connect-secret.ps1

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<#
The Author is Loompas0 who is a pseudo.
The source site of the code couldbe https://github.com/loompas0/ 
if you are explicitely or implicitely authorized to access to it.
#>

# History 
# - 09/10/2023 creation and first tests

# Read file listing all DC datacenters.json
$DCFile = Get-Content -path .\datacenters.json -Raw | ConvertFrom-Json -ErrorAction Stop
# define title of the menu
$Title = "On Which DC Do you want to be connected"
# count number of lines in the array from Json file
$NbDc = $DCFile.DataCenters.Count
# Handle menu in a function
function Show-Menu 
{
    
    $textline = “$i : Press ‘$i’ for the datacenter $DcName ($DcIp).”
   # write Menu
    Write-Host $textline 

}

Write-Host “== $Title ==”

for (($i=0); $i -lt $NbDc; $i++)
    {
        
        $DcName = $DCFile.DataCenters.DCName[$i]
        $DcIp = $DCFile.DataCenters.ServerIp[$i]
        
        Show-Menu 
        
    }

$DC = Read-Host “Please make a selection”
if ($DC -gt $NbDc-1) 
{
    Write-Error "Number is out of scope" -ErrorAction Stop
}

$zvmAddress = $DCFile.DataCenters.ServerIp[$DC]
$keycloakClientID = $DCFile.DataCenters.KeycloakClientID[$DC]
$keycloakClientSecret = $DCFile.DataCenters.KeycloakClientSecret[$DC]

# Write-Host $zvmAddress
# Write-Host $keycloakClientID
# Write-Host $keycloakClientSecret

$skipCertificateCheck = $true       # for self-signed certs, so this flag is passed to Invoke-RestMethod to allow it to proceed.

# Nothing below this line needs to be changed

# Setup API string conventions for later use

$keyCloakApiBase = "https://" + $zvmAddress + "/auth/realms/zerto/protocol/openid-connect/token"
$zvmApiBase = "https://" + $zvmAddress + "/v1/" 

# Connect to Keycloak with secret and get token
# Note: using Splat concept to neatly layout the arguments for Headers, Body, Method, and URI before making the call
# Splat is defined like a variable ($ prefix) but referenced in special way (@ prefix) which maps parameter/value for the function as key value pairs

$request = @{

    Headers     = @{
        ContentType  = "application/x-www-form-urlencoded"
    }

    Body        = @{
        client_id = $keycloakClientID
        client_secret = $keycloakClientSecret
        grant_type = "client_credentials"
    }
 
    StatusCodeVariable = "statusCode"

    Method      = "POST"
    URI = $keyCloakApiBase

    SkipCertificateCheck = $skipCertificateCheck
}

try {
    $result = Invoke-RestMethod @request
}
catch {
    Write-Error "Error connecting to Keycloak" -ErrorAction Stop
}
$token = $result.access_token