pgbouncer: add new package

libs/pgbouncer/Makefile

@@ -0,0 +1,72 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=pgbouncer
+PKG_VERSION:=1.25.1
+PKG_RELEASE:=1
+
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_SOURCE_URL:=https://www.pgbouncer.org/downloads/files/$(PKG_VERSION)/
+PKG_HASH:=6e566ae92fe3ef7f6a1b9e26d6049f7d7ca39c40e29e7b38f6d5500ae15d8465
+
+PKG_MAINTAINER:= Carson Wang <r03944040@g.ntu.edu.tw>
+PKG_LICENSE:=ISC
+PKG_LICENSE_FILES:=COPYRIGHT
+
+PKG_INSTALL:=1
+PKG_BUILD_PARALLEL:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/pgbouncer
+  SECTION:=net
+  CATEGORY:=Network
+  SUBMENU:=Database
+  TITLE:=Lightweight connection pooler for PostgreSQL
+  URL:=https://www.pgbouncer.org/
+  DEPENDS:=+libevent2 +libc +libpthread +libopenssl +libpq +pgsql-cli +pgsql-server
+endef
+
+define Package/pgbouncer/description
+  PgBouncer is a lightweight connection pooler for PostgreSQL.
+  It can pool connections to one or more databases and serve clients
+  over TCP or Unix sockets.
+endef
+
+CONFIGURE_ARGS += \
+	--disable-debug \
+	--without-systemd \
+	--with-libevent=$(STAGING_DIR)/usr \
+
+TARGET_CFLAGS += -std=gnu99
+
+define Build/Compile
+	$(MAKE) -C $(PKG_BUILD_DIR) \
+		$(TARGET_CONFIGURE_OPTS) \
+		CFLAGS="$(TARGET_CFLAGS)" \
+		LDFLAGS="$(TARGET_LDFLAGS)" \
+		pgbouncer
+endef
+
+define Build/Install
+	$(INSTALL_DIR) $(PKG_BUILD_DIR)/ipkg-install/usr/bin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/pgbouncer $(PKG_BUILD_DIR)/ipkg-install/usr/bin/
+endef
+
+define Package/pgbouncer/conffiles
+/etc/pgbouncer/pgbouncer.ini
+/etc/pgbouncer/userlist.txt
+endef
+
+define Package/pgbouncer/install
+	$(INSTALL_DIR) $(1)/usr/bin
+	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/bin/pgbouncer $(1)/usr/bin/
+
+	$(INSTALL_DIR) $(1)/etc/pgbouncer
+	$(INSTALL_CONF) ./files/pgbouncer.ini $(1)/etc/pgbouncer/
+	$(INSTALL_CONF) ./files/userlist.txt $(1)/etc/pgbouncer/
+
+	$(INSTALL_DIR) $(1)/etc/init.d
+	$(INSTALL_BIN) ./files/pgbouncer.init $(1)/etc/init.d/pgbouncer
+endef
+
+$(eval $(call BuildPackage,pgbouncer))

libs/pgbouncer/files/pgbouncer.ini

@@ -0,0 +1,49 @@
+; Please refer to https://www.pgbouncer.org/config.html
+[databases]
+; database_name = host=localhost port=5432 dbname=database_name
+* = host=127.0.0.1 port=5432
+
+[pgbouncer]
+listen_addr = 0.0.0.0
+listen_port = 6432
+
+; Unix socket (Optional)
+;unix_socket_dir = /var/run/pgbouncer
+
+auth_type = scram-sha-256
+auth_file = /etc/pgbouncer/userlist.txt
+auth_user = pgbouncer_auth
+
+admin_users = pgbouncer_admin
+stats_users = pgbouncer_admin
+
+pool_mode = transaction
+max_client_conn = 100
+default_pool_size = 20
+min_pool_size = 5
+reserve_pool_size = 5
+reserve_pool_timeout = 5
+
+logfile = /var/log/pgbouncer/pgbouncer.log
+pidfile = /var/run/pgbouncer/pgbouncer.pid
+
+max_db_connections = 50
+max_user_connections = 50
+
+server_lifetime = 3600
+server_idle_timeout = 600
+query_timeout = 0
+query_wait_timeout = 120
+client_idle_timeout = 0
+
+server_reset_query = DISCARD ALL
+server_check_delay = 30
+server_check_query = select 1
+
+; DNS setting
+dns_max_ttl = 15
+dns_zone_check_period = 0
+
+; TLS (if need be)
+;client_tls_sslmode = disable
+;server_tls_sslmode = disable

libs/pgbouncer/files/pgbouncer.init

@@ -0,0 +1,79 @@
+#!/bin/sh /etc/rc.common
+
+START=95
+STOP=10
+
+USE_PROCD=1
+PROG=/usr/bin/pgbouncer
+CONFIGFILE=/etc/pgbouncer/pgbouncer.ini
+PGBOUNCER_USER=pgbouncer
+PGBOUNCER_GROUP=pgbouncer
+
+boot() {
+    setup_user
+    start "$@"
+}
+
+setup_user() {
+    if ! grep -q "^${PGBOUNCER_GROUP}:" /etc/group; then
+        echo "${PGBOUNCER_GROUP}:x:888:" >> /etc/group
+    fi
+
+    if ! grep -q "^${PGBOUNCER_USER}:" /etc/passwd; then
+        echo "${PGBOUNCER_USER}:x:888:888:PgBouncer:/var/lib/pgbouncer:/bin/false" >> /etc/passwd
+    fi
+
+    mkdir -p /var/log/pgbouncer
+    mkdir -p /var/run/pgbouncer
+    mkdir -p /var/lib/pgbouncer
+
+    chown -R ${PGBOUNCER_USER}:${PGBOUNCER_GROUP} /var/log/pgbouncer
+    chown -R ${PGBOUNCER_USER}:${PGBOUNCER_GROUP} /var/run/pgbouncer
+    chown -R ${PGBOUNCER_USER}:${PGBOUNCER_GROUP} /var/lib/pgbouncer
+    chown -R ${PGBOUNCER_USER}:${PGBOUNCER_GROUP} /etc/pgbouncer
+
+    chmod 755 /var/log/pgbouncer
+    chmod 755 /var/run/pgbouncer
+    chmod 755 /var/lib/pgbouncer
+    chmod 755 /etc/pgbouncer
+    chmod 644 /etc/pgbouncer/pgbouncer.ini
+    chmod 600 /etc/pgbouncer/userlist.txt
+}
+
+start_service() {
+    setup_user
+
+    if [ -f /var/run/pgbouncer/pgbouncer.pid ]; then
+        local pid=$(cat /var/run/pgbouncer/pgbouncer.pid 2>/dev/null)
+        if [ -n "$pid" ] && ! kill -0 $pid 2>/dev/null; then
+            rm -f /var/run/pgbouncer/pgbouncer.pid
+        fi
+    fi
+
+    procd_open_instance
+    procd_set_param command $PROG $CONFIGFILE
+    procd_set_param user ${PGBOUNCER_USER}
+    procd_set_param respawn ${respawn_threshold:-3600} ${respawn_timeout:-5} ${respawn_retry:-5}
+    procd_set_param stdout 1
+    procd_set_param stderr 1
+    procd_close_instance
+}
+
+stop_service() {
+    if [ -f /var/run/pgbouncer/pgbouncer.pid ]; then
+        kill $(cat /var/run/pgbouncer/pgbouncer.pid) 2>/dev/null
+        rm -f /var/run/pgbouncer/pgbouncer.pid
+    fi
+}
+
+reload_service() {
+    if [ -f /var/run/pgbouncer/pgbouncer.pid ]; then
+        kill -HUP $(cat /var/run/pgbouncer/pgbouncer.pid)
+    else
+        start
+    fi
+}
+
+service_triggers() {
+    procd_add_reload_trigger "pgbouncer"
+}

libs/pgbouncer/files/userlist.txt

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+; PgBouncer User list
+; Format: "username" "password_hash"
+;
+; Generate password hash:
+; echo -n "passwordusername" | md5sum
+; add "md5" before password string
+;
+; Example:
+; "myuser" "md5d8578edf8458ce06fbc5bb76a58c5ca4"