The Ultimate Guide to High Availability with MariaDB

Listener Resource

Listener Resource

A listener resource represents a listener of a service in MaxScale. All listeners point to a service in MaxScale.

Resource Operations

Get a listener

GET /v1/listeners/:name

Get a single listener. The :name in the URI must be the name of a listener in MaxScale.

Response

Status: 200 OK

{
    "data": {
        "attributes": {
            "parameters": {
                "address": "::",
                "authenticator": null,
                "authenticator_options": "",
                "connection_init_sql_file": null,
                "port": 4006,
                "protocol": "MariaDBClient",
                "socket": null,
                "sql_mode": null,
                "ssl": "false",
                "ssl_ca_cert": null,
                "ssl_cert": null,
                "ssl_cert_verify_depth": 9,
                "ssl_cipher": null,
                "ssl_crl": null,
                "ssl_key": null,
                "ssl_verify_peer_certificate": false,
                "ssl_verify_peer_host": false,
                "ssl_version": "MAX"
            },
            "state": "Running"
        },
        "id": "RW-Split-Listener",
        "relationships": {
            "services": {
                "data": [
                    {
                        "id": "RW-Split-Router",
                        "type": "services"
                    }
                ],
                "links": {
                    "related": "http://localhost:8989/v1/services/",
                    "self": "http://localhost:8989/v1/listeners/RW-Split-Listener/relationships/services/"
                }
            }
        },
        "type": "listeners"
    },
    "links": {
        "self": "http://localhost:8989/v1/listeners/RW-Split-Listener"
    }
}

Get all listeners

GET /v1/listeners

Get all listeners.

Response

Status: 200 OK

{
    "data": [
        {
            "attributes": {
                "parameters": {
                    "address": "::",
                    "authenticator": null,
                    "authenticator_options": "",
                    "connection_init_sql_file": null,
                    "port": 4008,
                    "protocol": "MariaDBClient",
                    "socket": null,
                    "sql_mode": null,
                    "ssl": "false",
                    "ssl_ca_cert": null,
                    "ssl_cert": null,
                    "ssl_cert_verify_depth": 9,
                    "ssl_cipher": null,
                    "ssl_crl": null,
                    "ssl_key": null,
                    "ssl_verify_peer_certificate": false,
                    "ssl_verify_peer_host": false,
                    "ssl_version": "MAX"
                },
                "state": "Running"
            },
            "id": "Read-Connection-Listener",
            "relationships": {
                "services": {
                    "data": [
                        {
                            "id": "Read-Connection-Router",
                            "type": "services"
                        }
                    ],
                    "links": {
                        "related": "http://localhost:8989/v1/services/",
                        "self": "http://localhost:8989/v1/listeners/Read-Connection-Listener/relationships/services/"
                    }
                }
            },
            "type": "listeners"
        },
        {
            "attributes": {
                "parameters": {
                    "address": "::",
                    "authenticator": null,
                    "authenticator_options": "",
                    "connection_init_sql_file": null,
                    "port": 4006,
                    "protocol": "MariaDBClient",
                    "socket": null,
                    "sql_mode": null,
                    "ssl": "false",
                    "ssl_ca_cert": null,
                    "ssl_cert": null,
                    "ssl_cert_verify_depth": 9,
                    "ssl_cipher": null,
                    "ssl_crl": null,
                    "ssl_key": null,
                    "ssl_verify_peer_certificate": false,
                    "ssl_verify_peer_host": false,
                    "ssl_version": "MAX"
                },
                "state": "Running"
            },
            "id": "RW-Split-Listener",
            "relationships": {
                "services": {
                    "data": [
                        {
                            "id": "RW-Split-Router",
                            "type": "services"
                        }
                    ],
                    "links": {
                        "related": "http://localhost:8989/v1/services/",
                        "self": "http://localhost:8989/v1/listeners/RW-Split-Listener/relationships/services/"
                    }
                }
            },
            "type": "listeners"
        }
    ],
    "links": {
        "self": "http://localhost:8989/v1/listeners/"
    }
}

Create a new listener

POST /v1/listeners

Creates a new listener. The request body must define the following fields.

  • data.id

  • Name of the listener

  • data.type

  • Type of the object, must be listeners

  • data.attributes.parameters.port OR data.attributes.parameters.socket

  • The TCP port or UNIX Domain Socket the listener listens on. Only one of the fields can be defined.

  • data.relationships.services.data

  • The service relationships data, must define a JSON object with an id value that defines the service to use and a type value set to services.

The following is the minimal required JSON object for defining a new listener.

{
    "data": {
        "id": "my-listener",
        "type": "listeners",
        "attributes": {
            "parameters": {
                "port": 3306
            }
        },
        "relationships": {
            "services": {
                "data": [
                    {"id": "RW-Split-Router", "type": "services"}
                ]
            }
        }
    }
}

Refer to the Configuration Guide for a full list of listener parameters.

Response

Listener is created:

Status: 204 No Content

Destroy a listener

DELETE /v1/listeners/:name

The :name must be a valid listener name. When a listener is destroyed, the network port it listens on is available for reuse.

Response

Listener is destroyed:

Status: 204 No Content

Listener cannot be deleted:

Status: 403 Forbidden

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