玩轉open-falcon

#1
 wget https://github.com/XiaoMi/open-falcon/releases/download/0.0.5/open-falcon-0.0.5.tar.gz -O open-falcon.tar.gz
 mkdir tmp
 tar -zxvf open-falcon.tar.gz -C ./tmp

更新yum源
  cd /etc/yum.repos.d/
  mv CentOS-Base.repo CentOS-Base.repo.backup
  wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
  yum makecache
  yum -y update
 
 發現repos.fedorapeople.org 404， 我們要找到幹掉
 grep -l repos.fedorapeople.org ./*.repo

#2
  yum install redis-server
  yum install mysql-server

如果遇見mysql忘記密碼
  #1 在 /etc/my.cnf 添加 skip-grant-tables  注意： 修改後把這個註釋掉
  #2 /etc/init.d/mysqld restart
  #3 update mysql.user set password=PASSWORD('123456') where user='root';

#3
  yum install git* -y
  git clone https://github.com/open-falcon/scripts.git
  cd scripts
  mysql -h localhost -u root -p < db_schema/graph-db-schema.sql
  mysql -h localhost -u root -p < db_schema/dashboard-db-schema.sql
  mysql -h localhost -u root -p < db_schema/portal-db-schema.sql
  mysql -h localhost -u root -p < db_schema/links-db-schema.sql
  mysql -h localhost -u root -p < db_schema/uic-db-schema.sql
  注意:上述mysql如果設密碼，需要輸入密碼

#4 安裝agent （該安裝需要在採集數據上報的機器上裝）
   將falcon-agent-5.1.0.tar.gz 拷貝去
   passd 123456
   scp falcon-agent-5.1.0.tar.gz 192.168.11.199:/tmp
   mkdir /home/open-falcon
   cd /home/open-falcon
   mv /tmp/falcon-agent-5.1.0.tar.gz .
   tar zxf falcon-agent-5.1.0.tar.gz
   mv cfg.example.json cfg.json && ./control start && ./control tail
   
#5 回到服務端
   cd /home/open-falcon
   mkdir {agent,alarm,dashboard,fe,gateway,graph,hbs,judge,links,portal,query,sender,task,transfer}
   cd /tmp

   tar zxf  falcon-agent-5.1.0.tar.gz -C ../agent
   。。。

   進入各個目錄全部啓動：  ./control start
   參照手冊。。。http://www.jianshu.com/p/a5fcd5c048f1
   
部署中的問題：
Cleaning up...
Command /home/open-falcon/dashboard/env/bin/python -c "import setuptools;__file__='/home/open-falcon/dashboard/env/build/mysql-python/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-VycJSx-record/install-record.txt --single-version-externally-managed --install-headers /home/open-falcon/dashboard/env/include/site/python2.6 failed with error code 1 in /home/open-falcon/dashboard/env/build/mysql-python
Traceback (most recent call last):
  File "./env/bin/pip", line 9, in <module>
    load_entry_point('pip==1.4.1', 'console_scripts', 'pip')()
  File "/home/open-falcon/dashboard/env/lib/python2.6/site-packages/pip/__init__.py", line 148, in main
    return command.main(args[1:], options)
  File "/home/open-falcon/dashboard/env/lib/python2.6/site-packages/pip/basecommand.py", line 169, in main
    text = '\n'.join(complete_log)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe9 in position 20: ordinal not in range(128)



處理辦法： 將上面報錯的py文件中加上下面三行
import sys
reload(sys)
sys.setdefaultencoding('utf-8')


問題：error: command 'gcc' failed with exit status 1
yum groupinstall -y development
yum install -y zlib-dev openssl-devel sqlite-devel bzip2-devel libxslt-devel libffi-devel


#6 處理高併發
1. 分片：一臺機器抗不住就分成多臺機器，數人云是一個 PaaS 平臺，PaaS 平臺很容易做擴容，原來三百臺實例現在做三千臺，在頁面上按鍵按一下，10 秒就可以讓 3000 臺實例起來，做 3000 個分片。


2. 隊列：有時候產生一些峯值，我們不希望被峯值打垮，於是用隊列做緩衝，這個系統有多個地方用到隊列，比如 transfer 內存中構建了多條隊列，報警事件使用 Redis 做隊列服務。


3. 索引：索引可以加快查詢速度。


4. 限流：後端的接口抗不住壓力的時候會做限流。