golang code deployment-Golang-php.cn

With the continuous development and application of cloud computing technology, more and more enterprises are beginning to deploy applications to the cloud. As an efficient, lightweight, and highly efficient language, golang is favored by more and more companies. So how should we operate when deploying golang applications to the cloud? This article will introduce the golang code deployment process and related technical points in detail.

Preparation work

Before starting golang code deployment, you need to complete the following preparation work:

1.1 Determine the cloud server

First Make sure the cloud server is selected. The mainstream cloud service providers on the market today include Tencent Cloud, Alibaba Cloud, Huawei Cloud, etc. We can choose a cloud server with stable performance, favorable price, and rich functions. Generally speaking, the higher the configuration of the cloud server, the better the performance will be, but the corresponding price will be higher.

1.2 Install the golang environment

Install the golang environment on the cloud server to ensure that the golang code can be compiled and run normally.

Compile golang code

After completing the above preparations, we can start compiling golang code. Golang provides a compiler for each platform, so we can complete the compilation process locally or on a cloud server. Common tools for compiling golang code include the "go build" and "go install" commands. We usually use the "go build" command to compile golang source code into an executable file, as shown below:

$ cd $GOPATH/src/github.com/user/hello
$ go build

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This command will generate an executable named hello in the current directory document. If you use the "go install" command, golang will automatically install the generated executable file into the $GOPATH/bin directory.

$ cd $GOPATH/src/github.com/user/hello
$ go install

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At this point, the executable file will be installed in the $GOPATH/bin directory.

Upload the executable file to the cloud server

After compiling the executable file, we need to upload it to the cloud server. Commonly used upload methods include scp and rsync.

3.1 Use scp to upload files

First, you need to enter the following command in the local terminal to upload the hello file to the remote server.

$ scp -P <port> hello <user>@<host>:<path>

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Parameter description:

-P: Specify the ssh port number
: The ssh port number of the cloud server
hello : Local executable file
: Cloud server username
: Cloud server IP
: Uploaded Target path

Example:

$ scp -P 22 hello root@192.168.10.10:/root

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After the above command is executed, the executable file hello will be uploaded to the /root directory of the cloud server.

3.2 Use rsync to upload files

rsync is a remote file synchronization tool that is more efficient than scp. To use rsync to upload executable files, you need to install rsync on the cloud server first. Then enter the following command in the local terminal:

$ rsync -avP -e 'ssh -p <port>' hello <user>@<host>:<path>

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Parameter description:

-avP: Synchronize content
-e: Use ssh communication, -p specifies the ssh port No.
: SSH port number of the remote server
hello: Local executable file
: User name of the remote server
: IP of the remote server
: Upload target path

Example:

$ rsync -avP -e 'ssh -p 22' hello root@192.168.10.10:/root

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After the above command is executed, The executable file hello will be uploaded to the /root directory of the cloud server.

Run the executable file

After uploading the executable file to the cloud server, we need to run it on the cloud server. We can use ssh to open a terminal window on the cloud server, and then enter the following command:

$ ./hello

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where hello is the name of the executable file we uploaded. If everything goes well, you should be able to see the program execution results.

The program runs in the background

Generally, we want to run the program in the background instead of occupying the terminal window. We can use the nohup command to run the program in the background. For example, if we want to run the hello program in the background on the cloud server, we can enter the following command:

$ nohup ./hello &

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The program will run in the background and save the output information to the nohup.out file.

Use the Supervisor management program

nohup command to run the program in the background, but if an error or crash occurs in the program, we cannot get notification quickly and handle it. Therefore, we need to use management tools to manage the program. One of the more commonly used tools is Supervisor.

6.1 Install Supervisor

Supervisor can download the latest installation package from the official website. The installation process is relatively simple. We can choose the corresponding installation method according to different operating systems.

For example, in Centos7 system, you can use the following command to install:

$ yum install -y python-setuptools
$ easy_install supervisor

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After the installation is complete, you can use the following command to check the version:

$ supervisord -v

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6.2 Configure Supervisor

The Supervisor configuration file is /etc/supervisord.conf. We can add the following content to this file to register our program with Supervisor.

[program:hello]
command=/path/to/hello
directory=/path/to/hello/dir
autostart=true
autorestart=true
stdout_logfile=/var/log/hello.stdout.log
stderr_logfile=/var/log/hello.stderr.log

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Parameter description:

[program:hello]：程序名
command：启动命令
directory：程序所在目录
autostart、autorestart：表示程序是否自动启动和重启
stdout_logfile：标准输出日志的路径
stderr_logfile：错误日志的路径

以上配置中，我们将程序名设置为"hello"，command设置为hello可执行文件路径，directory设置为hello可执行文件所在目录，让程序自动启动和重启，同时将标准输出日志和错误日志分别保存到/var/log/hello.stdout.log和/var/log/hello.stderr.log。

6.3 启动Supervisor服务

配置完成后，我们需要启动Supervisor服务。在Centos7系统中，可以使用以下命令启动：