package/fluent-bit: add new package

Fluent Bit is a super fast, lightweight, and highly
scalable logging and metrics processor and forwarder.

Signed-off-by: Thomas Devoogdt <thomas.devoogdt@barco.com>
[Peter: add DEVELOPERS entry, drop STATIC_LIBS dependency]
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

DEVELOPERS

@@ -2820,6 +2820,9 @@ F:	support/testing/tests/package/test_perl_lwp_protocol_https.py
 F:	utils/size-stats-compare
 F:	toolchain/
 
+N:	Thomas Devoogdt <thomas@devoogdt.com>
+F:	package/fluent-bit/
+
 N:	Thomas Huth <huth@tuxfamily.org>
 F:	board/qemu/m68k-mcf5208/
 F:	configs/qemu_m68k_mcf5208_defconfig

package/Config.in

@@ -2610,6 +2610,7 @@ menu "System tools"
 	source "package/efivar/Config.in"
 	source "package/embiggen-disk/Config.in"
 	source "package/emlog/Config.in"
+	source "package/fluent-bit/Config.in"
 	source "package/ftop/Config.in"
 	source "package/getent/Config.in"
 	source "package/gkrellm/Config.in"

package/fluent-bit/Config.in

@@ -0,0 +1,12 @@
+config BR2_PACKAGE_FLUENT_BIT
+	bool "fluent-bit"
+	depends on BR2_TOOLCHAIN_USES_GLIBC
+	select BR2_PACKAGE_OPENSSL
+	select BR2_PACKAGE_LIBYAML
+	help
+	  Fast and Lightweight Logs and Metrics processor.
+
+	  https://github.com/fluent/fluent-bit
+
+comment "fluent-bit needs a glibc toolchain"
+	depends on !BR2_TOOLCHAIN_USES_GLIBC

package/fluent-bit/S99fluent-bit

@@ -0,0 +1,72 @@
+#!/bin/sh
+
+DAEMON="fluent-bit"
+PID_FILE="/var/run/$DAEMON.pid"
+CONF_FILE="/etc/$DAEMON/$DAEMON.conf"
+
+FLUENT_BIT_ARGS=""
+
+# shellcheck source=/dev/null
+[ -r "/etc/default/$DAEMON" ] && . "/etc/default/$DAEMON"
+
+start() {
+	printf 'Starting %s: ' "$DAEMON"
+	# shellcheck disable=SC2086 # we need the word splitting
+	start-stop-daemon -S -q -b -m -p "$PID_FILE" --exec "/usr/bin/$DAEMON" \
+		-- -c "$CONF_FILE" $FLUENT_BIT_ARGS
+	status=$?
+	if [ "$status" -eq 0 ]; then
+		echo "OK"
+	else
+		echo "FAIL"
+	fi
+	return "$status"
+}
+
+stop() {
+	printf 'Stopping %s: ' "$DAEMON"
+	start-stop-daemon -K -q -p "$PID_FILE"
+	status=$?
+
+	if [ -f "$PID_FILE" ]; then
+		pid=$(cat "$PID_FILE")
+		rm -f "$PID_FILE"
+
+		# https://docs.fluentbit.io/manual/administration/configuring-fluent-bit/yaml/configuration-file#config_section
+		# The default grace time is set to 5 seconds, so use 6 seconds to have some margin.
+		timeout=6
+		while kill -0 "$pid" 2>/dev/null; do
+			[ $timeout -eq 0 ] && status=1 && break
+			timeout=$((timeout - 1))
+			sleep 1
+		done
+	fi
+
+	if [ "$status" -eq 0 ]; then
+		echo "OK"
+	else
+		echo "FAIL"
+	fi
+	return "$status"
+}
+
+restart() {
+	stop
+	start
+}
+
+case "$1" in
+start)
+	start
+	;;
+stop)
+	stop
+	;;
+restart | reload)
+	restart
+	;;
+*)
+	echo "Usage: $0 {start|stop|restart}"
+	exit 1
+	;;
+esac

package/fluent-bit/fluent-bit.hash

@@ -0,0 +1,3 @@
+# Locally computed
+sha256  8ff5566389033669feabc9c69a5c6f417dad5c8b066454388e6a706507262acf  fluent-bit-2.0.8.tar.gz
+sha256  0d542e0c8804e39aa7f37eb00da5a762149dc682d7829451287e11b938e94594  LICENSE

package/fluent-bit/fluent-bit.mk

@@ -0,0 +1,49 @@
+################################################################################
+#
+# fluent-bit
+#
+################################################################################
+
+FLUENT_BIT_VERSION = 2.0.8
+FLUENT_BIT_SITE = $(call github,fluent,fluent-bit,v$(FLUENT_BIT_VERSION))
+FLUENT_BIT_LICENSE = Apache-2.0
+FLUENT_BIT_LICENSE_FILES = LICENSE
+FLUENT_BIT_DEPENDENCIES = host-bison host-flex libyaml libopenssl
+
+FLUENT_BIT_CONF_OPTS += \
+	-DFLB_DEBUG=No \
+	-DFLB_RELEASE=Yes \
+	-DFLB_EXAMPLES=No \
+	-DFLB_CHUNK_TRACE=No \
+	-DFLB_BACKTRACE=No
+
+ifeq ($(BR2_PACKAGE_LUAJIT),y)
+FLUENT_BIT_CONF_OPTS += -DFLB_LUAJIT=Yes
+FLUENT_BIT_DEPENDENCIES += luajit
+else
+FLUENT_BIT_CONF_OPTS += -DFLB_LUAJIT=No
+endif
+
+# Force bundled miniz to be linked statically.
+# https://github.com/fluent/fluent-bit/issues/6711
+FLUENT_BIT_CONF_OPTS += \
+	-DBUILD_SHARED_LIBS=OFF
+
+# Move the config files from /usr/etc/ to /etc/.
+# https://github.com/fluent/fluent-bit/issues/6619
+FLUENT_BIT_CONF_OPTS += \
+	-DCMAKE_INSTALL_SYSCONFDIR="/etc/"
+
+# Undefining _FILE_OFFSET_BITS here because of a "bug" with glibc fts.h
+# large file support.
+# See https://bugzilla.redhat.com/show_bug.cgi?id=574992 for more information.
+FLUENT_BIT_CONF_OPTS += \
+	-DCMAKE_C_FLAGS="$(TARGET_CFLAGS) -U_FILE_OFFSET_BITS" \
+	-DCMAKE_CXX_FLAGS="$(TARGET_CXXFLAGS) -U_FILE_OFFSET_BITS"
+
+define FLUENT_BIT_INSTALL_INIT_SYSV
+	$(INSTALL) -D -m 0755 package/fluent-bit/S99fluent-bit \
+		$(TARGET_DIR)/etc/init.d/S99fluent-bit
+endef
+
+$(eval $(cmake-package))