Shulou(Shulou.com)06/03 Report--

Preface

This article aims to demonstrate the new development model of serverless web through the example of rapidly deploying a wordpress website to Ali Cloud function Computing platform, including the ability of FUN tools to initialize NAS with one click, synchronize the website to NAS and deploy with one click, and demonstrate the agility of function computing, automatic auto scaling, operation-free and comprehensive monitoring facilities.

Related reference documentation: https://yq.aliyun.com/articles/640912

1.1 DEMO Overview DEMO sample effects entry: http://hz.mofangdegisn.cn account: fc-test-user password: fc-test-pwdDEMO sample project address: fc-wordpress

Activate the service

Free function calculation, pay by quantity, function calculation has a large amount of free.

Free activation of file storage service NAS, paid by quantity

1.2 solution

As shown in the figure above, when multiple users access the web service through the url provided externally, it doesn't matter if there are hundreds or thousands of requests per second. The function computing platform will automatically scale to provide enough execution instances to respond to users' requests. At the same time, function computing provides comprehensive monitoring facilities to monitor the operation of your functions.

1.3 comparison between Serverless scheme and traditional self-built web scheme ITEM cost stability is based on VM scheme using ecs.t5-lc1m1.small, 22.8CNY / month server and database in the same VM, both have no active and standby disaster recovery. At the same time, the performance of the host of this specification is weak and lightweight application server 60 CNY / month (1vCPU 1GB 1Mbps 20GB [ssd]) server and database are in the same VM, both have no active and standby disaster recovery. At the same time, the performance weak function of the host of this specification calculates that the sqlite3 version is about 1 yuan / month, and the mysql version is about 26 yuan / month high.

Function to calculate the full cost details:

The first 1 million function calls per month are free, the first 400000 (GB* seconds) per month is free, and the memory of the function can be set to 128m or 256m. Therefore, for a website with less than 1 million visits a month, this is free for low-cost websites, assuming that the public network traffic generated in a month is 1GB, 0.8 yuan NAS, US$0.06/GB/Month, and the site size is 50m, even if calculated according to 1G. 0.42 yuan for the most basic stand-alone version of RDS mysql, 25 yuan per month

Function calculation Billing | NAS pricing

As mentioned above, in the field of low-cost websites, function computing has a very obvious cost advantage while maintaining flexibility. In the future, when the business scale becomes larger, there is no technology switching cost (what may need to be done is to replace a stronger relational database). At the same time, the financial cost growth combined with prepaid can be kept smooth. Low-cost websites become high-availability, high-performance sites as smooth as silk. For details of high-performance sites, please refer to the Q1 question in FAQ at the end of the article.

Function calculation runs the principle of PHP framework

Before the specific operation and deployment, simply comb through the function calculation and run the principle of PHP framework.

2.1 operating principle of traditional server PHP

Principle schematic diagram

A simple nginx conf

From the schematic diagram above, we can see that the Web server gives the PHP script to php-fpm to parse according to the location in conf, and then returns the parsed result to the client side.

2.2 Engineering principle of FC driving PHP

The example of the execution environment of function calculation is equivalent to the Apache/Nginx user function of traditional web service, which is equivalent to the conf implementing Apache/Nginx. Location users deploy the Web website in NAS, and then mount the NAS to the function execution environment. For example, the / mnt/auto directory in the following code is as simple as the WordPress entry function code: index.php

Function calculation provides users with a $GLOBALS ['fcPhpCgiProxy'] object to interact with php-fpm and parse the php file in the PHP project. This object provides two important interfaces:

RequestPhpCgi

RequestPhpCgi ($request, $docRoot, $phpFile = "index.php", $fastCgiParams = [], $options = []) $request: consistent with the parameters of the php http invoke entry $docRoot: root directory of the Web project $phpFile: default parameter for splicing SCRIPT_FILENAME in cgi parameters $fastCgiParams: function calculation internally try to construct default cgi params for you based on $request, but if you don't want it, you can use $fastCgiParams to override some parameters (reference: cgi) $options: array type, optional parameters If debug_show_cgi_params is set to true, the cgi parameter for each request for php resolution will be printed. The default is false. ReadWriteTimeout sets the time for parsing. Default is 5 seconds.

If you are interested, you can learn about the following function calculating PHP Runtime:

PHP entry function PHP execution environment case operation steps preparation conditions

Free function calculation, pay by quantity, function calculation has a large amount of free.

Free activation of file storage service NAS, paid by quantity

There is a domain name, such as abc.com, and the domain name CNAME is resolved to the region corresponding to function calculation (FC)

If you want to deploy the wordpres website in region in Hangzhou, resolve the abc.com CNAME to 12345.cn-hangzhou.fc.aliyuncs.com, of which 12345 is your accountId

3.1 install the latest Fun tool installation version 8.x latest version or 10.x, 12.x nodejs installation funcraf3.2 Clone project

Git clone https://github.com/awesome-fc/fc-wordpress.git

3.3 go to different directories according to the database you need to copy the .env _ example file to .env, and modify the information in .env to your own.

If you are using a mysql database, refer to Section 3.3.1

If you are using a sqlite3 database, refer to Section 3.3.2

3.3.1 using the mysql database

Enter the directory fc-wp-mysql

Fun nas initfun nas info

Fun nas init: initialize NAS, get based on the information in your .env (there is already a nas that meets the criteria) or create a nas available with region

If you have not changed the configuration service name in templata.yml, you can proceed to the next step If there are modifications, a new directory will be generated in the current directory. Fun/nas/auto-default/ {serviceName} (fun nas info can list new directories), copy the wordpress directory of .fun / nas/auto-default/fc-wp-mysql/wordpress under the default directory to .fun/nas/auto-default/ {serviceName}, and delete the directory .fun / nas/auto-default/fc-wp-mysql/wordpress.

Upload wordpress website to NASfun nas syncfun nas ls nas:///mnt/auto/

Fun nas sync: upload the content (.fun / nas/auto-default/fc-wp-mysql) from the local NAS to the fc-wp-mysql directory in NAS

Fun nas ls nas:///mnt/auto/: check to see if we have uploaded the file to NAS correctly

3.3.2 using the sqlite3 database

Enter the directory fc-wp-sqlite

Fun nas initfun nas info

Fun nas init: initialize NAS, get based on the information in your .env (there is already a nas that meets the criteria) or create a nas available with region

If you have not changed the configuration service name in templata.yml, you can proceed to the next step If there are modifications, a new directory will be generated in the current directory. Fun/nas/auto-default/ {serviceName} (fun nas info can list new directories), copy the wordpress directory of .fun / nas/auto-default/fc-wp-sqlite/wordpress under the default directory to .fun/nas/auto-default/ {serviceName}, and delete the directory .fun / nas/auto-default/fc-wp-sqlite/wordpress.

Complete the installation process locally and initialize the sqlite3 database

Enter the command in the directory .fun / nas/auto-default/fc-wp-sqlite/wordpress:

Php-S 0.0.0.0purl 80

Modify the host file to add 127.0.0.1 hz.mofangdegisn.cn

Linux/mac: vim / etc/hostswindows7: C:\ Windows\ System32\ drivers\ etc

Hz.mofangdegisn.cn is the domain name you prepared in advance.

Enter hz.mofangdegisn.cn through the browser. There is no mysql database setup page at this time, and the wordpress installation process is completed.

After successful installation, at this time, there should be a database directory under .fun / nas/auto-default/fc-wp-sqlite/wordpress/wp-content, ls-a, and the sqlite3 database file .ht.sqlite should be available.

Rollback changes to the host file

Note: the purpose of modifying host in the middle is to initialize the sqlite3 database, base site url is the domain name prepared in advance, not 127.0.0.1 upload the wordpress website to NASfun nas syncfun nas ls nas:///mnt/auto/

Fun nas sync: upload the content (.fun / nas/auto-default/fc-wp-sqlite) from the local NAS to the fc-wp-sqlite directory in NAS

Fun nas ls nas:///mnt/auto/: check to see if we have uploaded the file to NAS correctly

3.4 deploy functions to the FC platform

Next, deploy the function to the cloud platform:

Modify the value in $host in index.php to modify the Project in template.yml LogConfig, and you can modify the template.yml custom domain name to execute fun deploy for your prepared domain name by taking any name that will not be duplicated.

Log in to the console https://fc.console.aliyun.com, and you can see that the service and function have been created successfully, and the service has been configured correctly.

Open your previously configured domain name through a browser, such as hz.mofangdegisn.cn in this example

Mysql version of the database, can be directly like the traditional wordpress, directly into the installation process of the sqlite3 version of the database, as the initialization has been completed before, you can directly enter the website home page or website background FAQQ1: can function calculation develop high-performance and high-availability websites?

A: yes, a single instance with multiple concurrent functions and high-performance databases calculated by functions

Select high-performance relational databases for single instance and multiple concurrency, such as highly available cloud database POLARDB

It is necessary to add these optimizations:

Reserved instances eliminate cold start + prepaid optimization cost very fast NASOSS object storage + CDN to store and distribute static resources

At present, PHP Runtime does not support the concurrence of multiple single instances. With Custom Runtime, the website developed based on the traditional mode nginx + php-fpm + mysql can be directly, simply and seamlessly migrated to the function computing platform. The example project customruntime-php

Using OSS to separate the movement and movement of Wordpress pictures

Q2: using a low-cost sqlite3 version of the website, what if the cold start is slow for the first time?

A: use a timer trigger function keep warm

Q3: how much qps can a website that uses a low-cost version of sqlite3 support?

A: it is determined by the performance of sqlite3 database. Here are some stress test results:

Every time the pressure increases, there is some cold start, the time is slow, but the support from the stress test results to support 50 QPS is no doubt, it is enough to support some small and medium-sized websites.

Q4: is it possible to use other languages to develop serverless websites based on functional computing?

A: yes, such as python: https://yq.aliyun.com/articles/603249, or use custom runtime directly, with built-in java, python and node, Custom Runtime user manual, Custom Runtime usage highlights

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