緣起
最近一直在研究日志收集系統(tǒng)的框架，之前在線游戲的數(shù)據(jù)發(fā)送都是由游戲服務(wù)器發(fā)送的，我來之前一直是rsync傳輸，也還算穩(wěn)定。但現(xiàn)在上了單機(jī)游戲，只能由手機(jī)客戶端直接發(fā)送，dau比較高，最近很火的<<貪吃蛇>>在海外上線，一個(gè)星期dau已經(jīng)達(dá)到千萬級(jí)別。初步方案，lvs做４層負(fù)載均衡，下掛nginx做7層轉(zhuǎn)發(fā)，數(shù)據(jù)直接入kafaka。一直不太喜歡通過reload修改nginx upstream，剛好看到微博的upsync覺得很有價(jià)值，于是拿來研究了一下。

感興趣的童鞋可以看下這篇文章http://mp.weixin.qq.com/s?__biz=MzAwMDU1MTE1OQ==&mid=404151075&idx=1&sn=5f3b8c007981a2d048766f808f8c8c98&scene=2&srcid=0223XScbJrOv7noogVX6T60Q&from=timeline&isappinstalled=0#wechat_redirect（Upsync：微博開源基于Nginx容器動(dòng)態(tài)流量管理方案 ）

consul
upsync的upstream可以從consul(https://www.consul.io/intro/getting-started/install.html)或etcd中獲取，本文使用的是consul這個(gè)用golang寫的服務(wù)注冊(cè)與發(fā)現(xiàn)框架，據(jù)我所知consul在國內(nèi)也用的非常廣，比如微博，今日頭條等。所以需要先安裝consul，consul的getting-started文檔用vagrant（https://www.vagrantup.com/docs/getting-started/）搭建集群的，vagrant是用ruby開發(fā)的用來構(gòu)建虛擬開發(fā)環(huán)境的工具，有點(diǎn)類似docker，不過vagrant是依賴與虛擬機(jī)的，比如virtualbox

下面是我ubuntu主機(jī)安裝操作：?
１．安裝virtualbox和vagrant

sudo apt-get install virtualbox wget https://releases.hashicorp.com/vagrant/1.8.6/vagrant_1.8.6_x86_64.deb sudo dpkg -i vagrant_1.8.6_x86_64.deb

2.下載vagrant鏡像?
由于hashicorp下載太慢，我是在百度云(https://pan.baidu.com/s/1pLzVhnP)上找的一個(gè)ubuntu_trusty_64.box鏡像。

vagrant box add ubuntu ~/vagrant_start/ubuntu_trusty_64.box

把ubuntu_trusty_64.box加載到vagrant中，并命名為ubuntu

3.創(chuàng)建Vagrantfile?
在當(dāng)前目錄下創(chuàng)建Vagrantfile，類似于dockerfile

# -*- mode: ruby -*- # vi: set ft=ruby : $script = <<SCRIPTecho Installing dependencies... sudo apt-get update sudo apt-get install -y unzip curlecho Fetching Consul... cd /tmp/ curl https://releases.hashicorp.com/consul/0.6.4/consul_0.6.4_linux_amd64.zip -o consul.zipecho Installing Consul... unzip consul.zip sudo chmod +x consul sudo mv consul /usr/bin/consulsudo mkdir /etc/consul.d sudo chmod a+w /etc/consul.dSCRIPT# Vagrantfile API/syntax version. Don't touch unless you know what you're doing! VAGRANTFILE_API_VERSION = "2"Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|config.vm.box = "ubuntu"config.vm.provision "shell", inline: $scriptconfig.vm.define "n1" do |n1|n1.vm.hostname = "n1"n1.vm.network "private_network", ip: "172.20.20.10"endconfig.vm.define "n2" do |n2|n2.vm.hostname = "n2"n2.vm.network "private_network", ip: "172.20.20.11"end end

4.啟動(dòng)虛擬機(jī)并登陸到n1

vagrant up vagrant ssh n1

vagrent up將會(huì)讀取當(dāng)前目錄的Vagrantfile，創(chuàng)建兩個(gè)虛擬機(jī)n1,n2,并安裝consul到/usr/bin/consul目錄。

5.啟動(dòng)consul

consul agent -server -bootstrap-expect=1 -data-dir=/tmp/consul -node=agent-one -bind=172.20.20.10 -config-dir=/etc/consul.d -client 0.0.0.0 -ui

n1將會(huì)作為leader節(jié)點(diǎn)，并開啟ui界面，可通過http://172.20.20.10:8500訪問consul管理界面?
６.把upstream存到consul

curl -X PUT http://172.20.20.10:8500/v1/kv/upstreams/test/172.20.20.11:8080

將會(huì)把upsteam　172.20.20.11:8080存到consul的kv store中。?
到這里consul就結(jié)束了

nginx-upsync-module+nginx_upstream_check_module
upsync(https://github.com/weibocom/nginx-upsync-module)是微博開源的，以及在微博廣泛使用了，下面將安裝上面這兩個(gè)nginx擴(kuò)展

1.下載對(duì)應(yīng)軟件包?
如果在宿主機(jī)，最好在Vagrantfile目錄下載，Vagrant會(huì)共享當(dāng)前目錄到虛擬機(jī)的/vagrant?
目錄，如果在虛擬機(jī)則可以在/vagrant目錄下載。

需要注意版本，具體看upsync Readme，由于我使用時(shí)upsync master支持nginx1.9+,所以我使用了nginx1.9.2

vagrant ssh n2 wget 'http://nginx.org/download/nginx-1.9.2.tar.gz' git clone https://github.com/weibocom/nginx-upsync-module git clone https://github.com/xiaokai-wang/nginx_upstream_check_module

nginx_upstream_check_module需要根據(jù)nginx不同版本給nginx打patch，具體看Readme，upstream_check是tengine（http://tengine.taobao.org/documentation_cn.html）中的模塊，主要作用用于upstream的健康檢查。當(dāng)遇到不可用的upstream時(shí)，nginx雖然會(huì)自動(dòng)使用下一個(gè)upstream，但下一次還是會(huì)重試該upstream，導(dǎo)致無效請(qǐng)求增多。upstream_check檢測到不可用會(huì)剔除該upsteam，該特性還是很有用的。

２．編譯安裝nginx

sudo apt-get install libreadline-dev libncurses5-dev libpcre3-dev libssl-dev perl make build-essential wget 'http://nginx.org/download/nginx-1.9.2.tar.gz' git clone https://github.com/weibocom/nginx-upsync-module git clone https://github.com/xiaokai-wang/nginx_upstream_check_module patch -p0 < /vagrant/nginx_upstream_check_module/check_1.9.2+.patch./configure --add-module=/vagrant/nginx_upstream_check_module ?--add-module=/vagrant/nginx-upsync-module? make && make install

3．配置nginx?
nginx會(huì)默認(rèn)安裝到/usr/local/nginx目錄下

cd /usr/local/nginx mkdir /usr/local/nginx/conf/conf.d mv /usr/local/nginx/conf/nginx.conf /usr/local/nginx/conf/nginx.conf_backuseradd -M nginx mkdir /var/log/nginx mkdir /usr/local/nginx/conf/servers

將之前的nginx.conf備份，用下面內(nèi)容替換?

vim /usr/local/nginx/conf/nginx.confuser ?nginx; worker_processes ?5;error_log ?/var/log/nginx/error.log warn; pid ? ? ? ?/var/run/nginx.pid;events {worker_connections ?1024; }http {include ? ? ? /usr/local/nginx/conf/mime.types;default_type ?application/octet-stream;log_format ?main ?'$remote_addr - $remote_user [$time_local] "$request" ''$status $body_bytes_sent "$http_referer" ''"$http_user_agent" "$http_x_forwarded_for"';access_log ?/var/log/nginx/access.log ?main;sendfile ? ? ? ?on;#tcp_nopush ? ? on;keepalive_timeout ?65;#gzip ?on;include /usr/local/nginx/conf/conf.d/*.conf; }

創(chuàng)建check.conf?

vim /usr/local/nginx/conf/conf.d/check.confupstream test {# fake server otherwise ngx_http_upstream will report error when startupserver 127.0.0.1:11111;# all backend server will pull from consul when startup and will delete fake serverupsync 172.20.20.10:8500/v1/kv/upstreams/test upsync_timeout=6m upsync_interval=500ms upsync_type=consul strong_dependency=off;upsync_dump_path /usr/local/nginx/conf/servers/servers_test.conf;check interval=1000 rise=2 fall=2 timeout=3000 type=http default_down=false;check_http_send "HEAD / HTTP/1.0\r\n\r\n";check_http_expect_alive http_2xx http_3xx;}upstream bar {server 172.20.20.11:8080 weight=1 fail_timeout=10 max_fails=3;}server {listen 80;location = / {proxy_pass http://test;}location = /upstream_show {upstream_show;}location = /upstream_status {check_status;access_log off;}}

4.啟動(dòng)nginx

我們?cè)谏厦娼榻Bconsul的最好增加一個(gè)172.20.20.11:8080 upstream,　在n2上我們開一個(gè)python的http server

/usr/local/nginx/sbin/nginx python -m SimpleHTTPServer 8080

大功告成，看下成果

請(qǐng)將下面的172.20.20.13地址換成你們的172.20.20.11，我開了很多個(gè)虛擬機(jī)^^^^

首頁就是用python開的simplehttpserver?

upstream列表?

upstream狀態(tài)?

---------------------?
作者：yueguanghaidao?
來源：CSDN?
原文：https://blog.csdn.net/yueguanghaidao/article/details/52801043?
版權(quán)聲明：本文為博主原創(chuàng)文章，轉(zhuǎn)載請(qǐng)附上博文鏈接！

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