POSTGRESQL10.3原始碼安裝主從搭建 pgpoolii + keepalive 高可用(未成功，實驗中)

一、下載POSTGRESQL原始碼安裝包及主機配置

虛擬機器環境
node1  192.168.159.151
node2  192.168.159.152

作業系統為redhat6.5
資料庫為postgresql10.3

兩個節點均配置/etc/hosts
vi /etc/hosts
node1  192.168.159.151
node2  192.168.159.152



二、編譯安裝
（1）建立postgres使用者
useradd -m -r -s /bin/bash -u 5432 postgres
（2）安裝相關依賴包
yum install gettext gcc make perl python perl-ExtUtils-Embed   readline-devel   zlib-devel    openssl-devel   libxml2-devel  cmake  gcc-c++ libxslt-devel  openldap-devel  pam-devel  python-devel  cyrus-sasl-devel  libgcrypt-devel  libgpg-error-devel  libstdc++-devel

（3）配置POSTGRES
./configure --prefix=/opt/postgresql-10.3 --with-segsize=8 --with-wal-segsize=64 --with-wal-blocksize=16 --with-blocksize=16 --with-libedit-preferred --with-perl --with-python --with-openssl --with-libxml --with-libxslt --enable-thread-safety --enable-nls=zh_CN

最後幾行出現以下黃色輸出即配置正確，否則根據報錯提示繼續安裝依賴包
configure: using CPPFLAGS= -D_GNU_SOURCE -I/usr/include/libxml2 
configure: using LDFLAGS=  -Wl,--as-needed
configure: creating ./config.status
config.status: creating GNUmakefile
config.status: creating src/Makefile.global
config.status: creating src/include/pg_config.h
config.status: creating src/include/pg_config_ext.h
config.status: creating src/interfaces/ecpg/include/ecpg_config.h
config.status: linking src/backend/port/tas/dummy.s to src/backend/port/tas.s
config.status: linking src/backend/port/dynloader/linux.c to src/backend/port/dynloader.c
config.status: linking src/backend/port/posix_sema.c to src/backend/port/pg_sema.c
config.status: linking src/backend/port/sysv_shmem.c to src/backend/port/pg_shmem.c
config.status: linking src/backend/port/dynloader/linux.h to src/include/dynloader.h
config.status: linking src/include/port/linux.h to src/include/pg_config_os.h
config.status: linking src/makefiles/Makefile.linux to src/Makefile.port

（4）編譯
make && make install

最後幾行出現以下黃色輸出即配置正確
make[1]: Leaving directory `/opt/postgresql-10.3/src'
make -C config install
make[1]: Entering directory `/opt/postgresql-10.3/config'
/bin/mkdir -p '/opt/postgresql-10.3/lib/pgxs/config'
/usr/bin/install -c -m 755 ./install-sh '/opt/postgresql-10.3/lib/pgxs/config/install-sh'
/usr/bin/install -c -m 755 ./missing '/opt/postgresql-10.3/lib/pgxs/config/missing'
make[1]: Leaving directory `/opt/postgresql-10.3/config'
PostgreSQL installation complete.

（5）安裝
make world && make install -world

最後幾行出現以下黃色輸出即配置正確
make[1]: Leaving directory `/opt/postgresql-10.3/src'
make -C config install
make[1]: Entering directory `/opt/postgresql-10.3/config'
/bin/mkdir -p '/opt/postgresql-10.3/lib/pgxs/config'
/usr/bin/install -c -m 755 ./install-sh '/opt/postgresql-10.3/lib/pgxs/config/install-sh'
/usr/bin/install -c -m 755 ./missing '/opt/postgresql-10.3/lib/pgxs/config/missing'
make[1]: Leaving directory `/opt/postgresql-10.3/config'
PostgreSQL installation complete.
make: Leaving directory `/opt/postgresql-10.3'

（6）建立相關目錄及配置環境變數
mkdir -p /data/pgdata/serverlog
mkdir /data/pg
su - postgres
vi .bash_profile  （刪除原來的所有，以下黃色部分直接複製貼上）
# .bash_profile
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi

# User specific environment and startup programs
PATH=$PATH:$HOME/bin
export PATH

# postgres
#PostgreSQL埠
PGPORT=5432

#PostgreSQL資料目錄
PGDATA=/data/pgdata
export PGPORT PGDATA 

#所使用的語言
export LANG=zh_CN.utf8

#PostgreSQL 安裝目錄
export PGHOME=/data/pg

#PostgreSQL 連線庫檔案
export LD_LIBRARY_PATH=$PGHOME/lib:/lib64:/usr/lib64:/usr/local/lib64:/lib:/usr/lib:/usr/local/lib:$LD_LIBRARY_PATH
export DATE=`date +"%Y%m%d%H%M"`

#將PostgreSQL的命令列新增到 PATH 環境變數
export PATH=$PGHOME/bin:$PATH

#PostgreSQL的 man 手冊
export MANPATH=$PGHOME/share/man:$MANPATH

#PostgreSQL的預設使用者
export PGUSER=postgres

#PostgreSQL預設主機地址
export PGHOST=127.0.0.1

#預設的資料庫名
export PGDATABASE=postgres

#定義日誌存放目錄
PGLOG="$PGDATA/serverlog"


source .bash_profile

（7）初始化資料庫
#執行資料庫初始化指令碼
root使用者登入
chown -R postgres.postgres /data/
su - postgres
$/opt/postgresql-10.3/bin/initdb --encoding=utf8 -D /data/pg/data


警告:為本地連線啟動了 "trust" 認證.
你可以透過編輯 pg_hba.conf 更改或你下次
行 initdb 時使用 -A或者--auth-local和--auth-host選項.


Success. You can now start the database server using:


啟動資料庫
su - postgres
/opt/postgresql-10.3/bin/pg_ctl -D /data/pg/data -l logfile start



（8）相關命令複製
root使用者
mkdir /data/pg/bin
cp /opt/postgresql-10.3/bin/*   /data/pg/bin
chown -R postgres.postgres  /data/pg/bin


三、postgresql主從搭建

1、主庫配置

checkpoint_timeout = 30min
max_wal_size = 3GB
min_wal_size = 64MB

mkdir /data/pg/data/archive

（5） 啟動備庫