Prometheus监控Mongodb副本集

副本集结构

10.140.10.27 主节点
10.140.10.28 从节点
10.140.10.29 仲裁节点

注意：

1、安装mongodb_exporter可以不在仲裁节点安装，仲裁节点设置的用户名密码是无法使用的，若仲裁节点没有安装，监控中mongodb_up是无法显示，只会显示主从的值

2、启动方式建议使用第二种，第二种mongo_up可以查看主从的值，mongodb_replset_my_state=3是正常的，如果选择第一种 mongodb_replset_my_state=4 是错误的，若只在一个节点执行启动方式一的话mongodb_replset_my_state的值也是错误的

3、mongodb设置用户名密码时尽量不要使用@这个特殊符号，启动的时候是会导致无法链接

4、最好是单独设置一个监控的用户名密码指定admin库 试过指定对应的库未成功

安装golang

yum -y install golang

编辑环境变量并生效

export GOROOT=/usr/lib/golang
export GOPATH=/usr/local/golang
export PATH=$PATH:$GOROOT/bin
source /etc/profile

创建目录

mkdir /usr/local/golang

安装插件

go get github.com/Masterminds/glide
go install github.com/Masterminds/glide
cd $GOPATH/src/github.com/Masterminds/glide
go build
cp glide /usr/local/bin

安装mongodb_exporter

git clone https://github.com/dcu/mongodb_exporter.git  $GOPATH/src/github.com/dcu/mongodb_exporter

cd $GOPATH/src/github.com/dcu/mongodb_exporter

make build

成功后，出现这个命令

[root@test mongodb_exporter]# ll
total 10672
drwxr-xr-x 3 root root     4096 Sep  8 16:48 collector
-rw-r--r-- 1 root root      516 Sep  8 16:48 Dockerfile
-rw-r--r-- 1 root root     1472 Sep  8 16:48 glide.lock
-rw-r--r-- 1 root root      358 Sep  8 16:48 glide.yaml
drwxr-xr-x 2 root root       28 Sep  8 16:48 grafana_dashboards
-rw-r--r-- 1 root root    35252 Sep  8 16:48 groups.yml
-rw-r--r-- 1 root root     1082 Sep  8 16:48 LICENSE
-rw-r--r-- 1 root root      783 Sep  8 16:48 Makefile
-rwxr-xr-x 1 root root 10846790 Sep  8 16:48 mongodb_exporter
-rw-r--r-- 1 root root     8123 Sep  8 16:48 mongodb_exporter.go
-rw-r--r-- 1 root root     4683 Sep  8 16:48 README.md
drwxr-xr-x 2 root root       37 Sep  8 16:48 screenshots
drwxr-xr-x 2 root root      111 Sep  8 16:48 shared
drwxr-xr-x 2 root root       79 Sep  8 16:48 snap
drwxr-xr-x 4 root root       40 Sep  8 16:48 vendor

第一种方式启动

分别在主从节点执行此命令
cd /usr/local/golang/src/github.com/dcu/mongodb_exporter
./mongodb_exporter -mongodb.uri mongodb://10.140.10.27:27017,10.140.10.28:27017

 第二种方式启动

启动主节点
cd /usr/local/golang/src/github.com/dcu/mongodb_exporter
./mongodb_exporter -mongodb.uri mongodb://10.140.10.27:27017

启动从节点

cd /usr/local/golang/src/github.com/dcu/mongodb_exporter
./mongodb_exporter -mongodb.uri mongodb://10.140.10.28:27017

启动脚本

cp /usr/local/golang/src/github.com/dcu/mongodb_exporter/mongodb_exporter  /usr/local/bin
cat /etc/init.d/mongodb_exporter
#!/bin/bash
IP=`ip addr | grep -v virbr |grep -o -e 'inet [0-9]\{1,3\}.[0-9]\{1,3\}.[0-9]\{1,3\}.[0-9]\{1,3\}'|grep -v "127.0.0"|awk '{print $2}'`
PORT=27017 
COMMAND=/usr/local/bin/mongodb_exporter
SERVER=mongodb_exporter
USER=txkj
PASSWORD=123456
PIDNUM=`pidof $SERVER`
start(){
if [ -z "$PIDNUM" ];then
    $COMMAND -mongodb.uri mongodb://$USER:$PASSWORD@$IP:$PORT >/dev/null 2>&1 &
    echo "Now,the server has runing"
else
    echo "$0 is running"
fi
}
stop(){
if [ -z "$PIDNUM" ];then
    echo "$0 is not running"
else
    echo "shutting down $0"
    kill -9 "$PIDNUM" && echo "PID $PIDNUM was killed."
fi
}
status(){
if [[ -z "$PIDNUM" ]];then
    echo "$0 is not runing"
else
    echo "$0 is runing,it's PID is $PIDNUM"
fi
}
case $1 in
start)
start
;;
stop)
stop
;;
status)
status
;;
restart)
stop
start
;;
*)
echo "Usage:$0 {start|stop|status|restart}"
;;
esac
添加执行权限
chmod +x /etc/init.d/mongodb_exporter

检测

curl http://10.140.10.27:9001/metrics

到此，mongodb_exporter部署完成了，现在开始修改peometheus的配置文件

- job_name: 'mongodb-Rep'
    static_configs:
    - targets: ['10.140.10.27:9001']
      labels:
        instance: 10.140.10.27
    - targets: ['10.140.10.28:9001']
      labels:
        instance: 10.140.10.28