danpawlik

#!/bin/sh
# bridger-roam-cleanup: removes stale bridger TC flower rules when
# a WiFi client roams between bands (e.g. 5GHz <-> 6GHz).
#
# Bridger creates TC flower rules with skip_sw (hardware-only) to
# accelerate bridge forwarding. When a client roams, bridger sometimes
# leaves stale rules pointing to the old WiFi interface, causing the
# PPE to redirect download traffic to the wrong radio (1 Mbit symptom).

### START THAT SCRIPT USING /etc/rc.local

danpawlik

[   10.137543] input: Dell Computer Corp Dell Universal Receiver System Control as /devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1.4/3-1.4.4/3-1.4.4.1/3-1.4.4.1.2/3-1.4.4.1.2:1.1/0003:413C:2514.0005/input/input16
[   10.137842] hid-generic 0003:413C:2514.0005: input,hidraw4: USB HID v1.11 Mouse [Dell Computer Corp Dell Universal Receiver] on usb-0000:00:14.0-1.4.4.1.2/input1
[   10.139497] hid-generic 0003:413C:2514.0006: hiddev98,hidraw5: USB HID v1.11 Device [Dell Computer Corp Dell Universal Receiver] on usb-0000:00:14.0-1.4.4.1.2/input2
[   13.468861] EXT4-fs (dm-0): orphan cleanup on readonly fs
[   13.469033] EXT4-fs (dm-0): mounted filesystem d9db6e39-e862-4472-bc3e-07760544c75e ro with ordered data mode. Quota mode: none.
[   13.581056] typec port2: bound usb3-port2 (ops connector_ops)
[   13.581064] typec port2: bound usb3-port5 (ops connector_ops)
[   13.581067] typec port2: bound usb3-port7 (ops connector_ops)
[   13.581069] typec port2: bound usb3-port8 (ops connector_ops)
[   13.581071] typec port2

danpawlik

#!/bin/bash

# Error: Failed to download metadata for repo 'baseos': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried

# on Centos 9 stream, just do:

sudo sed -i 's@metalink=https://mirrors.centos.org/metalink?repo=centos-baseos-$stream&arch=$basearch&protocol=https,http@baseurl=http://mirror.stream.centos.org/9-stream/BaseOS/$basearch/os/@g' /etc/yum.repos.d/centos.repo

sudo sed -i 's@metalink=https://mirrors.centos.org/metalink?repo=centos-appstream-$stream&arch=$basearch&protocol=https,http@baseurl=http://mirror.stream.centos.org/9-stream/AppStream/$basearch/os/@g' /etc/yum.repos.d/centos.repo

danpawlik

---
- name: Set system-wide IOPS limitation via cgroups v2
  hosts: all
  become: true
  vars:
    main_blk_name: /dev/vda
    iops_limit: 10000
    rw_total_limit: 104857600  # 100mb in bytes
  tasks:
    - name: Get block device major:minor

danpawlik

#!/bin/bash

CURRENT_DIR=$(pwd)
# for 6.12 -> main, for 6.6 -> openwrt-24.10
# OPENWRT_BRANCH=openwrt-24.10
# If main, than: d6397aaf69fbb442f913b2853cac2991962ef905
OPENWRT_BRANCH=main
OPENWRT_DIR=$(pwd)/openwrt-mediatek
MEDIATEK_FEED_BRANCH=master

danpawlik

# check file system which should be extended
virt-filesystems --long -h --all  -a CentOS-Stream-GenericCloud-x86_64-10-20241204.0.x86_64.qcow2

# create new empty disk with desired size
qemu-img create -f qcow2 centos-stream-10.qcow2 100G  ## Optionally add: -o preallocation=metadata

# expand root partition
virt-resize --expand /dev/sda3 CentOS-Stream-GenericCloud-x86_64-10-20241204.0.x86_64.qcow2 centos-stream-10.qcow2

# Modify image

danpawlik

#!/bin/bash

MAIN_DIR=~/monitoring
ROUTER_NODE_EXPORTER_ADDRESS="192.168.88.1:9100"

if ! [ -d "$MAIN_DIR" ]; then
  mkdir -p $MAIN_DIR
fi

# NOTE: https://grafana.com/blog/2021/02/09/how-i-monitor-my-openwrt-router-with-grafana-cloud-and-prometheus/

danpawlik

opkg update
opkg install dnsproxy

# Ensure, that the NTP server can work without DNS
uci del system.ntp.server
uci add_list system.ntp.server='194.177.4.1'    # 0.openwrt.pool.ntp.org
uci add_list system.ntp.server='213.222.217.11' # 1.openwrt.pool.ntp.org
uci add_list system.ntp.server='80.50.102.114'  # 2.openwrt.pool.ntp.org
uci add_list system.ntp.server='193.219.28.60'  # 3.openwrt.pool.ntp.org
uci commit system

danpawlik

### Create file called machine-config-daemon-force in /run ###
ssh core@hostname.local sudo touch /run/machine-config-daemon-force

### Edit node annotations ###
oc edit node <node-name>

### Check Annotations, change like below sample ###
 machineconfiguration.openshift.io/currentConfig: rendered-worker-ab4a1e7216bf3da2a5203f09c871b456
 machineconfiguration.openshift.io/desiredConfig: rendered-worker-ab4a1e7216bf3da2a5203f09c871b456
 machineconfiguration.openshift.io/reason: ""

danpawlik

#!/bin/bash

OPERATOR_SDK="v1.34.2"
OLM="0.27.0"

# Grant more permissions
oc patch scc restricted --type=merge -p '{"runAsUser": {"type": "RunAsAny"}}'
oc patch scc restricted-v2 --type=merge -p '{"runAsUser": {"type": "RunAsAny"}}'
# optional
oc adm policy add-scc-to-user privileged system:serviceaccount:olm:default