607 lines
17 KiB
Markdown
607 lines
17 KiB
Markdown
# Server Resource
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A server resource represents a backend database server.
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## Resource Operations
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### Get a server
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```
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GET /v1/servers/:name
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```
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Get a single server. The _:name_ in the URI must be a valid server name with all
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whitespace replaced with hyphens. The server names are case-insensitive.
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**Note**: The _parameters_ field contains all custom parameters for
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servers, including the server weighting parameters.
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#### Response
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`Status: 200 OK`
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```javascript
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{
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"links": {
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"self": "http://localhost:8989/v1/servers/server1"
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},
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"data": {
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"id": "server1", // Resource identifier
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"type": "servers", // Resource type
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"relationships": { // Resource relationships to other resources
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"services": { // Services that use this server
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"links": {
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"self": "http://localhost:8989/v1/services/"
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},
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"data": [ // References to service resources
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{
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"id": "RW-Split-Router",
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"type": "services"
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},
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{
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"id": "Read-Connection-Router",
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"type": "services"
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}
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]
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},
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"monitors": { // The monitor that is monitoring this server
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"links": {
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"self": "http://localhost:8989/v1/monitors/"
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},
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"data": [
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{
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"id": "MySQL-Monitor",
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"type": "monitors"
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}
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]
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}
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},
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"attributes": { // Resource attributes
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"parameters": { // Server parameters
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"address": "127.0.0.1",
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"port": 3000,
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"protocol": "MariaDBBackend",
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"authenticator": "MySQLBackendAuth",
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"ssl_key": "/etc/certs/client-key.pem",
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"ssl_cert": "/etc/certs/client-cert.pem",
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"ssl_ca_cert": "/etc/certs/ca.pem",
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"ssl_cert_verify_depth": 9,
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"ssl_version": "MAX"
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},
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"state": "Master, Running", // Server state string
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"version_string": "10.1.22-MariaDB", // Server version
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"node_id": 3000, // Server node ID i.e. value of @@server_id
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"master_id": -1,
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"replication_depth": 0,
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"slaves": [ // List of slave server IDs
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3001
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],
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"statistics": { // Server statistics
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"connections": 0,
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"total_connections": 0,
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"active_operations": 0
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}
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},
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"links": { // Link to the server itself
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"self": "http://localhost:8989/v1/servers/server1"
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}
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}
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}
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```
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### Get all servers
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```
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GET /v1/servers
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```
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#### Response
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Response contains a resource collection with all servers.
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`Status: 200 OK`
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```javascript
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{
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"links": {
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"self": "http://localhost:8989/v1/servers/"
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},
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"data": [ // List of server resouces
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{
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"id": "server1",
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"type": "servers",
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"relationships": {
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"services": {
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"links": {
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"self": "http://localhost:8989/v1/services/"
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},
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"data": [
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{
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"id": "RW-Split-Router",
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"type": "services"
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},
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{
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"id": "Read-Connection-Router",
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"type": "services"
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}
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]
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},
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"monitors": {
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"links": {
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"self": "http://localhost:8989/v1/monitors/"
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},
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"data": [
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{
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"id": "MySQL-Monitor",
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"type": "monitors"
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}
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]
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}
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},
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"attributes": {
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"parameters": {
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"address": "127.0.0.1",
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"port": 3000,
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"protocol": "MariaDBBackend",
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"authenticator": "MySQLBackendAuth",
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"ssl_key": "/etc/certs/client-key.pem",
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"ssl_cert": "/etc/certs/client-cert.pem",
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"ssl_ca_cert": "/etc/certs/ca.pem",
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"ssl_cert_verify_depth": 9,
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"ssl_version": "MAX"
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},
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"state": "Master, Running",
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"version_string": "10.1.22-MariaDB",
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"node_id": 3000,
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"master_id": -1,
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"replication_depth": 0,
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"slaves": [
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3001
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],
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"statistics": {
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"connections": 0,
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"total_connections": 0,
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"active_operations": 0
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}
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},
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"links": {
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"self": "http://localhost:8989/v1/servers/server1"
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}
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},
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{
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"id": "server2",
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"type": "servers",
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"relationships": {
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"services": {
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"links": {
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"self": "http://localhost:8989/v1/services/"
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},
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"data": [
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{
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"id": "RW-Split-Router",
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"type": "services"
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}
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]
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},
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"monitors": {
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"links": {
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"self": "http://localhost:8989/v1/monitors/"
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},
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"data": [
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{
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"id": "MySQL-Monitor",
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"type": "monitors"
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}
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]
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}
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},
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"attributes": {
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"parameters": {
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"address": "127.0.0.1",
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"port": 3001,
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"protocol": "MariaDBBackend",
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"ssl_key": "/etc/certs/client-key.pem",
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"ssl_cert": "/etc/certs/client-cert.pem",
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"ssl_ca_cert": "/etc/certs/ca.pem",
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"ssl_cert_verify_depth": 9,
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"ssl_version": "MAX"
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},
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"state": "Slave, Running",
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"version_string": "10.1.22-MariaDB",
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"node_id": 3001,
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"master_id": 3000,
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"replication_depth": 1,
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"slaves": [],
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"statistics": {
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"connections": 0,
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"total_connections": 0,
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"active_operations": 0
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}
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},
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"links": {
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"self": "http://localhost:8989/v1/servers/server2"
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}
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}
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]
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}
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```
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### Create a server
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```
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POST /v1/servers
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```
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Create a new server by defining the resource. The posted object must define at
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least the following fields.
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* `data.id`
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* Name of the server
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* `data.type`
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* Type of the object, must be `servers`
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* `data.attributes.parameters.address`
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* The [`address`](../Getting-Started/Configuration-Guide.md#address) to use
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* `data.attributes.parameters.port`
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* The [`port`](../Getting-Started/Configuration-Guide.md#port) to use
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The following is the minimal required JSON object for defining a new server.
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```javascript
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{
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"data": {
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"id": "server3",
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"type": "servers",
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"attributes": {
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"parameters": {
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"address": "127.0.0.1",
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"port": 3003
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}
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}
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}
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}
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```
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The relationships of a server can also be defined at creation time. This allows
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new servers to be created and immediately taken into use.
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```javascript
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{
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"data": {
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"id": "server4",
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"type": "servers",
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"attributes": {
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"parameters": {
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"address": "127.0.0.1",
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"port": 3002
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}
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},
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"relationships": {
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"services": {
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"data": [
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{
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"id": "RW-Split-Router",
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"type": "services"
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},
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{
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"id": "Read-Connection-Router",
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"type": "services"
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}
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]
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},
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"monitors": {
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"data": [
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{
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"id": "MySQL-Monitor",
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"type": "monitors"
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}
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]
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}
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}
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}
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}
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```
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The following parameters can be defined when a server is being created.
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- [address](../Getting-Started/Configuration-Guide.md#address)
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- [port](../Getting-Started/Configuration-Guide.md#port)
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- [protocol](../Getting-Started/Configuration-Guide.md#protocol)
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- [authenticator](../Getting-Started/Configuration-Guide.md#authenticator)
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- [ssl_key](../Getting-Started/Configuration-Guide.md#ssl_key)
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- [ssl_cert](../Getting-Started/Configuration-Guide.md#ssl_cert)
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- [ssl_ca_cert](../Getting-Started/Configuration-Guide.md#ssl_ca_cert)
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- [ssl_version](../Getting-Started/Configuration-Guide.md#ssl_version)
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- [ssl_cert_verify_depth](../Getting-Started/Configuration-Guide.md#ssl_cert_verify_depth)
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- [ssl_verify_peer_certificate](../Getting-Started/Configuration-Guide.md#ssl_verify_peer_certificate)
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#### Response
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Server created:
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`Status: 204 No Content`
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Invalid JSON body:
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`Status: 403 Forbidden`
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### Update a server
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```
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PATCH /v1/servers/:name
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```
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The _:name_ in the URI must map to a server name with all whitespace replaced
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with hyphens and the request body must be a valid JSON document representing the
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modified server. If the server in question is not found, a 404 Not Found
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response is returned.
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### Modifiable Fields
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The following standard server parameters can be modified.
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- [address](../Getting-Started/Configuration-Guide.md#address)
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- [port](../Getting-Started/Configuration-Guide.md#port)
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- [monitoruser](../Getting-Started/Configuration-Guide.md#monitoruser)
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- [monitorpw](../Getting-Started/Configuration-Guide.md#monitorpw)
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Refer to the documentation on these parameters for valid values.
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The server weighting parameters can also be added, removed and updated. To
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remove a parameter, define the value of that parameter as the _null_ JSON type
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e.g. `{ "my-param": null }`. To add a parameter, add a new key-value pair to
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the _parameters_ object with a name that does not conflict with the standard
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parameters. To modify a weighting parameter, simply change the value.
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In addition to standard parameters, the _services_ and _monitors_ fields of the
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_relationships_ object can be modified. Removal, addition and modification of
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the links will change which service and monitors use this server.
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For example, removing the first value in the _services_ list in the
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_relationships_ object from the following JSON document will remove the
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_server1_ from the service _RW-Split-Router_.
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Removing a service from a server is analogous to removing the server from the
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service. Both unlink the two objects from each other.
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Response to `GET /v1/server/server1`:
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```javascript
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{
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"links": {
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"self": "http://localhost:8989/v1/servers/server1"
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},
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"data": {
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"id": "server1",
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"type": "servers",
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"relationships": {
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"services": {
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"links": {
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"self": "http://localhost:8989/v1/services/"
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},
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"data": [
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{
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"id": "RW-Split-Router", // We'll remove this service
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"type": "services"
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},
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{
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"id": "Read-Connection-Router",
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"type": "services"
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}
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]
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},
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"monitors": {
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"links": {
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"self": "http://localhost:8989/v1/monitors/"
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},
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"data": [
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{
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"id": "MySQL-Monitor",
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"type": "monitors"
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}
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]
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}
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},
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"attributes": {
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"parameters": {
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"address": "127.0.0.1",
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"port": 3000,
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"protocol": "MariaDBBackend"
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},
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"state": "Master, Running",
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"version_string": "10.1.22-MariaDB",
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"node_id": 3000,
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"master_id": -1,
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"replication_depth": 0,
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"slaves": [
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3001,
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3002
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],
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"statistics": {
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"connections": 0,
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"total_connections": 0,
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"active_operations": 0
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}
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},
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"links": {
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"self": "http://localhost:8989/v1/servers/server1"
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}
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}
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}
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```
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Request for `PUT /v1/server/server1`:
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```javascript
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{
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"data": {
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"id": "server1",
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"type": "servers",
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"relationships": {
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"services": {
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"data": [
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{
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"id": "Read-Connection-Router",
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"type": "services"
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}
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]
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},
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"monitors": {
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"data": [
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{
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"id": "MySQL-Monitor",
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"type": "monitors"
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}
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]
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}
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}
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}
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}
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```
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If parts of the resource are not defined (e.g. the `attributes` field in the
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above example), those parts of the resource are not modified. All parts that are
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defined are interpreted as the new definition of those part of the resource. In
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the above example, the `relationships` of the resource are completely redefined.
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#### Response
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Server modified:
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`Status: 204 No Content`
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Invalid JSON body:
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`Status: 403 Forbidden`
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### Update server relationships
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```
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PATCH /v1/servers/:name/relationships/:type
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```
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The _:name_ in the URI must map to a server name with all whitespace replaced
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with hyphens. The _:type_ in the URI must be either _services_, for service
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relationships, or _monitors_, for monitor relationships.
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The request body must be a JSON object that defines only the _data_ field. The
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value of the _data_ field must be an array of relationship objects that define
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the _id_ and _type_ fields of the relationship. This object will replace the
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existing relationships of the particular type from the server.
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The following is an example request and request body that defines a single
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service relationship for a server.
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```
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PATCH /v1/servers/my-db-server/relationships/services
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{
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data: [
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{ "id": "my-rwsplit-service", "type": "services" }
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]
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}
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```
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All relationships for a server can be deleted by sending an empty array as the
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_data_ field value. The following example removes the server from all services.
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```
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PATCH /v1/servers/my-db-server/relationships/services
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{
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data: []
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}
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```
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#### Response
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Server relationships modified:
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`Status: 204 No Content`
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Invalid JSON body:
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`Status: 403 Forbidden`
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### Destroy a server
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```
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DELETE /v1/servers/:name
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```
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The _:name_ in the URI must map to a server name with all whitespace replaced
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with hyphens.
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A server can only be deleted if it is not used by any services or monitors.
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#### Response
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Server is destroyed:
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`Status: 204 No Content`
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Server is in use:
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`Status: 403 Forbidden`
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### Set server state
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```
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PUT /v1/servers/:name/set
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```
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The _:name_ in the URI must map to a server name with all whitespace replaced
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with hyphens. This endpoint requires that the `state` parameter is passed with
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the request. The value of `state` must be one of the following values.
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|Value | State Description |
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|-----------|--------------------------------|
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|master | Server is a Master |
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|slave | Server is a Slave |
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|maintenance| Server is put into maintenance |
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|running | Server is up and running |
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|synced | Server is a Galera node |
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|ndb | Server is a NDBCluster node |
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|stale | Server is a stale Master |
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For example, to set the server _db-server-1_ into maintenance mode, a request to
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the following URL must be made:
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```
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PUT /v1/servers/db-server-1/set?state=maintenance
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```
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#### Response
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Server state modified:
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`Status: 204 No Content`
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Missing or invalid parameter:
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`Status: 403 Forbidden`
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### Clear server state
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```
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PUT /v1/servers/:name/clear
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```
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The _:name_ in the URI must map to a server name with all whitespace replaced
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with hyphens. This endpoint requires that the `state` parameter is passed with
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the request. The value of `state` must be one of the values defined in the
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_set_ endpoint documentation.
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#### Response
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Server state modified:
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`Status: 204 No Content`
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Missing or invalid parameter:
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`Status: 403 Forbidden`
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