zabbix-serverを構築するdocker-compose.ymlサンプル。パスワードとかは適当に変えること。docker-proxyを使用しています。

chg_agent_ip.rb

# -*- coding: utf-8 -*-
#
require 'file-tail'
require 'systemu'
# DockerホストをゲストのZabbixServerコンテナで監視する場合、サーバ再起動時やDocker再起動時IPが変わってしまい、Agentの接続が蹴られてしまいます。
# 本スクリプトは、DockerホストのZabbixAgentのログを監視し、接続拒否されたIPを正しいIPに修正してAgentを再起動します。
# RootユーザのCronに以下のように設定して、サーバ再起動時に起動、常駐するようにします。
# 
# @reboot /usr/bin/ruby /opt/foo/docker/zabbix/chg_agent_ip.rb >> /opt/foo/docker/zabbix/chgip.log
# 本スクリプトは、file-tailとsystemuのGemが必要です。別途インストールしてください。
#
# 検証環境
# Ubuntu 18.04.2
# Ruby 2.5.1p57
#

ZABBIX_AGENT_LOG = "/var/log/zabbix/zabbix_agentd.log"
ZABBIX_AGENT_CONF = "/etc/zabbix/zabbix_agentd.conf"
MATCH_KEY = " \\d{1,}:\\d{1,}:\\d{1,}\\.\\d{1,} failed to accept an incoming connection: connection from \"(\\d{1,}\\.\\d{1,}\\.\\d{1,}\\.\\d{1,})\" rejected, allowed hosts: \"(\\d{1,}\\.\\d{1,}\\.\\d{1,}\\.\\d{1,})\""

def chg_ip_and_restart_zabbix_agent(before_ip,after_ip)
  puts "exec cmd : "
  cmd = "/bin/sed -i -e \"s/#{before_ip}/#{after_ip}/g\" #{ZABBIX_AGENT_CONF}"
  puts cmd
  status, stdout, stderr = systemu cmd
  puts [status,stdout,stderr]
  cmd = "/bin/systemctl restart zabbix-agent.service"
  puts cmd
  status, stdout, stderr = systemu cmd
  puts [status,stdout,stderr]
  puts "end"
end

@before_ip = nil
@after_ip = nil

class ACCESS_DENY < StandardError; end

def chk_logfile
  begin
    File.open(ZABBIX_AGENT_LOG) do |log|
      log.extend(File::Tail)
      log.interval = 1
      log.backward(0)
      log.tail do |line|
        puts line
        if ip = line.match(/#{MATCH_KEY}/)
          puts "match!"
          @before_ip = ip[2]
          @after_ip = ip[1]
          puts "before_ip:#{@before_ip} after_ip:#{@after_ip}"
          raise ACCESS_DENY
        end
      end
    end
  rescue Errno::EACCES
    puts "Need to run ROOT User!"
  rescue ACCESS_DENY
    chg_ip_and_restart_zabbix_agent(@before_ip,@after_ip)
    chk_logfile
  end
end

# main
chk_logfile

docker-compose_backup.sh

#/bin/bash
#
# Cronで動かすときはPATHを設定すること。
#

get_contenner_service_name(){
        echo $1 | cut -d"_" -f2- | rev | cut -c 3- | rev
}
mysql_contenner_backup(){
        target_contenner=$1
        mysql_contenner_service_name=`get_contenner_service_name ${target_contenner}`
        mysql_dump_name=${mysql_contenner_service_name}_dumpall.sql
        echo "MySQLバックアップ開始:${mysql_contenner_service_name}"
        docker exec -i ${target_contenner} /bin/sh -c 'exec mysqldump --all-databases -uroot -p"$MYSQL_ROOT_PASSWORD"' > ${backup_dir}/${mysql_dump_name}
        if [ $? -ne 0 -o ! -e ${backup_dir}/${mysql_dump_name} -o ! -s ${backup_dir}/${mysql_dump_name} ]; then
                echo "mysqlバックアップに失敗:${mysql_contenner_service_name}"
                exit 1
        fi
        echo "MySQLバックアップ終了:${mysql_contenner_service_name}"
}
pgsql_contenner_backup(){
        target_contenner=$1
        pgsql_contenner_service_name=`get_contenner_service_name ${target_contenner}`
        pgsql_dump_name=${pgsql_contenner_service_name}_dumpall.sql
        echo "PostgreSQLバックアップ開始:${pgsql_contenner_service_name}"
        docker exec -i ${target_contenner} /bin/sh -c 'pg_dumpall -U $POSTGRES_USER' > ${backup_dir}/${pgsql_dump_name}
        if [ $? -ne 0 -o ! -e ${backup_dir}/${pgsql_dump_name} -o ! -s ${backup_dir}/${pgsql_dump_name} ]; then
                echo "postgresqlバックアップに失敗:${pgsql_contenner_service_name}"
                exit 1
        fi
        echo "PostgreSQLバックアップ終了:${pgsql_contenner_service_name}"
}
contenner_backup(){
        target_contenner=$1
        target_contenner_service_name=`get_contenner_service_name ${target_contenner}`
        echo "Dockerコンテナ終了:${target_contenner_service_name}"
        docker-compose stop ${target_contenner_service_name}
        if [ $? -ne 0 ]; then
                echo "Dockerコンテナ終了に失敗：${target_contenner_service_name}"
                exit 1
        fi
        docker run --rm --volumes-from ${target_contenner} -v ${backup_dir}:/backup -e TAR_OPTS="--verbose" akira345/docker-backup backup ${target_contenner}.tar.xz
        if [ $? -ne 0 ]; then
                echo "Dockerコンテナバックアップに失敗：${target_contenner_serivce_name}"
                exit 1
        fi
        echo "Dockerコンテナ起動:${target_contenner_service_name}"
        docker-compose start ${target_contenner_service_name}
}
target_contenners=$(docker-compose ps | tail -n +3 | cut -d " " -f1)

backup_dir=$(pwd)/backup
mkdir -p ${backup_dir}
echo ${target_contenners}
echo "start : `date +'%Y/%m/%d %H:%M:%S'`"

if [ -n "${target_contenners}" ]; then
        echo "バックアップ開始"

        for target_contenner in ${target_contenners};
        do
                #PostgreSQL、MySQLコンテナ名に一致するように修正すること
                if [[ ${target_contenner} =~ pgsql|postgresql ]]; then
                        pgsql_contenner_backup ${target_contenner}
                elif [[ ${target_contenner} =~ mysql ]]; then
                        mysql_contenner_backup ${target_contenner}
                else
                        contenner_backup ${target_contenner}
                fi
        done
        echo "END"
fi
echo "end : `date +'%Y/%m/%d %H:%M:%S'`"
exit 0

Dockerfile

FROM zabbix/zabbix-web-apache-pgsql:ubuntu-latest
USER root
RUN apt-get clean && apt-get update && \
        apt-get -y install fonts-ipafont && \
        rm -f /etc/alternatives/zabbix-frontend-font && \
        rm -f /usr/share/zabbix/assets/fonts/DejaVuSans.ttf && \
        update-alternatives --install /usr/share/zabbix/assets/fonts/DejaVuSans.ttf zabbix-frontend-font /usr/share/fonts/opentype/ipafont-gothic/ipagp.ttf 50 && \
        update-alternatives --set zabbix-frontend-font /usr/share/fonts/opentype/ipafont-gothic/ipagp.ttf && \
        chown -R www-data:www-data /usr/share/zabbix/assets/ && \
        chmod -R 744 /usr/share/zabbix/assets && \
        rm -rf /var/lib/apt/lists/*

pgsql.conf

# DB Version: 13
# OS Type: linux
# DB Type: dw
# Total Memory (RAM): 2 GB
# CPUs num: 2
# Connections num: 100
# Data Storage: ssd

max_connections = 100
shared_buffers = 512MB
effective_cache_size = 1536MB
maintenance_work_mem = 256MB
checkpoint_completion_target = 0.9
wal_buffers = 16MB
default_statistics_target = 500
random_page_cost = 1.1
effective_io_concurrency = 200
work_mem = 2621kB
min_wal_size = 4GB
max_wal_size = 16GB
max_worker_processes = 2
max_parallel_workers_per_gather = 1
max_parallel_workers = 2
max_parallel_maintenance_workers = 1
listen_addresses = '*'

proxy_docker-compose.yml

version: '2'
# proxy
services:
  proxy:
    image: jwilder/nginx-proxy
    container_name: nginx-proxy
    ports:
      - "80:80"
    volumes:
      - /var/run/docker.sock:/tmp/docker.sock:ro
    restart: always

networks:
  default:
    external:
      name: common_link

zabbix3_docker-compose.yml

version: '2'
volumes:
  zabbix_mysql_data:
    driver: local
services:
  # zabbix_mysql
  zabbix_mysql:
    restart: always
    image: mysql:8
    volumes:
      - zabbix_mysql_data:/var/lib/mysql
      - ./zabbix_mysql/conf:/etc/mysql/conf.d
    environment:
      MYSQL_ROOT_PASSWORD: passwd
      MYSQL_USER: zabbix
      MYSQL_PASSWORD: zabbix
      MYSQL_DATABASE: zabbix
  # zabbix
  zabbix-server:
    restart: always
    image: zabbix/zabbix-server-mysql:latest
    volumes:
      - /etc/localtime:/etc/localtime:ro
      - /etc/timezone:/etc/timezone:ro
    depends_on:
      - zabbix_mysql
    environment:
      DB_SERVER_HOST: zabbix_mysql
      MYSQL_DATABASE: zabbix
      MYSQL_USER: zabbix
      MYSQL_PASSWORD: zabbix
    ports:
      - "10051:10051"
    links:
      - zabbix_mysql:mysql
  zabbix-web:
    restart: always
    image: zabbix/zabbix-web-apache-mysql:latest
    depends_on:
      - zabbix-server
      - zabbix_mysql
    environment:
      DB_SERVER_HOST: zabbix_mysql
      MYSQL_DATABASE: zabbix
      MYSQL_USER: zabbix
      MYSQL_PASSWORD: zabbix
      PHP_TZ: Asia/Tokyo
      ZBX_SERVER_HOST: zabbix-server
      ZBX_SERVER_PORT: 10051
      ZBX_SERVER_NAME: zabbix3.example.com
      VIRTUAL_HOST: zabbix3.example.com
      VIRTUAL_PORT: 80
    links:
      - zabbix_mysql:mysql
      - zabbix-server:zabbix-server
networks:
  default:
    external:
      name: common_link

zabbix3_docker-compose_pgsql.yml

version: '2'
volumes:
  zabbix_pgsql_data:
    driver: local
  zabbix_server_mib:
    driver: local
services:
  # zabbix_pgsql
  zabbix_pgsql:
    restart: always
    image: postgres:14
    volumes:
      - zabbix_pgsql_data:/var/lib/postgresql/data
      - ./pgsql.conf:/etc/postgresql/postgresql.conf
    environment:
      POSTGRES_PASSWORD: passwd
      POSTGRES_USER: zabbix
      POSTGRES_DB: zabbix
      POSTGRES_INITDB_ARGS: --encoding=UTF-8 --locale=C
    command: 'postgres -c config_file="/etc/postgresql/postgresql.conf"'
  # zabbix
  zabbix-server:
    restart: always
    image: zabbix/zabbix-server-pgsql:latest
    volumes:
      - /etc/localtime:/etc/localtime:ro
      - /etc/timezone:/etc/timezone:ro
      - zabbix_server_mib:/var/lib/zabbix/mibs
    depends_on:
      - zabbix_pgsql
    environment:
      DB_SERVER_HOST: zabbix_pgsql
      POSTGRES_DB: zabbix
      POSTGRES_USER: zabbix
      POSTGRES_PASSWORD: passwd
    ports:
      - "10051:10051"
    links:
      - zabbix_pgsql:zabbix_pgsql
  zabbix-web:
    restart: always
    image: zabbix/zabbix-web-apache-pgsql:ubuntu-latest
    build: .
    volumes:
      - /etc/localtime:/etc/localtime:ro
      - /etc/timezone:/etc/tmezone:ro
    depends_on:
      - zabbix-server
      - zabbix_pgsql
    environment:
      DB_SERVER_HOST: zabbix_pgsql
      POSTGRES_DB: zabbix
      POSTGRES_USER: zabbix
      POSTGRES_PASSWORD: passwd
      PHP_TZ: Asia/Tokyo
      ZBX_SERVER_HOST: zabbix-server
#      ZBX_SERVER_PORT: 10051
      ZBX_SERVER_NAME: zabbix3.example.com
      VIRTUAL_HOST: zabbix3.example.com
      VIRTUAL_PORT: 80
    links:
      - zabbix_pgsql:zabbix_pgsql
      - zabbix-server:zabbix-server
networks:
  default:
    external:
      name: common_link