Module is called 'skel'. Configure with

  $ ./configure skel

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

Allow format to be an object to generate JSON logs. The object keys
become JSON field names, and values support string, variable, and JS.

Note that when there is no JS in the format values, the object will
be pre-serialized to a JSON template string at configuration phase
for better performance.

Example config:
  {
    "access_log": {
      "path": "/tmp/access.log",
      "format": {
        "remote_addr": "$remote_addr",
        "time_local": "$time_local",
        "request_line": "$request_line",
        "status": "$status",
        "body_bytes_sent": "$body_bytes_sent",
        "header_referer": "$header_referer",
        "header_user_agent": "$header_user_agent"
      }
    }
  }

This is a preparatory refactoring for upcoming JSON format support
in access log. We will extend format option to access object for
JSON support.

No functional changes.

This is a preparatory refactoring for upcoming JSON format support
in access log.

No functional changes.

This is a preparatory refactoring for upcoming JSON format support
in access log.

No functional changes.

Adds code responsible for users to apply the `telemetry` configuration
options.

configuration snippet as follows:
{
    "settings": {
        "telemetry": {
            "batch_size": 20,
            "endpoint": "http://lgtm:4318/v1/traces",
            "protocol": "http",
            "sampling_ratio": 1
        }
    },
    "listeners": {
        "*:80": {
            "pass": "routes"
        }
    },
    "routes": [
        {
            "match": {
                "headers": {
                    "accept": "*text/html*"
                }
            },
            "action": {
                "share": "/usr/share/unit/welcome/welcome.html"
            }
        },
        {
            "action": {
                "share": "/usr/share/unit/welcome/welcome.md"
            }
        }
    ]
}

Signed-off-by: Ava Hahn <a.hahn@f5.com>
Signed-off-by: Gabor Javorszky <g.javorszky@f5.com>

Enables Unit to parse the tracestate and traceparent headers and add it
to the list, as well as calls to nxt_otel_test_and_call_state.

Signed-off-by: Ava Hahn <a.hahn@f5.com>
Signed-off-by: Gabor Javorszky <g.javorszky@f5.com>

Adds the --otel flag to the configure command and the various build time
variables and checks that are needed in this flow.

It also includes the nxt_otel.c and nxt_otel.h files that are needed for
the rest of Unit to talk to the compiled static library that's generated
from the rust crate.

Signed-off-by: Ava Hahn <a.hahn@f5.com>
Co-authored-by: Gabor Javorszky <g.javorszky@f5.com>
Signed-off-by: Gabor Javorszky <g.javorszky@f5.com>

This is purely the source code of the rust end of opentelemetry. It does
not have build tooling wired up yet, nor is this used from the C code.

Signed-off-by: Ava Hahn <a.hahn@f5.com>
Signed-off-by: Gabor Javorszky <g.javorszky@f5.com>

This fixes an issue we had with wasm-wasi-component failing to load
components with

  2024/11/06 21:08:50 [alert] 107196#107196 failed to create initial state

  Caused by:
      0: failed to compile component
      1: WebAssembly translation error
      2: Invalid input WebAssembly code at offset 15936: zero byte expected

Which was a symptom of
<https://github.com/bytecodealliance/wasmtime/issues/9130>

Closes: https://github.com/nginx/unit/issues/1477
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>