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MaxScale 21.06 Session Resource

Session Resource

A session is an abstraction of a client connection, any number of related backend connections, a router module session and possibly filter module sessions. Each session is created on a service and each service can have multiple sessions.

Resource Operations

Get a session

GET /v1/sessions/:id

Get a single session. :id must be a valid session ID. The session ID is the same that is exposed to the client as the connection ID.

This endpoint also supports the rdns=true parameter, which instructs MaxScale to perform reverse DNS on the client IP address. As this requires communicating with an external server, the operation may be expensive.

Response

Status: 200 OK

{
    "data": {
        "attributes": {
            "client": {
                "cipher": ""
            },
            "connected": "Thu Jul 20 15:20:16 2023",
            "connections": [
                {
                    "cipher": "",
                    "connection_id": 9,
                    "server": "server1"
                },
                {
                    "cipher": "",
                    "connection_id": 9,
                    "server": "server2"
                }
            ],
            "idle": 0.0,
            "log": [],
            "parameters": {
                "log_error": false,
                "log_info": false,
                "log_notice": false,
                "log_warning": false
            },
            "port": 43050,
            "queries": [],
            "remote": "::ffff:127.0.0.1",
            "state": "Session started",
            "user": "maxuser"
        },
        "id": "1",
        "links": {
            "self": "http://localhost:8989/v1/sessions/1/"
        },
        "relationships": {
            "services": {
                "data": [
                    {
                        "id": "RW-Split-Router",
                        "type": "services"
                    }
                ],
                "links": {
                    "related": "http://localhost:8989/v1/services/",
                    "self": "http://localhost:8989/v1/sessions/1/relationships/services/"
                }
            }
        },
        "type": "sessions"
    },
    "links": {
        "self": "http://localhost:8989/v1/sessions/1/"
    }
}

Get all sessions

GET /v1/sessions

Get all sessions.

Response

Status: 200 OK

{
    "data": [
        {
            "attributes": {
                "client": {
                    "cipher": ""
                },
                "connected": "Thu Jul 20 15:20:16 2023",
                "connections": [
                    {
                        "cipher": "",
                        "connection_id": 9,
                        "server": "server1"
                    },
                    {
                        "cipher": "",
                        "connection_id": 9,
                        "server": "server2"
                    }
                ],
                "idle": 0.0,
                "log": [],
                "parameters": {
                    "log_error": false,
                    "log_info": false,
                    "log_notice": false,
                    "log_warning": false
                },
                "port": 43050,
                "queries": [],
                "remote": "::ffff:127.0.0.1",
                "state": "Session started",
                "user": "maxuser"
            },
            "id": "1",
            "links": {
                "self": "http://localhost:8989/v1/sessions/1/"
            },
            "relationships": {
                "services": {
                    "data": [
                        {
                            "id": "RW-Split-Router",
                            "type": "services"
                        }
                    ],
                    "links": {
                        "related": "http://localhost:8989/v1/services/",
                        "self": "http://localhost:8989/v1/sessions/1/relationships/services/"
                    }
                }
            },
            "type": "sessions"
        }
    ],
    "links": {
        "self": "http://localhost:8989/v1/sessions/"
    }
}

Update a Session

PATCH /v1/sessions/:id

The request body must be a JSON object which represents the new configuration of the session. The :id must be a valid session ID that is active.

The log_debug, log_info, log_notice, log_warning and log_error boolean parameters control whether the associated logging level is enabled:

{
    "data": {
        "attributes": {
            "parameters": {
                "log_info": true
            }
        }
    }
}

The filters that a session uses can be updated by re-defining the filter relationship of the session. This causes new filter sessions to be opened immediately. The old filter session are closed and replaced with the new filter session the next time the session is idle. The order in which the filters are defined in the request body is the order in which the filters are installed, similar to how the filter relationship for services behaves.

{
    "data": {
        "attributes": {
            "relationships": {
                "filters": {
                    "data": [
                        { "id": "my-cache-filter" },
                        { "id": "my-log-filter" }
                    ]
                }
            }
        }
    }
}

Response

Session is modified:

Status: 204 No Content

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