service-clusters-node v1.1.0

Clusters microservice

This is the clusters microservice. It keeps list of working clusters.

The microservice currently supports the following deployment options:

• Deployment platforms: Standalone Process
• External APIs: HTTP/REST
• Persistence: Memory, Flat Files, MongoDB

This microservice has no dependencies on other microservices. Quick Links:

• Download Links
• Development Guide
• Configuration Guide
• Client SDKs
  • Node.js SDK

Contract

Logical contract of the microservice is presented below. For physical implementation (HTTP/REST, Thrift, Seneca, Lambda, etc.), please, refer to documentation of the specific protocol.

class ClusterV1 implements IStringIdentifiable {
    public id: string;

    public name: string;
    public type: string;
    public active: boolean;

    public master_nodes?: string[];
    public slave_nodes?: string[];

    public api_host?: string;
    public service_ports?:  { [name: string]: number };
    
    public maintenance?: boolean;
    public version?: string;
    public update_time?: Date;

    public max_tenant_count ?: number;
    public tenants_count?: number;
    public open?: boolean;
    public active_tenants?: string[];
    public inactive_tenants?: string[];
}

interface IClustersController {
    getClusters(correlationId: string, filter: FilterParams, paging: PagingParams): Promise<DataPage<ClusterV1>>;

    getClusterById(correlationId: string, cluster_id: string): Promise<ClusterV1>;

    createCluster(correlationId: string, cluster: ClusterV1): Promise<ClusterV1>;

    updateCluster(correlationId: string, cluster: ClusterV1): Promise<ClusterV1>;
    
    deleteClusterById(correlationId: string, cluster_id: string): Promise<ClusterV1>;

    addTenant(correlationId: string, tenantId: string): Promise<ClusterV1>;

    removeTenant(correlationId: string, tenantId: string): Promise<ClusterV1>;            
}

Download

Right now the only way to get the microservice is to check it out directly from github repository

git clone git@github.com:pip-services-infrastructure2/service-clusters-node.git

Pip.Service team is working to implement packaging and make stable releases available for your as zip downloadable archieves.

Run

Add config.yaml file to the root of the microservice folder and set configuration parameters. As the starting point you can use example configuration from config.example.yaml file.

Example of microservice configuration

{    
---
- descriptor: "pip-services-commons:logger:console:default:1.0"
  level: "trace"

- descriptor: "service-clusters:persistence:file:default:1.0"
  path: "./data/blobs"

- descriptor: "service-clusters:controller:default:default:1.0"

- descriptor: "service-clusters:service:http:default:1.0"
  connection:
    protocol: "http"
    host: "0.0.0.0"
    port: 3000
}

For more information on the microservice configuration see Configuration Guide.

Start the microservice using the command:

node run

Use

The easiest way to work with the microservice is to use client SDK. The complete list of available client SDKs for different languages is listed in the Quick Links

If you use Node.js then you should add dependency to the client SDK into package.json file of your project

{
    ...
    "dependencies": {
        ....
        "client-clusters-node": "^1.0.*",
        ...
    }
}

Define client configuration parameters.

// Client configuration
var httpConfig = ConfigParams.fromTuples(
    "connection.protocol", "http",
    "connection.host", "localhost",
    "connection.port", 3000
);
client.configure(httpConfig);

Instantiate the client and open connection to the microservice

// Create the client instance
client = new ClustersHttpClientV1();

// Connect to the microservice
try {
    await client.open(null);
    // Work with the microservice
    ...
} catch(err) {
    console.error('Connection to the microservice failed');
    console.error(err);
}

Now the client is ready to perform operations:

Create new cluster:

let CLUSTER1: ClusterV1 = {
    id: '1',
    name: 'Cluster #1',
    type: 'root',
    active: true,
    api_host: 'api.mycluster1.com',
    service_ports: { myservice1: 30001, myservice2: 30002 },
    max_tenant_count: 1,
    tenants_count: 1,
    active_tenants: ['1']
};   

try {
    let cluster = await client.createCluster("123", CLUSTER1);
} catch(err) {
    console.error('Can\'t create cluster!');
    console.error(err);
}

Update exists cluster:

CLUSTER1.name = "Cluster #2";
try {
    let cluster = await client.updateCluster("123", CLUSTER1);
    console.dir('Cluster was updated successfull');
} catch(err) {
    console.error('Can\'t update cluster!');
    console.error(err);
}

Delete existing cluster by cluster_id

try {
    let cluster = await client.deleteClusterById("123", 1);
    console.dir('Cluster was delete successfull');
    console.dir('Deleted cluster:');
    console.dir(cluster.toString());
} catch(err) {
    console.error('Can\'t delete cluster!');
    console.error(err);
}

Add new tenant into active cluster

try {
    let cluster = await client.addTenant("123", "5");
    console.dir('Tenant was added successfull');
    console.dir('Cluster:');
    console.dir(cluster.toString());
} catch(err) {
    console.error('Can\'t add tenant to cluster!');
    console.error(err);
}

Remove existing tenant by tenantId

try {
    let cluster = await client.removeTenant("123", "5");
    console.dir('Tenant was deleted successfull');
    console.dir('Cluster:');
    console.dir(cluster.toString());
} catch(err) {
    console.error('Can\'t delete tenant from cluster!');
    console.error(err);
}

Get list of all clusters:

let filter = FilterParams.fromTuples(
    'active', true,
    'open', true
);

try {
    let clusters = await client.getClusters("123", filter, new PagingParams());
    console.dir("Cluster list length:");
    console.dir(clusters.data.length);
} catch(err) {
    console.error('Can\'t find cluster by filter!');
    console.error(err);
}

Get cluster by cluster_id:

try {
    let cluster = await client.getClusterById("123", "1");
    console.dir('Cluster was finded successfull');
    console.dir('Cluster:');
    console.dir(cluster.toString());
} catch(err) {
    console.error('Can\'t find cluster by cluster id!');
    console.error(err);
}

Get cluster by tenant:

try {
    let cluster = await client.getClusterByTenant("123", "5");
    console.dir('Cluster was finded successfull');
    console.dir('Cluster:');
    console.dir(cluster.toString());
} catch(err) {
    console.error('Can\'t find cluster by tenant id!');
    console.error(err);
}

Acknowledgements

This microservice was created and currently maintained by Sergey Seroukhov.