Floitet-Patroni-Zookeeper-Part1

docker-compose-patroni.yml

version: "3.4"

networks:
    patroni_patroni: 
        external: true
services:
    patroni1:
        image: patroni-test
        networks: [ patroni_patroni ]
        ports:
            - 5441:5432
            - 8091:8091
        hostname: patroni1
        volumes:
          - /patroni1:/data/patroni
        environment:
            PATRONI_API_CONNECT_PORT: 8091
            REPLICATION_NAME: replicator 
            REPLICATION_PASS: replpass
            SU_NAME: postgres
            SU_PASS: supass
            POSTGRES_APP_ROLE_PASS: appass
        deploy:
          replicas: 1
          placement:
            constraints: [node.hostname == floitet]

    patroni2:
        image: patroni-test
        networks: [ patroni_patroni ]
        ports:
            - 5442:5432
            - 8092:8091
        hostname: patroni2
        volumes:
          - /patroni2:/data/patroni
        environment:
            PATRONI_API_CONNECT_PORT: 8091
            REPLICATION_NAME: replicator 
            REPLICATION_PASS: replpass
            SU_NAME: postgres
            SU_PASS: supass
            POSTGRES_APP_ROLE_PASS: appass
        deploy:
          replicas: 1
          placement:
            constraints: [node.hostname == floitet]


    patroni3:
        image: patroni-test
        networks: [ patroni_patroni ]
        ports:
            - 5443:5432
            - 8093:8091
        hostname: patroni3
        volumes:
          - /patroni3:/data/patroni
        environment:
            PATRONI_API_CONNECT_PORT: 8091
            REPLICATION_NAME: replicator 
            REPLICATION_PASS: replpass
            SU_NAME: postgres
            SU_PASS: supass
            POSTGRES_APP_ROLE_PASS: appass
        deploy:
          replicas: 1
          placement:
            constraints: [node.hostname == floitet]

docker-compose-zookeeper.yml

version: '3.7'

services:
  zoo1:
    image: zookeeper:3.4
    hostname: zoo1
    ports:
      - 2191:2181
    networks:
      - patroni
    environment:
      ZOO_MY_ID: 1
      ZOO_SERVERS: server.1=0.0.0.0:2888:3888 server.2=zoo2:2888:3888 server.3=zoo3:2888:3888
    deploy:
      replicas: 1
      placement:
        constraints:
          - node.hostname == floitet
      restart_policy:
        condition: any

  zoo2:
    image: zookeeper:3.4
    hostname: zoo2
    networks:
      - patroni
    ports:
      - 2192:2181
    environment:
      ZOO_MY_ID: 2
      ZOO_SERVERS: server.1=zoo1:2888:3888 server.2=0.0.0.0:2888:3888 server.3=zoo3:2888:3888
    deploy:
      replicas: 1
      placement:
        constraints:
          - node.hostname == floitet
      restart_policy:
        condition: any

  zoo3:
    image: zookeeper:3.4
    hostname: zoo3
    networks:
      - patroni
    ports:
      - 2193:2181
    environment:
      ZOO_MY_ID: 3
      ZOO_SERVERS: server.1=zoo1:2888:3888 server.2=zoo2:2888:3888 server.3=0.0.0.0:2888:3888
    deploy:
      replicas: 1
      placement:
        constraints:
          - node.hostname == floitet
      restart_policy:
        condition: any

networks:
  patroni:
    driver: overlay
    attachable: true

Dockerfile

FROM postgres:11 

RUN apt-get update -y\ 
    && apt-get install python3 python3-pip -y\
    && pip3 install --upgrade setuptools\
    && pip3 install psycopg2-binary \
    && pip3 install patroni[zookeeper] \
    && mkdir /data/patroni -p \
    && chown postgres:postgres /data/patroni \
    && chmod 700 /data/patroni 

COPY patroni.yml /etc/patroni.yml
COPY patroni-entrypoint.sh ./entrypoint.sh
USER postgres

ENTRYPOINT ["bin/sh", "/entrypoint.sh"]

patroni-entrypoint.sh

#!/bin/sh

readonly CONTAINER_IP=$(hostname --ip-address)
readonly CONTAINER_API_ADDR="${CONTAINER_IP}:${PATRONI_API_CONNECT_PORT}"
readonly CONTAINER_POSTGRE_ADDR="${CONTAINER_IP}:5432"

export PATRONI_NAME="${PATRONI_NAME:-$(hostname)}"
export PATRONI_RESTAPI_CONNECT_ADDRESS="$CONTAINER_API_ADDR"
export PATRONI_RESTAPI_LISTEN="$CONTAINER_API_ADDR"
export PATRONI_POSTGRESQL_CONNECT_ADDRESS="$CONTAINER_POSTGRE_ADDR"
export PATRONI_POSTGRESQL_LISTEN="$CONTAINER_POSTGRE_ADDR"
export PATRONI_REPLICATION_USERNAME="$REPLICATION_NAME"
export PATRONI_REPLICATION_PASSWORD="$REPLICATION_PASS"
export PATRONI_SUPERUSER_USERNAME="$SU_NAME"
export PATRONI_SUPERUSER_PASSWORD="$SU_PASS"
export PATRONI_approle_PASSWORD="$POSTGRES_APP_ROLE_PASS"
export PATRONI_approle_OPTIONS="${PATRONI_admin_OPTIONS:-createdb, createrole}"

exec /usr/local/bin/patroni /etc/patroni.yml

patroni.yml

scope: patroni
namespace: /service/

bootstrap:
    dcs:
        ttl: 30
        loop_wait: 10
        retry_timeout: 10
        maximum_lag_on_failover: 1048576
        postgresql:
            use_pg_rewind: true

    postgresql:
      use_pg_rewind: true

    initdb:
    - encoding: UTF8
    - data-checksums

    pg_hba:
    - host replication all all md5
    - host all all all md5

zookeeper:
  hosts: 
      - zoo1:2181
      - zoo2:2181
      - zoo3:2181

postgresql:
    data_dir: /data/patroni
    bin_dir: /usr/lib/postgresql/11/bin
    pgpass: /tmp/pgpass
    parameters:
        unix_socket_directories: '.'

tags:
    nofailover: false
    noloadbalance: false
    clonefrom: false
    nosync: false