The Homelab Postmortem

Sep 17

Podman's Docker-compatible API resets a container's restart policy to 'no' on any update that omits it

#podman #docker #linux #devops

1

7 min read

The Homelab Postmortem

Sep 17

One failed WPA handshake and a headless Raspberry Pi on Trixie stays off WiFi until someone types a command

#raspberrypi #linux #networking #debugging

1

8 min read

The Homelab Postmortem

Sep 16

llama.cpp reads past your pos array on embedding batches for M-RoPE models, and the logits change with the heap

#llm #ai #cpp #debugging

1

10 min read

The Homelab Postmortem

Sep 16

Ollama's gemma4 renderer silently drops tool parameters named type or description, and the model invents a value

#ollama #llm #ai #debugging

2

7 min read

The Homelab Postmortem

Sep 15

llama.cpp reads past its own pos buffer for M-RoPE embeddings, and nothing reports it

#llm #ai #cpp #debugging

6 min read

The Homelab Postmortem

Sep 14

Ollama's Responses API accepts previous_response_id, returns 200, and forgets the whole conversation

#ollama #llm #ai #devops

4

6 min read

The Homelab Postmortem

Sep 12

docker logs stops at a NUL byte, exits 0, and --since says nothing happened

#docker #devops #linux #sysadmin

1

7 min read

The Homelab Postmortem

Sep 11

llama-server ignores the response_format its own README shows, and returns 200

#llm #ai #devops #python

1

6 min read

The Homelab Postmortem

Sep 11

cloud-init never reads the instance-id Raspberry Pi OS sets, so your second user-data is skipped

#raspberrypi #linux #devops #sysadmin

1

6 min read

The Homelab Postmortem

Sep 7

vLLM accepts a LoRA it will never apply, and answers with the base model instead

#ai #vllm #llm #devops

6 min read

The Homelab Postmortem

Sep 6

An Ollama tag that pulls and runs and has no working code in it. The same model at the same quantisation, elsewhere, is fine.

#ai #ollama #llm #devops

8 min read

The Homelab Postmortem

Sep 5

llama-cli reports a commit hash that is not in llama.cpp. It belongs to whatever repository you unpacked the source inside.

#cmake #ai #linux #devops

7 min read

The Homelab Postmortem

Aug 31

llama-cli prints the error and exits 0. The same binary exits 1 when the model is missing.

#ai #linux #devops #bash

4 min read

The Homelab Postmortem

Aug 29

The same ssh_import_id works in one cloud-init file and does nothing in the next. The difference is one letter.

#raspberrypi #linux #devops #sysadmin

8 min read

The Homelab Postmortem

Aug 27

iptables says your kernel needs upgrading. Upgrading the kernel is what broke it.

#raspberrypi #linux #networking #docker

6 min read

The Homelab Postmortem

Aug 26

tar backed up your Pi's WiFi config and exited 0. The archive holds one empty directory.

#raspberrypi #linux #networking #sysadmin

9 min read

The Homelab Postmortem

Aug 24

Podman publishes the same port and your firewall still holds. Even as root.

#podman #docker #security #linux

6 min read

The Homelab Postmortem

Aug 22

UFW says the port is closed. Docker published it to your whole network anyway.

#docker #security #linux #raspberrypi

5 min read

The Homelab Postmortem

Aug 19

A new NetworkManager property broke a decade of headless WiFi scripts

#raspberrypi #linux #networking #sysadmin

5 min read

The Homelab Postmortem

Aug 19

sysctl -p says it worked. The next reboot disagrees.

#raspberrypi #linux #systemd #sysadmin

6 min read

The Homelab Postmortem

Aug 19

Your Pi accepts every memory limit you set and enforces none of them

#raspberrypi #docker #linux #containers

6 min read

The Homelab Postmortem

Aug 19

Your Pi's 2 GB swap file isn't swap, and no swap command will tell you that

#raspberrypi #linux #sysadmin #debugging

6 min read

The Homelab Postmortem

Aug 18

Stripe retries a failed webhook for three days, and I found out by getting the same email three times

#raspberrypi #cloudflare #stripe #webhooks

4 min read

The Homelab Postmortem

Aug 18

Raspberry Pi OS Trixie throws away your logs on reboot, and /var/log/journal exists anyway to reassure you it doesn't

5 min read

The Homelab Postmortem

Aug 18

Undervoltage doesn’t look like a power problem. It looks like bad Wi-Fi.

#raspberrypi #cloudflare #stripe #webhooks

4 min read

The Homelab Postmortem

Aug 18

Your Discord bot is ignoring you, and the status output is lying about why

#raspberrypi #cloudflare #stripe #webhooks

4 min read

The Homelab Postmortem

Aug 18

The rpi-clone PARTUUID trap: why your Pi 4B silently refuses to boot from a cloned SSD

#raspberrypi #cloudflare #stripe #webhooks

5 min read

DEV Community

Badges

Writing Debut

Podman's Docker-compatible API resets a container's restart policy to 'no' on any update that omits it

One failed WPA handshake and a headless Raspberry Pi on Trixie stays off WiFi until someone types a command

llama.cpp reads past your pos array on embedding batches for M-RoPE models, and the logits change with the heap

Ollama's gemma4 renderer silently drops tool parameters named type or description, and the model invents a value

llama.cpp reads past its own pos buffer for M-RoPE embeddings, and nothing reports it

Ollama's Responses API accepts previous_response_id, returns 200, and forgets the whole conversation

docker logs stops at a NUL byte, exits 0, and --since says nothing happened

llama-server ignores the response_format its own README shows, and returns 200

cloud-init never reads the instance-id Raspberry Pi OS sets, so your second user-data is skipped

vLLM accepts a LoRA it will never apply, and answers with the base model instead

An Ollama tag that pulls and runs and has no working code in it. The same model at the same quantisation, elsewhere, is fine.

llama-cli reports a commit hash that is not in llama.cpp. It belongs to whatever repository you unpacked the source inside.

llama-cli prints the error and exits 0. The same binary exits 1 when the model is missing.

The same ssh_import_id works in one cloud-init file and does nothing in the next. The difference is one letter.

iptables says your kernel needs upgrading. Upgrading the kernel is what broke it.

tar backed up your Pi's WiFi config and exited 0. The archive holds one empty directory.

Podman publishes the same port and your firewall still holds. Even as root.

UFW says the port is closed. Docker published it to your whole network anyway.

A new NetworkManager property broke a decade of headless WiFi scripts

sysctl -p says it worked. The next reboot disagrees.

Your Pi accepts every memory limit you set and enforces none of them

Your Pi's 2 GB swap file isn't swap, and no swap command will tell you that

Stripe retries a failed webhook for three days, and I found out by getting the same email three times

Raspberry Pi OS Trixie throws away your logs on reboot, and /var/log/journal exists anyway to reassure you it doesn't

Undervoltage doesn’t look like a power problem. It looks like bad Wi-Fi.

Your Discord bot is ignoring you, and the status output is lying about why

The rpi-clone PARTUUID trap: why your Pi 4B silently refuses to boot from a cloned SSD