Detailed tutorial on pm2 deployment of node.js project

This time I will bring you a detailed tutorial on pm2 deploying node.js project. What are the precautions for pm2 deploying node.js project. The following is a practical case, let’s take a look.

As a front-end, I was confused about how to deploy the written project to the server, but I was still very interested in it and decided to give it a try and just do it.

1. Buy a domain name and server

To deploy a project, you must buy a domain name. This is essential. I found that Tencent Cloud has Free servers are available (only free for 7 days), so I bought a domain name from Tencent Cloud and got a free server from Tencent Cloud. Of course, you will be authenticated by your real name during this period.

Buy a domain name

Get a server

Choose CentOS server in Tencent Cloud, next Perform domain name resolution, and then set up the server (account and password, etc.)

Domain name resolution

2. Deploy Node. js environment

(1) Log in to the server and update it first (update it first when using the server for the first time)

yum update -y

(2) Install node and pm2

wget command downloads the Node.js installation package. The installation package is a compiled file. After decompression, node and npm already exist in the bin folder, so there is no need to recompile.

wget https://nodejs.org/dist/v8.9.3/node-v8.9.3-linux-x64.tar.xz

Unzip the file.

tar xvf node-v8.9.3-linux-x64.tar.xz

Create soft links to make node and npm commands globally valid. By creating soft links, you can directly use node and npm commands in any directory:

ln -s /root/node-v8.9.3-linux-x64/bin/node /usr/local/bin/node
ln -s /root/node-v8.9.3-linux-x64/bin/npm /usr/local/bin/npm

View node and npm versions.

node -v
npm -v

At this point, the Node.js environment has been installed. The software is installed in the /root/node-v8.9.3-linux-x64/ directory by default. If you need to install the software to other directories (such as: /opt/node/), please do the following:

mkdir -p /opt/node/
mv /root/node-v8.9.3-linux-x64/* /opt/node/
rm -f /usr/local/bin/node
rm -f /usr/local/bin/npm
ln -s /opt/node/bin/node /usr/local/bin/node
ln -s /opt/node/bin/npm /usr/local/bin/npm

Install pm2

npm install pm2@latest -g

Create a soft link to make the pm2 command globally valid

ln -s /root/node-v8.9.3-linux-x64/bin/pm2 /usr/local/bin/pm2

3. Deploy the project to the server using git

First enter the server root directory, display the contents of the root directory folder, and then Go to the var directory, create a www folder under the var directory, display the content under the var folder, then enter the www folder, and follow the commands

cd /
ls
cd var
ls
mkdir www
cd www

last picture

Then git clone the project in your warehouse

First install git and use the following command

yum install git
y

to enter your project

As you can see in the picture above, there is a file that is not an express project. It is the pm2 configuration file. The configuration method of pm2 is http://pm2.keymetrics. io/docs/usage/cluster-mode/

The following is the configuration in my project (newbie, if you have any questions, experts can give me some advice)

{
 "apps": [
  {
   "name": "app1",
   "script": "bin/www",
   "log_date_format": "YYYY-MM-DD HH:mm:SS",
   "log_file": "logs/app1.log",
   "error_file": "logs/app1-err.log",
   "out_file": "logs/app1-out.log",
   "pid_file": "pids/app1.pid",
   "instances": 1,
   "min_uptime": "200s",
   "max_restarts": 10,
   "max_memory_restart": "1M",
   "cron_restart": "1 0 * * *",
   "watch": false,
   "merge_logs": true,
   "exec_interpreter": "node",
   "exec_mode": "cluster_mode",
   "autorestart": true,
   "vizion": false
  }
 ]
}

Four, Start the project

pm2 start processes.json

Close the project

先查找ID
pm2 status
然后，停止相应项目的id
pm2 stop id

Start the corresponding project again

先查找ID
pm2 status
然后，开启相应项目的id
pm2 start id

Set pm2 to start automatically after booting

pm2 startup
pm2 save

The reason why pm2 is used to start the project is because the node project can still run after exiting the server connection.

The project has been deployed, but the port in the project can only be port 80. The backend master told me that nginx can be used as a proxy server. And told the installation method.

5. Install nginx and configure nginx

Install nginx

yum install nginx

Configure nginx

进入配置的文件夹目录，编辑nginx.conf 文件，也可以在conf.d文件夹下新建后缀名为.conf的文件

cd /
cd etc/nginx
vim nginx.conf

来张图

这里用到了vim编辑器的使用方法，可在网上搜使用方法

简单提几个使用方法,直接按键盘

i  编辑
Esc 退出编辑
:q  退出vim编辑器
:wq 保存并退出vim编辑器

下边是我的nginx配置（新手，有问题大神可以指点下）

启动nginx

service nginx start

这样nginx就运行了。

每次修改完nginx配置都要重启下，用下边的命令

service nginx reload

设置nginx开机自动启动

ln -s /bin/systemctl /usr/local/bin/systemcel
systemcel enable nginx

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