That advertisement would be interpreted as Node C’s advertisement.

The plan is to treat public keys as node’s identity and trust mechanism similar to OpenPGP (e.g. include any node key signed by a master key as a cluster member)

Right now, none of the encryption part is done and it is not a priority right now. I need to first implement transitive node detection, actually forward packets between nodes, some way to store and manage routes, and then trust and encryption mechanisms before I’d dare to test this stuff on a real network.

The UI is desktop only for now, I’ll make the mobile UI some day.

Technically, containers always run in Linux. (Even on windows/OS X; on those platforms docker runs a lightweight Linux VM that then runs your containers.)

And I wasn’t even using Docker.

How I lost a Postgres database:

1. Installed Postgres container without configuring a volume
2. Made a mental note that I need to configure a volume
3. After a few days of usage, restarted the container to configure the volume
4. …
5. Acceptance

You are not alone.

Just did some basic testing on broadcast addresses using socat, broadcast is not working at all with /32 addresses. With /24 addresses, broadcast only reaches nodes that share a subnet. Nodes that don’t share the subnet aren’t reachable by broadcast even when they’re reachable via unicast.

Edit1: Did more testing, it seems like broadcast traffic ignores routing tables.

On 192.168.0.2, I am running socat -u udp-recv:8000,reuseaddr - to print UDP messages.

Case 1: add 192.168.0.1/24

# ip addr add 192.168.0.1/24 dev eth0
# # Testing unicast
# socat - udp-sendto:192.168.0.2:8000 <<< "Message"
# # Worked
# socat - udp-sendto:192.168.0.255:8000,broadcast <<< "Message"
# # Worked

Case 2: Same as above but delete 192.168.0.0/24 route

# ip addr add 192.168.0.1/24 dev eth0
# ip route del 192.168.0.0/24 dev eth0
# # Testing unicast
# socat - udp-sendto:192.168.0.2:8000 <<< "Message"
2024/02/13 22:00:23 socat[90844] E sendto(5, 0x5d3cdaa2b000, 8, 0, AF=2 192.168.0.2:8000, 16): Network is unreachable
# # Testing broadcast
# socat - udp-sendto:192.168.0.255:8000,broadcast <<< "Message"
# # Worked

Here is a trick that has been tried and tested over the years: Install another distro, and use that to install Arch. This way, you can rely on an already working linux distro till your Arch install works the way you want.

Hmm… Maybe I should adjust my priorities.

I was confused for a moment, because intuitively a CPU fan would look in the same direction as it blows air, so it should look into the heatsink. The fan looking away from the heatsink seems weird to me.

Or the owner installed the fan in the wrong direction.

TPM stores the encryption key against secure boot. That way, if attacker disables/alters secure boot then TPM won’t unseal the key. I use clevis to decrypt the drive.

Thank you… I had to learn kubernetes for work and it was around 2 weeks of time investment and then I figured out I could use it to fix my docker-compose pains at home.

If you run a lot of services, I can attest that kubernetes is definitely not overkill, it is a good tool for managing complexity. I have 8 services on a single-node kubernetes and I like how I can manage configuration for each service independent of each other and also the underlying infrastructure.

don’t create one network with Gitlab, Redmine and OpenLDAP - do two, one with Gitlab and OpenLDAP, and one with Redmine and OpenLDAP.

This was the setup I had, but now I am already using kubernetes with no intention to switch back.

I was writing my own compose files, but see my response to a sibling comment for the issue I had.

If one service needs to connect to another service then I have to add a shared network between them. In that case, the services essentially shared a common namespace regarding DNS. DNS resolution would routinely leak from one service to another and cause outages, e.g if I connect Gitlab container and Redmine container with OpenLDAP container then sometimes Redmine’s nginx container would access Gitlab container instead of Redmine container and Gitlab container would access Redmine’s DB instead of its own DB.

I maintained some workarounds, like starting Gitlab after starting Redmine would work fine but starting them other way round would have this issue. But switching to Kubernetes and replacing the cross-service connections with network policies solved the issue for me.

As someone who is operating kubernetes for 2 years in my home server, using containers is much more maintainable compared to installing everything directly on the server.

I tried using docker-compose first to manage my services. It works well for 2-3 services, but as the number of services grew they started to interfere with each other, at that point I switched to kubernetes.

All these are just silly stereotypes that almost nobody fits into.

I am glad that atleast it ends there. It could have been worse.

I just uploaded to Github: https://github.com/akashrawal/nsd4k

I only made it for myself, so expect very rough edges in there.

I run a crude automation on top of OpenSSL CA. It checks for certain labels attached to kubernetes services. Based on that it creates kubernetes secrets containing the generated certificates.

It might be a failing fan. I have an Intel nuc whose fan started sounding like an air raid siren, so I took the fan out, drilled a hole into its bearing and added coconut oil into it. It is working fine till this date, but buying a new fan is probably better.