Redfish is a industry standard protocol and specification defined by Distributed Management Task Force (DMTF) for performing systems/ IT infrastructure management actions using RESTful methodology. It is a next generation systems management interface standard which is simple, secure, scalable. Redfish uses JSON data format and transports payload over HTTPS. Initial releases of Redfish focused primarily on systems management and was targeted to be a replacement for IPMI over LAN protocol. Now the capabilities have been extended over the past few years providing a rich set of features and support for network, memory, storage devices etc. Over time the scope of Redfish is being expanded to fit more use cases as the forum is working with several partner organizations. Promoters of this standard include several companies like Broadcom, Cisco, Dell, HP, VMware, Intel, Microsoft etc.
Now, lets have a look at how to connect to iDRAC Redfish API using PowerShell. Redfish provides two authentication methods. Basic authentication and Session-based authentication. Here I will explain basic authentication using username and password for each Redfish API request to iDRAC.
#To fix the connection issues to iDRAC REST API
add-type @"
using System.Net;
using System.Security.Cryptography.X509Certificates;
public class TrustAllCertsPolicy : ICertificatePolicy {
public bool CheckValidationResult(
ServicePoint srvPoint, X509Certificate certificate,
WebRequest request, int certificateProblem) {
return true;
}
}
"@
[System.Net.ServicePointManager]::CertificatePolicy = New-Object TrustAllCertsPolicy
[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12 -bor [System.Net.SecurityProtocolType]::Tls11
#Get iDRAC creds
$Credentials = Get-Credential -Message "Enter iDRAC Creds"
#URI to get basic system info
$u1 = "https://192.168.10.11/redfish/v1/Systems/System.Embedded.1"
#Using Invoke-RestMethod
$result1 = Invoke-RestMethod -Uri $u1 -Credential $Credentials -Method Get -UseBasicParsing -ContentType 'application/json' -Headers @{"Accept"="application/json"}
Output:
Hope it was useful. Cheers!
References:
iDRAC9 Redfish API reference guide
github.com/dell/iDRAC-Redfish-Scripting
