Posts Categorized: Uncategorized

Proxmox: adding internal private nework

In this scenario I wanted to be able to run several VMs that can communicate with each other on a private subnet e.g. 10.10.10.* and also be access the internet for updates etc. Eventually I want to expose some of the internal services. My proxmox server has one network interface with an internet facing IP… Read more »

SELinux: Create Policy for NRPE Writing

Had a problem with Nagios/NRPE checks that are configured to write a status file as part of their check. The path /var/logstate was the target created the policy below. Andrew (Urban Penguin) Youtube video is an excellent resource. Install selinux utilities: yum install policycoreutils policycoreutils-devel setools-console setroubleshoot The audit log (/var/log/audit/audit.log) was showing the type=AVC… Read more »

Nagios NRPE omreport errors

Nagios check for Dell OpenManage was failing after upgrade to srvadmin 9.2 with: UNKNOWN: Problem running ‘omreport chassis memory’: Error: SMStatus: 700 UNKNOWN: Problem running ‘omreport chassis batteries’: Error! XML Transformation failed UNKNOWN: Problem running ‘omreport chassis pwrmonitoring’: Error: SMStatus: 700 UNKNOWN: Problem running ‘omreport chassis removableflashmedia’: Error: SMStatus: The check command: /usr/lib64/nagios/plugins/check_openmanage -s -b… Read more »

ThingsBoard API: Get telemetry values

I’m using Insomnia for testing and after already getting the auth token I use that in Insomnia as follows: The URL I used for the query was: The word device in there does not need to be changed by the ID field that follows it should be changed to the UUID of your device. You… Read more »

Blink Hard Disk Light on Dell

To blink the light on a hard disk on Dell Server from the command line first get a list of the physical disks so you can check the disk ID: omreport storage pdisk controller=0 then to blink the disk: omconfig storage pdisk action=blink controller=0 pdisk=0:0:2

CLI RAID Disk Layout on Dell Servers

Newer iDRAC web interfaces show the physical and virtual disks on a PERC controller but for older servers with an old iDRAC use openmanage on the command-line. To view a list of the physical disks: omreport storage pdisk controller=0 To view a list of the virtual disks: omreport storage vdisk controller=0 To check which physical… Read more »

Reboot Linux Server

On a server where normal reboot commands such as ‘shutdown -r now’ are not working and if you don’t have access to an iDrac or similar the following worked: echo 1 > /proc/sys/kernel/sysrq echo b > /proc/sysrq-trigger