步骤一：安装postgresql软件
安装 postgresql实例，从postgresql官网上
https://www.postgresql.org/ 下载postgresql安装软件，解压缩，创建postgres用户和组，添加环境变量。
我这里下载的版本是 pgsql9.5.1。
创建postgresql实例
步骤一：创建目录和文件：
su - postgres
mkdir -p /data/pgsql/{data,data02}
步骤二：初始化实例1：
export PGDATA=/data/pgsql/data
initdb
步骤三：启动postgresql实例1
实例2也可用按照上面的三个步骤进行创建：
初始实例2：
export PGDATA=/data/pgsql/data02
env | grep PGDATA
initdb
启动实例2：
pg_ctl stop -D /data/pgsql/data02 -m fast
步骤二：配置实例监听和外部访问
vim postgresql.conf
listen_addresses = '*' # what IP address(es) to listen on;
port = 5433 # (change requires restart)
max_connections = 100 # (change requires restart)
重启postgresql实例的命令为：
pg_ctl stop -D /data/pgsql/data02 -m fast
vim pg_hba.conf
# IPv4 local connections:
host all all 192.168.1.0/24 trust
pg_ctl reload
示例：
psql -h 192.168.10.119 -p 5432 testdb postgres
psql -h 192.168.10.119 -p 5433 postgres postgres
############################
第二部分 在Linux系统下安装 Slony-I 软件
编译安装 slony-I 软件
在 slony 官方网站 http://www.slony.info/ ，点击 Dowload 进入下载页面（注意：由于我的postgresql版本是比较新的 9.5，一开始使用 slony1-2.1.3版本有报错，于是安装了最新的 slony1-2.2.5 版本）；
选择合适的版本，这里选择 2.2 ；
弹出的界面选择直接下载源码，还是使用cvs界面，这里选择“直接下载源码”；
下载完成后，把下载得来的源码包放到一个目录下，使用命令解压缩：
cd /usr/local/src
rz slony1-2.2.5.tar.bz2
tar xvf slony1-2.2.5.tar.bz2
解压生成目录 slony1-2.2.5 ，进入此目录，用Linux编译三板斧进行编译安装：
cd slony-2.2.5
make
make install
另外 slony-I 中有一套Perl脚本工具，名称为 altperl scripts，可以简化slony-I的配置，默认编译不会带上该脚本，需要编译时，带上 --with perltools进行编译；
which postgres
which slon
which slonik
安装过程为：
[postgres@MysqL193 slony1-2.2.5]$ [postgres@MysqL193 slony1-2.2.5]$ ./configure --with-perltools checking build system type... x86_64-unkNown-linux-gnu checking host system type... x86_64-unkNown-linux-gnu checking which template to use... linux configure: using CFLAGS= checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking for ld used by GCC... /usr/bin/ld checking if the linker (/usr/bin/ld) is GNU ld... yes checking for perl... /usr/bin/perl checking for tar... /bin/tar checking for bison... bison -y checking for sed... sed checking for the pthreads library -lpthreads... no checking whether pthreads work without any flags... no checking whether pthreads work with -Kthread... no checking whether pthreads work with -kthread... no checking for the pthreads library -llthread... no checking whether pthreads work with -pthread... yes checking for joinable pthread attribute... PTHREAD_CREATE_JOINABLE checking if more special flags are required for pthreads... no checking for cc_r... gcc checking how to run the C preprocessor... gcc -E checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking fcntl.h usability... yes checking fcntl.h presence... yes checking for fcntl.h... yes checking limits.h usability... yes checking limits.h presence... yes checking for limits.h... yes checking stddef.h usability... yes checking stddef.h presence... yes checking for stddef.h... yes checking sys/socket.h usability... yes checking sys/socket.h presence... yes checking for sys/socket.h... yes checking sys/time.h usability... yes checking sys/time.h presence... yes checking for sys/time.h... yes checking for inttypes.h... (cached) yes checking for gettimeofday... yes checking for dup2... yes checking for alarm... yes checking for memset... yes checking for select... yes checking for strdup... yes checking for strerror... yes checking for strtol... yes checking for strtoul... yes checking for int32_t... yes checking for uint32_t... yes checking for u_int32_t... yes checking for int64_t... yes checking for uint64_t... yes checking for u_int64_t... yes checking for size_t... yes checking for ssize_t... yes checking for POSIX signal interface... yes checking for flex... /usr/bin/flex configure: using checking if you have requested slony1-engine building... yes checking for pg_config... /usr/local/pgsql/bin/pg_config pg_config says pg_bindir is /usr/local/pgsql9.5.1/bin/ pg_config says pg_libdir is /usr/local/pgsql9.5.1/lib/ pg_config says pg_includedir is /usr/local/pgsql9.5.1/include/ pg_config says pg_pkglibdir is /usr/local/pgsql9.5.1/lib/ pg_config says pg_includeserverdir is /usr/local/pgsql9.5.1/include/server/ checking for correct version of Postgresql... pg_config says pg_sharedir is /usr/local/pgsql9.5.1/share/ checking for PQunescapeBytea in -lpq... yes checking libpq-fe.h usability... yes checking libpq-fe.h presence... yes checking for libpq-fe.h... yes checking postgres.h usability... yes checking postgres.h presence... yes checking for postgres.h... yes checking for utils/typcache.h... yes checking for plpgsql.so... yes checking for postgresql.conf.sample... skipped due to override checking for PQputcopyData in -lpq... yes checking for PQsetNoticeReceiver in -lpq... yes checking for PQfreemem in -lpq... yes checking Postgresql for thread-safety... PQisthreadsafe() true checking for ScanKeywordLookup... yes,and it takes arguments checking for typenameTypeId... checking for typenameTypeId... yes,and it takes 2 arguments checking for GetActiveSnapshot... yes checking for ScanKeywordLookup... no checking for GetConfigOptionByName... checking for GetConfigOptionByName... yes,and it takes 2 arguments checking for set_config_option... yes,and it takes arguments yes,and it takes 8 arguments checking for set_config_option... checking for standard_conforming_strings... yes checking whether GetTopTransactionId is declared... yes checking for LookupExplicitNamespace 2 args... yes,and it takes 2 arguments checking for DBD::Pg... checking if you have requested documentation building... no configure: creating ./config.status config.status: creating Makefile.global config.status: creating GNUmakefile config.status: creating slony1.spec config.status: creating Makefile.port config.status: creating config.h [postgres@MysqL193 slony1-2.2.5]$ [postgres@MysqL193 slony1-2.2.5]$ [postgres@MysqL193 slony1-2.2.5]$ make make[1]: Entering directory `/usr/local/src/slony1-2.2.5/src' make[2]: Entering directory `/usr/local/src/slony1-2.2.5/src/parsestatements' gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I/usr/local/pgsql9.5.1/include/ -c -o test-scanner.o test-scanner.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I/usr/local/pgsql9.5.1/include/ -c -o scanner.o scanner.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -o test-scanner test-scanner.c scanner.o ./test-scanner < /dev/null > emptytestresult.log ./test-scanner < ./test_sql.sql > test_sql.log ./test-scanner < ./cstylecomments.sql > cstylecomments.log make[2]: Leaving directory `/usr/local/src/slony1-2.2.5/src/parsestatements' make[2]: Entering directory `/usr/local/src/slony1-2.2.5/src/slon' gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -pthread -I../.. -I../../src/slon -I/usr/local/pgsql9.5.1/include/ -c -o slon.o slon.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -pthread -I../.. -I../../src/slon -I/usr/local/pgsql9.5.1/include/ -c -o runtime_config.o runtime_config.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -pthread -I../.. -I../../src/slon -I/usr/local/pgsql9.5.1/include/ -c -o local_listen.o local_listen.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -pthread -I../.. -I../../src/slon -I/usr/local/pgsql9.5.1/include/ -c -o remote_listen.o remote_listen.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -pthread -I../.. -I../../src/slon -I/usr/local/pgsql9.5.1/include/ -c -o remote_worker.o remote_worker.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -pthread -I../.. -I../../src/slon -I/usr/local/pgsql9.5.1/include/ -c -o sync_thread.o sync_thread.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -pthread -I../.. -I../../src/slon -I/usr/local/pgsql9.5.1/include/ -c -o monitor_thread.o monitor_thread.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -pthread -I../.. -I../../src/slon -I/usr/local/pgsql9.5.1/include/ -c -o cleanup_thread.o cleanup_thread.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -pthread -I../.. -I../../src/slon -I/usr/local/pgsql9.5.1/include/ -c -o scheduler.o scheduler.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -pthread -I../.. -I../../src/slon -I/usr/local/pgsql9.5.1/include/ -c -o dbutils.o dbutils.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -pthread -I../.. -I../../src/slon -I/usr/local/pgsql9.5.1/include/ -c -o conf-file.o conf-file.c conf-file.l: In function ‘ProcessConfigFile’: conf-file.l:272: warning: label ‘cleanup_exit’ defined but not used conf-file.l: At top level: conf-file.c:1219: warning: ‘input’ defined but not used gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -pthread -I../.. -I../../src/slon -I/usr/local/pgsql9.5.1/include/ -c -o confoptions.o confoptions.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -pthread -I../.. -I../../src/slon -I/usr/local/pgsql9.5.1/include/ -c -o misc.o misc.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -pthread -I../.. -I../../src/slon -o slon slon.o runtime_config.o local_listen.o remote_listen.o remote_worker.o sync_thread.o monitor_thread.o cleanup_thread.o scheduler.o dbutils.o conf-file.o confoptions.o misc.o ../parsestatements/scanner.o -pthread -L/usr/local/pgsql9.5.1/lib/ -lpq -Wl,-rpath,/usr/local/pgsql9.5.1/lib/ make[2]: Leaving directory `/usr/local/src/slony1-2.2.5/src/slon' make[2]: Entering directory `/usr/local/src/slony1-2.2.5/src/slonik' gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I../.. -DPGSHARE="\"/usr/local/pgsql9.5.1/share/\"" -I/usr/local/pgsql9.5.1/include/ -c -o slonik.o slonik.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I../.. -DPGSHARE="\"/usr/local/pgsql9.5.1/share/\"" -I/usr/local/pgsql9.5.1/include/ -c -o dbutil.o dbutil.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I../.. -DPGSHARE="\"/usr/local/pgsql9.5.1/share/\"" -I/usr/local/pgsql9.5.1/include/ -c -o parser.o parser.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I../.. -DPGSHARE="\"/usr/local/pgsql9.5.1/share/\"" -I/usr/local/pgsql9.5.1/include/ -c -o scan.o scan.c scan.c:2066: warning: ‘input’ defined but not used gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I../.. -DPGSHARE="\"/usr/local/pgsql9.5.1/share/\"" slonik.o dbutil.o parser.o ../parsestatements/scanner.o scan.o -L/usr/local/pgsql9.5.1/lib/ -lpq -Wl,/usr/local/pgsql9.5.1/lib/ -o slonik make[2]: Leaving directory `/usr/local/src/slony1-2.2.5/src/slonik' make[2]: Entering directory `/usr/local/src/slony1-2.2.5/src/backend' cp ../misc/avl_tree.c avl_tree.c cp ../misc/avl_tree.h avl_tree.h gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I../.. -fpic -I/usr/local/pgsql9.5.1/include/server/ -c -o slony1_funcs.o slony1_funcs.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I../.. -fpic -L/usr/local/pgsql9.5.1/lib/ -lpq -Wl,/usr/local/pgsql9.5.1/lib/ -shared -o slony1_funcs.2.2.5.so slony1_funcs.o make[2]: Leaving directory `/usr/local/src/slony1-2.2.5/src/backend' make[2]: Entering directory `/usr/local/src/slony1-2.2.5/src/ducttape' make[2]: Leaving directory `/usr/local/src/slony1-2.2.5/src/ducttape' make[2]: Entering directory `/usr/local/src/slony1-2.2.5/src/slony_logshipper' gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I../.. -DPGSHARE="\"/usr/local/pgsql9.5.1/share/\"" -I/usr/local/pgsql9.5.1/include/ -c -o slony_logshipper.o slony_logshipper.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I../.. -DPGSHARE="\"/usr/local/pgsql9.5.1/share/\"" -I/usr/local/pgsql9.5.1/include/ -c -o dbutil.o dbutil.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I../.. -DPGSHARE="\"/usr/local/pgsql9.5.1/share/\"" -I/usr/local/pgsql9.5.1/include/ -c -o ipcutil.o ipcutil.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I../.. -DPGSHARE="\"/usr/local/pgsql9.5.1/share/\"" -I/usr/local/pgsql9.5.1/include/ -c -o parser.o parser.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I../.. -DPGSHARE="\"/usr/local/pgsql9.5.1/share/\"" -I/usr/local/pgsql9.5.1/include/ -c -o scan.o scan.c gcc -g -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I../.. -DPGSHARE="\"/usr/local/pgsql9.5.1/share/\"" slony_logshipper.o dbutil.o ipcutil.o parser.o ../parsestatements/scanner.o scan.o -L/usr/local/pgsql9.5.1/lib/ -lpq -Wl,/usr/local/pgsql9.5.1/lib/ -o slony_logshipper make[2]: Leaving directory `/usr/local/src/slony1-2.2.5/src/slony_logshipper' make[1]: Leaving directory `/usr/local/src/slony1-2.2.5/src' make[1]: Entering directory `/usr/local/src/slony1-2.2.5/tools' for subdir in altperl ; do \ make -C $subdir all || exit; \ done make[2]: Entering directory `/usr/local/src/slony1-2.2.5/tools/altperl' make[2]: Leaving directory `/usr/local/src/slony1-2.2.5/tools/altperl' make[1]: Leaving directory `/usr/local/src/slony1-2.2.5/tools' All of Slony-I is successfully made. Ready to install [postgres@MysqL193 slony1-2.2.5]$ [root@MysqL193 slony1-2.2.5]# [root@MysqL193 slony1-2.2.5]# make install make[1]: Entering directory `/usr/local/src/slony1-2.2.5/src' make[2]: Entering directory `/usr/local/src/slony1-2.2.5/src/parsestatements' make[2]: nothing to be done for `install'. make[2]: Leaving directory `/usr/local/src/slony1-2.2.5/src/parsestatements' make[2]: Entering directory `/usr/local/src/slony1-2.2.5/src/slon' /bin/sh /usr/local/src/slony1-2.2.5/config/mkinstalldirs /usr/local/pgsql9.5.1/bin/ /bin/sh /usr/local/src/slony1-2.2.5/config/install-sh -c -m 755 slon /usr/local/pgsql9.5.1/bin/ make[2]: Leaving directory `/usr/local/src/slony1-2.2.5/src/slon' make[2]: Entering directory `/usr/local/src/slony1-2.2.5/src/slonik' /bin/sh /usr/local/src/slony1-2.2.5/config/mkinstalldirs /usr/local/pgsql9.5.1/bin/ /bin/sh /usr/local/src/slony1-2.2.5/config/install-sh -c -m 755 slonik /usr/local/pgsql9.5.1/bin/ make[2]: Leaving directory `/usr/local/src/slony1-2.2.5/src/slonik' make[2]: Entering directory `/usr/local/src/slony1-2.2.5/src/backend' /bin/sh /usr/local/src/slony1-2.2.5/config/mkinstalldirs /usr/local/pgsql9.5.1/lib/ /bin/sh /usr/local/src/slony1-2.2.5/config/mkinstalldirs /usr/local/pgsql9.5.1/share/ /bin/sh /usr/local/src/slony1-2.2.5/config/install-sh -c -m 755 slony1_funcs.2.2.5.so /usr/local/pgsql9.5.1/lib/ for file in slony1_base.sql slony1_funcs.sql slony1_base.v83.sql slony1_base.v84.sql slony1_funcs.v83.sql slony1_funcs.v84.sql; do \ /bin/sh /usr/local/src/slony1-2.2.5/config/install-sh -c -m 644 $file /usr/local/pgsql9.5.1/share//`basename $file .sql`.2.2.5.sql || exit ; \ done make[2]: Leaving directory `/usr/local/src/slony1-2.2.5/src/backend' make[2]: Entering directory `/usr/local/src/slony1-2.2.5/src/ducttape' /bin/sh /usr/local/src/slony1-2.2.5/config/mkinstalldirs make[2]: Leaving directory `/usr/local/src/slony1-2.2.5/src/ducttape' make[2]: Entering directory `/usr/local/src/slony1-2.2.5/src/slony_logshipper' /bin/sh /usr/local/src/slony1-2.2.5/config/mkinstalldirs /usr/local/pgsql9.5.1/bin/ /bin/sh /usr/local/src/slony1-2.2.5/config/install-sh -c -m 755 slony_logshipper /usr/local/pgsql9.5.1/bin/ make[2]: Leaving directory `/usr/local/src/slony1-2.2.5/src/slony_logshipper' make[1]: Leaving directory `/usr/local/src/slony1-2.2.5/src' make[1]: Entering directory `/usr/local/src/slony1-2.2.5/tools' for subdir in altperl ; do \ make -C $subdir install || exit; \ done make[2]: Entering directory `/usr/local/src/slony1-2.2.5/tools/altperl' /bin/sh /usr/local/src/slony1-2.2.5/config/mkinstalldirs /usr/local/etc /bin/sh /usr/local/src/slony1-2.2.5/config/mkinstalldirs /usr/local/pgsql9.5.1/lib/ /bin/sh /usr/local/src/slony1-2.2.5/config/mkinstalldirs /usr/local/bin /bin/sh /usr/local/src/slony1-2.2.5/config/install-sh -c -m 644 slon_tools.conf-sample /usr/local/etc /bin/sh /usr/local/src/slony1-2.2.5/config/install-sh -c -m 644 slon-tools /usr/local/pgsql9.5.1/lib//slon-tools.pm for file in slonik_add_node.pl slonik_build_env.pl slonik_create_set.pl slonik_drop_node.pl slonik_drop_sequence.pl slonik_drop_set.pl slonik_drop_table.pl slonik_execute_script.pl slonik_failover.pl slonik_init_cluster.pl slonik_merge_sets.pl slonik_move_set.pl slonik_print_preamble.pl slonik_restart_node.pl slonik_store_node.pl slonik_subscribe_set.pl slonik_uninstall_nodes.pl slonik_unsubscribe_set.pl slonik_update_nodes.pl slon_kill.pl slon_start.pl slon_status.pl slon_watchdog2.pl slon_watchdog.pl slony_show_configuration.pl ; do \ tmpname=`echo $file | sed "s#\.pl##"` && \ /bin/sh /usr/local/src/slony1-2.2.5/config/install-sh -c -m 755 $tmpname /usr/local/bin \ || exit; \ done make[2]: Leaving directory `/usr/local/src/slony1-2.2.5/tools/altperl' make[1]: Leaving directory `/usr/local/src/slony1-2.2.5/tools' All of Slony-I is successfully installed [root@MysqL193 slony1-2.2.5]# [root@MysqL193 slony1-2.2.5]# '
结果验证为：
[postgres@MysqL193 slony1-2.2.5]$ which postgres /usr/local/pgsql/bin/postgres [postgres@MysqL193 slony1-2.2.5]$ which slon /usr/local/pgsql/bin/slon [postgres@MysqL193 slony1-2.2.5]$ which slonik /usr/local/pgsql/bin/slonik [postgres@MysqL193 slony1-2.2.5]$ [root@MysqL193 slony1-2.2.5]# chown -R postgres:postgres /usr/local/pgsql/ [root@MysqL193 slony1-2.2.5]# [root@MysqL193 slony1-2.2.5]# ll /usr/local/pgsql/bin/postgres -rwxr-xr-x 1 postgres postgres 6703495 Mar 16 2016 /usr/local/pgsql/bin/postgres [root@MysqL193 slony1-2.2.5]# ll /usr/local/pgsql/bin/slon -rwxr-xr-x 1 postgres postgres 389518 Nov 19 10:29 /usr/local/pgsql/bin/slon [root@MysqL193 slony1-2.2.5]# ll /usr/local/pgsql/bin/slonik -rwxr-xr-x 1 postgres postgres 274680 Nov 19 10:29 /usr/local/pgsql/bin/slonik [root@MysqL193 slony1-2.2.5]#
############################
第三部分 配置和验证Slony-I复制
步骤一：规划和创建复制环境：
进行复制的两个postgresql的实例端口和库名分别如下：
192.168.10.119 ： 5432 master
192.168.10.119 ： 5433 slave
create user slony superuser password 'slonytest';
psql -h 192.168.10.119 -p 5432 postgres postgres
create database master;
alter database master owner to slony;
psql -h 192.168.10.119 -p 5433 postgres postgres
create database slave;
alter database slave owner to slony;
create table synctab01(id int primary key,note text);
host all all 192.168.1.0/24 md5
为了让备注生效，运行如下命令：
pg_ctl reload
listen_addresses = '*'
psql -h 192.168.10.119 -p 5432 -U slony -d master
psql -h 192.168.10.119 -p 5433 -U slony -d slave
如果验证都能够正常访问，则到此，复制前的postgresql环境准备就结束了。
接下来使用 altperl scripts 脚本完成Slony数据同步的配置工作。
步骤二：编辑 slon_tools.conf 配置文件
cd /usr/local/etc
ls
cp slon_tools.conf-sample slon_tools.conf
vim slon_tools.conf
if ($ENV{"SLONYNODES"}) {
require $ENV{"SLONYNODES"};
} else {
#$CLUSTER_NAME = 'replication';
$CLUSTER_NAME = 'cluster01';
#$PIDFILE_DIR = '/var/run/slony1';
$PIDFILE_DIR = '/usr/local/pgsql/log';
#$LOGDIR = '/var/log/slony1';
$LOGDIR = '/usr/local/pgsql/log';
#目前只有两个主从复制，只需要配置两个服务器即可
add_node(node => 1,host => '192.168.10.119',dbname => 'master',port => 5432,user => 'slony',password => 'slonytest');
add_node(node => 2,dbname => 'slave',port => 5433,password => 'slonytest');
}
# 设置复制集的配置项，主要配置要同步那些表和序列。
$SLONY_SETS = {
"set1_name" => {
"set_id" => 1,"table_id" => 1,"sequence_id" => 1,"pkeyedtables" => ["synctab01"],"keyedtables" => {},"sequences" => [],},};
# 上面的集群名称、日志路径、复制集中的同步主键表、唯一键表、序列等配置完成后，将 slon_tools.conf 文件拷贝到其他机器上。初始化集群。
if ($ENV{"SLONYNODES"}) {
require $ENV{"SLONYNODES"};
} else {
#$CLUSTER_NAME = 'replication';
$CLUSTER_NAME = 'cluster01';
#$PIDFILE_DIR = '/var/run/slony1';
$PIDFILE_DIR = '/usr/local/pgsql/log';
#$LOGDIR = '/var/log/slony1';
$LOGDIR = '/usr/local/pgsql/log';
#目前只有两个主从复制，只需要配置两个服务器即可
add_node(node => 1,
host => '192.168.10.119',
dbname => 'master',
port => 5432,
user => 'slony',
password => 'slonytest');
add_node(node => 2,
dbname => 'slave',
port => 5433,
password => 'slonytest');
}
# 设置复制集的配置项，主要配置要同步那些表和序列。
$SLONY_SETS = {
"set1_name" => {
"set_id" => 1,
"table_id" => 1,
"sequence_id" => 1,
"pkeyedtables" => ["synctab01"],
"keyedtables" => {},
"sequences" => [],
},
};
scp slon_tools.conf 192.168.10.119:`pwd`/.
步骤三：启动同步服务
slony配置文件配置完毕，并拷贝到集群中各个节点后，需要初始化和启动同步服务。
初始化集群，执行 slonik_init_cluster | slonik 命令如下：
[postgres@MysqL193 etc]$
slonik_init_cluster | slonik
<stdin>:10: Set up replication nodes
<stdin>:13: Next: configure paths for each node/origin
<stdin>:16: Replication nodes prepared
<stdin>:17: Please start a slon replication daemon for each node
[postgres@MysqL193 etc]$
命令 slonik_init_cluster 会读取配置文件 slon_tools.conf 中的内容，自动初始化 slony集群在数据库中的同步配置。后面一些 slony脚本也会读取配置文件 slon_tools.conf。
在master节点上，启动 slony 守护进程，命令后的序号对应配置文件中master节点的节点号。
[postgres@MysqL193 etc]$
slon_start 1
Invoke slon for node 1 - /usr/local/pgsql9.5.1/bin//slon -p /var/run/slony1/cluster01_node1.pid -s 1000 -d2 cluster01 'host=192.168.10.119 dbname=master user=slony port=5432 password=slonytest' > /usr/local/pgsql/log/node1/master-2016-11-19.log 2>&1 &
Slon Failed to start for cluster cluster01,node node1
[postgres@MysqL193 etc]$
slon_start 1
Invoke slon for node 1 - /usr/local/pgsql9.5.1/bin//slon -p /usr/local/pgsql/log/cluster01_node1.pid -s 1000 -d2 cluster01 'host=192.168.10.119 dbname=master user=slony port=5432 password=slonytest' > /usr/local/pgsql/log/node1/master-2016-11-19.log 2>&1 &
Slon successfully started for cluster cluster01,node node1
PID [11298]
Start the watchdog process as well...
在slave节点上，启动 slony守护进程，命令后的序号对应配置文件中 slave 节点的节点号。
[postgres@MysqL193 etc]$
slon_start 2
Invoke slon for node 2 - /usr/local/pgsql9.5.1/bin//slon -p /var/run/slony1/cluster01_node2.pid -s 1000 -d2 cluster01 'host=192.168.10.119 dbname=slave user=slony port=5433 password=slonytest' > /usr/local/pgsql/log/node2/slave-2016-11-19.log 2>&1 &
Slon Failed to start for cluster cluster01,node node2
再次启动：
[postgres@MysqL193 etc]$
slon_start 2
Invoke slon for node 2 - /usr/local/pgsql9.5.1/bin//slon -p /usr/local/pgsql/log/cluster01_node2.pid -s 1000 -d2 cluster01 'host=192.168.10.119 dbname=slave user=slony port=5433 password=slonytest' > /usr/local/pgsql/log/node2/slave-2016-11-19.log 2>&1 &
Slon successfully started for cluster cluster01,node node2
PID [11323]
Start the watchdog process as well...
启动slony守护进程时的错误处理：
2016-11-19 11:51:41 CST CONfig main: slon version 2.2.5 starting up
2016-11-19 11:51:41 CST FATAL Cannot open pid_file "/var/run/slony1/cluster01_node1.pid"
再次启动，就可以正常启动了。
使用命令 “ slonik_create_set 1 | slonik ” 创建数据集，如下：
[postgres@MysqL193 etc]$
slonik_create_set 1 | slonik
<stdin>:11: Subscription set 1 (set1_name) created
<stdin>:12: Adding tables to the subscription set
<stdin>:16: Add primary keyed table public.synctab01
<stdin>:19: Adding sequences to the subscription set
<stdin>:20: All tables added
[postgres@MysqL193 etc]$
[postgres@MysqL193 etc]$
slonik_subscribe_set 1 2 | slonik
<stdin>:6: Subscribed nodes to set 1
到此，同步就配置完了。
步骤四：验证同步效果
下面测试同步效果。
在master主库上添加一条记录： postgres=# \c master You are Now connected to database "master" as user "postgres". master=# \d List of relations Schema | Name | Type | Owner --------+-----------+-------+---------- public | synctab01 | table | postgres (1 row) master=# master=# select * from synctab01; id | note ----+------ (0 rows) master=# master=# insert into synctab01 values(1,'111'); INSERT 0 1 master=# master=# select * from synctab01; id | note ----+------ 1 | 111 (1 row) 在slave从库上确认数据状态： postgres=# \c slave You are Now connected to database "slave" as user "postgres". slave=# slave=# \d List of relations Schema | Name | Type | Owner --------+-----------+-------+---------- public | synctab01 | table | postgres (1 row) slave=# slave=# select * from synctab01; id | note ----+------ (0 rows) slave=# select * from synctab01; id | note ----+------ 1 | 111 (1 row)
在master主库上添加一条记录：
postgres=#
\c master
You are Now connected to database "master" as user "postgres".
master=#
\d
List of relations
Schema | Name | Type | Owner
--------+-----------+-------+----------
public | synctab01 | table | postgres
(1 row)
master=#
master=#
select * from synctab01;
id | note
----+------
(0 rows)
master=#
master=#
insert into synctab01 values(1,'111');
INSERT 0 1
master=#
master=#
select * from synctab01;
id | note
----+------
1 | 111
(1 row)
在slave从库上确认数据状态：
postgres=#
\c slave
You are Now connected to database "slave" as user "postgres".
slave=#
slave=#
\d
List of relations
Schema | Name | Type | Owner
--------+-----------+-------+----------
public | synctab01 | table | postgres
(1 row)
slave=#
slave=#
select * from synctab01;
id | note
----+------
(0 rows)
slave=#
select * from synctab01;
id | note
----+------
1 | 111
(1 row)
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