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Pi hole pre-install hook to disable systemd-resolved's DNS Stub Listener (#258)

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Co-authored-by: Steven Briscoe <me@stevenbriscoe.com>
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Steven Briscoe 2022-11-07 16:24:40 +10:00 committed by GitHub
parent 62ca19eeff
commit d769a428b9
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2 changed files with 34 additions and 1 deletions
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33
pi-hole/hooks/pre-install Executable file
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#!/usr/bin/env bash
set -euo pipefail
RESOLVED_SERVICE_NAME="systemd-resolved"
RESOLVED_CONF_FILE="/etc/systemd/resolved.conf"
# Check if the 'systemd-resolved' service is running
if ! systemctl is-active --quiet service "${RESOLVED_SERVICE_NAME}"; then
echo "Service '${RESOLVED_SERVICE_NAME}' is not running"
exit
fi
# Check if the DNS Stub Listener is running
if cat "${RESOLVED_CONF_FILE}" | grep --quiet "^DNSStubListener=no$"; then
echo "DNSStubListener already turned off"
exit
fi
echo "Turning off the DNS Stub Listener"
# Turn off DNSStubListener within config file
sed -r -i.orig 's/#?DNSStubListener=yes/DNSStubListener=no/g' "${RESOLVED_CONF_FILE}"
# Remove active resolv.conf which would have
# localhost (systemd-resolved's DNS listener) as the DNS resolver
rm -f /etc/resolv.conf
# Create a symlink between systemd-resolved's upstream resolv.conf
# and the OS's resolv.conf
ln -s /run/systemd/resolve/resolv.conf /etc/resolv.conf
echo "Restart service '${RESOLVED_SERVICE_NAME}'"
systemctl restart "${RESOLVED_SERVICE_NAME}"

2
pi-hole/umbrel-app.yml
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@ -1,4 +1,4 @@
manifestVersion: 1
manifestVersion: 1.1
id: pi-hole
category: Networking
name: Pi-hole