jirutka

This is a simple solution for when you use keepalived with VRRP to failover between two instances of an application (e.g. nginx) that uses Redis/Valkey.

It doesn’t provide a high guarantee of data consistency, so it’s only suitable for caches, user sessions and similar!

keepalived.conf example:

vrrp_instance vi {
    ...
    notify "/etc/keepalived/scripts/notify_valkey.sh"
}

jirutka

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "type": "object",
  "properties": {
    "id": {
      "type": "string"
    },
    "realm": {
      "type": "string"
    },

jirutka

#!/bin/sh
# SPDX-FileCopyrightText: 2023 Jakub Jirutka <jakub@jirutka.cz>
# SPDX-License-Identifier: MIT
set -eu

PROGNAME='qm-replace-disk'
VERSION='0.1.0'

# Defaults
DISK='scsi0'

jirutka

pub(crate) struct ChunksExact<const N: usize, I> {
    iter: I,
}

impl<const N: usize, I: Iterator<Item = T>, T> Iterator for ChunksExact<N, I> {
    type Item = [T; N];

    fn next(&mut self) -> Option<Self::Item> {
        assert_ne!(N, 0);

jirutka

#include <stdbool.h>

typedef char* str;

#define GENERATE_OPTION_TYPES(Option) \
    Option(int) \
    Option(str)

#define GENERATE_RESULT_TYPES(Result) \
    Result(str, int) \

jirutka

#!/bin/sh
# SPDX-License-Identifier: MIT
# SPDX-FileCopyrightText: 2021 Jakub Jirutka <jakub@jirutka.cz>
#---help---
# Usage: radacct-rotate [options]
#
# Compress and later remove old FreeRADIUS' radacct log files with "-YYYYMMDD"
# suffix.
#
# Options:

jirutka

Arch Linux Installation

1. Securely erase drive

cryptsetup open --type plain -d /dev/urandom /dev/nvme0n1 to-be-wiped
dd if=/dev/zero of=/dev/mapper/to-be-wiped bs=1M status=progress
cryptsetup close to-be-wiped
wipefs -a /dev/nvme0n1

jirutka

{
    "poradiCse": [
        "004",
        "248",
        "008",
        "012",
        "016",
        "850",
        "020",
        "024",

jirutka

create function array_uniq (a anyarray) returns anyarray
immutable
language sql
as $$
  select array_agg(distinct x) from unnest(a) x;
$$;
comment on function array_uniq is
  'Sorts and deduplicates elements of an array.';

create function trg_person_roles_normalize () returns trigger

jirutka

-------------------------------------------------------------------------------
-- EXAMPLE USAGE
--
-- create table specialization (
--   id bigserial,
--   name text not null,
--   study_plan_codes text[] not null default '{}'
-- )
--
-- create constraint trigger study_plan_codes_unique_check