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Generic HA Architecture - App servers + PostgreSQL Patroni cluster Keepalived + HAproxy used as Load Balancers Key components: HAproxy - TCP/HTTP Load Balancer Keepalived - Virtual IP for HAproxy Patroni - HA template for PostgreSQL database (cluster with streaming replication) etcd - Distributed Configuration Store for Patroni Architecture diagram:
Install libheif-tools sudo dnf install -y libheif-tools check HEIF decoders (HEIC and AVIF) heif-convert --list-decoders For Nautilus thumbnails regenerating restart Nautilus and remove thumbnails cache. nautilus -q rm ~/.cache/thumbnails
By default in GNOME 45 option "Suspend when lid is closed" no more exists. Follow below steps to prevent Fedora 39 Workstation from suspend when laptop lid is closed. as normal user: create ~/.config/autostart/ignore-lid-switch-tweak.desktop file with following content [Desktop Entry] Type=Application Name=ignore-lid-switch-tweak Exec=/usr/libexec/gnome-tweak-tool-lid-inhibitor as root: create /usr/libexec/gnome-tweak-tool-lid-inhibitor file with following content: #!/usr/bin/python3 # SPDX-License-Identifier: GPL-3.0+… Continue reading Fedora 39 - GNOME 45 - missing "Suspend when lid is closed" in Tweak Tools
How to permit traffic from KVM guest to KVM host with firewalld, for instance to access HTTP server running on KVM host form guest VMs. #permit traffic on firewall firewall-cmd --add-service=http --zone=libvirt firewall-cmd --add-service=http --zone=libvirt --permanent #verify firewall-cmd --list-all-zones
How to upgrade PostgreSQL database running as Docker container between major versions. Procedure useful for migrating Nextcloud PostgreSQL 13 container database to PostgreSQL 15 database. Naming convention: nextcloud-postgres13 - container with PostgreSQL 13 database nextcloud-postgres15 - container with PostgreSQL 15 database Before performing migration start new container with PostgreSQL 15 database. Following docker-compose YAML file… Continue reading Nextcloud - Upgrading PostgreSQL database running as Docker container between major versions