Question -OMS and DSC installation for Rhel8.2

[PauCoda]

Hi All,

Could you please tell me how to install DSC with OMS for rhel8.2 properly?

I've tried several ways to install them and have enabled Update management in Automation Account. And I get 'not configured' status and 'Current.mof is missing'.

I used OMS extension schema:
https://docs.microsoft.com/en-gb/azure/virtual-machines/extensions/oms-linux?toc=/azure/azure-monitor/toc.json

1. First question, is it possible? We are spending a lot of days on that and would like to know if there is a chance to do it.
2. Which version of python should I use? Do I need python2 installation? Only Python3 is available after VM creation.
3. Maybe we need to install another tools, can you share them?

I would be grateful for any information.

[PauCoda]

Hi,

I executed the MS instructions.

• I installed python2,
• added 1270 Port to omiserver.conf
• used OMS extension and DSC installation
• registered VM

But I can't enable patching for this Virtual Machine in Update Management. I got error:
Hybrid runbook worker is not running. Update deployment is disabled in current_mof file: (/etc/opt/omi/conf/omsconfig/configuration/Current.mof).

I used this articles and tools:
Python2 installation: https://docs.microsoft.com/en-us/azure/azure-monitor/agents/agent-linux#python-requirement
Linux agent configuration: https://docs.microsoft.com/en-us/azure/azure-monitor/agents/agent-manage#linux-agent-3
OMS extension: https://docs.microsoft.com/en-gb/azure/virtual-machines/extensions/oms-linux?toc=/azure/azure-monitor/toc.json
DSC: yum install -y -q wget https://github.com/microsoft/PowerShell-DSC-for-Linux/releases/download/v1.2.1-0/dsc-1.2.1-0.ssl_110.x64.rpm || exit 1

For /var/opt/microsoft/omsconfig/omsconfig.log I'm getting many errors like:

2021/09/29 17:51:50: ERROR: null(0): EventId=1 Priority=ERROR Job 36EEE86D-5FBC-47C9-9419-0B9E709A3844 :
DSC Engine Error :
         Error Message FindFirstFile Failed.
        Error Code : 1
2021/09/29 17:53:44: ERROR: null(0): EventId=1 Priority=ERROR Job 36EEE86D-5FBC-47C9-9419-0B9E709A3844 :
DSC Engine Error :
         Error Message FindFirstFile Failed.
        Error Code : 1
2021/09/29 17:54:15: ERROR: null(0): EventId=1 Priority=ERROR Job 36EEE86D-5FBC-47C9-9419-0B9E709A3844 :
DSC Engine Error :
         Error Message FindFirstFile Failed.
        Error Code : 1

I found in logs "OMSAgent is multi-homed and resource is updating workspace .." for RHEL8.2 and RHEL7.8.
According MS documentation https://docs.microsoft.com/en-us/azure/automation/troubleshoot/update-agent-issues-linux#multihoming :
"Update Management doesn't support multihoming."

I see here that this variable uses existing workspace, that's why it causes multihoming..

PowerShell-DSC-for-Linux/Providers/Scripts/2.6x-2.7x/Scripts/nxOMSPlugin.py

Line 110 in 7e0a998

mh_conf_dir = os.path.join(ETC_OMSAGENT_DIR, WorkspaceID, CONF_PATH_SUFFIX)

It's strange because RHEL7.8 has the same information but we can enable Update Management.