Adding knot-resolver tools.

Signed-off-by: Daniel Baumann <daniel.baumann@open-infrastructure.net>

2 files changed, 118 insertions, 0 deletions

diff --git a/knot-resolver/Makefile b/knot-resolver/Makefile
new file mode 100644
index 0000000..3a2e4b9
--- /dev/null
+++ b/knot-resolver/Makefile
@@ -0,0 +1,80 @@
+# Open Infrastructure: service-tools
+
+# Copyright (C) 2014-2021 Daniel Baumann <daniel.baumann@open-infrastructure.net>
+#
+# SPDX-License-Identifier: GPL-3.0+
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+SHELL := sh -e
+
+SCRIPTS = bin/*
+
+all: build
+
+test:
+	@echo -n "Checking for syntax errors with sh... "
+	@for SCRIPT in $(SCRIPTS); \
+	do \
+		sh -n $${SCRIPT}; \
+		echo -n "."; \
+	done
+	@echo " done."
+
+	@echo -n "Checking for bashisms... "
+	@if [ -x /usr/bin/checkbashisms ]; \
+	then \
+		for SCRIPT in $(SCRIPTS); \
+		do \
+			checkbashisms -f -x $${SCRIPT}; \
+			echo -n "."; \
+		done; \
+	else \
+		echo "Note: devscripts not installed, skipping checkbashisms."; \
+	fi
+	@echo " done."
+
+	@echo -n "Checking with shellcheck... "
+	@if [ -x /usr/bin/shellcheck ]; \
+	then \
+		for SCRIPT in $(SCRIPTS); \
+		do \
+			shellcheck -e SC2039 $${SCRIPT}; \
+			echo -n "."; \
+		done; \
+	else \
+		echo "Note: shellcheck not installed, skipping shellcheck."; \
+	fi
+	@echo " done."
+
+build:
+
+install: build
+	mkdir -p $(DESTDIR)/usr/bin
+	cp -r bin/* $(DESTDIR)/usr/bin
+
+uninstall:
+	for FILE in bin/*; \
+	do \
+		rm -f $(DESTDIR)/usr/bin/$$(basename $${FILE}); \
+	done
+	rmdir --ignore-fail-on-non-empty --parents $(DESTDIR)/usr/bin || true
+
+	rmdir --ignore-fail-on-non-empty --parents $(DESTDIR) || true
+
+clean:
+
+distclean:
+
+reinstall: uninstall install
diff --git a/knot-resolver/bin/kresd-cache-clear b/knot-resolver/bin/kresd-cache-clear
new file mode 100755
index 0000000..5eadee0
--- /dev/null
+++ b/knot-resolver/bin/kresd-cache-clear
@@ -0,0 +1,38 @@
+#!/bin/sh
+
+set -e
+
+HOSTS="${*}"
+
+if [ -z "${HOSTS}" ]
+then
+	echo "Usage: ${0} localhost|[HOST1 HOST2 ...]" >&2
+	exit 1
+fi
+
+for HOST in ${HOSTS}
+do
+	case "${HOST}" in
+		localhost)
+			NUMBER="$(systemctl | grep -c 'kresd@[0-9].service')"
+
+			for NUMBER in $(seq 1 "${NUMBER}")
+			do
+				echo "Flushing localhost, resolver ${NUMBER}"
+				echo "cache.clear()" | sudo socat - UNIX-CONNECT:/run/knot-resolver/control/"${NUMBER}"
+			done
+			;;
+
+		*)
+			NUMBER="$(ssh "${HOST}" sudo systemctl | grep -c 'kresd@[0-9].service')"
+
+			for NUMBER in $(seq 1 "${NUMBER}")
+			do
+				echo "Flushing ${HOST}, resolver ${NUMBER}"
+				echo "cache.clear()" | ssh "${HOST}" sudo socat - UNIX-CONNECT:/run/knot-resolver/control/"${NUMBER}"
+			done
+			;;
+	esac
+done
+
+echo