优化前架构
主要问题
- emqtt 2.x版本问题
- linux 内核参数
- erl 配置参数
haproxy问题
- 单点
-
配置最大连接数问题
- 配置文件中TCP最大连接数被我设置成2049啦，这就导致TCP同时保持的最大连接只有2049个，限制了客户端连接成功率
-
配置tcp保活时长问题
- TCP心跳最大时长我设置啦30秒
- 其他配置参数不合理（分发，重试策略）
- 服务器端口重用没有开启
优化后架构
优化功能点
emq版本升级
- emqx3.1版本
- 安装/部署
rpm -ivh emqx-centos7-v3.1.0.x86\_64.rpm- 启动/停止
service emqx start/stop/restart- 集群加入/离开
emqx_ctl cluster join emqx@iplinux系统调优
- 参考官网
https://emqttd-docs-zh-cn.rea... - emq配置参数调优
haproxy调优
- 安装
[root@dz home]# yum install -y pcre-devel bzip2-devel gcc gcc-c++ make
[root@dz home]# tar -zxvf haproxy-1.8.13.tar.gz
[root@dz home]# cd haproxy-1.8.13
[root@dz haproxy-1.8.13]# make TARGET=linux2628 PREFIX=/usr/local/haproxy
[root@dz haproxy-1.8.13]# make install PREFIX=/usr/local/haproxy
install -d "/usr/local/haproxy/sbin"
install haproxy "/usr/local/haproxy/sbin"
install -d "/usr/local/haproxy/share/man"/man1
install -m 644 doc/haproxy.1 "/usr/local/haproxy/share/man"/man1
install -d "/usr/local/haproxy/doc/haproxy"
for x in configuration management architecture peers-v2.0 cookie-options lua WURFL-device-detection proxy-protocol linux-syn-cookies network-namespaces DeviceAtlas-device-detection 51Degrees-device-detection netscaler-client-ip-insertion-protocol peers close-options SPOE intro; do \
install -m 644 doc/$x.txt "/usr/local/haproxy/doc/haproxy" ; \
done
[root@dz haproxy-1.8.13]#
[root@dz haproxy-1.8.13]# /usr/local/haproxy/sbin/haproxy -v
HA-Proxy version 1.8.13 2018/07/30
Copyright 2000-2018 Willy Tarreau
[root@dz haproxy-1.8.13]#
[root@dz haproxy-1.8.13]# mkdir /etc/haproxy
[root@dz haproxy-1.8.13]# groupadd haproxy
[root@dz haproxy-1.8.13]# useradd -s /sbin/nologin -M -g haproxy haproxy //添加haproxy运行haproxy账号并设置及属主与属组
[root@dz haproxy-1.8.13]# cp examples/haproxy.init /etc/init.d/haproxy
[root@dz haproxy-1.8.13]# chmod 755 /etc/init.d/haproxy
[root@dz haproxy-1.8.13]# chkconfig --add haproxy
[root@dz haproxy-1.8.13]# cp /usr/local/haproxy/sbin/haproxy /usr/sbin/ - 配置参数调优
vim /etc/haproxy/haproxy.cfg#---------------------------------------------------------------------
#默认配置和全局配置
defaults
log global
option dontlognull
option http-server-close
# option forwardfor
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 60s
timeout client 2m
timeout server 2m
timeout http-keep-alive 10s
timeout check 10s
#配置前端的监听端口
frontend emqtt-front
bind *:1883
maxconn 1000000
mode tcp
default_backend emqtt-backend
#配置后端的转发端口
backend emqtt-backend
balance roundrobin
# balance source
server emq1 10.199.96.149:9883 check inter 100000 fall 2 rise 5 weight 1
server emq2 10.199.96.150:9883 check inter 100000 fall 2 rise 5 weight 1
server emq3 10.199.96.152:9883 check inter 100000 fall 2 rise 5 weight 1
# source 0.0.0.0 usesrc clientip
frontend emqtt-admin-front
bind *:18083
mode http
default_backend emqtt-admin-backend
backend emqtt-admin-backend
mode http
balance roundrobin
server emq1 10.199.96.149:18083 check
server emq2 10.199.96.150:18083 check
server emq3 10.199.96.152:18083 check
#控制台配置
listen admin_stats
stats enable
bind *:8081
mode http
option httplog
log global
maxconn 10
stats refresh 30s
stats uri /admin
stats realm haproxy
stats auth admin:admin
stats hide-version
stats admin if TRUE- 启动
systemctl start haproxy
8月 08 09:14:34 dz haproxy[3223]: /etc/rc.d/init.d/haproxy: 第 26 行:[: =: 期待一元表达式
修改/etc/rc.d/init.d/haproxy文件
[ ${NETWORKING} = "no" ] && exit 0
改成
[ "${NETWORKING}" = "no" ] && exit 0
systemctl daemon-reload- 开机自启动
chkconfig haproxy on- 高可用
cat << EOF >> /etc/sysctl.conf
fs.file-max=2097152
fs.nr_open=2097152
net.core.somaxconn=32768
net.ipv4.tcp_max_syn_backlog=16384
net.core.netdev_max_backlog=16384
net.ipv4.ip_local_port_range=500 65535
net.core.rmem_default=262144
net.core.wmem_default=262144
net.core.rmem_max=16777216
net.core.wmem_max=16777216
net.core.optmem_max=16777216
net.ipv4.tcp_rmem=1024 4096 16777216
net.ipv4.tcp_wmem=1024 4096 16777216
net.nf_conntrack_max=1000000
net.netfilter.nf_conntrack_max=1000000
net.netfilter.nf_conntrack_tcp_timeout_time_wait=30
net.ipv4.tcp_max_tw_buckets=1048576
net.ipv4.tcp_fin_timeout = 15
EOF
cat << EOF >>/etc/security/limits.conf
* soft nofile 1048576
* hard nofile 1048576
EOF
echo DefaultLimitNOFILE=1048576 >>/etc/systemd/system.conf
echo session required /usr/lib64/security/pam_limits.so >>/etc/pam.d/login
cat << EOF >> /etc/sysctl.conf
net.ipv4.tcp_tw_reuse=1
net.ipv4.tcp_tw_recycle=1
net.ipv4.tcp_fin_timeout=30
net.ipv4.tcp_syncookies = 1
EOF- keepalived部署
yum install keepalived- 增加配置文件
### /etc/keepalived/keepalived.conf! Configuration File for keepalived
global_defs {
notification_email {
[email protected]
# [email protected]
# [email protected]
}
notification_email_from [email protected]
smtp_server smtp.163.com
smtp_connect_timeout 30
router_id mqtt40
vrrp_skip_check_adv_addr
# vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
mcast_src_ip 172.16.40.22
# unicast_peer {
# 172.18.40.41 ##（对端IP地址）此地址一定不能忘记,vrrp need use
# }
virtual_ipaddress {
172.16.40.24/24
# 192.168.200.16
# 192.168.200.17
# 192.168.200.18
}
}- 开机启动
systemctl enable keepalived- 172.16.40.24作为虚拟IPkeepalive的服务器提供外网访问
测试工具
依赖安装
yum -y install ncurses-devel openssl-devel unixODBC-devel gcc-c++
mkdir -p /app/install $$ cd /app/install/
wget http://erlang.org/download/otp_src_21.3.tar.gz
tar -xvzf otp_src_19.0.tar.gz
cd otp_src_19.0
./configure --prefix=/usr/local/erlang --with-ssl -enable-threads -enable-smmp-support -enable-kernel-poll --enable-hipe --without-javac
make && make install配置erl环境变量
vim /etc/profile
# erlang
export ERLPATH=/usr/local/erlang
export PATH=$ERLPATH/bin:$PATH
source /etc/profile
erl -v安装压测软件
yum -y install git
cd /app/install
git clone https://github.com/emqtt/emqtt_benchmark.git
cd emqtt_benchmark
make
## 调整系统参数并且开始压测
sysctl -w net.ipv4.ip_local_port_range="500 65535"
echo 1000000 > /proc/sys/fs/nr_open
ulimit -n 1000000测试指令与结果展示
[root@zhanghp2 emqtt_benchmark]# ./emqtt_bench pub -h 192.168.199.132 -p 1883 -c 500 -I 10 -t bench21/%i -s 256
connected: 1
connected: 2
connected: 3
connected: 4
connected: 5
connected: 6
connected: 7
connected: 8
connected: 9
connected: 10
connected: 11
connected: 12
connected: 13
connected: 14
connected: 15
connected: 16测试命令参数说明
./emqtt_bench pub --help
./emqtt_bench sub --help报错总结
`conneted:``138`
`client``49863``EXIT: {shutdown,eaddrnotavail}`
`#分配不了端口`
`[error] [Client <``0.7267``.``0``>] CONNACK Timeout!`
`client``7590``EXIT: {shutdown,connack_timeout}`
`#链接超时`
conneted:`191`
client``49810``EXIT: {shutdown,econnrefused}`
#链接被拒绝
#查看端口号使用命令
netstat -npta | grep <端口号>
#查看端口号使用数量
netstat -npta |grep <端口号> | wc -l监控页面
附件
- haproxy https://pan.baidu.com/s/10opa... 提取码: hmyq
- erl21 https://pan.baidu.com/s/1DzbI... 提取码: j485