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Provision a Database and Import a SQL File for initialization

This tutorial will talk about how to provision a relational database with SQL file imported, and bootstrap an application which depends on the database.

Favorite Links is an interesting project which can store all your favorite web links in one application. It is using Node.js and MySQL. It has been built into a container image oamdev/nodejs-mysql-links:v0.0.1. Let's bootstrap the application and see how to provision a database, and import a SQL file (which means to create tables, and insert data into them if needed).

Currently, it only works on Alibaba Cloud ComponentDefinition alibaba-rds-preview is the feature preview for Alibaba Cloud RDS, and will be merged into alibaba-rds later.

How it works#

Feel free to skip this section if you are not interested.

Alibaba Cloud RDS Preview supports importing SQL file when create an RDS instance with these properties:

NameDescriptionTypeRequiredDefault
sql_fileThe name of SQL file in the bucket, like db.sqlstringfalse
sql_bucket_nameThe bucket name of the SQL file. like oss://examplestringfalse
sql_bucket_endpointThe endpoint of the bucket. like oss-cn-hangzhou.aliyuncs.comstringfalse

After an RDS database is created, the SQL file from OSS bucket will be imported into the database by the power of Terraform local-exec provisioner which is referenced by Alibaba Cloud RDS Preview ComponentDefinition.

Prerequisites#

Let's say we have an OSS bucket oss://favorite-links which contains a SQL file db.sql in it, and the bucket endpoint is oss-cn-hongkong.aliyuncs.com.

Provision cloud resources#

Use the following Application to provision a database links, import the SQL file db.sql, and bootstrap the application Favorite Links.

apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
name: favorite-links
spec:
components:
- name: web
type: webservice
properties:
image: oamdev/nodejs-mysql-links:v0.0.1
port: 4000
traits:
- type: service-binding
properties:
envMappings:
DATABASE_HOST:
secret: db-conn
key: DB_PUBLIC_HOST
DATABASE_NAME:
secret: db-conn
key: DATABASE_NAME
DATABASE_USER:
secret: db-conn
key: DB_USER
DATABASE_PASSWORD:
secret: db-conn
key: DB_PASSWORD
- name: db
type: alibaba-rds
properties:
instance_name: favorite-links
database_name: links
account_name: oamtest
password: U34rfwefwefffaked
security_ips: [ "0.0.0.0/0" ]
privilege: ReadWrite
sql_file: db.sql
sql_bucket_endpoint: oss-cn-hongkong.aliyuncs.com
sql_bucket_name: oss://favorite-links
writeConnectionSecretToRef:
name: db-conn

After the application is successfully deployed, you can access the web application by the following URL:

$ vela ls
APP COMPONENT TYPE TRAITS PHASE HEALTHY STATUS CREATED-TIME
favorite-links web webservice service-binding running healthy Ready:1/1 2022-02-21 14:15:45 +0800 CST
└─ db alibaba-rds-preview running healthy Cloud resources are deployed and ready to use 2022-02-21 14:15:45 +0800 CST
$ vela port-forward favorite-links 4000:4000
Forwarding from 127.0.0.1:4000 -> 4000
Forwarding from [::1]:4000 -> 4000
Forward successfully! Opening browser ...
Handling connection for 4000
Handling connection for 4000

Next#

Last updated on by Jianbo Sun