Nacos installation and configuration detailed process

1.Nacos installation

1.1 Overview

Nacos /nɑ:kəʊs/ is the abbreviation of Dynamic Naming and Configuration Service, a dynamic service discovery, configuration management and service management platform that makes it easier to build cloud native applications.

Nacos is dedicated to helping users discover, configure and manage microservices. Nacos provides an easy-to-use feature set that can quickly implement dynamic service discovery, service configuration, service metadata and traffic management.

Nacos makes it more agile and easier to build, deliver and manage microservices platforms. Nacos is a service infrastructure for building modern application architecture centered on "services" (such as microservice paradigm, cloud native paradigm).

1.2.Download

Download address: https://github.com/alibaba/nacos/tags

1.3.Installation

#进入压缩包所在的文件夹:
[root@localhost ~]# cd /usr/upload
#把文件解压到/user/local目录下:
[root@localhost upload]# tar -zxvf nacos-server-1.4.1.tar.gz -C /usr/local	

1.4. Startup and shutdown

• 2.3.1.Startup

#进入nacos的bin包:
[root@localhost local]# cd nacos/bin/
#非集群模式启动:
[root@localhost bin]# ./startup.sh -m standalone

• 2.3.2.Close

[root@localhost bin]# ./shutdown.sh

1.5.Testing

Check the IP address of Linux:

[root@localhost bin]# ifconfig

Browser access: http://192.168.204.156:8848/nacos, the default username/password is: nacos/nacos

2.Nacos persistence

2.1 Why persistence?

Nacos comes with its own embedded database derby by default. However, if you use cluster mode, you cannot use your own database. Otherwise, there will be one database for each node, and the data will not be unified. You need to use external mysql.

2.2 Configure Nacos persistence

2.2.1.Switch database

Modify application.properties

​ vim /usr/local/nacos/conf/application.properties：

Added support for mysql data source configuration (currently only supports mysql, version requirement: 5.6.5+)

### If use MySQL as datasource:
spring.datasource.platform=mysql

### Count of DB:
db.num=1

### Connect URL of DB:
db.url.0=jdbc:mysql://192.168.31.19:3306/nacos?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true&useUnicode=true&useSSL=false&serverTimezone=UTC
db.user.0=root
db.password.0=1111

2.2.2.Initialize the database

Create nacos database and import sql

2.2.3.Testing

Restart nacos to test whether all data written to the embedded database by nacos is written to mysql:

3.Nacos cluster

3.1. Deployment architecture diagram:

1. How to distribute requests evenly? Use nginx
2. Why 3? Vote to elect leader
3. How to synchronize data? leader

3.2.Cluster

3.2.1.Node planning

node	port
192.168.204.156	8848
192.168.204.156	8849
192.168.204.156	8850

3.2.2.Configuring the cluster

1. Find conf/cluster.conf.example, rename it conf/cluster.conf, and change the content to the following:

# ip:port
192.168.209.129:8848
192.168.209.129:8849
192.168.209.129:8850

2. Make three copies of Nacos

[root@localhost bin]# cd /usr/local
新建文件夹命令
[root@localhost java]# mkdir nacos_cluster
复制文件夹命令
[root@localhost java]# cp -r nacos nacos_cluster/nacos_8848
[root@localhost java]# cp -r nacos nacos_cluster/nacos_8849
[root@localhost java]# cp -r nacos nacos_cluster/nacos_8850

3. Change the port numbers in to conf/application.properties:

nacos_8848的叫8848,下面的两个以此类推
server.port=8848
server.port=8849
server.port=8850

3.3.Configure proxy service

3.3.1.Install nginx

• Install nginx dependent libraries

yum -y install gcc pcre pcre-devel zlib zlib-devel openssl openssl-devel

• Download nginx

wget -c https://nginx.org/download/nginx-1.12.0.tar.gz

• Unzip the installation package

tar -zxvf nginx-1.12.0.tar.gz

• Configure nginx installation package

cd nginx-1.12.0

./configure --prefix=/usr/local/nginx

Function : ./configure configures nginx to be installed in the /usr/local/nginx directory

• Compile and install

make && make install

8.3.2. Configure nginx proxy nacos

Modify nginx.conf:

#新建一个参数
upstream nacos {
  server 192.168.209.129:8848;
  server 192.168.209.129:8849;
  server 192.168.209.129:8850;
}
#修改server.location
server {
  listen 80;
  server_name  localhost;
  location / {
    proxy_pass http://nacos;
  }
}

3.3.2. Test nginx

• Enter the nginx toolkit

cd /usr/local/nginx/sbin

• turn on

./nginx

• closure

./nginx -s stop

• Restart

./nginx -s reload

• View status

ps -ef | grep nginx

In the same way, you can also use this command to view nacos:

ps -ef | grep nacos

3.4.Testing

1. Start nacos cluster

[root@localhost upload]# cd /usr/local/nacos_cluster/nacos_8848/bin
[root@localhost bin]# ./startup.sh
[root@localhost bin]# cd /usr/local/nacos_cluster/nacos_8849/bin
[root@localhost bin]# ./startup.sh
[root@localhost bin]# cd /usr/local/nacos_cluster/nacos_8850/bin
[root@localhost bin]# ./startup.sh

2. Start nginx

[root@localhost nginx]# cd /usr/local/nginx/sbin/
[root@localhost sbin]# ./nginx 

3. Register the microservice to the Nacos cluster

4.Access nacos cluster

Start the nacos-config service and access the nacos cluster through nginx: http://192.168.209.129/nacos

4.Nacos starts automatically after booting

4.1.Write startup file

• Add nacos.service file

vim /lib/systemd/system/nacos.service

• The contents of the file are as follows:

[Unit]
Description=nacos
After=network.target

[Service]
Type=forking
ExecStart=/usr/local/nacos/bin/startup.sh -m standalone
ExecReload=/usr/local/nacos/bin/shutdown.sh
ExecStop=/usr/local/nacos/bin/shutdown.sh
PrivateTmp=true

[Install]
WantedBy=multi-user.target

4.2. Modify nacos startup.sh

• The three lines of configuration after modifying the JAVA_HOME path and logging out are as follows:

[ ! -e "$JAVA_HOME/bin/java" ] && JAVA_HOME=/usr/local/jdk1.8.0_191 
#[ ! -e "$JAVA_HOME/bin/java" ] && JAVA_HOME=/usr/java
#[ ! -e "$JAVA_HOME/bin/java" ] && JAVA_HOME=/opt/taobao/java
#[ ! -e "$JAVA_HOME/bin/java" ] && unset JAVA_HOME

4.3. Set up startup

systemctl daemon-reload        #重新加载服务配置
systemctl enable nacos.service #设置为开机启动
systemctl start nacos.service  #启动nacos服务
systemctl stop nacos.service   #停止nacos服务
systemctl status nacos.service   #查看nacos服务的状态

4.4 Testing

• Restart and check the nacos service status

5.Supplement

5.1mysql installation

• Enter a folder and download the YUM library

wget  http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm

• Install YUM library

rpm -ivh mysql57-community-release-el7-10.noarch.rpm

• Install mysql

yum -y install mysql-community-server  --nogpgcheck

• startup and shutdown

#启动
systemctl start mysqld
#关闭
systemctl stop mysqld
#重启
systemctl restart mysqld
#查看状态:
systemctl status mysqld
#设置开机自启:
systemctl enable mysqld

• Log in

#查询默认密码:
grep "password" /var/log/mysqld.log
#登录:
mysql -u root -p
#登出:
exit

• change Password

#修改密码策略
mysql> SET GLOBAL validate_password_policy=LOW;
mysql> SET GLOBAL validate_password_length=4;
#修改密码
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '1111';

• Enable remote login permissions

mysql> use mysql;
mysql> select User,Host from user;
mysql> update user set host ="%" where user = "root";
#刷新
mysql> flush privileges;