参考 https://mosquitto.org/documentation/
https://www.jianshu.com/p/d8ce71cb0a0d
https://blog.csdn.net/yuanpan1987/article/details/107816237
https://www.jianshu.com/p/9e3cb7042a2e
环境
以下均使用root权限执行
1. source编译安装
mkdir -p /home/develop/mosquitto/
cd /home/develop/mosquitto/
wget https://mosquitto.org/files/source/mosquitto-2.0.9.tar.gz
tar -zxvf mosquitto-2.0.9.tar.gz
cd mosquitto-2.0.9
make
报错：没有openssl
#需安装openssl-devel
yum -y install openssl-devel
再次make报错：没有cjson
##安装cjson
下载压缩包https://github.com/DaveGamble/cJSON/archive/master.zip，
将下载的cJSON-master.zip放到服务器上/home/develop/mosquitto/，解压并重命名为cJSON
cd cJSON/
mkdir build
cd build/
yum -y install cmake
cmake ..
make
make install
##注意libcjson.so.1位置，安装到了/usr/local/lib64
重新编译mosquitto
cd /home/develop/mosquitto/mosquitto-2.0.9
make install
make install
程序文件默认安装到以下位置
mosquitto: /usr/local/sbin
configuration: /etc/mosquitto
utility command: /usr/local/bin
2. 配置启动
cd /etc/mosquitto/
cp /etc/mosquitto/mosquitto.conf.example /etc/mosquitto/mosquitto.conf
mosquitto -c /etc/mosquitto/mosquitto.conf
#需要创建mosquitto用户组
groupadd mosquitto
useradd -g mosquitto mosquitto
chown -R mosquitto:mosquitto /etc/mosquitto/
#再次运行
mosquitto -c /etc/mosquitto/mosquitto.conf
#也可以选择后台启动
mosquitto -c /etc/mosquitto/mosquitto.conf -d
默认配置 不允许匿名、绑定ipv4 1883端口、无密码
3. 订阅
mosquitto_sub -t test
报错mosquitto_sub: error while loading shared libraries: libmosquitto.so.1: cannot open shared object file: No such file or directory
#创建软链接
ln -s /usr/local/lib/libmosquitto.so.1 /usr/lib/libmosquitto.so.1
ldconfig
#再次订阅
mosquitto_sub -t test
mosquitto_sub: error while loading shared libraries: libcjson.so.1: cannot open shared object file: No such file or directory
#需要将libcjson.so.1所在目录/usr/local/li64目录添加到 /etc/ld.so.conf 文件中
vim /etc/ld.so.conf.d/usr-libs.conf
添加 /usr/local/lib64
#更新库
ldconfig
本机订阅发布测试：
#订阅
mosquitto_sub -t test
#另开一个窗口进行发布
mosquitto_pub -t test -m "hello"
#可以在订阅窗口看到
在云端服务器配置时出现远程订阅不通的情况，可以看到1883绑定到127.0.0.1的地址了，需要修改为0.0.0.0
vim /etc/mosquitto/mosquitto.conf，
#绑定端口、ip
listener 1883 0.0.0.0
#允许匿名（此时无需密码）
allow_anonymous true
，重启mosquitto，此时1883绑定到了0.0.0.0
4. 用户密码权限（可跳过）
https://blog.csdn.net/github_34709302/article/details/91973146
5. 持久化（消息离线保存）
vim /etc/mosquitto/mosquitto.conf，打开持久化开关
persistence true
重启服务生效
6. 设置开机启动服务
vim /usr/lib/systemd/system/mosquitto.service
[Unit]
Description=mosquitto-2.0.9
After=network.target
Wants=network.target
[Service]
Type=forking
User=mosquitto
Group=mosquitto
ExecStart=/usr/local/sbin/mosquitto -c /etc/mosquitto/mosquitto.conf -d
ExecReload=/bin/kill -s HUP $MAINPID
Restart=on-failure
# Give a reasonable amount of time for the server to start up/shut down
TimeoutSec=300
# Place temp files in a secure directory, not /tmp
PrivateTmp=true
[Install]
WantedBy=multi-user.target
#设置
chmod a+x /usr/lib/systemd/system/mosquitto.service
systemctl daemon-reload
systemctl enable mosquitto
systemctl start/stop/restart mosquitto