open-falcon安装使用监控树莓派

简介

open-falcon是一款用golang和python写的监控系统，由小米启动这个项目。
官方网址

http://open-falcon.org/

文档

https://book.open-falcon.org/zh_0_2/

今天我要安装的是0.2版本，监控的是树莓派。系统是阿里云ecs centos7.4

安装准备

安装redis

yum install redis

启动redis服务

systemctl start redis

让redis开机自启

systemctl enable redis

安装mariadb

yum install mariadb-server

启动mariadb服务

systemctl start mariadb

让mariadb开机启动

systemctl enable mariadb

初始化mariadb密码

[root@izuf6hyujh57q98bebkndoz ~]# mysql_secure_installation

NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB
SERVERS IN PRODUCTION USE!  PLEASE READ EACH STEP CAREFULLY!

In order to log into MariaDB to secure it, we'll need the current
password for the root user.  If you've just installed MariaDB, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.

Enter current password for root (enter for none):
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
Enter current password for root (enter for none):
OK, successfully used password, moving on...

Setting the root password ensures that nobody can log into the MariaDB
root user without the proper authorisation.

Set root password? [Y/n] y
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
... Success!

By default, a MariaDB installation has an anonymous user, allowing anyone
to log into MariaDB without having to have a user account created for
them.  This is intended only for testing, and to make the installation
go a bit smoother.  You should remove them before moving into a
production environment.

Remove anonymous users? [Y/n] y
... Success!

Normally, root should only be allowed to connect from 'localhost'.  This
ensures that someone cannot guess at the root password from the network.

Disallow root login remotely? [Y/n] y
... Success!

By default, MariaDB comes with a database named 'test' that anyone can
access.  This is also intended only for testing, and should be removed
before moving into a production environment.

Remove test database and access to it? [Y/n] y
- Dropping test database...
... Success!
- Removing privileges on test database...
... Success!

Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.

Reload privilege tables now? [Y/n] y
... Success!

Cleaning up...

All done!  If you've completed all of the above steps, your MariaDB
installation should now be secure.

Thanks for using MariaDB!

我解释下上面每步都是做什么的

Enter current password for root (enter for none):

当你第一次运行时直接回车就好，就是问你原来的root密码是什么，因为第一次运行，所以直接回车就好

Set root password? [Y/n] y

问你是不是设置root密码

Remove anonymous users? [Y/n] y

问你是不是移除匿名用户

Disallow root login remotely? [Y/n] y

禁止root远程登录

Remove test database and access to it? [Y/n] y

移除test数据库

Reload privilege tables now? [Y/n] y

重新加载权限表
最后运行

mysql -uroot -p

登入mariadb验证下

导入open-falcon数据表
安装git

yum install git

下载falcon-plus里面有open-falcon的数据库导入就好

git clone https://github.com/open-falcon/falcon-plus.git[/code] 进入下面这个目录，然后执行下面命令
cd /root/falcon-plus/scripts/mysql/db_schema

mysql -h 127.0.0.1 -u root -p < 1_uic-db-schema.sql

mysql -h 127.0.0.1 -u root -p < 2_portal-db-schema.sql

mysql -h 127.0.0.1 -u root -p < 3_dashboard-db-schema.sql

mysql -h 127.0.0.1 -u root -p < 4_graph-db-schema.sql

mysql -h 127.0.0.1 -u root -p < 5_alarms-db-schema.sql


之后你会发现数据库中多出了下面这些数据库

+--------------------+
| Database           |
+--------------------+
| information_schema |
| alarms             |
| dashboard          |
| falcon_portal      |
| graph              |
| mysql              |
| performance_schema |
| uic                |
+--------------------+


下载open-falcon的安装包

如果你是其他平台的比如arm或是32位系统的要自己编译下，我就直接使用二进制包安装好了
wget https://github.com/open-falcon/falcon-plus/releases/download/v0.2.1/open-falcon-v0.2.1.tar.gz[/code] 因为网速较慢所以建议本地挂代理下载之后上传到服务器上

启动后端
因为是编译好的包，所以我们就不需要各种复杂的设置了，直接启动就好了
我把所有文件放在home文件夹中work下
mkdir -p /home/work/open-falcon

tar -zxvf open-falcon-v0.2.1.tar.gz -C /home/work/open-falcon/

修改配置文件，其实就是修改所有组件的cfg.json的mariadb密码，我的意思是如果这个组件用到mariadb的话
首先修改aggregator的
vim /home/work/open-falcon/aggregator/config/cfg.json

改为

"database": {
"addr": "root:Yuncan1803@tcp(127.0.0.1:3306)/falcon_portal?loc=Local&parseTime=true",
"idle": 10,
"ids": [1, -1],
"interval": 55
},

注意第二行Yuncan1803是密码，root是用户名其他的都一样
接着修改graph的
vim graph/config/cfg.json


"db": {
"dsn": "root:Yuncan1803@tcp(127.0.0.1:3306)/graph?loc=Local&parseTime=true",
"maxIdle": 4
},

修改hbs的
vim hbs/config/cfg.json


{
"debug": true,
"database": "root:Yuncan1803@tcp(127.0.0.1:3306)/falcon_portal?loc=Local&parseTime=true",
"hosts": "",
"maxConns": 20,
"maxIdle": 15,
"listen": ":6030",
"trustable": [""],
"http": {
"enabled": true,
"listen": "0.0.0.0:6031"
}
}

修改nodata的
vim nodata/config/cfg.json


"config": {
"enabled": true,
"dsn": "root:Yuncan1803@tcp(127.0.0.1:3306)/falcon_portal?loc=Local&parseTime=true&wait_timeout=604800",
"maxIdle": 4
},

修改api的
vim api/config/cfg.json


"db": {
"falcon_portal": "root:Yuncan1803@tcp(127.0.0.1:3306)/falcon_portal?charset=utf8&parseTime=True&loc=Local",
"graph": "root:Yuncan1803@tcp(127.0.0.1:3306)/graph?charset=utf8&parseTime=True&loc=Local",
"uic": "root:Yuncan1803@tcp(127.0.0.1:3306)/uic?charset=utf8&parseTime=True&loc=Local",
"dashboard": "root:Yuncan1803@tcp(127.0.0.1:3306)/dashboard?charset=utf8&parseTime=True&loc=Local",
"alarms": "root:Yuncan1803@tcp(127.0.0.1:3306)/alarms?charset=utf8&parseTime=True&loc=Local",
"db_bug": true
},

修改alarm的
vim alarm/config/cfg.json


"falcon_portal": {
"addr": "root:Yuncan1803@tcp(127.0.0.1:3306)/alarms?charset=utf8&loc=Asia%2FChongqing",
"idle": 10,
"max": 100
},

最好，终于他妈最后了，启动后端
./open-falcon start

你可以用下面的命令检查所有组件的状态
./open-falcon check


[root@izuf6hyujh57q98bebkndoz open-falcon]# ./open-falcon check
falcon-graph         UP           27849
falcon-hbs         UP           27858
falcon-judge         UP           27868
falcon-transfer         UP           27876
falcon-nodata         UP           27883
falcon-aggregator         UP           27891
falcon-agent         UP           27901
falcon-gateway         UP           27908
falcon-api         UP           27915
falcon-alarm         UP           27929

更多命令的用法
./open-falcon [start|stop|restart|check|monitor|reload] module

比如
./open-falcon start agent

这样就启动了agent
./open-falcon check
这个是检查组件状态的
所有组件的日志都在组件目录下logs目录中

安装前端
首先把代码clone下来
cd /home/work/open-falcon

git clone https://github.com/open-falcon/dashboard.git[/code] 安装依赖包
yum install -y python-virtualenv

yum install -y python-devel

yum install -y openldap-devel

yum install -y mysql-devel

yum groupinstall "Development tools"


新建虚拟环境
cd dashboard

virtualenv ./env

安装python依赖
./env/bin/pip install -r pip_requirements.txt

修改配置
vim rrd/config.py

PORTAL_DB_PASS = os.environ.get("PORTAL_DB_PASS","Yuncan1803")

ALARM_DB_PASS = os.environ.get("ALARM_DB_PASS","Yuncan1803")

在生产环境启动

[root@izuf6hyujh57q98bebkndoz dashboard]# bash control start
falcon-dashboard started..., pid=8190

下面是一些其他操作
开发者模式启动
./env/bin/python wsgi.py


停止
bash control stop


查看日志
bash control tail


账号管理
首先我们用ip:8081访问open-falcon，接着要知道的是falcon默认没有任何用户，新建的第一个root用户就是管理员，为了安全你可以修改api组件的配置文件
vim api/config/cfg.json

中的
"signup_disable": false,

设置为true就可以禁止注册了

树莓派上安装
这个肯定是要编译的了，所以先下载golang安装
因为实在树莓派下，所以golang要编译安装，但是现在最新版本的golang都是用go编译的，所以因为我们系统中没有go，只能先安装1.4版本的c语言版本go，之后安装最新版本的go
首先下载
wget https://dl.google.com/go/go1.4.3.src.tar.gz[/code] 解压
tar -zxvf go1.4.3.src.tar.gz

编译
cd go/src

./make.bash

因为是树莓派所以编译肯定花点时间
移动go到/root/go1.4
mv go /root/go1.4

/root/go1.4是默认$GOROOT_BOOTSTRAP的值
接着下载最新版本的go
wget https://dl.google.com/go/go1.9.3.src.tar.gz[/code] 解压
tar -zxvf go1.9.3.src.tar.gz

编译
cd go/src

./make.bash

编译好后接着移动到/usr/local/目录下
mv go /usr/local

设置环境变量
vim ~/.zshrc


export GOROOT=/usr/local/go
export GOPATH=/root/go
export PATH=$PATH:GOROOT/bin

使环境变量生效
source ~/.zshrc


接着编译安装open-falcon的agent
新建一个目录下载源码
mkdir -p $GOPATH/src/github.com/open-falcon

cd $GOPATH/src/github.com/open-falcon

下载源码
git clone https://github.com/open-falcon/falcon-plus.git[/code] 进入agent源码目录
cd falcon-plus/modules/agent

下载依赖
go get

编译
./control build

接着把agent这个文件夹放入/usr/loca/目录
mv agent /usr/local

启动agent生成配置文件
cd /usr/local/agent

./control start

编辑配置文件

{
"debug": true,
"hostname": "raspberry",
"ip": "",
"plugin": {
"enabled": false,
"dir": "./plugin",
"git": "https://github.com/open-falcon/plugin.git",
"logs": "./logs"
},
"heartbeat": {
"enabled": true,
"addr": "ip:6030",
"interval": 60,
"timeout": 1000
},
"transfer": {
"enabled": true,
"addrs": [
"ip:8433"
],
"interval": 60,
"timeout": 1000
},
"http": {
"enabled": true,
"listen": ":1988",
"backdoor": false
},
"collector": {
"ifacePrefix": ["eth", "em"],
"mountPoint": []
},
"default_tags": {
},
"ignore": {
"cpu.busy": true,
"df.bytes.free": true,
"df.bytes.total": true,
"df.bytes.used": true,
"df.bytes.used.percent": true,
"df.inodes.total": true,
"df.inodes.free": true,
"df.inodes.used": true,
"df.inodes.used.percent": true,
"mem.memtotal": true,
"mem.memused": true,
"mem.memused.percent": true,
"mem.memfree": true,
"mem.swaptotal": true,
"mem.swapused": true,
"mem.swapfree": true
}
}

重启
./control restart

和zabbix比起来这个配置真的少了很多，除了HOSTNAME以外就是ip要改，而且挺简单的，dashboard上也不用设置，等会就会有数据出来

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