Table des matières
- 2026:
- 2025:
4 billet(s) pour septembre 2026
| Notes HTTP Strict Transport Security - HSTS | 2026/09/18 11:04 | Jean-Baptiste |
| Notes GNU Linux GPU carte graphiques | 2026/09/08 15:49 | Jean-Baptiste |
| Notes GNU Linux graphique | 2026/09/08 15:42 | Jean-Baptiste |
| Notes urlencoding - passer des mots de passe en HTTPS | 2026/09/03 17:58 | Jean-Baptiste |
Images conteneurs flatten - réduire la taille d'une image
Voir aussi :
- regctl / regclient
Avec crane
Installation
Via asdf ou
tar xvf go-containerregistry.tar.gz
LICENSE
README.md
crane
gcrane
krane
Utilisation
Comme ça ne fonctionne pas avec tous les types de registries ne fonctionne pas, pour notre besoin nous allons en créer un basé sur docker.io/registry
podman run -d -p 5000:5000 --name registry docker.io/registry
Récupération de l'image
crane auth login artifact.acme.local crane copy artifact.acme.local/dev-plop/app1:main localhost:5000/app1:main # crane copy artifact.acme.local/dev-plop/app1:main localhost:5000/app1:main --platform linux/amd64
$ crane flatten localhost:5000/app1:main -t localhost:5000/app1:main-flat 2026/07/31 18:26:01 pushed blob: sha256:ed9d23f3b49db213c07a6daeaf7a76405361dc92e24451068d6859d438dbd4ff 2026/07/31 18:26:01 existing blob: sha256:ed9d23f3b49db213c07a6daeaf7a76405361dc92e24451068d6859d438dbd4ff 2026/07/31 18:26:01 pushed blob: sha256:209899dc89cf25b900a57f1a86d9db824f1f9399eab4a1ed53d3e6d18a5420e7 2026/07/31 18:26:01 localhost:5000/app1:main-flat: digest: sha256:63a460ab7df5fd87f10d07fbff9cc662bd61d71e86c7f52521ca3a80587831b5 size: 431 localhost:5000/app1@sha256:63a460ab7df5fd87f10d07fbff9cc662bd61d71e86c7f52521ca3a80587831b5
Récupération de l'image aplanie en local
podman pull --tls-verify=false localhost:5000/app1:main-flat
Comparaison de la taille
$ podman images REPOSITORY TAG IMAGE ID CREATED SIZE localhost:5000/app1 main-flat 209899dc89cf 2 hours ago 2.53 GB artifact.acme.local/dev-plop/app1 main c5cfb851b087 11 hours ago 5.04 GB
Contre DNS
Source : https://freenet.org/about/faq/#does-freenet-have-decentralized-domain-names-or-dns
Does Freenet have decentralized domain names or DNS?
Not currently, and mostly on purpose. Domain names do three different jobs: identification, human-readable naming, and discovery. We think DNS is the wrong fit for all three on a decentralized network.
- Identification: Freenet identifies content and applications by contract hashes, which are content-addressed keys. They’re fully decentralized and cryptographically verifiable, but not human-friendly.
- Human-readable naming: This is the problem captured by Zooko’s triangle: a name can be at most two of human-meaningful, secure, and decentralized. DNS gets memorability by being centralized. Freenet prefers local, personal naming instead: memorable nicknames each user keeps for the identities they care about, like the contacts list on your phone (a “petname” system). Because the names are personal rather than global, there’s no central registry to control and no race to squat every good name.
- Discovery: “Find the thing I want” is really a search problem, not a naming one, and search and recommendation handle it better than a global namespace can. That’s what we’re designing in Atlas, a decentralized discovery layer that’s still at the design stage.
So Freenet has no direct equivalent of decentralized domain names, because we don’t think DNS is the right tool for either identification or discovery.
Limiter la consommation de la RAM d'une application avec les cgroups slices
Source : https://unix.stackexchange.com/questions/499485/how-do-i-use-swap-space-for-emergencies-only
/home/jean/.config/systemd/user/mozilla.slice
[Unit] Description=Slice for Mozilla apps Before=slices.target [Slice] MemoryAccounting=yes MemoryHigh=5G MemoryMax=6G
systemd-run --user --slice mozilla.slice --scope -- /usr/bin/firefox &
Procédure simple augmentation de la SWAP
Prérequis :
- Les applications métiers doivent être arrêtées
- Les commandes ci-dessous sont à faire en root
# Connaître l’état actuel de la RAM et du SWAP free -m # Localiser la partition SWAP grep swap /etc/fstab # Désactiver le SWAP swapoff -a # Redimensionner la partition SWAP lvresize -L 4G /dev/vgsys01/lvswap # Créer la zone d’échange SWAP mkswap /dev/vgsys01/lvswap # Activer le SWAP swapon -a # Vérifier free -m