Migrating drive to new system, internet is not up
ip addr grab interface name
sudo ip link set <interface_name> up
need to update host name in router device list:
sudo dhclient -r && sudo dhclient
Also need to change the netplan in /etc/netplan/00-installer-config.yaml
Turn off monitor on All-in-One system
sudo nano /etc/default/grub
edit line:
GRUB_CMDLINE_LINUX_DEFAULT="consoleblank=60"
save, close, reload grub with sudo update-grub
Accidentally joined a node incorrectly
(Don’t do this if you can avoid it lol)
Drain the Node
kubectl drain --ignore-daemonsets <hostname>
Remove the node from the cluster
kubectl delete node <hostname>
Reset the node configuration (perform on the node itself)
sudo kubeadm reset
Clean up Remaining Kubernetes Artifacts:
rm -rf ~/.kube/
rm -rf /etc/cni/net.d
rm -rf /etc/kubernetes/
rm -rf /var/lib/etcd # Might not need to perform
rm -rf /var/lib/kubelet # Might not need to perform
Rejoin the Node as a worker:
kubeadm join k8scp:6443 --token <token> /
--discovery-token-ca-cert-hash sha256:<token sha256 hash> /
--certificate-key <certificate key> | tee kubeadm-join.out
This can be used in less secure environments to skip the has process
--discovery-token-unsafe-skip-ca-verification
Create new join command with:
kubeadm token create --print-join-command
raspberry pi resets ssh and hosts files on restart
sudo nano /etc/cloud/cloud.cfg
cloud_init_modules:
- migrator
- seed_random
- bootcmd
- write_files
- growpart
- resizefs
- disk_setup
- mounts
- set_hostname
- update_hostname
# - update_etc_hosts
- ca_certs
- rsyslog
- users_groups
# - ssh
Can’t Delete a namespace (???)
Likely a resource with “finalizers” on it in the way find all resource types in the cluster
kubectl api-resources --verbs=list --namespaced=true
ChatGPT suggests automating the next part:
for resource in $(kubectl api-resources --verbs=list --namespaced=true -o name); do
echo "Resource: $resource"
kubectl get $resource -n <namespace>
done
Check each resource within the namespace, if it exists, use kubectl edit to remove the finalizers.
Local Fileserver for uploading plugins/mods to Minecraft
Make sure Python is installed and up to date
python --version
Navigate to the directory:
cd C:\path\to\files
Start the http server:
python -m http.server 8000
Verify the local server: Go to http://localhost:8000
Downloads can now be received at:
http://<Host IP>:8000/<filename>
Just use LoadBalancer IP and port for routing.
Diagnosing ARP issues with MetalLB
From Node
sudo tcpdump -i <interface> host <external-ip> and port <port number>
Use to check that requests are being received on the specific port.
From Windows Machine
arp inet_addr <ip address> sends an ARP request to a specific address
arp -a Shows the full list of ARP addresses
arp -d Requires elevation, clears the ARP table