ognjen011

My Openshift Cheatsheet

List all non openshift/kube namespaces

requires jq CLI

oc get namespaces -o json | jq '[.items[] | select((.metadata.name | startswith("openshift") | not) and (.metadata.name | startswith("kube-") | not) and .metadata.name != "default" and (true)) | .metadata.name ]'

Project Quotes, Limits and Templates

ognjen011

My Openshift Cheatsheet

List all non openshift/kube namespaces

requires jq CLI

oc get namespaces -o json | jq '[.items[] | select((.metadata.name | startswith("openshift") | not) and (.metadata.name | startswith("kube-") | not) and .metadata.name != "default" and (true)) | .metadata.name ]'

Project Quotes, Limits and Templates

ognjen011

Restore access to a unifi controller

When you are unable to login to the unifi controller or forgot admin password, you can restore access using SSH and manipulating mongodb directly.

Warning

Do not uninstall unifi controller - most of the data is not stored in mongodb. In case you thought a mongodb backup would be sufficient, you may have fucked up already, just like me. However I managed to write this "tutorial" for anyone to not run into the same trap.

Apparently this guide no longer works with recent unifi controller versions (starting nov/dec 2022). Since I no longer use unifi hardware in my home system, I can not update the guide myself. In case you've gotten here to recover your data, you're likely doomed. But giving it a try won't hurt anyway, therefore: good luck.

ognjen011

RKE2 Node Cleanup To reset a RKE2 node, run the following commands:

# rke2-(server|agent) related
rke2-killall.sh
rke2-uninstall.sh
# rancher-system-agent related
systemctl stop rancher-system-agent.service
systemctl disable rancher-system-agent.service
rm -f /etc/systemd/system/rancher-system-agent.service

ognjen011

Resize root partition (or how to remove the default /home partition) on CentOS 7 online

This requires you to be able to ssh into the instance using the root user account and that no services be running as users out of /home on the target machine.

The examples are from a default installation with no customation-you NEED to know what you're working with for volumes/partitions to not horribly break things.

By default, CentOS 7 uses XFS for the file system and Logical Volume Manager (LVM), creating 3 partitions: /,/home and

Step 1 - Copy /home Contents

To backup the contents of /home, do the following:

ognjen011

pynetbox examples

Long time network engineer, did some perl a long time ago and am liking python pretty well but the pynetbox documentation is badly lacking IMO. If I were a python wizard I'm sure it would all be obvious but I'm not and it's really frustrating that more example weren't provided.

Many of the following examples were cadged from various places on the interwebs and HAVE NOT BEEN TESTED.

Prereqs

import pynetbox
NETBOX = 'https://netbox.fq.dn/'
nb = pynetbox.api(NETBOX, get_token('nb'))

ognjen011

# Mikrotik RouterOS Script to do proper uplink failover/failback (more reliable than Netwatch).
# Supports both Generic and PPPoE interfaces.
# Policy: read, write, policy, test


### Configuration ###

# Define Names of all Interfaces that will be checked:
:local "interface-names" { "internet-speedy";"internet-biznet" };

ognjen011

v=0.13.0


version=v$v
file=snmp_exporter-$v.linux-amd64
service=snmp_exporter


wget https://github.com/prometheus/snmp_exporter/releases/download/$version/$file.tar.gz \
  -O /tmp/$file.tar.gz