Nacos集群架構

nacos默認自帶的是嵌入式資料庫derby，在0.7版本之前，在單機模式時nacos使用嵌入式資料庫實作資料的存盤，不方便觀察資料存盤的基本情況，0.7版本增加了支持mysql資料源能力，具體的操作步驟:

• 安裝資料庫，版本要求:5.6.5+
• 初始化mysq資料庫，資料庫初始化檔案: nacos-mysql.sql
• 修改conf/application.properties檔案，增加支持mysql資料源配置（目前只支持mysql)，添加mysql資料源的url、用戶名和密碼，

############################################################
spring.datasource.platform=mysql
db.num=1
db.url.0=jdbc:mysql://127.0.0.1:3306/nacos_config?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true
db.user=root
db.password=123456

修改資料庫

修改集群地址配置

cp cluster.comf.example cluster.conf

192.168.0.135:3333
192.168.0.135:4444
192.168.0.135:5555

修改Nacos啟動腳本

while getopts ":m:f:s:p:" opt
do
    case $opt in
        m)
            MODE=$OPTARG;;
        f)
            FUNCTION_MODE=$OPTARG;;
        s)
            SERVER=$OPTARG;;
        p)
            PORT=$OPTARG;;           
        ?)
        echo "Unknown parameter"
        exit 1;;
    esac
done

# start
echo "$JAVA ${JAVA_OPT}" > ${BASE_DIR}/logs/start.out 2>&1 &
nohup $JAVA -Dserver.port=${PORT} ${JAVA_OPT} nacos.nacos >> ${BASE_DIR}/logs/start.out 2>&1 &
echo "nacos is starting，you can check the ${BASE_DIR}/logs/start.out"

啟動

? ~/Downloads/nacos/bin/ ./startup.sh -p 3333
/Library/Java/JavaVirtualMachines/jdk1.8.0_301.jdk/Contents/Home/bin/java  -server -Xms2g -Xmx2g -Xmn1g -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=320m -XX:-OmitStackTraceInFastThrow -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/Users/guochongling/Downloads/nacos/logs/java_heapdump.hprof -XX:-UseLargePages -Djava.ext.dirs=/Library/Java/JavaVirtualMachines/jdk1.8.0_301.jdk/Contents/Home/jre/lib/ext:/Library/Java/JavaVirtualMachines/jdk1.8.0_301.jdk/Contents/Home/lib/ext:/Users/guochongling/Downloads/nacos/plugins/cmdb:/Users/guochongling/Downloads/nacos/plugins/mysql -Xloggc:/Users/guochongling/Downloads/nacos/logs/nacos_gc.log -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=100M -Dnacos.home=/Users/guochongling/Downloads/nacos -Dloader.path=/Users/guochongling/Downloads/nacos/plugins/health -jar /Users/guochongling/Downloads/nacos/target/nacos-server.jar  --spring.config.location=classpath:/,classpath:/config/,file:./,file:./config/,file:/Users/guochongling/Downloads/nacos/conf/ --logging.config=/Users/guochongling/Downloads/nacos/conf/nacos-logback.xml --server.max-http-header-size=524288
nacos is starting with cluster
nacos is starting，you can check the /Users/guochongling/Downloads/nacos/logs/start.out
? ~/Downloads/nacos/bin/ ./startup.sh -p 4444
/Library/Java/JavaVirtualMachines/jdk1.8.0_301.jdk/Contents/Home/bin/java  -server -Xms2g -Xmx2g -Xmn1g -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=320m -XX:-OmitStackTraceInFastThrow -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/Users/guochongling/Downloads/nacos/logs/java_heapdump.hprof -XX:-UseLargePages -Djava.ext.dirs=/Library/Java/JavaVirtualMachines/jdk1.8.0_301.jdk/Contents/Home/jre/lib/ext:/Library/Java/JavaVirtualMachines/jdk1.8.0_301.jdk/Contents/Home/lib/ext:/Users/guochongling/Downloads/nacos/plugins/cmdb:/Users/guochongling/Downloads/nacos/plugins/mysql -Xloggc:/Users/guochongling/Downloads/nacos/logs/nacos_gc.log -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=100M -Dnacos.home=/Users/guochongling/Downloads/nacos -Dloader.path=/Users/guochongling/Downloads/nacos/plugins/health -jar /Users/guochongling/Downloads/nacos/target/nacos-server.jar  --spring.config.location=classpath:/,classpath:/config/,file:./,file:./config/,file:/Users/guochongling/Downloads/nacos/conf/ --logging.config=/Users/guochongling/Downloads/nacos/conf/nacos-logback.xml --server.max-http-header-size=524288
nacos is starting with cluster
nacos is starting，you can check the /Users/guochongling/Downloads/nacos/logs/start.out
? ~/Downloads/nacos/bin/ ./startup.sh -p 5555
/Library/Java/JavaVirtualMachines/jdk1.8.0_301.jdk/Contents/Home/bin/java  -server -Xms2g -Xmx2g -Xmn1g -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=320m -XX:-OmitStackTraceInFastThrow -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/Users/guochongling/Downloads/nacos/logs/java_heapdump.hprof -XX:-UseLargePages -Djava.ext.dirs=/Library/Java/JavaVirtualMachines/jdk1.8.0_301.jdk/Contents/Home/jre/lib/ext:/Library/Java/JavaVirtualMachines/jdk1.8.0_301.jdk/Contents/Home/lib/ext:/Users/guochongling/Downloads/nacos/plugins/cmdb:/Users/guochongling/Downloads/nacos/plugins/mysql -Xloggc:/Users/guochongling/Downloads/nacos/logs/nacos_gc.log -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=100M -Dnacos.home=/Users/guochongling/Downloads/nacos -Dloader.path=/Users/guochongling/Downloads/nacos/plugins/health -jar /Users/guochongling/Downloads/nacos/target/nacos-server.jar  --spring.config.location=classpath:/,classpath:/config/,file:./,file:./config/,file:/Users/guochongling/Downloads/nacos/conf/ --logging.config=/Users/guochongling/Downloads/nacos/conf/nacos-logback.xml --server.max-http-header-size=524288
nacos is starting with cluster
nacos is starting，you can check the /Users/guochongling/Downloads/nacos/logs/start.out
? ~/Downloads/nacos/bin/ 

驗證

? ~/Downloads/nacos/bin/ ps -ef | grep nacos|grep -v grep|wc -l
       3
? ~/Downloads/nacos/bin/ 

架構決議

我們目前已經將資料庫和三個Nacos服務已經搞定了，我們還需要去配置Nginx服務就可以了，

Nginx配置

我使用的是Macos為了能夠安裝方便一點，我就使用Homebrew安裝nginx，考慮到大家在使用Homebrew中間可能會遇到一些問題，我這里就重點說明一下，

Macos安裝Homebrew

/bin/zsh -c "$(curl -fsSL https://gitee.com/cunkai/HomebrewCN/raw/master/Homebrew.sh)"

Homebrew安裝Nginx遇到443問題

macOS安裝Homebrew時總是報錯（Failed to connect to raw.githubusercontent.com port 443: Connection refused）,由于一些因素，導致GitHub的raw.githubusercontent.com域名決議被污染了，解決辦法如下

• https://www.ipaddress.com/，通過該網站查詢raw.githubusercontent.com的真實IP，
• 按照查詢出來的IP修改本機的hosts檔案，
  
  

Homebrew安裝Nginx并查看資訊

brew install nginx

? ~/ brew info nginx 
nginx: stable 1.21.4, HEAD
HTTP(S) server and reverse proxy, and IMAP/POP3 proxy server
https://nginx.org/
/usr/local/Cellar/nginx/1.21.4 (11 files, 2.1MB) *
  Built from source on 2021-12-17 at 09:09:15
From: https://mirrors.ustc.edu.cn/homebrew-core.git/Formula/nginx.rb
License: BSD-2-Clause
==> Dependencies
Required: openssl@1.1 ?, pcre ?
==> Options
--HEAD
	Install HEAD version
==> Caveats
Docroot is: /usr/local/var/www

The default port has been set in /usr/local/etc/nginx/nginx.conf to 8080 so that
nginx can run without sudo.

nginx will load all files in /usr/local/etc/nginx/servers/.

To restart nginx after an upgrade:
  brew services restart nginx
Or, if you don't want/need a background service you can just run:
  /usr/local/opt/nginx/bin/nginx -g daemon off;
==> Analytics
install: 36,449 (30 days), 121,098 (90 days), 504,359 (365 days)
install-on-request: 36,406 (30 days), 120,869 (90 days), 503,241 (365 days)
build-error: 56 (30 days)
? ~/ 

修改默認的conf,其位置在/usr/local/etc/nginx/nginx.conf

在finder中打開對應的檔案夾

 open -a finder /usr/local/etc/nginx

 #gzip  on;

 upstream cluster{
     server 127.0.0.1:3333;
     server 127.0.0.1:4444;
     server 127.0.0.1:5555;
 }

 server {
     listen       8848;
     server_name  localhost;

     #charset koi8-r;

     #access_log  logs/host.access.log  main;

     location / {
         #root   html;
         #index  index.html index.htm;
         proxy_pass http://cluster;
     }

啟動

? ~/ nginx

如果出現埠占用

lsof -i tcp:port
kill -9 pid