Exec Wasi
The exec_wasi input plugin, allows to execute WASM program that is WASI target like as external program and collects event logs from there.
The plugin supports the following configuration parameters:
Key | Description |
|---|---|
WASI_Path | The place of a WASM program file. |
Parser | Specify the name of a parser to interpret the entry as a structured message. |
Accessible_Paths | Specify the whilelist of paths to be able to access paths from WASM programs. |
Interval_Sec | Polling interval (seconds). |
Interval_NSec | Polling interval (nanosecond). |
Buf_Size | |
Oneshot | Only run once at startup. This allows collection of data precedent to fluent-bit's startup (bool, default: false) |
Here is a configuration example. in_exec_wasi can handle parser. To retrieve from structured data from WASM program, you have to create parser.conf:
Note that
Time_Format should be aligned for the format of your using timestamp. In this documents, we assume that WASM program should write JSON style strings into stdout.[PARSER]
Name wasi
Format json
Time_Key time
Time_Format %Y-%m-%dT%H:%M:%S.%L %z
Then, you can specify the above parsers.conf in the main fluent-bit configuration:
[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/program.wasm
Accessible_Paths .,/path/to/accessible
Parser wasi
[OUTPUT]
Name stdout
Match *
Last modified 1d ago