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#!/bin/sh
# Copyright (C) 2026 Doan Luu Duc Tai <doan@luuduct.ai>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
set -eu
[ "$(id -u)" = 0 ] || { echo 'Run this script through sudo.' >&2; exit 1; }
id ops >/dev/null
apt-get update
apt-get install -y --no-install-recommends podman uidmap passt slirp4netns fuse-overlayfs netavark aardvark-dns
awk -F: '$1 == "ops" && $3 >= 65536 { found=1 } END { exit !found }' /etc/subuid
awk -F: '$1 == "ops" && $3 >= 65536 { found=1 } END { exit !found }' /etc/subgid
install -d -m 755 /etc/sysctl.d
printf '%s\n' 'net.ipv4.ip_unprivileged_port_start=80' > /etc/sysctl.d/90-stack-rootless-ports.conf
sysctl -p /etc/sysctl.d/90-stack-rootless-ports.conf
loginctl enable-linger ops
printf '%s\n' 'Podman prerequisites ready. Existing production services remain running.'
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