02
Dec
2019

Proxmox: adding internal private nework

Uncategorized

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... » More
22
Nov
2019

SELinux: Create Policy for NRPE Writing

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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... » More

12
Nov
2019

Nagios NRPE omreport errors

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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:... » More

05
Nov
2019

check_mk: Check http service

check_mk

In the WATO menu choose 'Check Plugins' and then 'Networking checks without an agent'. Find the 'HTTP/HTTPS connection' option and then click on 'Check HTTP service' beside Parameter rule set: Scroll down to the bottom and click 'Create rule... » More

05
Nov
2019

check_mk: Check APT updates

check_mk

On your check_mk install under the WATO menu navigate to 'Monitoring Agents' find and click on the link for 'Check for APT updates (Debian, Ubuntu)'. This is the check plugin to add to the server so copy that code. Copy the contents of that check... » More

04
Nov
2019

ThingsBoard API: Get Auth Token

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The auth token will be required for future API requests. I did the following using the Insomnia REST client: As a curl command that would be: curl -X POST --header 'Content-Type: application/json' --header 'Accept: application/json' -d... » More
29
Oct
2019

Blink Hard Disk Light on Dell

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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... » More

26
Oct
2019

check_mk: Emails Not Sent

check_mk

On a CentOS 7 server with postifx already installed and working I found the emails from check_mk / OMD were not being sent. I needed a symlink for sendmail: ln -s /usr/lib/sendmail.postfix /usr/lib/sendmail Test with su - omduserecho... » More

24
Oct
2019

check_mk: monitor that a process exists

check_mk

WATO > Manual Checks and click on "State and Count of Processes" Add the description, check-type, process name and process matching and set the levels for the number of these processes that are expected: