init

.gitignore

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+.env

Dockerfile

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+FROM docker.pblr-nyk.pro/postgres:16.4-bullseye
+COPY reppoint /reppoint
+RUN chmod +x /reppoint
+ENTRYPOINT ["/reppoint"]
+CMD []

README

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+Делает полную копию бд посгресса в оперативку или любое другое место.
+
+Че добавить на реплике:
+-> .env
+MASTER_ADDRESS=x.x.x.x #Ип бд
+MASTER_USER=user #Юзер для реплики
+TZ=Europe/Moscow #Я русский
+
+Че добавить на мастере:
+wal_level = hot_standby
+archive_mode = on
+archive_command = 'cd .'
+max_wal_senders = 8
+hot_standby = on

docker-compose.yaml

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+services:
+  postgres_db_mem_rep:
+    build: ./
+    container_name: postgress_db_mem_replica
+    #restart: unless-stopped
+    env_file: .env
+    tmpfs:
+      - /var/lib/postgresql/data
+    ports:
+      - 5442:5432
+    deploy:
+      resources:
+        limits:
+          cpus: "4.0"
+          memory: 16G
+#    networks:
+#      - postgres_db_default
+#networks:
+#  postgres_db_default:
+#    external: true

reppoint

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+#!/bin/bash
+
+if [[ -z "${MASTER_ADDRESS}" ]]; then
+  echo "Cannot startup, need MASTER_ADDRESS"
+else
+  MASTER_ADDRESS="${MASTER_ADDRESS}"
+  echo "copy from ${MASTER_ADDRESS}"
+fi
+
+echo "init default scripts"
+export POSTGRES_PASSWORD="replica"
+docker-entrypoint.sh postgres -v
+
+echo "add user"
+#add replication user
+cat <<EOT >> /var/lib/postgresql/data/pg_hba.conf
+host    replication        postgres    $MASTER_ADDRESS/24        trust
+host	all	all	all	md5
+EOT
+
+echo "add replica rules"
+#add replica rules
+cat <<EOT >> /var/lib/postgresql/data/postgresql.conf
+listen_addresses = '*'
+wal_level = hot_standby
+archive_mode = on
+archive_command = 'cd .'
+max_wal_senders = 8
+hot_standby = on
+max_connections = 1000
+EOT
+
+#create copy
+mkdir /tmp/pg_copy
+cp /var/lib/postgresql/data/*.conf /tmp/pg_copy
+echo "copy from master"
+rm -rf /var/lib/postgresql/data
+mkdir /var/lib/postgresql/data
+pg_basebackup -v -P -R -X stream -c fast -h ${MASTER_ADDRESS} -U ${MASTER_USER} -D /var/lib/postgresql/data
+rm /var/lib/postgresql/data/*.conf
+cp /tmp/pg_copy/*.conf /var/lib/postgresql/data/
+chown postgres:postgres -R /var/lib/postgresql/data
+
+echo "run postgres"
+#run postgres
+docker-entrypoint.sh postgres