Chapter III Consul Service registration and service enquiry

1. Define a service

Https://www.consul.io/docs/agent/services.html

This method is the most common way to provide services in a service registration.

About the service definition: properties of the service we will each appear in the back of a summary one, and finally do a summary.

2. Service Registration

2.1. Create the folder where the service files are stored

Description

• . D Suffix: Indicates the directory where a series of configuration files are stored (directory)

2.2. Create a service and write to a file in the above folder

Description

• A service we will configure as JSON format : For example, the form between the single quotation marks above
• A service is written in a JSON file

Attention:

• If the above folder does not have permission to operate, change the folder permissions first,

3. Service Enquiry

Start the consul process first.

Toggle Screen--

Description

• Start the service according to the files in the directory that-config-dir specifies according to the service registration.

Two ways of querying:DNS and HTTP

3.1. DNS:

Name of the service visited:

• tag. servicename. Service.consul tag and servicename are all configured when the service is created
• The DNS access port is 8600

3.2. HTTP:

Description

• Access path: host:port/ version number /catalog/service/service name
• Address: Used to specify the IP address of a specific service, by default, the agent used by the service.

4, multiple service registration situation

4.1, each service registered to a file

Assuming that a Secondservice service is now created, I will write the service to the Secondservice.json file as follows:

Use HTTP to access:

Description: Access According to the name of the service.

4.2, multiple services written in the same JSON file

Description

• In services rather than service (the single-file service on the top is placed in services)
• Multiple services placed inside an array

Use HTTP to access:

Description: Access According to the name of the service.

Note: In the actual development, the number of micro-services,

If each file is placed in a file, the file will be very many, not good!

If all microservices are placed in a file, the file is too large and not good!

Therefore, they need to be combined . For example, suppose you have 100 microservices, put in 10 JSON files, and each JSON file holds 10 services.

Article reference from: https://www.consul.io/intro/getting-started/services.html

Chapter III Consul Service registration and service enquiry