Rust Getting Started Docs Error - the trait bound `opentelemetry_stdout::SpanExporter: opentelemetry_sdk::export::trace::SpanExporter` is not satisfied

[TownCube]

What needs to be changed?
Update Rust Getting Started example so it compiles.

What is the name + path of the page that needs changed? https://opentelemetry.io/docs/languages/rust/getting-started/

Additional context: The error I get after copy/pasting the getting started example:

error[E0277]: the trait bound `opentelemetry_stdout::SpanExporter: opentelemetry_sdk::export::trace::SpanExporter` is not satisfied
   --> src/dice_server.rs:40:31
    |
40  |         .with_simple_exporter(SpanExporter::default())
    |          -------------------- ^^^^^^^^^^^^^^^^^^^^^^^ the trait `opentelemetry_sdk::export::trace::SpanExporter` is not implemented for `opentelemetry_stdout::SpanExporter`
    |          |
    |          required by a bound introduced by this call
    |
help: trait impl with same name found
   --> /home/TownCube/.cargo/registry/src/index.crates.io-6f17d22bba15001f/opentelemetry-stdout-0.27.0/src/trace/exporter.rs:33:1
    |
33  | impl opentelemetry_sdk::export::trace::SpanExporter for SpanExporter {
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    = note: perhaps two different versions of crate `opentelemetry_sdk` are being used?
note: required by a bound in `opentelemetry_sdk::trace::Builder::with_simple_exporter`
   --> /home/TownCube/.cargo/registry/src/index.crates.io-6f17d22bba15001f/opentelemetry_sdk-0.22.1/src/trace/provider.rs:161:36
    |
161 |     pub fn with_simple_exporter<T: SpanExporter + 'static>(self, exporter: T) -> Self {
    |                                    ^^^^^^^^^^^^ required by this bound in `Builder::with_simple_exporter`

Bumping the versions seems to resolve it but didn't want to blindly raise a PR to update without understanding the ramifications in case this break is a sign of something bigger not working correctly.

opentelemetry = "0.27.1"
opentelemetry_sdk = "0.27.1"
opentelemetry-stdout = { version = "0.27.0", features = ["trace"] }

[svrnm]

@open-telemetry/rust-approvers please take a look

[cijothomas]

The versions are mismatched it seems. The current doc shows stdout newer version but keeps older version for api and sdk. Didn't realize that https://github.com/open-telemetry/opentelemetry.io/pull/5633/files affects the getting started docs, unfortunately:(

@TownCube updating all crates to newest would be the right fix.

[svrnm]

The versions are mismatched it seems. The current doc shows stdout newer version but keeps older version for api and sdk. Didn't realize that #5633 (files) affects the getting started docs, unfortunately:(

can you point me to the lines in the documentation where the versions need to be kept in sync?

[cijothomas]

https://opentelemetry.io/docs/languages/rust/getting-started/#instrumentation
opentelemetry = "0.22.0"
opentelemetry_sdk = "0.22.1"
opentelemetry-stdout = { version = "0.27.0", features = ["trace"] }

^This. If all are on 0.27.0, things would compile.

(Rust is preparing RC and 1.0 stable in a month or so, and we can come back to edit all docs here.)

[svrnm]

opentelemetry = "{{% version-from-registry otel-rust %}}"
opentelemetry_sdk = "{{% version-from-registry otel-rust-sdk %}}"
opentelemetry-stdout = { version = "{{% version-from-registry exporter-rust-stdout %}}", features = ["trace"] }

they all pick the version from the registry, but currently they are not auto updated via this script:

https://github.com/open-telemetry/opentelemetry.io/blob/main/.github/workflows/scripts/update-registry-versions.sh

let me take a look if this is fixable via automation, such that they will be up-to-date as new releases are made

[svrnm]

@cijothomas since #5760 is not possible until the v1.0 release we would need to track updates manually.