@isotopp@chaos.social
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isotopp

@[email protected]

Kristian Köhntopp.
German, living and working in the Netherlands.
1x engineer (https://1x.engineer).
I am the brute squad.

This profile is from a federated server and may be incomplete. Browse more on the original instance.

isotopp, to random German
@isotopp@chaos.social avatar

Eine Bekannte schreibt:

"Ich wollte mal die E-Scooter ausprobieren und habe mich mit meiner Handynummer registriert, woraufhin mich die App fröhlich mit „Hallo Kevin“ begrüßte. Sieh mal an, hieß der Vorbesitzer der Nummer also Kevin."

Wenn Ihr Systeme baut, die Telefonnummern als ID verwenden solltet Ihr das im Hinterkopf behalten.

isotopp,
@isotopp@chaos.social avatar

@energisch_

Du hast lange nicht versucht, irgendeinen Messenger zu verwenden, ja? Selbst Desktop-Messenger nehmen inzwischen Deine Handynummer als Loginnamen, Alternativen sind nicht verfügbar.

@Hasecaesar @newdefined

isotopp,
@isotopp@chaos.social avatar

@energisch_

https://maps.app.goo.gl/Z7rBGvFRneNvUYuU9

@Hasecaesar @newdefined

isotopp,
@isotopp@chaos.social avatar

@energisch_

Wenn WhatsApp down ist, werden die gesamten Niederlande vorübergehend geschlossen. Das gesamte Land basiert darauf, daß man Menschen een appje sture kann.

@Hasecaesar @newdefined

isotopp, to random German
@isotopp@chaos.social avatar

"In Amsterdam, a Google self-driving car would park itself after a few minutes and start crying."

https://twitter.com/joophazenberg/status/848827692556451840

isotopp, to random
@isotopp@chaos.social avatar

This is about the third story I hear about an instance losing all their data because of a CI/CD mistake.

https://firefish.social/notes/9iqefgi8rzfksnqc

Hugops, but also the usual grizzled old sysadmin advice:

  1. Never say backup. Always say restore. This changes your mind.

A backup is a cost center. It has no value, it has only cost. Only a restore has a proven value, and comes with knowledge:

  • You know you actually can restore, the backup was complete and does connect.
    …
isotopp,
@isotopp@chaos.social avatar
  • You know how long the restore took, so you know the time to restore when asked. Not an estimate. The actual time.
  • You know the restore procedure.

Restore EVERY backup ALL the time, then throw the recovered instance away. Keep the metrics, keep the backup.

isotopp,
@isotopp@chaos.social avatar
  1. There is no such thing as immutable, statelessness or whatever.

Parts of your setup may be stateless deployments with immutable images. That is, because you collected all state and put it into one or two selected locations.

You can redeploy everything but these selected locations.

If you drop them, if you make a config mistake, these things are gone gone. They cannot be redeployed, unless you have taken measures to do so. See 1.

isotopp,
@isotopp@chaos.social avatar
  1. Devops is easy except for the stateful parts.

That is why the storage people and the database people all look down on you hipster devops people and make condescending remarks. 🙂

Yah, ok, they are nicer than you probably think they are, but the DO have a completely different outlook on operations.

Listen and learn. Also, restore test.

isotopp,
@isotopp@chaos.social avatar

Also,

https://argo-cd.readthedocs.io/en/stable/user-guide/sync-options/#no-prune-resources

and

https://kubernetes.io/docs/tasks/administer-cluster/change-pv-reclaim-policy/
Retain, not Delete.

There are people who have taken steps to prevent their CI/CD from messing with EBS volumes, S3 buckets or K8s PVs and there are people who will lose data in the future.

Don't be in the second group.

isotopp, to random German
@isotopp@chaos.social avatar

Früher hatten wir Festplatten. Das ist ein Stapel Glasplatten, die mit Eisenoxid beschichtet sind, gleichmäßig schnell rotieren und auf dem wir mit einem Kamm voller Schreib-Lese-Köpfe Teile magnetisieren oder die Magnetspuren auslesen.

Platten hatten CHS-Adressen für Sektoren, also Cylinder (drinnen, weiter draußen), Head (Scheibe) und Sektor (also welches Stück Scheibe).

Diese CHS-Adressen waren für das Betriebssystem sichtbar und das hat damit optimiert.

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