/uuid-rs/uuid/compare/1.1.2...1.2.0

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  • fix(deps): update rust crate tracing-subscriber to 0.3.16

    fix(deps): update rust crate tracing-subscriber to 0.3.16

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    This PR contains the following updates:

    | Package | Type | Update | Change | |---|---|---|---| | tracing-subscriber (source) | dependencies | patch | 0.3.15 -> 0.3.16 |

    Release Notes

    tokio-rs/tracing

    v0.3.16: tracing-subscriber 0.3.16

    Compare Source

    This release of tracing-subscriber fixes a regression introduced in v0.3.15 where Option::None's Layer implementation would set the max level hint to OFF. In addition, it adds several new APIs, including the Filter::event_enabled method for filtering events based on fields values, and the ability to log internal errors that occur when writing a log line.

    This release also replaces the dependency on the unmaintained [ansi-term] crate with the [nu-ansi-term] crate, resolving an informational security advisory (RUSTSEC-2021-0139) for [ansi-term]'s maintainance status. This increases the minimum supported Rust version (MSRV) to Rust 1.50+, although the crate should still compile for the previous MSRV of Rust 1.49+ when the ansi feature is not enabled.

    Fixed
    • layer: Option::None's Layer impl always setting the max_level_hint to LevelFilter::OFF (#​2321)
    • Compilation with -Z minimal versions (#​2246)
    • env-filter: Clarify that disabled level warnings are emitted by tracing-subscriber (#​2285)
    Added
    • fmt: Log internal errors to stderr if writing a log line fails (#​2102)
    • fmt: FmtLayer::log_internal_errors and FmtSubscriber::log_internal_errors methods for configuring whether internal writer errors are printed to stderr (#​2102)
    • fmt: #[must_use] attributes on builders to warn if a Subscriber is configured but not set as the default subscriber (#​2239)
    • filter: Filter::event_enabled method for filtering an event based on its fields (#​2245, #​2251)
    • filter: Targets::default_level accessor ([#​2242])
    Changed
    • ansi: Replaced dependency on unmaintained ansi-term crate with nu-ansi-term ((#​2287, fixes informational advisory RUSTSEC-2021-0139)
    • tracing-core: updated to 0.1.30
    • Minimum Supported Rust Version (MSRV) increased to Rust 1.50+ (when the ansi) feature flag is enabled (#​2287)
    Documented
    • fmt: Correct inaccuracies in fmt::init documentation (#​2224)
    • filter: Fix incorrect doc link in filter::Not combinator (#​2249)

    Thanks to new contributors @​cgbur, @​DesmondWillowbrook, @​RalfJung, and @​poliorcetics, as well as returning contributors @​CAD97, @​connec, @​jswrenn, @​guswynn, and @​bryangarza, for contributing to this release!

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  • fix(deps): update rust crate tracing to 0.1.37

    fix(deps): update rust crate tracing to 0.1.37

    Mend Renovate

    This PR contains the following updates:

    | Package | Type | Update | Change | |---|---|---|---| | tracing (source) | dependencies | patch | 0.1.36 -> 0.1.37 |

    Release Notes

    tokio-rs/tracing

    v0.1.37: tracing 0.1.37

    Compare Source

    This release of tracing incorporates changes from tracing-core v0.1.30 and tracing-attributes v0.1.23, including the new Subscriber::on_register_dispatch method for performing late initialization after a Subscriber is registered as a Dispatch, and bugfixes for the #[instrument] attribute. Additionally, it fixes instances of the bare_trait_objects lint, which is now a warning on tracing's MSRV and will become an error in the next edition.

    Fixed
    • attributes: Incorrect handling of inner attributes in #[instrument]ed functions (#​2307)
    • attributes: Incorrect location of compiler diagnostic spans generated for type errors in #[instrument]ed async fns (#​2270)
    • attributes: Updated syn dependency to fix compilation with -Z minimal-versions (#​2246)
    • bare_trait_objects warning in valueset! macro expansion (#​2308)
    Added
    • core: Subscriber::on_register_dispatch method (#​2269)
    • core: WeakDispatch type and Dispatch::downgrade() function (#​2293)
    Changed
    • tracing-core: updated to 0.1.30
    • tracing-attributes: updated to 0.1.23
    Documented
    • Added [tracing-web][tracing-web] and [reqwest-tracing][reqwest-tracing] to related crates (#​2283, #​2331)

    Thanks to new contributors @​compiler-errors, @​e-nomem, @​WorldSEnder, @​Xiami2012, and @​tl-rodrigo-gryzinski, as well as @​jswrenn and @​CAD97, for contributing to this release!

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  • fix(deps): update rust crate serde to 1.0.145

    fix(deps): update rust crate serde to 1.0.145

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    This PR contains the following updates:

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    v1.0.145

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  • fix(deps): update rust crate serde_json to 1.0.85

    fix(deps): update rust crate serde_json to 1.0.85

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    This PR contains the following updates:

    | Package | Type | Update | Change | |---|---|---|---| | serde_json | dependencies | patch | 1.0.83 -> 1.0.85 |

    Release Notes

    serde-rs/json

    v1.0.85

    Compare Source

    • Make Display for Number produce the same representation as serializing (#​919)

    v1.0.84

    Compare Source

    • Make Debug impl of serde_json::Value more compact (#​918)

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  • fix(deps): update rust crate serde to 1.0.144

    fix(deps): update rust crate serde to 1.0.144

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    This PR contains the following updates:

    | Package | Type | Update | Change | |---|---|---|---| | serde (source) | dependencies | patch | 1.0.143 -> 1.0.144 |

    Release Notes

    serde-rs/serde

    v1.0.144

    Compare Source

    • Change atomic ordering used by Serialize impl of atomic types to match ordering used by Debug impl of those same types (#​2263, thanks @​taiki-e)

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  • fix(deps): update rust crate serde to 1.0.143

    fix(deps): update rust crate serde to 1.0.143

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    This PR contains the following updates:

    | Package | Type | Update | Change | |---|---|---|---| | serde (source) | dependencies | patch | 1.0.142 -> 1.0.143 |

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    serde-rs/serde

    v1.0.143

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    • Invert build.rs cfgs in serde_test to produce the most modern configuration in the default case (#​2253, thanks @​taiki-e)

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  • fix(deps): update rust crate serde to 1.0.142

    fix(deps): update rust crate serde to 1.0.142

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    This PR contains the following updates:

    | Package | Type | Update | Change | |---|---|---|---| | serde (source) | dependencies | patch | 1.0.141 -> 1.0.142 |

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    serde-rs/serde

    v1.0.142

    Compare Source

    • Add keywords to crates.io metadata

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  • fix(deps): update rust crate serde_json to 1.0.83

    fix(deps): update rust crate serde_json to 1.0.83

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  • fix(deps): update rust crate serde_json to 1.0.91

    fix(deps): update rust crate serde_json to 1.0.91

    Mend Renovate

    This PR contains the following updates:

    | Package | Type | Update | Change | |---|---|---|---| | serde_json | dependencies | patch | 1.0.89 -> 1.0.91 |

    Release Notes

    serde-rs/json

    v1.0.91

    Compare Source

    • Opt out of -Zrustdoc-scrape-examples on docs.rs for now

    v1.0.90

    Compare Source

    • Documentation improvements

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  • fix(deps): update rust crate serde to 1.0.152

    fix(deps): update rust crate serde to 1.0.152

    Mend Renovate

    This PR contains the following updates:

    | Package | Type | Update | Change | |---|---|---|---| | serde (source) | dependencies | patch | 1.0.148 -> 1.0.152 |

    Release Notes

    serde-rs/serde

    v1.0.152

    Compare Source

    • Documentation improvements

    v1.0.151

    Compare Source

    • Update serde::{ser,de}::StdError to re-export core::error::Error when serde is built with feature="std" off and feature="unstable" on (#​2344)

    v1.0.150

    Compare Source

    • Relax some trait bounds from the Serialize impl of HashMap and BTreeMap (#​2334)
    • Enable Serialize and Deserialize impls of std::sync::atomic types on more platforms (#​2337, thanks @​badboy)

    v1.0.149

    Compare Source

    • Relax some trait bounds from the Serialize impl of BinaryHeap, BTreeSet, and HashSet (#​2333, thanks @​jonasbb)

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  • Questions & Suggestions

    Questions & Suggestions

    Thanks for creating this repo, it is quite helpful! Continuing the discussion from https://github.com/SergioBenitez/Rocket/issues/982 :

    Questions

    1. Why the need to pass Option::None to .local_cache() in the response methods? As I understood, you can pass a new value and if there is, e.g., a request_id already that is there, it won't be created. Or I got this wrong?
    2. Can you use the #[instrument] macro with this instead of the explicit enter and drop? (maybe I am wrong but I thought that the span is dropped automatically when the scope ends)
    3. Where is the documentation regarding the kind of things you do in filter_layer()? (Rocket options like rocket::support=info or hyper=off), I didn't know you can do that.

    Suggestions

    • It might be helpful to add a screenshot(s) of a "demo" of how the logs look like etc.
    • What if I want to add a name to the span to identify it's function? In your examples it's always "request". Can TracingSpan include a name field in it?
    • Isn't it better to make a new or generate method for RequestId instead of calling it default? Seems more intuitive to me.
    • What if I want a debug log level but not trace? As I understand, your debug level includes both.

    I had more questions, once I remember them I'll post it here.

    Thank you very much!

    opened by oren0e 15
  • Dependency Dashboard

    Dependency Dashboard

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    These updates have all been created already. Click a checkbox below to force a retry/rebase of any.

    Detected dependencies

    cargo
    Cargo.toml
    • rocket 0.5.0-rc.2
    • serde 1.0.148
    • serde_json 1.0.89
    • tracing 0.1.37
    • tracing-appender 0.2.2
    • tracing-log 0.1.3
    • tracing-subscriber 0.3.16
    • uuid 1.2.2
    • yansi 0.5.1
    dockerfile
    .gitpod.Dockerfile
    • chweicki/gitpod-rust-workspace 0.1.3
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Owner
Christof Weickhardt
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