JanKoppe

alias accio=wget
alias avadaKedavra='rm -f'
alias imperio=sudo
alias priorIncantato='echo `history |tail -n2 |head -n1` | sed "s/[0-9]* //"'
alias stupefy='sleep 5'
alias wingardiumLeviosa=mv

alias sonorus='set -v'
alias quietus='set +v'

JanKoppe

Keybase proof

I hereby claim:

• I am JanKoppe on github.
• I am jankoppe (https://keybase.io/jankoppe) on keybase.
• I have a public key whose fingerprint is 7521 FAB1 B9A0 1B22 1DEB 6CE7 BE93 5B07 35A2 129B

To claim this, I am signing this object:

JanKoppe

Host 172.17.8.*
   StrictHostKeyChecking no
   UserKnownHostsFile=/dev/null

JanKoppe

https://github.com/docker/docker/issues/30966

mostolog commented 19 days ago
As you said, swarm nodes get host's hostname as swarm node name (internally). That's perfectly correct for me.

After deploying some services with default setting, ps shows something like:

37bbf2b56dbf serviceBar.1.ngneetjtxwhm2eijfs1gvt60t
a90e2d59cd77 serviceBar.2.d4lf8h3gqj9e7gyhfi3lgrtdt
ed6d150d7c84 serviceBar.3.iz85bp0sc5t6e3b15w6gtteus

JanKoppe

Grafana Cat Panel

Recent studies have shown that a steady flow of cute kitten pictures can increase work productivity by up to 100% and boost general morale. Therefore every dashboard should provide a cat panel.

Paste this code in a "Text" Panel with html mode and enjoy.

JanKoppe

/*
             LUFA Library
     Copyright (C) Dean Camera, 2012.

  dean [at] fourwalledcubicle [dot] com
           www.lufa-lib.org
*/

/*
  Copyright 2012  Dean Camera (dean [at] fourwalledcubicle [dot] com)

JanKoppe

python manage.py shell

JanKoppe

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

Results

JanKoppe

Running a Django app with gunicorn in a Docker container gets a bit tricky, when you try to expose Prometheus metrics (with e.g. https://github.com/korfuri/django-prometheus).

Every worker thread in gunicorn will be an entirely separate process, all RRD behind a single port. So, if you are running more than one worker thread (which you most likely do and should) you will need to let the workers each listen on a dedicated port, so your metrics will not get confused. You could try to add additional labels, but that still would come with a lot of problems. Running on a range of ports is supported quite well with korfuri/django-prometheus, as described here: https://github.com/korfuri/django-prometheus/blob/master/documentation/exports.md#exporting-metrics-in-a-wsgi-application-with-multiple-processes

This will be a bit uncomfortable though, especially if your app is hidden behind an ingress reverse proxy and you do not want to punch lots of holes into your firewall config, or create lots and lots of vhosts.

JanKoppe

#!/bin/bash

# Reminds you in xx minutes with notify-send, using at/atd

MINUTES=${1}
MESSAGE=${2:-reminder}

at now + "${MINUTES}" minutes << EOF
notify-send -c reminder -u critical 'Reminder from ${MINUTES} minutes ago' '${MESSAGE}'
EOF