pgsql备份还原测试

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前提：已配置好docker-compose

说明: pgsql服务已通过容器方式部署，在centos服务器上安装pgsql主要是使用pg_dump命令

安装pgsql测试环境一（模拟生产环境已经安装了pgsql）

创建目录

mkdir -p /data/docker
mkdir -p /data/pgsql/{data,bak,script}

容器docker-compose方式安装：

~]# cat /data/docker/docker-compose.yaml
version: "3.7"
services:
  pgsql:
    container_name: pgsql
    image: postgres:latest
    privileged: true
    environment:
      POSTGRES_PASSWORD: password
      POSTGRES_USER: postgres
      POSTGRES_DB: postgres
      TZ: Asia/Shanghai
    ports:
      - 5432:5432
    volumes:
      - /data/pgsql/data:/var/lib/postgresql/data
    restart: always

启动

docker]# docker-compose up -d

容器内操作

docker]# docker exec -it pgsql /bin/bash
root@ae06c41c4223:/# su -l postgres
postgres@ae06c41c4223:~$ psql
psql (14.1 (Debian 14.1-1.pgdg110+1))
Type "help" for help.
postgres=# 

修改密码

配置密码
postgres=# alter user postgres password '123456';
ALTER ROLE

创建表，导入一些测试数据

postgres=# CREATE DATABASE runoobdb;

postgres=# \c runoobdb

runoobdb=# CREATE TABLE COMPANY(
   ID INT PRIMARY KEY     NOT NULL,
   NAME           TEXT    NOT NULL,
   AGE            INT     NOT NULL,
   ADDRESS        CHAR(50),
   SALARY         REAL,
   JOIN_DATE      DATE
);

runoobdb=# INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY,JOIN_DATE) VALUES (4, 'Mark', 25, 'Rich-Mond ', 65000.00, '2007-12-13' ),

(5, 'David', 27, 'Texas', 85000.00, '2007-12-13');

安装pgsql测试环境二（使用pg_dump命令）

下载安装

~]# wget https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm
~]# rpm -ivh pgdg-redhat-repo-latest.noarch.rpm
~]# yum install -y postgresql14

备份脚本

script]# cat /data/pgsql/script/bak_full_db.sh 
#!/bin/bash
date_now=`date +%Y%m%d-%H%M%S`
dbname=runoobdb
back_dir=/data/pgsql/bak
back_log_dir="./backup.log"
rmback_log_dir="./rmback.log"


export PGPASSWORD="123456"
#postgresql bakup
/usr/bin/pg_dump  -h 172.20.0.2 -p 5432 -U postgres $dbname >$back_dir/$dbname-$date_now.out
if [ $? = 0 ];then
  echo "$date_now postgresql backup success" >>$back_log_dir
  echo "" >> $back_log_dir
else
  echo "$date_now postgresql backup failed" >> $back_log_dir
  echo "" >>$back_log_dir
fi

#rm back files
find $back_dir -mtime +8 -exec rm -fr {} \;
if [ $? = 0 ];then
  echo "$date_now rm backup files successful">>$rmback_log_dir
  echo "" >>$rmback_log_dir
else
  echo "$date_now rm backup files failed">>$rmback_log_dir
  echo "" >>$rmback_log_dir
fi

备份任务计划

* * * * * /data/pgsql/script/bak_full_db.sh

查看备份情况

还原测试

删除表

runoobdb=# \d
          List of relations
 Schema |  Name   | Type  |  Owner   
--------+---------+-------+----------
 public | company | table | postgres
(1 row)

runoobdb=# drop table company;                                                                                                     
DROP TABLE
runoobdb=# \d
Did not find any relations.
runoobdb=# 

删除库

runoobdb=# \l      
                                 List of databases
   Name    |  Owner   | Encoding |  Collate   |   Ctype    |   Access privileges   
-----------+----------+----------+------------+------------+-----------------------
 dbname    | postgres | UTF8     | en_US.utf8 | en_US.utf8 | 
 postgres  | postgres | UTF8     | en_US.utf8 | en_US.utf8 | 
 runoobdb  | postgres | UTF8     | en_US.utf8 | en_US.utf8 | 
 template0 | postgres | UTF8     | en_US.utf8 | en_US.utf8 | =c/postgres          +
           |          |          |            |            | postgres=CTc/postgres
 template1 | postgres | UTF8     | en_US.utf8 | en_US.utf8 | =c/postgres          +
           |          |          |            |            | postgres=CTc/postgres
(5 rows)

runoobdb=# \c postgres
You are now connected to database "postgres" as user "postgres".
postgres=# drop database runoobdb ;
DROP DATABASE
postgres=# \l
                                 List of databases
   Name    |  Owner   | Encoding |  Collate   |   Ctype    |   Access privileges   
-----------+----------+----------+------------+------------+-----------------------
 dbname    | postgres | UTF8     | en_US.utf8 | en_US.utf8 | 
 postgres  | postgres | UTF8     | en_US.utf8 | en_US.utf8 | 
 template0 | postgres | UTF8     | en_US.utf8 | en_US.utf8 | =c/postgres          +
           |          |          |            |            | postgres=CTc/postgres
 template1 | postgres | UTF8     | en_US.utf8 | en_US.utf8 | =c/postgres          +
           |          |          |            |            | postgres=CTc/postgres
(4 rows)

postgres=# 

创建库

postgres=# create database runoobdb;
CREATE DATABASE

还原

[root@localhost bak]# psql -h 172.20.0.2 -p 5432 -U postgres -W -d runoobdb < runoobdb-20220618-105902.out
口令: 
SET
SET
SET
SET
SET
 set_config 
------------
 
(1 行记录)

SET
SET
SET
SET
SET
SET
CREATE TABLE
ALTER TABLE
COPY 3
ALTER TABLE

查看数据

postgres=# \c runoobdb;
You are now connected to database "runoobdb" as user "postgres".
runoobdb=# \d
          List of relations
 Schema |  Name   | Type  |  Owner   
--------+---------+-------+----------
 public | company | table | postgres
(1 row)

runoobdb=# select * from company;
 id | name  | age |                      address                       | salary | join_date  
----+-------+-----+----------------------------------------------------+--------+------------
  1 | Paul  |  32 | California                                         |  20000 | 2001-07-13
  4 | Mark  |  25 | Rich-Mond                                          |  65000 | 2007-12-13
  5 | David |  27 | Texas                                              |  85000 | 2007-12-13
(3 rows)

参考文档

备份还原参考
http://t.zoukankan.com/shuaixf-p-2695245.html
安装参考
https://blog.csdn.net/qq_39626154/article/details/121029620
https://www.runoob.com/postgresql/postgresql-tutorial.html
yum仓库包配置查找
https://yum.postgresql.org/repopackages/

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