PHP implements open source Ansible automated operation and maintenance tool

Ansible is an excellent automated operation and maintenance tool that can be used to automate system configuration, software installation, application deployment and other tasks. As an open source tool, Ansible is widely used and supported. This article will introduce how to use PHP to write a simple Ansible extension to facilitate PHP developers to use Ansible for automated operation and maintenance.

1. Basic use of Ansible

Before we start to explain how to use PHP to implement Ansible extension, let’s first understand the basic use of Ansible.

Ansible is developed based on Python language and executes commands through SSH. Its main features are:

1. Zero Agent and Agentless, that is, there is no need to install any services or software on the target machine, and you can directly use the SSH protocol to execute commands.
2. The configuration is simple and only requires one control machine and several target machines.
3. Supports automated deployment, system configuration, software installation, application deployment and other tasks.
4. A series of tasks can be defined through Playbook to realize automated configuration of multiple hosts.
5. Supports a variety of modules to enable automated operation and maintenance of multiple systems.

2. PHP implements Ansible extension

Ansible is an automated operation and maintenance tool developed based on the Python language, while PHP is a language widely used in Web development. How to use Ansible in PHP has become a direction that some PHP developers are exploring. Next we will introduce how to implement Ansible extension through PHP.

1. Install PHP extension

First, we need to install the PHP extension. PHP provides an extension called php-ssh2 for remote connection to the server through the SSH protocol. We can install it through the following command:

sudo apt-get install libssh2-1-dev libssh2-1
sudo pecl install ssh2-1.2

After the installation is complete, you can use the ssh2 extension in PHP.

2. Writing PHP code

Next, let’s write PHP code. PHP is a very flexible language. We can implement some functions of Ansible by writing functions. Here, we take Ansible's ssh module as an example to implement a function named ansible_exec(), which can be used to execute commands on the specified target machine.

function ansible_exec($hosts, $command) {
    $ssh = new SSH2($hosts);  // 建立 SSH 连接
    if(!$ssh->login("username", "password")) {  // 登录目标机器
        exit('Failed to login');
    }
    $stream = $ssh->exec($command);  // 在目标机器上执行命令
    return $stream;
}

This function accepts two parameters. The first parameter is the IP address or domain name of the target machine, and the second parameter is the command to be executed. This function executes the command on the target machine and returns the execution result.

3. Using PHP extension

With the above code, we can easily use Ansible in PHP for automated operation and maintenance. For example, we can use the following code to execute a command:

$result = ansible_exec("192.168.1.1", "ls -la");
echo $result;

4. Optimization

Although the above code can execute Ansible through PHP, there are still some problems. For example, the code has low security and does not verify the legality of the command. Additionally, the code performs complex tasks less efficiently.

In order to solve these problems, you can consider using the Ansible command line tool or Ansible API to replace the above code. The Ansible command line tool provides more functions and options, but requires Ansible to be installed on the control machine and target machine. The Ansible API can execute Ansible Playbook without installing Ansible.

3. Summary

This article introduces how to use PHP to write a simple Ansible extension. Through this extension, PHP developers can easily use Ansible for automated operation and maintenance. In practical applications, we can further optimize this extension to improve efficiency and security.

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