CentOS7安装RabbitMQ集群

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1 实验环境

RabbitMQ 集群

server1.example.com    IP: 10.10.10.11    Node: disk
server2.example.com    IP: 10.10.10.12    Node: disk
server3.example.com    IP: 10.10.10.13    Node: disk

RabbitMQ相关端口

4369 (epmd), 25672 (Erlang distribution) 
5672, 5671 (AMQP 0-9-1 without and with TLS) 
15672 (if management plugin is enabled) 
61613, 61614 (if STOMP is enabled) 
1883, 8883 (if MQTT is enabled)

2 YUM方式安装

2.1 添加EPEL源

~># rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

2.2 添加Erlang源

~># yum install wget
~># rpm -Uvh http://packages.erlang-solutions.com/erlang-solutions-1.0-1.noarch.rpm

2.3 安装RabbitMQ

~># wget http://www.rabbitmq.com/releases/rabbitmq-server/v3.6.1/rabbitmq-server-3.6.1-1.noarch.rpm
~># rpm --import https://www.rabbitmq.com/rabbitmq-signing-key-public.asc
~># yum install rabbitmq-server-3.6.1-1.noarch.rpm

3 手动RPM方式

3.1 安装RabbitMQ

~># wget http://www.rabbitmq.com/releases/erlang/erlang-18.3-1.el7.centos.x86_64.rpm
~># wget http://www.rabbitmq.com/releases/rabbitmq-server/v3.6.1/rabbitmq-server-3.6.1-1.noarch.rpm
~># wget https://www.rabbitmq.com/rabbitmq-signing-key-public.asc
~># rpm --import rabbitmq-signing-key-public.asc
~># rpm -Uvh erlang-18.3-1.el7.centos.x86_64.rpm rabbitmq-server-3.6.1-1.noarch.rpm
注： 如果是RedHat6，erlang下载地址为 http://www.rabbitmq.com/releases/erlang/erlang-18.3-1.el6.x86_64.rpm

4 RabbitMQ单机配置

4.1 调整可打开文件/文件描述符数目（高并发支持）

调整系统限制
~># vi /etc/sysctl.conf

fs.file-max = 100000

使设置生效
~># sysctl -p
查看系统限制
~># sysctl fs.file-max
调整用户限制
~># vi /etc/security/limits.conf

*              soft     nofile          65536
*              hard     nofile          65536

重启系统使之生效，检查用户限制是否生效
~># ulimit -n

4.2 添加/etc/hosts条目

~># echo "192.168.136.201 server1" >> /etc/hosts

4.3 开通防火墙上Web UI访问端口（默认：15672/tcp）

~># firewall-cmd --permanent --add-port=15672/tcp
~># firewall-cmd –-reload

4.4 设置RabbitMQ服务自启动，并启动RabbbitMQ服务

~># chkconfig rabbitmq-server on
~># service rabbitmq-server start

4.5 启用RabbitMQ监控插件

~># rabbitmq-plugins enable rabbitmq_management

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4.6 RabbitMQ用户管理

添加用户（用户名root，密码admin）
~># rabbitmqctl add_user admin admin

设置用户角色（设置admin用户为管理员角色）
~># rabbitmqctl set_user_tags admin administrator

设置用户权限（设置admin用户配置、写、读的权限）
~># rabbitmqctl set_permissions -p / admin "." "." ".*"

删除用户（删除guest用户）
~># rabbitmqctl delete_user guest

注意：rabbitmq从3.3.0开始禁止使用guest/guest权限通过除localhost外的访问。

如果想使用guest/guest通过远程机器访问，需要在rabbitmq配置文件中(/etc/rabbitmq/rabbitmq.config)中设置loopback_users为[]。

[{rabbit, [{loopback_users, []}]}].

4.7 登陆Web UI

在浏览器中打开http://10.10.10.11:15672

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输入用户名、密码，登陆成功后的界面

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4.8 检查RabbitMQ状态

查看进程：
~># ps aux | grep -v grep | grep rabbitmq-server
查看端口:
~># netstat -tnlp | grep 5672
如果提示netstat命令没找到，请先安装net-tools
~># yum install net-tools
查看RabbitMQ状态：
~># rabbitmqctl status

4.9 RabbitMQ默认配置

~># cat /usr/lib/rabbitmq/lib/rabbitmq_server-3.6.1/sbin/rabbitmq-defaults

### next line potentially updated in package install steps
SYS_PREFIX=

### next line will be updated when generating a standalone release
ERL_DIR=

CLEAN_BOOT_FILE=start_clean
SASL_BOOT_FILE=start_sasl

## Set default values

BOOT_MODULE="rabbit"

CONFIG_FILE=${SYS_PREFIX}/etc/rabbitmq/rabbitmq
LOG_BASE=${SYS_PREFIX}/var/log/rabbitmq
MNESIA_BASE=${SYS_PREFIX}/var/lib/rabbitmq/mnesia
ENABLED_PLUGINS_FILE=${SYS_PREFIX}/etc/rabbitmq/enabled_plugins

PLUGINS_DIR="${RABBITMQ_HOME}/plugins"
IO_THREAD_POOL_SIZE=64

CONF_ENV_FILE=${SYS_PREFIX}/etc/rabbitmq/rabbitmq-env.conf

从上面看出：

• 系统prefix是空
• 配置文件路径是 /etc/rabbitmq/rabbitmq.config (erlang会自动加上.config后缀)
• 环境配置文件是 /etc/rabbitmq/rabbitmq-env.conf
• 日志文件目录是 /var/log/rabbitmq
• 插件文件目录是 安装目录下的plugins，这里RPM安装方式下是 /usr/lib/rabbitmq/lib/rabbitmq_server-3.6.1/plugins

5 RabbitMQ集群配置

集群配置在单机配置完成的基础上进行

5.1 添加/etc/hosts条目

在server1、server2、server3里的/etc/hosts文件中分别添加：

10.10.10.11 server1
10.10.10.12 server2
10.10.10.13  server3

5.2 设置每个节点Cookie

Rabbitmq的集群是依赖于erlang的集群来工作的，所以必须先构建起erlang的集群环境。Erlang的集群中各节点是通过一个magic cookie来实现的，这个cookie存放在 /var/lib/rabbitmq/.erlang.cookie 中，文件是400的权限。所以必须保证各节点cookie保持一致，否则节点之间就无法通信
~># chmod 700 /var/lib/rabbitmq/.erlang.cookie
~># echo -n "AZVOCZYZZBVFLBPTBXU" > /var/lib/rabbitmq/.erlang.cookie
~># chmod 400 /var/lib/rabbitmq/.erlang.cookie
建议在RabbitMQ服务启动前修改过cookie，如果RabbitMQ服务已经启动，修改cookie值后，必须重启RabbitMQ服务，这步很关键
~># ps -ef | grep ^rabbitmq | awk '{print $2}' | xargs kill -9
~># service rabbitmq-server start

5.3 开通防火墙上集群通信端口

~># firewall-cmd --permanent --add-port={4369/tcp,25672/tcp}
~># firewall-cmd --reload

5.4 加入集群

将 server1、server2 、server3组成集群：
默认是磁盘节点，如果是内存节点的话，需要加--ram参数
在server2、server3上分别运行：
~># rabbitmqctl stop_app
~># rabbitmqctl join_cluster rabbit@server1
~># rabbitmqctl start_app

5.5 设置镜像策略

~># rabbitmqctl set_policy ha-all "^" '{"ha-mode":"all","ha-sync-mode":"automatic"}'

相关知识

rabbitmqctl （rabbitmq管理工具）
rabbitmq-plugins （rabbitmq插件管理工具）
rabbitmq-server （rabbitmq服务）

主要配置文件

1. enabled_plugins：设置允许的插件列表。
2. rabbitmq.config：设置rabbitmq运行参数，结构为hash数组格式。
3. rabbitmq-env.conf：rabbitmq环境参数配置

rabbitmq-env.conf中的每项都以RABBITMQ_为前缀，常用参数如下：

RABBITMQ_NODENAME=FZTEC-240088 //节点名称
RABBITMQ_NODE_IP_ADDRESS=127.0.0.1 //IP地址，空串bind所有地址，指定地址bind指定网络接口
RABBITMQ_NODE_PORT=5672 //TCP端口号，默认是5672
RABBITMQ_LOG_BASE=/data/rabbitmq/log //日志所在路径
RABBITMQ_PLUGINS_DIR=/data/rabbitmq/plugins //插件所在路径
RABBITMQ_MNESIA_BASE=/data/rabbitmq/mnesia //mnesia所在路径

rabbitmq-env.conf和rabbitmq.config默认是不存在的。
rabbitmq-env.conf需要在缺省位置手动创建一个。
rabbitmq.config需要在RABBITMQ_CONFIG_FILE指定位置手动创建一个。

6 脚本安装RabbitMQ的脚本

创建脚本文件
~># mkdir rabbitmq-script && cd rabbitmq-script
~># vi rabbitmq.config

[
  {rabbit,
    [
      {cluster_partition_handling, pause_minority}
    ]
  }
].

~># vi settings.conf

ERLANG_EL6_RPM=erlang-19.0.4-1.el6.x86_64.rpm
ERLANG_EL6_RPM_URL=http://www.rabbitmq.com/releases/erlang/erlang-19.0.4-1.el6.x86_64.rpm

ERLANG_EL7_RPM=erlang-19.0.4-1.el7.centos.x86_64.rpm
ERLANG_EL7_RPM_URL=http://www.rabbitmq.com/releases/erlang/erlang-19.0.4-1.el7.centos.x86_64.rpm

RABBITMQ_RPM=rabbitmq-server-3.6.9-1.el7.noarch.rpm
RABBITMQ_RPM_URL=http://www.rabbitmq.com/releases/rabbitmq-server/v3.6.9/rabbitmq-server-3.6.9-1.el7.noarch.rpm

RABBITMQ_KEY=rabbitmq-signing-key-public.asc
RABBITMQ_KEY_URL=https://www.rabbitmq.com/rabbitmq-signing-key-public.asc

RABBITMQ_CONFIG_FILE=rabbitmq.config

ERLANG_COOKIE=AZVOCZYZZBVFLBPTBXUD

RABBITMQ_HTTP_PORT=15672
ERL_EPMD_PORT=4369
RABBITMQ_DIST_PORT=25672

ADMIN_PWD=admin

~># vi install_rabbitmq.sh

#!/bin/bash
#====================================================================
# install_rabbitmq.sh
#
# Linux RabbitMQ Auto Install Script
#
# Copyright (c) 2015, Edward Guan 
# All rights reserved.
# Distributed under the GNU General Public License, version 3.0.
#
# Intro: http://www.cnblogs.com/edward2013/p/5061511.html
#
#====================================================================

echo "Note: This tiny script has been hardcoded specifically for RHEL/CentOS"
echo ""

if [ $(id -u) != "0" ]; then
    echo "Error: You must be root to run this script!"
    exit 1
fi

# defind functions
msg() {
    printf '%b\n' "$1" >&2
}

success() {
    msg "\33[32m[✔]\33[0m ${1}${2}"
}

error() {
    msg "\33[31m[✘]\33[0m ${1}${2}"
    exit 1
}

program_exists() {
    command -v $1 >/dev/null 2>&1
}

function open_rabbitmq_ports() {
    if program_exists firewall-cmd; then
        firewall-cmd -q --permanent \
            --add-port={$RABBITMQ_HTTP_PORT/tcp,$ERL_EPMD_PORT/tcp,$RABBITMQ_DIST_PORT/tcp}
        firewall-cmd -q --reload
        firewall-cmd -q --query-port $RABBITMQ_HTTP_PORT/tcp || return 1
        firewall-cmd -q --query-port $ERL_EPMD_PORT/tcp || return 1
        firewall-cmd -q --query-port $RABBITMQ_DIST_PORT/tcp || return 1
    fi
}

function erase_rabbitmq() {
    rpm -e rabbitmq-server
}

function update_rabbitmq_package() {
    local TMP_FILE=/tmp/.$(basename "$0").tmp
    # install required package
    program_exists wget || yum -y install wget >/dev/null 2>&1
    program_exists socat || yum -y install socat >/dev/null 2>&1

    # install erlang rpm
    if [ ! -f "$ERLANG_RPM_PATH" ]; then
        msg "WARNING: $ERLANG_RPM_PATH not found."
        msg "Try to download and install from $ERLANG_RPM_URL..."
        wget $ERLANG_RPM_URL -P $SCRIPT_PATH || return 1
    fi
    rpm -U $ERLANG_RPM_PATH 2>$TMP_FILE && success "Installed $ERLANG_RPM_PATH" || {
        sed 's/^[ |\t]*//' $TMP_FILE | grep "already installed" || return 1
    }

    # import rabbitmq key
    if [ ! -f "$RABBITMQ_KEY_PATH" ]; then
        msg "WARNING: $RABBITMQ_KEY_PATH not found."
        msg "Try to download and import from $RABBITMQ_KEY_URL..."
        wget $RABBITMQ_KEY_URL -P $SCRIPT_PATH || return 1
    fi
    rpm --import $RABBITMQ_KEY_PATH && success "Imported $RABBITMQ_KEY_PATH"

    # install rabbitmq rpm
    if [ ! -f "$RABBITMQ_RPM_PATH" ]; then
        msg "WARNING: $RABBITMQ_RPM_PATH not found."
        msg "Try to download and install from $RABBITMQ_RPM_URL..."
        wget $RABBITMQ_RPM_URL -P $SCRIPT_PATH || return 1
    fi
    rpm -U $RABBITMQ_RPM_PATH 2>$TMP_FILE && success "Installed $RABBITMQ_RPM_PATH" || {
        sed 's/^[ |\t]*//' $TMP_FILE | grep "already installed" || return 1
    }
}

function set_rabbitmq_users() {
    if program_exists rabbitmqctl; then
        rabbitmqctl list_users | grep -q guest && \
            rabbitmqctl delete_user guest >/dev/null && \
            success "Deleted user [guest]"
        rabbitmqctl list_users | grep -q admin || {
            rabbitmqctl add_user admin $ADMIN_PWD >/dev/null && \
            rabbitmqctl set_user_tags admin administrator >/dev/null && \
            rabbitmqctl set_permissions -p / admin ".*" ".*" ".*" >/dev/null && \
            success "Added user [admin]"
        }
    else
        msg "Command not find: rabbitmqctl" && return 1
    fi
}

function set_rabbitmq_policies() {
    if program_exists rabbitmqctl; then
        rabbitmqctl list_policies | grep -q ha-all || {
            rabbitmqctl set_policy ha-all "^" '{"ha-mode":"all","ha-sync-mode":"automatic"}' >/dev/null && \
            success "Added policy [ha-all]"
        }
    else
        msg "Command not find: rabbitmqctl" && return 1
    fi
}

function install_rabbitmq() {
    rpm -q rabbitmq-server >/dev/null && \
        error "$(rpm -q rabbitmq-server) is already installed"
    update_rabbitmq_package || return 1

    # enable rabbitmq plugin
    rabbitmq-plugins enable rabbitmq_management >/dev/null && \
        success "Enabled rabbitmq plugin [rabbitmq_management]" || return 1
    
    # open firewall ports
#    open_rabbitmq_ports && \
#        success "Opened rabbitmq ports [$RABBITMQ_HTTP_PORT/tcp,$ERL_EPMD_PORT/tcp,$RABBITMQ_DIST_PORT/tcp]" || \
#        return 1

    # deploy rabbitmq.config
    RABBITMQ_CONFIG_PATH="$SCRIPT_PATH/$RABBITMQ_CONFIG_FILE"
    RABBITMQ_CONFIG_LOCATION=/etc/rabbitmq/rabbitmq.config
    cp $RABBITMQ_CONFIG_PATH $RABBITMQ_CONFIG_LOCATION && \
        success "Copyed $RABBITMQ_CONFIG_PATH to $RABBITMQ_CONFIG_LOCATION" || return 1

    # add host entry into /etc/hosts
    HOST_ENTRY=$(egrep "127.0.0.1 +$(hostname -s)" /etc/hosts)
    if [ "x$HOST_ENTRY" == "x" ]; then
        echo "127.0.0.1   $(hostname -s)" >> /etc/hosts && \
        success "Added [127.0.0.1   $(hostname -s)] into /etc/hosts" || return 1
    else
        msg "[$HOST_ENTRY] is already added into /etc/hosts"
    fi

    # set erlang cookie
    [ "x$COOKIE" == "x" ] && COOKIE="$ERLANG_COOKIE"
    ERLANG_COOKIE_PATH=/var/lib/rabbitmq/.erlang.cookie
    if [ ! -f "$ERLANG_COOKIE_PATH" ]; then
        msg "WARNING: $ERLANG_COOKIE_PATH is not exist, create new one"
        touch $ERLANG_COOKIE_PATH || return 1
    fi
    chmod 700 $ERLANG_COOKIE_PATH
    echo -n "$COOKIE" >$ERLANG_COOKIE_PATH
    chmod 400 $ERLANG_COOKIE_PATH
    chown rabbitmq:rabbitmq $ERLANG_COOKIE_PATH
    if [ $(cat $ERLANG_COOKIE_PATH) = "$COOKIE" ]; then
            success "Set erlang cookie value to $COOKIE"
    fi
}

function join_rabbitmq_cluster() {
    local ret=0
    if [ "x$SERVER" != "x" ] && [ "$SERVER" != $(hostname -s) ]; then
        if program_exists rabbitmqctl; then
            rabbitmqctl stop_app >/dev/null
            rabbitmqctl reset >/dev/null
            if [ "$NODE" == "ram" ]; then
                rabbitmqctl join_cluster --ram rabbit@$SERVER >/dev/null || let ret++
            else
                rabbitmqctl join_cluster rabbit@$SERVER >/dev/null || let ret++
            fi
            rabbitmqctl start_app >/dev/null
        else
            msg "Command not find: rabbitmqctl" && return 1
        fi
        if [ "$ret" -eq 0 ]; then
            success "Joined rabbit@$SERVER"
            return 0
        else
            return 1
        fi
    fi
}

function restart_rabbitmq() {
    # kill all rabbitmq server processes
    local RABBITMQ_PIDS=$(ps -ef | grep ^rabbitmq | cut -c 9-16 | tr -s "\n" " ")
    if [ "x$RABBITMQ_PIDS" != "x" ]; then
        kill -9 $RABBITMQ_PIDS && success "Killed all rabbitmq server processes"
    fi
    # enable and start rabbitmq server
    chkconfig rabbitmq-server on
    service rabbitmq-server start
}

function print_usage() {
    echo "Usage: $(basename "$0") [OPTIONS...]"
    echo ""
    echo "Options"
    echo "  [-h|--help]                 Prints a short help text and exists"
    echo "  [-i|--install]              Install rabbitmq server"
    echo "  [-u|--update]               Update rabbitmq server"
    echo "  [-e|--erase]                Erase (uninstall) rabbitmq server"
    echo "  [-c|--cookie]       Set erlang cookie"
    echo "  [-j|--join]         Join rabbitmq cluster"
    echo "  [-n|--node]       Set cluster node type"
}

# read the options
TEMP=`getopt -o hiuec:j:n: --long help,install,update,erase,cookie:,join:,node: -n $(basename "$0") -- "$@"`
eval set -- "$TEMP"

# extract options and their arguments into variables.
while true; do
    case "$1" in
        -h|--help) print_usage ; exit 0 ;;
        -i|--install) ACTION=install ; shift ;;
        -u|--update) ACTION=update ; shift ;;
        -e|--erase) ACTION=erase ; shift ;;
        -c|--cookie) COOKIE=$2 ; shift 2 ;;
        -j|--join) SERVER=$2 ; shift 2 ;;
        -n|--node) NODE=$2 ; shift 2 ;;
        --) shift ; break ;;
        *) error "Internal error!" ;;
    esac
done

# get script path
SCRIPT_PATH="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

# load settings
source "$SCRIPT_PATH/settings.conf" || exit 1

# set erlang and rabbitmq rpm & key path
case $(uname -r) in
    *el7*) 
        ERLANG_RPM_PATH="$SCRIPT_PATH/$ERLANG_EL7_RPM";
        ERLANG_RPM_URL="$ERLANG_EL7_RPM_URL" ;;
    *el6*)
        ERLANG_RPM_PATH="$SCRIPT_PATH/$ERLANG_EL6_RPM";
        ERLANG_RPM_URL="$ERLANG_EL6_RPM_URL" ;;
    *) error "Your system is not RHEL/CentOS" ;;
esac
RABBITMQ_RPM_PATH="$SCRIPT_PATH/$RABBITMQ_RPM"
RABBITMQ_KEY_PATH="$SCRIPT_PATH/$RABBITMQ_KEY"

if [ "x$ACTION" == "x" ] && [ "x$SERVER" == "x" ]; then
    error "$(basename "$0"): missing operand\n" \
    "Try '$(basename "$0") --help' for more information."
fi

echo "$NODE" | grep -qE "^disk$|^ram$|^$" || {
    error "$(basename "$0"): -n: must be disk or ram"
}

# if ACTION is erase, erase rabbitmq server
if [ "$ACTION" == "erase" ]; then
    erase_rabbitmq && {
        msg "\nThanks for erasing rabbitmq-server."
        msg "© `date +%Y` marykay company"
    } || error "Failed erase rabbitmq server"
    exit 0
fi

# if ACTION is update, update rabbitmq server
if [ "$ACTION" == "update" ]; then
    update_rabbitmq_package && restart_rabbitmq && {
        msg "\nThanks for updating rabbitmq-server."
        msg "© `date +%Y` marykay company"
    } || error "Failed update rabbitmq server"
    exit 0
fi

# if ACTION is install, install rabbitmq server
if [ "$ACTION" == "install" ]; then
    install_rabbitmq && restart_rabbitmq && set_rabbitmq_users && set_rabbitmq_policies && join_rabbitmq_cluster && {
        msg "\nThanks for installing rabbitmq-server."
        msg "© `date +%Y` marykay company"
    } || error "Failed install rabbitmq server"
else
    if [ "x$SERVER" != "x" ]; then
        join_rabbitmq_cluster && {
            msg "\nThanks for joining rabbitmq-server."
            msg "© `date +%Y` marykay company"
        } || error "Failed join rabbitmq server"
    fi
fi

在server1，server2上分别运行脚本
~># chmod +x install_rabbitmq.sh

安装RabbitMQ
~># ./install_rabbitmq.sh -i

升级RabbitMQ
~># ./install_rabbitmq.sh -u

卸载RabbitMQ
~># ./install_rabbitmq.sh -e

加入群集，不带-n参数时，默认节点类型为dsik，-n参数后只能接ram和disk
~># ./install_rabbitmq.sh -j server1 -n ram

安装RabbitMQ并加入群集
~># ./install_rabbitmq.sh -ij server1