内容简介：EDB 封装了演示这两个工具之前，我们首先创建两个EDB数据库实例。计划创建两个EDB实例，软件目录为
EDB 封装了 edbstart
和 edbstop
命令行 工具 用于启动和关闭 Linux 平台上多个 EDB实例，对于主机上部署了多个EDB实例的场景降低了维护工作量，RPM 安装方式不支持使用这两个脚本工具。
演示这两个工具之前，我们首先创建两个EDB数据库实例。
安装 EDB
计划创建两个EDB实例，软件目录为 /opt/edb
，端口分别为 5444、5445，数据目录分别为 /edbdata/5444/data
, /edbdata/5445/data
。
创建系统用户
创建操作系统用户，如下:
# groupadd enterprisedb # useradd -g enterprisedb enterprisedb # passwd enterprisedb
创建数据目录
创建两个数据目录，如下:
[root@pghost6 edb]# mkdir -p /edbdata/5444 [root@pghost6 edb]# mkdir -p /edbdata/5445 chown -R enterprisedb:enterprisedb /edbdata
定义安装配置文件
创建配置文件如下:
touch /opt/edb/config_edb.conf
给配置文件 /opt/edb/config_edb.conf
加入以下内容:
mode=unattended superpassword=xxxxxx prefix=/opt/edb datadir=/edbdata/5444/data xlogdir=/edbdata/5444/data/pg_wal serverport=5444
安装 EDB
执行安装脚本，如下:
/opt/soft_bak/edb-as10-server-10.5.12-1-linux-x64.run --optionfile /opt/edb/config_edb.conf
设置环境变量
安装完成后自动生成环境变量文件 /opt/edb/pgplus_env.sh
, 将脚本最后部分的环境变量加到系统用户 enterprisedb 环境变量文件 .bash_profile
中，如下:
export PATH=/opt/edb/bin:$PATH export EDBHOME=/opt/edb export PGDATA=/edbdata/5444/data export PGDATABASE=edb # export PGUSER=enterprisedb export PGPORT=5444 export PGLOCALEDIR=/opt/edb/share/locale
创建另一个EDB实例
使用 initdb
创建另外一个EDB实例，如下:
-bash-4.2$ /opt/edb/bin/initdb -D /edbdata/5445/data -E UTF8 --locale=C -U enterprisedb -W The files belonging to this database system will be owned by user "enterprisedb". This user must also own the server process. The database cluster will be initialized with locale "C". The default text search configuration will be set to "english". Data page checksums are disabled. Enter new superuser password: Enter it again: creating directory /edbdata/5445/data ... ok creating subdirectories ... ok selecting default max_connections ... 100 ...省略
修改此实例 postgresql.conf 的端口号等相关参数，之后启动这个实例，如下:
-bash-4.2$ pg_ctl start -D /edbdata/5445/data
查看进程，已经有了两个EDB实例，如下:
-bash-4.2$ ps -ef | grep post root 1232 1 0 2018 ? 00:00:19 /usr/libexec/postfix/master -w postfix 1240 1232 0 2018 ? 00:00:04 qmgr -l -t unix -u postfix 29277 1232 0 10:52 ? 00:00:00 pickup -l -t unix -u enterpr+ 29530 1 0 10:55 ? 00:00:00 /opt/edb/bin/edb-postgres -D /edbdata/5444/data enterpr+ 29531 29530 0 10:55 ? 00:00:00 postgres: logger process enterpr+ 29533 29530 0 10:55 ? 00:00:00 postgres: checkpointer process enterpr+ 29534 29530 0 10:55 ? 00:00:00 postgres: writer process enterpr+ 29535 29530 0 10:55 ? 00:00:00 postgres: wal writer process enterpr+ 29536 29530 0 10:55 ? 00:00:00 postgres: autovacuum launcher process enterpr+ 29537 29530 0 10:55 ? 00:00:00 postgres: stats collector process enterpr+ 29538 29530 0 10:55 ? 00:00:00 postgres: bgworker: dbms_aq launcher enterpr+ 29539 29530 0 10:55 ? 00:00:00 postgres: bgworker: logical replication launcher enterpr+ 32025 1 2 11:34 pts/1 00:00:00 /opt/edb/bin/edb-postgres -D /edbdata/5445/data enterpr+ 32027 32025 0 11:34 ? 00:00:00 postgres: checkpointer process enterpr+ 32028 32025 0 11:34 ? 00:00:00 postgres: writer process enterpr+ 32029 32025 0 11:34 ? 00:00:00 postgres: wal writer process enterpr+ 32030 32025 0 11:34 ? 00:00:00 postgres: autovacuum launcher process enterpr+ 32031 32025 0 11:34 ? 00:00:00 postgres: stats collector process enterpr+ 32032 32025 0 11:34 ? 00:00:00 postgres: bgworker: dbms_aq launcher enterpr+ 32033 32025 0 11:34 ? 00:00:00 postgres: bgworker: logical replication launcher enterpr+ 32043 32025 0 11:34 ? 00:00:00 postgres: bgworker: dbms_aq worker[postgres] idle enterpr+ 32045 32025 0 11:34 ? 00:00:00 postgres: bgworker: dbms_aq worker[edb] idle enterpr+ 32047 29021 0 11:34 pts/1 00:00:00 grep --color=auto post
关于 edbtab
配置文件 /etc/edbtab
用来定义主机上的多个 EDB 实例， edbstart
和 edbstop
脚本会读取 /etc/edbtab
文件内容并进行EDB实例的启停控制。
edbtab
文件位于软件安装目录 /opt/edb/scripts/server/autostart/
，将此文件复制到 ‘/etc/‘ 目录，如下:
-bash-4.2$ ll /opt/edb/scripts/server/autostart total 16 -rwxr-xr-x 1 enterprisedb enterprisedb 1344 Aug 17 14:09 edb_autostart drwxrwxr-x 3 enterprisedb enterprisedb 18 Jan 17 12:00 edbdata -rwxr-xr-x 1 enterprisedb enterprisedb 1481 Aug 17 14:09 edbstart -rwxr-xr-x 1 enterprisedb enterprisedb 1463 Aug 17 14:09 edbstop -rw-r--r-- 1 enterprisedb enterprisedb 369 Jan 17 11:43 edbtab [root@pghost6 autostart]# cp /opt/edb/scripts/server/autostart/edbtab /etc/
edbtab 文件包含 $EDB_HOME、$PGDATA、<N|Y>三个字段，用冒号分隔，每一行表示一个EDB数据库实例，如下:
# This file is used to automatically start EnterpriseDB clusters # at system boot time # # Format of entries: # # $EDB_HOME:$PGDATA:<N|Y> # # Example of usage: # # /opt/edb/as10:/opt/edb/as10/data:Y # # The 'Y' or 'N' indicate whether the cluster should or should not be # started upon system boot/shutdown # /opt/edb:/edbdata/5444/data:Y /opt/edb:/edbdata/5445/data:Y
这个文件很容易理解，文件的最后两行设置了EDB的两个实例。
关于 edbstart 脚本
edbstart
和 edbstop
文件也位于软件安装目录 /opt/edb/scripts/server/autostart/
。
edbstart
脚本内容如下:
#!/bin/sh
# EnterpriseDB cluster startup script
#
# This script will start all clusters listed the /etc/edbtab file
# that have a 'Y' indicating that the cluster should be started at
# system boot time.
# This script is meant to be run at boot time
# (called by /etc/init.d/edb_autostart) but can be run manually.
# If you choose to run this script manually, it will attemp to start all
# clusters with a 'Y' unless you provide a data directory as an argument:
# i.e ./edbstart /opt/edb/as9.6/data, in which case, only that
# cluster will be started.
startAll ()
{
# Retrieve all entries from edbtab
for ENTRY in `cat /etc/edbtab | grep -v '^[ \t]*\#' | egrep -v ':[nN][ \t]*'`
do
EDB_HOME=`echo $ENTRY | awk -F: '{print $1}'`
PGDATA=`echo $ENTRY | awk -F: '{print $2}'`
EDBLOG=$PGDATA/log/log.txt
printf "Starting ${EDB_HOME} (${PGDATA})...\n"
$EDB_HOME/bin/pg_ctl -D $PGDATA -W start >> $EDBLOG 2>&1
done
}
startOne ()
{
PGDATA=$1
# Retrieve entry from edbtab
ENTRY=`cat /etc/edbtab | grep "${PGDATA}"`
if [ -z $ENTRY ]; then
printf "Entry could not be found!"
exit 1
fi
# Extract components
EDB_HOME=`echo $ENTRY | awk -F: '{print $1}'`
EDBLOG=$PGDATA/log/log.txt
printf "Starting ${EDB_HOME} (${PGDATA})...\n"
$EDB_HOME/bin/pg_ctl -D $PGDATA -w start >> $EDBLOG 2>&1
}
main ()
{
if [ -z "$1" ]; then
startAll
else
startOne $1
fi
}
main $*
关于 edbstop 脚本
edbstop
脚本内容如下:
#!/bin/sh
# EnterpriseDB cluster shutdown script
#
# This script will stop clusters listed the /etc/edbtab file
# that have a 'Y' indicating that the cluster should be stopped at
# system shutdown.
# This script is meant to be run at system shutdown
# (called by /etc/init.d/edb_autostart) but can be run manually.
# If you choose to run this script manually, it will attemp to stop all
# clusters with a 'Y' unless you provide a data directory as an argument:
# i.e ./edbstop /opt/edb/as9.6/data, in which case, only that
# cluster will be stopped.
stopAll ()
{
# Retrieve all entries from edbtab
for ENTRY in `cat /etc/edbtab | grep -v '^[ \t]*\#' | egrep -v ':[nN][ \t]*'`
do
EDB_HOME=`echo $ENTRY | awk -F: '{print $1}'`
PGDATA=`echo $ENTRY | awk -F: '{print $2}'`
printf "Stopping ${EDB_HOME} (${PGDATA})...\n"
$EDB_HOME/bin/pg_ctl -D $PGDATA -w -m immediate stop
done
}
stopOne ()
{
PGDATA=$1
# Retrieve entry from edbtab
ENTRY=`cat /etc/edbtab | grep "${PGDATA}"`
if [ -z $ENTRY ]; then
printf "Entry could not be found!\n"
exit 1
fi
# Extract components
EDB_HOME=`echo $ENTRY | awk -F: '{print $1}'`
PGDATA=`echo $ENTRY | awk -F: '{print $2}'`
printf "Stopping ${EDB_HOME} (${PGDATA})...\n"
$EDB_HOME/bin/pg_ctl -D $PGDATA -w -m immediate stop
}
main ()
{
if [ -z "$1" ]; then
stopAll
else
stopOne $1
fi
}
main $*
验证
为了使用方便，将 edbstart
和 edbstop
复制到 $EDBHOME/bin
目录下，如下:
-bash-4.2$ cp /opt/edb/scripts/server/autostart/edbstart $EDBHOME/bin -bash-4.2$ cp /opt/edb/scripts/server/autostart/edbstop $EDBHOME/bin
启停主机上所有实例
两个脚本不接任何参数表示启动或停止主机上的所有实例。
关闭主机上所有EDB实例，如下:
-bash-4.2$ edbstop Stopping /opt/edb (/edbdata/5444/data)... waiting for server to shut down.... done server stopped Stopping /opt/edb (/edbdata/5445/data)... waiting for server to shut down.... done server stopped
启动主机上所有EDB实例,如下:
-bash-4.2$ edbstart Starting /opt/edb (/edbdata/5444/data)... Starting /opt/edb (/edbdata/5445/data)...
启停主机上指定实例
也可以关闭或启动指定实例，指定数据目录即可。
关闭主机上的 /edbdata/5444/data 实例，如下:
-bash-4.2$ edbstop /edbdata/5444/data Stopping /opt/edb (/edbdata/5444/data)... waiting for server to shut down.... done server stopped
启动主机上的 /edbdata/5444/data 实例，如下:
-bash-4.2$ edbstart /edbdata/5444/data Starting /opt/edb (/edbdata/5444/data)...
参考
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