Calyptia Core Agent
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24.4
  • Calyptia Core Agent Documentation
  • Comparison to Fluent Bit
  • Performance and Benchmarking
  • Concepts
    • Key Concepts
    • Buffering
    • Data Pipeline
      • Input
      • Parser
      • Filter
      • Buffer
      • Router
      • Output
  • Installation
    • Getting Started with Calyptia Core Agent
    • Supported Platforms
    • Linux
      • RHEL-based
      • Debian-based
    • Docker
    • Kubernetes
    • macOS
    • Windows
  • Administration
    • Configuring Calyptia Core Agent
      • Classic mode
        • Format and Schema
        • Configuration File
        • Variables
        • Commands
        • Upstream Servers
        • Record Accessor
      • YAML Configuration File
      • Unit Sizes
      • Multiline Parsing
    • Transport Security
    • Buffering & Storage
    • Backpressure
    • Scheduling and Retries
    • Networking
    • Memory Management
    • Monitoring
    • HTTP Proxy
    • Hot Reload
    • Troubleshooting
  • Local Testing
    • Validating your Data and Structure
    • Running a Logging Pipeline Locally
  • Data Pipeline
    • Inputs
      • Collectd
      • CPU Log Based Metrics
      • Disk I/O Log Based Metrics
      • Docker Log Based Metrics
      • Docker Events
      • Dummy
      • Elasticsearch
      • Exec
      • Exec Wasi
      • Fluent Bit Metrics
      • Forward
      • Head
      • HTTP
      • Kafka
      • Health
      • Kernel Logs
      • Memory Metrics
      • MQTT
      • Network I/O Log Based Metrics
      • NGINX Exporter Metrics
      • Node Exporter Metrics
      • Podman Metrics
      • Process Log Based Metrics
      • Prometheus Scrape Metrics
      • Random
      • Serial Interface
      • Standard Input
      • StatsD
      • Syslog
      • Systemd
      • Tail
      • TCP
      • Thermal
      • OpenTelemetry
      • Windows Event Log
      • Windows Event Log (winevtlog)
      • Windows Exporter Metrics
    • Parsers
      • Configuring Parser
      • JSON
      • Regular Expression
      • LTSV
      • Logfmt
      • Decoders
    • Filters
      • AWS Metadata
      • CheckList
      • ECS Metadata
      • Expect
      • GeoIP2 Filter
      • Grep
      • Kubernetes
      • Log to Metrics
      • Lua
      • Parser
      • Record Modifier
      • Modify
      • Multiline
      • Nest
      • Nightfall
      • Rewrite Tag
      • Standard Output
      • Throttle
      • Tensorflow
      • Wasm
    • Outputs
      • Amazon CloudWatch
      • Amazon Kinesis Data Firehose
      • Amazon Kinesis Data Streams
      • Amazon S3
      • Azure Blob
      • Azure Data Explorer
      • Azure Log Analytics
      • Counter
      • Datadog
      • Elasticsearch
      • File
      • FlowCounter
      • Forward
      • GELF
      • Google Cloud BigQuery
      • HTTP
      • InfluxDB
      • Kafka
      • Kafka REST Proxy
      • LogDNA
      • Loki
      • NATS
      • New Relic
      • NULL
      • Observe
      • OpenSearch
      • OpenTelemetry
      • PostgreSQL
      • Prometheus Exporter
      • Prometheus Remote Write
      • SkyWalking
      • Slack
      • Splunk
      • Stackdriver
      • Standard Output
      • Syslog
      • TCP & TLS
      • Treasure Data
      • Vivo Exporter
      • WebSocket
  • Calyptia Core Agent for Developers
    • Golang Output Plugins
    • WASM Filter Plugins
    • WASM Input Plugins
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On this page
  • Prerequisites
  • For Build WASM programs
  • Build a WASM Input for Input Plugin
  • To Install Additional Components
  • Requirements of WASM/WASI programs
  1. Calyptia Core Agent for Developers

WASM Input Plugins

PreviousWASM Filter Plugins

Last updated 1 year ago

is binary instruction format for stack based virtual machine.

Calyptia Fluent Bit currently supports integration of wasm plugins built as wasm/wasi objects for input and filter plugins only. The interface for the WASM filter plugins is currently under development but is functional.

Prerequisites

For Build WASM programs

Currently, Calyptia Fluent Bit supports the following WASM toolchains:

  • Rust on wasm32-unknown-unknown.

    • rustc 1.62.1 (e092d0b6b 2022-07-16) or later

  • on wasm32-wasi

    • v0.24.0 or later

  • 13 or later.

Build a WASM Input for Input Plugin

Currently, Calyptia Fluent Bit's WASM input assumes WASI ABI that is also known as wasm32-wasi on Rust target and wasm32-wasi on TinyGo target.

To Install Additional Components

TinyGo and WASI SDK support wasm target by default. When using Rust's wasm32-wasi target, users must install wasm32-wasi via . Then, installing that target components as:

$ rustup target add wasm32-wasi

Requirements of WASM/WASI programs

WASM input plugins execute the function that has wasi main function entrypoint. And Calyptia Fluent Bit's WASM input plugin communicates via stdout on WASM programs.

WASM programs should handle stdout for ingesting logs into Calyptia Fluent Bit.

Once built, a WASM/WASI program will be available. Then, that built program can be executed with the following Calyptia Fluent Bit configuration:

[INPUT]
    Name exec_wasi
    Tag  exec.wasi.local
    WASI_Path /path/to/wasi_built_json.wasm
    # For security reasons, WASM/WASI program cannot access its outer world
    # without accessible permissions.
    # accessible_paths .,/path/to/calyptia-fluent-bit

[OUTPUT]
    Name  stdout
    Match *

For further example that handles structured logs, calyptia-fluent-bit has a Rust serde-json example: https://github.com/fluent/fluent-bit/tree/master/examples/wasi_serde_json

WebAssembly
TinyGo
WASI SDK
rustup