Alright, let's tackle this step by step. Since your initial SNMP Walk didn't turn up temperature data, we'll focus on server-specific methods that are far more reliable for each of your three hosts—starting with the one most likely to give you results quickly.

Dell PowerEdge R630 (Highest Success Rate) #

Dell’s ESXi integration for hardware metrics is top-notch, so this host should be your first stop:

• Option 1: Use ESXi’s Built-in CLI
  SSH into your R630’s ESXi host and run this command to pull all temperature sensors directly:

  esxcli hardware ipmi sdr list --type temperature
  

  You’ll get a clean output with sensor names, current temperatures, threshold values, and statuses. Parse this with a quick script (using awk, Python, or whatever you prefer) and push the data straight to your database.
• Option 2: Enable Dell-Specific SNMP MIBs
  If you still want to use SNMP, install Dell’s OpenManage Server Administrator (OMSA) VIB on the ESXi host (it’s included in Dell’s customized ESXi ISO, or you can download it separately). Then load Dell’s MIBs into your SNMP manager and walk the 1.3.6.1.4.1.674.10892.5.4.1000.10 OID tree—this holds all temperature sensor data.

IBM System x3550 M4 #

IBM servers rely on their Integrated Management Module (IMM) for hardware monitoring. Here’s how to grab temps:

• Option 1: ESXi CLI with IPMI
  First, enable IPMI access in the server’s BIOS/IMM settings. Then SSH into ESXi and run:

  esxcli hardware ipmi sdr list --type temperature
  

  If this doesn’t work, make sure you’re using IBM’s customized ESXi ISO (it includes the necessary drivers for IPMI communication).
• Option 2: Query the IMM Directly
  Bypass ESXi entirely and pull data from the IMM’s API. Use curl to get JSON-formatted temperature data:

  curl -u <imm-username>:<imm-password> https://<imm-ip-address>/rest/api/sensors/temperature
  

  JSON is super easy to parse and insert into your database.

IBM System x3250 M3 #

This is an older server, so ESXi 6.5 support is more limited—but you still have options:

• IPMI via ESXi CLI
  Enable IPMI in the server’s BIOS, then run the same esxcli command as above. If ESXi doesn’t recognize the sensors, you’ll need to use the IBM Remote Supervisor Adapter (RSA) instead—either via its web UI or CLI to pull temps directly from the management controller.
• SNMP with IBM System x MIBs
  Load the IBM System x MIBs (specifically the ibm-x3250m3.mib) into your SNMP manager. Enable SNMP on the server’s RSA/IMM (not just ESXi) and walk the 1.3.6.1.4.1.2.3.51.2.2.10 OID tree to access temperature data.

Fallback: vSphere API (Works for All Hosts) #

If the server-specific methods fail, use the vSphere API to pull hardware health data. With PowerCLI, this is straightforward:

Connect-VIServer -Server <esxi-host-ip> -User <esxi-username> -Password <esxi-password>
Get-VMHostHardwareStatus | Select-Object -ExpandProperty Sensors | Where-Object {$_.Type -eq "Temperature"}

This returns structured objects with all temperature sensor details—perfect for exporting to your database.

Pro Tip #

Start with the Dell R630 first—its ESXi integration is the most robust, so you’re almost guaranteed to get temperature data quickly. For the IBM hosts, prioritizing the IMM/RSA direct queries will often yield better results than relying on ESXi’s native tools.

内容的提问来源于stack exchange，提问作者Nikita Seliverstov