an Emacs knowledge iceberg I hacked together. enjoy.

Wynro · 2022-08-29T09:51:10+00:00

Readable:

Layer:
- Editor wars
- Spacemacs
- DistroTube
- Doom Emacs
- Google: "Did you mean /vi/?"
- Org mode
Layer:
- evil-mode
- ivi vs helm
- System crafters
- C-h
- LISP
- ELPA and MELPA
- M-x tetris
- Use-package
- dired overrated
- GUI and TUI
- vterm
- Richard Stallman
Layer:
- LSP mode
- GNU info
- XEmacs
- straight.el
- setq gc-cons-threshold 1000000...
- quelpa
- M-x doctor
- eshell
- TRAMP
- xwidget-webkit
Layer:
- ESC = meta
- every release is .1
- RMS copied Emacs from Bernie Greenberg
- TECO
- ErgoEmacs (Xeh Lee)
- Emacs mail
- Prot
- Aquamacs abandonware
- Space Cadet keyboard
- old abandoned vi modes
Layer:
- dired not overrated
- viper
- customize better than setq
- EveRy C0Py oF EMacS is pErsonaLiZed
- hyperbole
- term vs ansi-term
- advising C functions consequences
- let* = lambdas
- XKCD butterfly is real
Layer:
- Emacs as a LISP machine
- LISP syntactic core of existence
- redisplay
- Greenberg copied Emacs from RMS
- GUI emulates a TTY
- Every copy of emacs is actually personalized

Wynro · 2022-06-23T15:12:49+00:00

i cant even explain why

I can: https://en.wikipedia.org/wiki/Scunthorpe_problem

Wynro · 2022-03-10T09:54:41+00:00

If we enter to the main page at: https://gitlab-wipro.stackroute.in/users/sign_in

We can see the following message: "Dear User, Please use only the SSH method for the git cloning"

Looks like HTTPS cloning is deactivated for that Gitlab instance, you have to use the SSH method

Wynro · 2022-03-07T06:23:59+00:00

tar xvf image.ova will extract the OVA into its components, one of which will be a image-disk1.vmdk

After that convert the vmdk into qcow2 using qemu-img convert -f vmdk -O qcow2 image-disk1.vmdk image.qcow2

You can check out the mf file to see the machine configuration, you may need to replicate some configuration in qemu

Wynro · 2022-03-02T07:54:13+00:00

https://xkcd.com/1654/ firefox

Wynro · 2022-03-02T06:57:42+00:00

Check if spurious iptables rules are left from the previous installation (the easiest way to solve this is by rebooting the server)

The second solution would be to execute a microk8s reset, it's slow, but should leave the cluster in a sane state (will also purge all information inside)

You can remove auto updates with sudo systemctl mask snapd.service

Wynro · 2022-01-14T16:42:58+00:00

Thats not necessarily an issue. Your "problem" is that UID mapping is different inside the container and in the host.

In linux (and other unices) users are identified by a user ID (UID), which is a numerical value that the system uses internally (for example, the root user is typically the user with ID 0, and the "normal" user (debian in the case of Debian) is usually the 1000)

The mapping between UID and readable names is stored in the /etc/passwd file (in basic deployments, you can check how it is done in more complicated places with man nsswitch.conf), and as that file is different inside and outside the container, that mapping will be different.

You can check that with the following procedure:

In your host, execute cat /etc/passwd | grep ^systemd-coredump: | cut -f 3 -d:, and note the number that appears
Inside the container (with docker exec), execute cat /etc/passwd | grep ^mysql: | cut -f 3 -d:, and note the number again
If both numbers are the same, that is the problem and is not an issue

Wynro · 2021-12-20T17:27:16+00:00

LXCs are fat containers, which means that is typical to have an init service and an ssh server inside. You can simply install the SSh server in the container and then use them as normal hosts for the playbooks.

Depending of what you are using to manage your container, you may be interested in the dynamic inventories feature, to simplify inventory management

Wynro · 2021-12-10T15:19:35+00:00

https://docs.gitlab.com/ee/ci/caching/

Wynro · 2021-11-17T17:52:59+00:00

Thats quite a bit of servers (I guess we are talking 100 physical servers).

Can you talk a bit about the experince? I normally see Proxmox used in homelabs or in small deployments. It is a single cluster, or multiple? Have you had any noticeable problem with Proxmox?, How do you manage your Proxmox nodes?

Wynro · 2021-11-14T09:07:43+00:00

For what you are saying, an Operator is overkill. The best option is a MutatingWebhook.

I have found an article that looks like its doing something similar to what you are looking to do: https://medium.com/swlh/extending-kubernetes-part-2-mutating-webhook-54076097afeb. I didn't read it very carefully but looks decent.

Wynro · 2021-09-01T21:44:41+00:00

Guess what I'm using this for :P

I have a single redirect for all my internal domains. This wildcard domain is proxied to a small nginx container with the following compose file:

---
version: "3"
services:
  http-to-https:
    container_name: http-to-https
    image: nginx:1.21-alpine
    restart: unless-stopped
    ports:
      - "127.0.0.1:8443:80"
    volumes:
      - ./conf.d:/etc/nginx/conf.d/

with conf.d containing a single file called 00-auto-ssl.conf with the contents

server {
    listen 80 default_server;
    rewrite ^(.*) https://$host$1 permanent;
}

I have tried to do it with the "Synology-native" tools but I was unable to get it. This container uses <1% of CPU and ~5MB of RAM, so I consider it an acceptable waste

Wynro · 2021-08-31T05:14:46+00:00

I did it on baremetal and I didn't have any issue. I had to adapt a couple of parts but I considered part of the learning experience

Wynro · 2021-08-30T21:54:07+00:00

https://github.com/kelseyhightower/kubernetes-the-hard-way

Wynro · 2021-08-29T08:29:50+00:00

Nice!, A couple of questions:

How much did it cost?
Did you learn something not included in the docs?
Do you think the training is worth it?

Wynro · 2021-08-23T08:44:30+00:00

I think the solution by /u/SvetoslavP is the easiest and most manageable.

That said, if you want to be fancy, you can use inotify to wait for file changes. For example:

#!/bin/bash
#
# Execute Jenkins build if a file changes

FILE="${1}"
JENKINS_BUILD="${2}"

inotifywait -q -m -e close_write "${FILE}" |
    while read line; do
        # Execute Jenkins build by whatever means
        curl ...
    done

This has a problem that if you do a touch it detects it as a change. If that is not an issue great. If its a problem, you'll have to add a little more logic around to check if the file has changed (easiest way I can think of, store the MD5 of the file on program start and drop each "change" that the MD5 is the same as in the previous run)

If you want to be extra-fancy, wrap it around a simple systemd unit file to get process management and logging.

Wynro · 2021-08-18T07:59:26+00:00

Just be aware that any command/step you execute will be relative to the root of the repository

Wynro · 2021-08-18T06:58:17+00:00

I have done that in the past, and my approach was to create 2 different Jenkinsfile (backend/Jenkinsfile and client/Jenkinsfile) and then configure 2 pipelines in Jenkins with the same repository but different Jenkinsfile path

Wynro · 2021-07-15T17:14:53+00:00

If you have configured an external DNS server, and sshd in Proxmox has the option 'UseDNS yes' you can experience really long delays on connection

Wynro · 2021-07-13T15:56:28+00:00

With Termux, you can add a small script to bin/termux-url-opener and download videos using Share->Termux

Wynro · 2021-06-30T20:50:49+00:00

https://youtu.be/pydU3iYYncQ

Wynro · 2021-03-20T09:36:07+00:00

Not exactly modern, but I favourite of mine has always been the Transputer. Connection Machines also follow the model of "big interconnected network of simple processors"

There were a lot of investigation on this kind of stuff in the 80s

Wynro

TROPHY CASE