Fluent Bit / wasi_serde_json

This source source tree provides an example of WASM program with WASI mode.

Prerequisites

Rust
- rustc 1.61.0 (fe5b13d68 2022-05-18)
rustup (For preparing rust compiler and toolchains)

How to build

Add wasm32-wasip1 target for Rust toolchain:

console

$ rustup target add wasm32-wasip1

Then, execute cargo build as follows:

console

$ cargo build --target wasm32-wasip1 --release

Finally, under target/wasm32-wasip1/release directory, *.wasm file will be created:

console

$ ls target/wasm32-wasip1/release/*.wasm
target/wasm32-wasip1/release/wasi_serde_json.wasm

How to confirm WASI integration

Create parsers.conf as follows:

ini

[PARSER]
    Name        wasi
    Format      json
    Time_Key    time
    Time_Format %Y-%m-%dT%H:%M:%S.%L %z

And Create fluent-bit configuration file as follows:

ini

[SERVICE]
    Flush        1
    Daemon       Off
    Parsers_File parsers.conf
    Log_Level    info
    HTTP_Server  Off
    HTTP_Listen  0.0.0.0
    HTTP_Port    2020

[INPUT]
    Name exec_wasi
    Tag  exec.wasi.local
    WASI_Path /path/to/wasi_serde_json.wasm
    Parser wasi

[OUTPUT]
    Name  stdout
    Match *