centos7编译安装pgbouncer

1、下载pgbouncer程序包和libevent依赖包

wget https://github.com/libevent/libevent/releases/download/release-2.1.11-stable/libevent-2.1.11-stable.tar.gz  //pgbouncer需要用到libevent依赖包
wget http://www.pgbouncer.org/downloads/files/1.12.0/pgbouncer-1.12.0.tar.gz

2、安装编译所需的环境依赖

 yum install gcc gcc-c++ make openssl-devel

3、解压并编译安装

tar -xf libevent-2.1.11-stable.tar.gz
tar -xf pgbouncer-1.12.0.tar.gz

4、编译安装libevent

 ./configure --prefix=/usr/local/libevent
make -j 2
make install

5、配置环境变量

echo "export PKG_CONFIG_PATH=/usr/local/libevent/lib/pkgconfig" >> ~/.bashrc
cat ~/.bashrc
source ~/.bashrc

9、授权postgres用户访问libevent-2.1.so.7权限

setfacl -Rm u:postgres:rwx /usr/

10、创建软连接

ln -s /usr/local/libevent/lib/libevent-2.1.so.7 /usr/lib64/libevent-2.1.so.7

11、编译安装pgbouncer

./configure --prefix=/usr/local/pgbouncer/
make -j 2
make install

12、创建pgbouncer.ini配置文件

cat /etc/pgbouncer/pgbouncer.ini
[databases]
postgres = host=127.0.0.1 port=5432 dbname=postgres

[pgbouncer]
logfile = /var/log/pgbouncer/pgbouncer.log
pidfile = /var/run/pgbouncer/pgbouncer.pid
listen_addr = 10.15.150.41
listen_port = 6432
unix_socket_dir = /var/run/postgresql
auth_type = md5
auth_file = /etc/pgbouncer/userlist.txt
admin_users = postgres
ignore_startup_parameters = extra_float_digits,geqo

pool_mode = session
server_reset_query = DISCARD ALL
max_client_conn = 10000
default_pool_size = 1000
reserve_pool_size = 30
reserve_pool_timeout = 5
max_db_connections = 5000
pkt_buf = 8192

　13、创建用户名及密码认证文件，确保仅postgres用户可以访问，权限600

cat /etc/pgbouncer/userlist.txt
"postgres" "P2poRLYZ8"

　14、配置开机自启服务,由systemctl管理，创建pgbouncer.service文件

cat /etc/systemd/system/pgbouncer.service
[Unit]
Description=pgBouncer connection pooling for PostgreSQL
After=syslog.target network.target

[Service]
Type=forking

User=postgres
Group=postgres

PermissionsStartOnly=true
ExecStartPre=-/bin/mkdir -p /var/run/pgbouncer /var/log/pgbouncer
ExecStartPre=/bin/chown -R postgres:postgres /var/run/pgbouncer /var/log/pgbouncer
ExecStart=/usr/local/pgbouncer/bin/pgbouncer -d /etc/pgbouncer/pgbouncer.ini
ExecReload=/bin/kill -SIGHUP $MAINPID
PIDFile=/var/run/pgbouncer/pgbouncer.pid

LimitNOFILE=100000

[Install]
WantedBy=multi-user.target

15、填写可执行权限

chmod +x /etc/systemd/system/pgbouncer.service

16、启动服务

systemctl start pgbouncer

17、查询启动状态systemctl status pgbouncer

18、加入开机启动项

systemctl enable pgbouncer