update

pgsql/Demo/SingleNode/pgsql/conf.d/xxxx.conf.example

@@ -0,0 +1,2 @@
+listen_addresses = '*'
+

pgsql/Demo/SingleNode/pgsql/my.cnf

@@ -1,19 +0,0 @@
-[mysqld]
-mysqlx = OFF
-skip-name-resolve = 1
-max-user-connections = 600
-
-## this should be less than 80% of total memory
-innodb-buffer-pool-size = xxxxG
-
-## this should be half of "innodb-buffer-pool-size"
-innodb-buffer-pool-instances = xxxx
-
-# binlog
-server-id = 1
-log-bin = /var/lib/mysql-bin/master
-binlog-format = ROW
-binlog-expire-logs-seconds = 172800
-gtid-mode = ON
-enforce-gtid-consistency = TRUE
-

pgsql/Demo/StreamReplication/README.md

@@ -0,0 +1,109 @@
+# 部署 PostgreSQL 流复制
+
+- 按实际环境修改
+    - docker-compose.yml
+    - pgsql1/conf.d/\*.cnf
+    - pgsql2/conf.d/\*.cnf
+
+- 创建目录
+    ```
+    grep '\<source:' docker-compose.yml | cut -d: -f2 | xargs mkdir -p
+    ```
+
+- 启动
+    ```
+    docker-compose up -d
+    ```
+
+- 查看日志，直至出现 "PGSQL is ready for connections."
+    ```
+    docker-compose logs pgsql1
+    docker-compose logs pgsql2
+    ```
+
+- 登录 pgsql1 数据库，创建测试表，写入测试数据
+    ```
+    docker exec -u postgres pgsql1 \
+        psql -c "create table t1(id int, name varchar)"
+    docker exec -u postgres pgsql1 \
+        psql -c "insert into t1 values (1, 'aa'),(2, 'bb')"
+    ```
+
+- 登录 pgsql1 数据库，创建同步用户，配置权限
+    ```
+    docker exec -u postgres pgsql1 \
+        psql -c "create user replicator login replication password 'Replicator_1234'"
+    docker exec -u postgres pgsql1 \
+        echo 'host replication replicator pgsql2 trust' >> pgsql1/db/pg_hba.conf
+    #docker exec -u postgres pgsql1 pg_ctl reload
+    ```
+
+- 增加主库配置
+    ```
+    echo '
+wal_level = hot_standby
+max_wal_senders = 8
+wal_keep_size = 512
+wal_sender_timeout = 60s
+max_connections = 100
+' > pgsql1/conf.d/replication.conf
+
+- 重启 pgsql1 数据库
+    ```
+    docker-compose restart pgsql1
+    ```
+
+- 登录 pgsql2 数据库，同步 pgsql1 的数据目录
+    ```
+    docker exec -u postgres pgsql2 mkdir -p /var/log/pgsql/db_pg1
+    docker exec -u postgres pgsql2 \
+        pg_basebackup \
+            -h pgsql1 \
+            -D /var/log/pgsql/db_pg1 \
+            -p 5432 \
+            -U replicator \
+            -Fp -Xs -P -c fast
+    ```
+
+- 停止并删除 pgsql2 容器，替换其数据目录，**注意数据目录权限**
+    ```
+    docker-compose stop pgsql2
+    docker-compose rm -f pgsql2
+    rm -rf pgsql2/db
+    mv pgsql2/log/db_pg1 pgsql2/db
+    chmod 0750 pgsql2/db
+    ```
+
+- 增加从库配置
+    ```
+    echo '
+primary_conninfo = 'host=pgsql1 port=5432 user=replicator'
+recovery_target_timeline = latest
+hot_standby = on
+max_standby_streaming_delay = 30s
+wal_receiver_status_interval = 10s
+hot_standby_feedback = on
+max_connections = 200
+max_worker_processes = 20
+' > pgsql2/conf.d/replication.conf
+    ```
+
+- 启动 pgsql2 数据库
+    ```
+    docker-compose up -d pgsql2
+    ```
+
+- 登录 pgsql1 数据库，查看从库信息
+    ```
+    docker exec -u postgres pgsql1 \
+        psql -c "select
+            client_addr,
+            usename,
+            backend_start,
+            application_name,
+            sync_state,
+            sync_priority
+            FROM pg_stat_replication;"
+    # 在 pgsql1 里创建数据库、表或更改数据，在 pgsql2 里可以看到
+    ```
+

pgsql/Demo/StreamReplication/docker-compose.yml

@@ -0,0 +1,39 @@
+version: "3.7"
+
+services:
+  pgsql1:
+    image: harbor.colben.cn/general/pgsql:15
+    container_name: pgsql1
+    restart: "on-failure"
+    stop_grace_period: 32s
+    networks:
+      pgsql:
+    volumes:
+    - type: bind
+      source: ./pgsql1/db
+      target: /var/lib/pgsql/
+    - type: bind
+      source: ./pgsql1/conf.d
+      target: /etc/pgsql/conf.d
+    - type: bind
+      source: ./pgsql1/log
+      target: /var/log/pgsql
+
+  pgsql2:
+    image: harbor.colben.cn/general/pgsql:15
+    container_name: pgsql2
+    restart: "on-failure"
+    stop_grace_period: 32s
+    networks:
+      pgsql:
+    volumes:
+    - type: bind
+      source: ./pgsql2/db
+      target: /var/lib/pgsql/
+    - type: bind
+      source: ./pgsql2/conf.d
+      target: /etc/pgsql/conf.d
+    - type: bind
+      source: ./pgsql2/log
+      target: /var/log/pgsql
+

pgsql/Demo/StreamReplication/pgsql1/conf.d/server.conf

@@ -0,0 +1,2 @@
+listen_addresses = '*'
+

pgsql/Dockerfile

@@ -41,6 +41,7 @@ include = 'fixed-parameters.conf'\n\
 data_directory = '/var/lib/pgsql'\n\
 hba_file = '/var/lib/pgsql/pg_hba.conf'\n\
 ident_file = '/var/lib/pgsql/pg_ident.conf'\n\
+unix_socket_directories = '/tmp'\n\
 log_destination = 'stderr'\n\
 logging_collector = on\n\
 log_directory = '/var/log/pgsql'\n\

pgsql/README.md

@@ -13,4 +13,5 @@
 
 ## 案例
 - [Demo/SingleNode/](Demo/SingleNode/): 单节点
+- [Demo/StreamReplication/](Demo/StreamReplication/): 流复制