Output a JSON log

[ravenac95]

In order to improve the logging as a debugging tool it would be nice to have JSON logs from all containers so that we easily parse (our centralized logging does this automatically) information to have more organized and easier to search through logs.

Useful information to have in logs:

Some caveats with our logging infrastructure:

• The JSON parsing of logs on elasticsearch assumes that field's type is static. It implies the type based on the first occurrence of a field for the day. For example, if you have the log {"foo": 13, "message": "hello"} the type for foo will be a number for the rest of the day. If, later in the same day, elasticsearch encounters a log {"foo": "some_string", "message": "hello"} then the log message will fail to parse correctly, an error will be generated on the logstash logs, and elasticsearch will NOT have that data available.

An identical issue will also be posted on runtime-ethereum

Acceptance Criteria

• All applications output JSON logs by default

[kostko]

The Go node already outputs JSON logs.

The Rust compute worker currently doesn't and the Rust log crate that we use currently does not support structured logging. We would need to switch to something like slog to support this. Shouldn't be that hard but requires some work.