MaxScale 21.06 Server Resource
Server Resource
A server resource represents a backend database server.
Resource Operations
The :name in all of the URIs must be the name of a server in MaxScale.
Get a server
GET /v1/servers/:name
Get a single server.
Response
Status: 200 OK
{ "data": { "attributes": { "gtid_binlog_pos": "0-3000-5", "gtid_current_pos": "0-3000-5", "last_event": "master_up", "lock_held": null, "master_group": null, "master_id": -1, "name": "server1", "node_id": 3000, "parameters": { "address": "127.0.0.1", "disk_space_threshold": null, "extra_port": 0, "max_routing_connections": 0, "monitorpw": null, "monitoruser": null, "persistmaxtime": "0ms", "persistpoolmax": 0, "port": 3000, "priority": 0, "proxy_protocol": false, "rank": "primary", "socket": null, "ssl": false, "ssl_ca_cert": null, "ssl_cert": null, "ssl_cert_verify_depth": 9, "ssl_cipher": null, "ssl_key": null, "ssl_verify_peer_certificate": false, "ssl_verify_peer_host": false, "ssl_version": "MAX" }, "read_only": false, "replication_lag": 0, "server_id": 3000, "slave_connections": [], "source": { "file": "/etc/maxscale.cnf", "type": "static" }, "state": "Master, Running", "state_details": null, "statistics": { "active_operations": 0, "adaptive_avg_select_time": "0ns", "connection_pool_empty": 0, "connections": 1, "failed_auths": 0, "max_connections": 1, "max_pool_size": 0, "persistent_connections": 0, "response_time_distribution": { "read": { "distribution": [ { "count": 0, "time": "0.000001", "total": 0.0 }, { "count": 0, "time": "0.000010", "total": 0.0 }, { "count": 0, "time": "0.000100", "total": 0.0 }, { "count": 1, "time": "0.001000", "total": 0.00022808 }, { "count": 0, "time": "0.010000", "total": 0.0 }, { "count": 0, "time": "0.100000", "total": 0.0 }, { "count": 0, "time": "1.000000", "total": 0.0 }, { "count": 0, "time": "10.000000", "total": 0.0 }, { "count": 0, "time": "100.000000", "total": 0.0 }, { "count": 0, "time": "1000.000000", "total": 0.0 }, { "count": 0, "time": "10000.000000", "total": 0.0 }, { "count": 0, "time": "100000.000000", "total": 0.0 } ], "operation": "read", "range_base": 10 }, "write": { "distribution": [ { "count": 0, "time": "0.000001", "total": 0.0 }, { "count": 0, "time": "0.000010", "total": 0.0 }, { "count": 0, "time": "0.000100", "total": 0.0 }, { "count": 1, "time": "0.001000", "total": 0.00053516399999999997 }, { "count": 0, "time": "0.010000", "total": 0.0 }, { "count": 0, "time": "0.100000", "total": 0.0 }, { "count": 0, "time": "1.000000", "total": 0.0 }, { "count": 0, "time": "10.000000", "total": 0.0 }, { "count": 0, "time": "100.000000", "total": 0.0 }, { "count": 0, "time": "1000.000000", "total": 0.0 }, { "count": 0, "time": "10000.000000", "total": 0.0 }, { "count": 0, "time": "100000.000000", "total": 0.0 } ], "operation": "write", "range_base": 10 } }, "reused_connections": 0, "routed_packets": 2, "total_connections": 1 }, "triggered_at": "Thu, 20 Jul 2023 15:20:06 GMT", "version_string": "10.5.19-MariaDB-1:10.5.19+maria~ubu2004-log" }, "id": "server1", "links": { "self": "http://localhost:8989/v1/servers/server1/" }, "relationships": { "monitors": { "data": [ { "id": "MariaDB-Monitor", "type": "monitors" } ], "links": { "related": "http://localhost:8989/v1/monitors/", "self": "http://localhost:8989/v1/servers/server1/relationships/monitors/" } }, "services": { "data": [ { "id": "RW-Split-Router", "type": "services" }, { "id": "Read-Connection-Router", "type": "services" } ], "links": { "related": "http://localhost:8989/v1/services/", "self": "http://localhost:8989/v1/servers/server1/relationships/services/" } } }, "type": "servers" }, "links": { "self": "http://localhost:8989/v1/servers/server1/" } }
Get all servers
GET /v1/servers
Response
Response contains a resource collection with all servers.
Status: 200 OK
{ "data": [ { "attributes": { "gtid_binlog_pos": "0-3000-5", "gtid_current_pos": "0-3000-5", "last_event": "master_up", "lock_held": null, "master_group": null, "master_id": -1, "name": "server1", "node_id": 3000, "parameters": { "address": "127.0.0.1", "disk_space_threshold": null, "extra_port": 0, "max_routing_connections": 0, "monitorpw": null, "monitoruser": null, "persistmaxtime": "0ms", "persistpoolmax": 0, "port": 3000, "priority": 0, "proxy_protocol": false, "rank": "primary", "socket": null, "ssl": false, "ssl_ca_cert": null, "ssl_cert": null, "ssl_cert_verify_depth": 9, "ssl_cipher": null, "ssl_key": null, "ssl_verify_peer_certificate": false, "ssl_verify_peer_host": false, "ssl_version": "MAX" }, "read_only": false, "replication_lag": 0, "server_id": 3000, "slave_connections": [], "source": { "file": "/etc/maxscale.cnf", "type": "static" }, "state": "Master, Running", "state_details": null, "statistics": { "active_operations": 0, "adaptive_avg_select_time": "0ns", "connection_pool_empty": 0, "connections": 1, "failed_auths": 0, "max_connections": 1, "max_pool_size": 0, "persistent_connections": 0, "response_time_distribution": { "read": { "distribution": [ { "count": 0, "time": "0.000001", "total": 0.0 }, { "count": 0, "time": "0.000010", "total": 0.0 }, { "count": 0, "time": "0.000100", "total": 0.0 }, { "count": 1, "time": "0.001000", "total": 0.00022808 }, { "count": 0, "time": "0.010000", "total": 0.0 }, { "count": 0, "time": "0.100000", "total": 0.0 }, { "count": 0, "time": "1.000000", "total": 0.0 }, { "count": 0, "time": "10.000000", "total": 0.0 }, { "count": 0, "time": "100.000000", "total": 0.0 }, { "count": 0, "time": "1000.000000", "total": 0.0 }, { "count": 0, "time": "10000.000000", "total": 0.0 }, { "count": 0, "time": "100000.000000", "total": 0.0 } ], "operation": "read", "range_base": 10 }, "write": { "distribution": [ { "count": 0, "time": "0.000001", "total": 0.0 }, { "count": 0, "time": "0.000010", "total": 0.0 }, { "count": 0, "time": "0.000100", "total": 0.0 }, { "count": 1, "time": "0.001000", "total": 0.00053516399999999997 }, { "count": 0, "time": "0.010000", "total": 0.0 }, { "count": 0, "time": "0.100000", "total": 0.0 }, { "count": 0, "time": "1.000000", "total": 0.0 }, { "count": 0, "time": "10.000000", "total": 0.0 }, { "count": 0, "time": "100.000000", "total": 0.0 }, { "count": 0, "time": "1000.000000", "total": 0.0 }, { "count": 0, "time": "10000.000000", "total": 0.0 }, { "count": 0, "time": "100000.000000", "total": 0.0 } ], "operation": "write", "range_base": 10 } }, "reused_connections": 0, "routed_packets": 2, "total_connections": 1 }, "triggered_at": "Thu, 20 Jul 2023 15:20:06 GMT", "version_string": "10.5.19-MariaDB-1:10.5.19+maria~ubu2004-log" }, "id": "server1", "links": { "self": "http://localhost:8989/v1/servers/server1/" }, "relationships": { "monitors": { "data": [ { "id": "MariaDB-Monitor", "type": "monitors" } ], "links": { "related": "http://localhost:8989/v1/monitors/", "self": "http://localhost:8989/v1/servers/server1/relationships/monitors/" } }, "services": { "data": [ { "id": "RW-Split-Router", "type": "services" }, { "id": "Read-Connection-Router", "type": "services" } ], "links": { "related": "http://localhost:8989/v1/services/", "self": "http://localhost:8989/v1/servers/server1/relationships/services/" } } }, "type": "servers" }, { "attributes": { "gtid_binlog_pos": "0-3000-5", "gtid_current_pos": "0-3000-5", "last_event": "slave_up", "lock_held": null, "master_group": null, "master_id": 3000, "name": "server2", "node_id": 3001, "parameters": { "address": "127.0.0.1", "disk_space_threshold": null, "extra_port": 0, "max_routing_connections": 0, "monitorpw": null, "monitoruser": null, "persistmaxtime": "0ms", "persistpoolmax": 0, "port": 3001, "priority": 0, "proxy_protocol": false, "rank": "primary", "socket": null, "ssl": false, "ssl_ca_cert": null, "ssl_cert": null, "ssl_cert_verify_depth": 9, "ssl_cipher": null, "ssl_key": null, "ssl_verify_peer_certificate": false, "ssl_verify_peer_host": false, "ssl_version": "MAX" }, "read_only": false, "replication_lag": 0, "server_id": 3001, "slave_connections": [ { "connection_name": "", "gtid_io_pos": "", "last_io_error": "", "last_sql_error": "", "master_host": "127.0.0.1", "master_port": 3000, "master_server_id": 3000, "seconds_behind_master": 0, "slave_io_running": "Yes", "slave_sql_running": "Yes" } ], "source": { "file": "/etc/maxscale.cnf", "type": "static" }, "state": "Slave, Running", "state_details": null, "statistics": { "active_operations": 0, "adaptive_avg_select_time": "0ns", "connection_pool_empty": 0, "connections": 1, "failed_auths": 0, "max_connections": 1, "max_pool_size": 0, "persistent_connections": 0, "response_time_distribution": { "read": { "distribution": [ { "count": 0, "time": "0.000001", "total": 0.0 }, { "count": 0, "time": "0.000010", "total": 0.0 }, { "count": 0, "time": "0.000100", "total": 0.0 }, { "count": 1, "time": "0.001000", "total": 0.00065983999999999997 }, { "count": 0, "time": "0.010000", "total": 0.0 }, { "count": 0, "time": "0.100000", "total": 0.0 }, { "count": 0, "time": "1.000000", "total": 0.0 }, { "count": 0, "time": "10.000000", "total": 0.0 }, { "count": 0, "time": "100.000000", "total": 0.0 }, { "count": 0, "time": "1000.000000", "total": 0.0 }, { "count": 0, "time": "10000.000000", "total": 0.0 }, { "count": 0, "time": "100000.000000", "total": 0.0 } ], "operation": "read", "range_base": 10 }, "write": { "distribution": [ { "count": 0, "time": "0.000001", "total": 0.0 }, { "count": 0, "time": "0.000010", "total": 0.0 }, { "count": 0, "time": "0.000100", "total": 0.0 }, { "count": 0, "time": "0.001000", "total": 0.0 }, { "count": 0, "time": "0.010000", "total": 0.0 }, { "count": 0, "time": "0.100000", "total": 0.0 }, { "count": 0, "time": "1.000000", "total": 0.0 }, { "count": 0, "time": "10.000000", "total": 0.0 }, { "count": 0, "time": "100.000000", "total": 0.0 }, { "count": 0, "time": "1000.000000", "total": 0.0 }, { "count": 0, "time": "10000.000000", "total": 0.0 }, { "count": 0, "time": "100000.000000", "total": 0.0 } ], "operation": "write", "range_base": 10 } }, "reused_connections": 0, "routed_packets": 1, "total_connections": 1 }, "triggered_at": "Thu, 20 Jul 2023 15:20:06 GMT", "version_string": "10.5.19-MariaDB-1:10.5.19+maria~ubu2004-log" }, "id": "server2", "links": { "self": "http://localhost:8989/v1/servers/server2/" }, "relationships": { "monitors": { "data": [ { "id": "MariaDB-Monitor", "type": "monitors" } ], "links": { "related": "http://localhost:8989/v1/monitors/", "self": "http://localhost:8989/v1/servers/server2/relationships/monitors/" } }, "services": { "data": [ { "id": "RW-Split-Router", "type": "services" }, { "id": "Read-Connection-Router", "type": "services" } ], "links": { "related": "http://localhost:8989/v1/services/", "self": "http://localhost:8989/v1/servers/server2/relationships/services/" } } }, "type": "servers" } ], "links": { "self": "http://localhost:8989/v1/servers/" } }
Create a server
POST /v1/servers
Create a new server by defining the resource. The posted object must define at least the following fields.
data.id-
Name of the server
-
data.type -
Type of the object, must be
servers -
data.attributes.parameters.addressORdata.attributes.parameters.socket -
The
addressorsocketto use. Only one of the fields can be defined. -
data.attributes.parameters.port - The
portto use. Needs to be defined if theaddressfield is defined.
The following is the minimal required JSON object for defining a new server.
{ "data": { "id": "server3", "type": "servers", "attributes": { "parameters": { "address": "127.0.0.1", "port": 3003 } } } }
The relationships of a server can also be defined at creation time. This allows new servers to be created and immediately taken into use.
{ "data": { "id": "server4", "type": "servers", "attributes": { "parameters": { "address": "127.0.0.1", "port": 3002 } }, "relationships": { "services": { "data": [ { "id": "RW-Split-Router", "type": "services" }, { "id": "Read-Connection-Router", "type": "services" } ] }, "monitors": { "data": [ { "id": "MySQL-Monitor", "type": "monitors" } ] } } } }
Refer to the Configuration Guide for a full list of server parameters.
Response
Server created:
Status: 204 No Content
Invalid JSON body:
Status: 403 Forbidden
Update a server
PATCH /v1/servers/:name
The request body must be a valid JSON document representing the modified server.
Modifiable Fields
In addition to the server parameters, the services and monitors fields of the relationships object can be modified. Removal, addition and modification of the links will change which service and monitors use this server.
For example, removing the first value in the services list in the relationships object from the following JSON document will remove the server1 from the service RW-Split-Router.
Removing a service from a server is analogous to removing the server from the service. Both unlink the two objects from each other.
Request for PATCH /v1/servers/server1 that modifies the address of the server:
{ "data": { "attributes": { "parameters": { "address": "192.168.0.123" } } } }
Request for PATCH /v1/servers/server1 that modifies the server relationships:
{ "data": { "relationships": { "services": { "data": [ { "id": "Read-Connection-Router", "type": "services" } ] }, "monitors": { "data": [ { "id": "MySQL-Monitor", "type": "monitors" } ] } } } }
If parts of the resource are not defined (e.g. the attributes field in the
above example), those parts of the resource are not modified. All parts that are
defined are interpreted as the new definition of those part of the resource. In
the above example, the relationships of the resource are completely redefined.
Response
Server modified:
Status: 204 No Content
Invalid JSON body:
Status: 403 Forbidden
Update server relationships
PATCH /v1/servers/:name/relationships/:type
The :type in the URI must be either services, for service relationships, or monitors, for monitor relationships.
The request body must be a JSON object that defines only the data field. The value of the data field must be an array of relationship objects that define the id and type fields of the relationship. This object will replace the existing relationships of the particular type from the server.
The following is an example request and request body that defines a single service relationship for a server.
PATCH /v1/servers/my-db-server/relationships/services
{
data: [
{ "id": "my-rwsplit-service", "type": "services" }
]
}
All relationships for a server can be deleted by sending an empty array as the data field value. The following example removes the server from all services.
PATCH /v1/servers/my-db-server/relationships/services
{
data: []
}
Response
Server relationships modified:
Status: 204 No Content
Invalid JSON body:
Status: 403 Forbidden
Destroy a server
DELETE /v1/servers/:name
A server can only be deleted if it is not used by any services or monitors.
This endpoint also supports the force=yes parameter that will unconditionally
delete the server by first unlinking it from all services and monitors that use
it.
Response
Server is destroyed:
Status: 204 No Content
Server is in use:
Status: 403 Forbidden
Set server state
PUT /v1/servers/:name/set
This endpoint requires that the state parameter is passed with the
request. The value of state must be one of the following values.
| Value | State Description |
|---|---|
| master | Server is a Master |
| slave | Server is a Slave |
| maintenance | Server is put into maintenance |
| running | Server is up and running |
| synced | Server is a Galera node |
| drain | Server is drained of connections |
For example, to set the server db-server-1 into maintenance mode, a request to the following URL must be made:
PUT /v1/servers/db-server-1/set?state=maintenance
This endpoint also supports the force=yes parameter that will cause all
connections to the server to be closed if state=maintenance is also set. By
default setting a server into maintenance mode will cause connections to be
closed only after the next request is sent.
The following example forcefully closes all connections to server db-server-1 and sets it into maintenance mode:
PUT /v1/servers/db-server-1/set?state=maintenance&force=yes
Response
Server state modified:
Status: 204 No Content
Missing or invalid parameter:
Status: 403 Forbidden
Clear server state
PUT /v1/servers/:name/clear
This endpoint requires that the state parameter is passed with the
request. The value of state must be one of the values defined in the
set endpoint documentation.
Response
Server state modified:
Status: 204 No Content
Missing or invalid parameter:
Status: 403 Forbidden
