Using a Go Binary as a Credential Script for Harvest #3380

rahulguptajss · 2024-12-16T08:37:39Z

rahulguptajss
Dec 16, 2024
Collaborator

Use Case

When running Harvest inside a container, you might encounter environments where tools like jq and curl are not available. In such cases, you can use a Go binary as a credential script to fetch authentication information. This guide explains how to build and use a Go binary for this purpose.

For detailed information on configuring the credentials_script, refer to the Harvest documentation.

Writing the Go Script

Create a Go file named main.go with the following content. Note that this is a sample and you will need to modify it to fetch the relevant password for your use case:

package main

import (
    "fmt"
    "os"
    "strings"
)

func main() {
    if len(os.Args) < 2 {
        fmt.Println("Please provide an argument.")
        return
    }

    address := os.Args[1]

    pass := processInput(address)

    fmt.Println("password:", pass)
}

func processInput(address string) string {
    if address != "" {
        // process and return password
        // Add custom logic to fetch password for the address
        return strings.ToUpper(address)
    }
    return ""
}

Building the Go Binary

Build the Go binary for Linux with the following command:

GOOS=linux GOARCH=amd64 go build -o get_credentials main.go

This command will produce a standalone binary named get_credentials that can be executed on a Linux system without requiring the Go framework.

Using the Binary in a Container

When running Harvest inside a container, ensure the Go binary is available inside the container. You can achieve this by mounting the binary into the container.

Example Docker compose file:

services:
  sar:
    image: ghcr.io/netapp/harvest:latest
    container_name: sar
    restart: unless-stopped
    ports:
      - "12990:12990"
    command: '--poller sar --promPort 12990 --config /opt/harvest.yml'
    volumes:
      - ./cert:/opt/harvest/cert
      - ./harvest.yml:/opt/harvest.yml
      - ./conf:/opt/harvest/conf
      - ./get_credentials:/opt/harvest/get_credentials

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Using a Go Binary as a Credential Script for Harvest #3380

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Using a Go Binary as a Credential Script for Harvest #3380

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rahulguptajss Dec 16, 2024 Collaborator

Use Case

Writing the Go Script

Building the Go Binary

Using the Binary in a Container

Replies: 0 comments

rahulguptajss
Dec 16, 2024
Collaborator