Windows 环境搭建 PostgreSQL 逻辑复制高可用架构数据库服务

# 安装Chocolatey包管理器
Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; Invoke-Expression ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))
 
# 使用Chocolatey安装PostgreSQL
choco install postgresql
 
# 安装PostGIS扩展
choco install postgis
 
# 配置PostgreSQL的recovery.conf实现逻辑复制
# 假设PostgreSQL数据目录为C:\PostgreSQL\data
cd 'C:\Program Files\PostgreSQL\13\data'
Copy-Item -Path 'C:\PostgreSQL\recovery.conf' -Destination 'C:\Program Files\PostgreSQL\13\data\recovery.conf'
 
# 修改PostgreSQL配置文件postgresql.conf以启用逻辑复制
(Get-Content 'C:\Program Files\PostgreSQL\13\data\postgresql.conf') -replace '#wal_level = minimal','wal_level = logical' | Set-Content 'C:\Program Files\PostgreSQL\13\data\postgresql.conf'
(Get-Content 'C:\Program Files\PostgreSQL\13\data\postgresql.conf') -replace '#max_wal_senders = 0','max_wal_senders = 3' | Set-Content 'C:\Program Files\PostgreSQL\13\data\postgresql.conf'
(Get-Content 'C:\Program Files\PostgreSQL\13\data\postgresql.conf') -replace '#max_replication_slots = 0','max_replication_slots = 3' | Set-Content 'C:\Program Files\PostgreSQL\13\data\postgresql.conf'
(Get-Content 'C:\Program Files\PostgreSQL\13\data\postgresql.conf') -replace '#max_logical_replication_workers = 0','max_logical_replication_workers = 2' | Set-Content 'C:\Program Files\PostgreSQL\13\data\postgresql.conf'
 
# 重启PostgreSQL服务以应用配置
Restart-Service postgresql
 
# 登录PostgreSQL并创建复制用户和复制槽位
psql -U postgres -c "CREATE ROLE replica LOGIN REPLICATION PASSWORD 'replica';"
psql -U postgres -c "SELECT * FROM pg_create_physical_replication_slot('slot_name');"

这个例子展示了如何在Windows环境下使用Chocolatey安装PostgreSQL，并配置其recovery.conf以启用逻辑复制。修改了PostgreSQL配置文件以允许足够的复制进程，并重启了服务以应用更改。最后，演示了如何在PostgreSQL中创建用于逻辑复制的角色和复制槽位。