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feat(besu): add prometheus exporter
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	Primary Change
	--------------

	1. The besu ledger connector plugin now includes the prometheus metrics exporter integration
	2. OpenAPI spec now has api endpoint for the getting the prometheus metrics

	Refactorings that were also necessary to accomodate 1) and 2)
	------------------------------------------------------------

	3. GetPrometheusMetricsV1 class is created to handle the corresponding api endpoint
	4. IPluginLedgerConnectorBesuOptions interface in PluginLedgerConnectorBesu class now has a prometheusExporter optional field
	5. The PluginLedgerConnectorBesu class has relevant functions and codes to incorporate prometheus exporter
	6. Added Readme.md on the prometheus exporter usage

	Fixes hyperledger-cacti#533

Signed-off-by: Jagpreet Singh Sasan <jagpreet.singh.sasan@accenture.com>
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jagpreetsinghsasan committed Mar 24, 2021
1 parent fea547f commit 35d4c72
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44 changes: 41 additions & 3 deletions packages/cactus-plugin-ledger-connector-besu/README.md
Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@ This plugin provides `Cactus` a way to interact with Besu networks. Using this w

- [Getting Started](#getting-started)
- [Usage](#usage)
- [Prometheus Exporter](#prometheus-exporter)
- [Runing the tests](#running-the-tests)
- [Built With](#built-with)
- [Contributing](#contributing)
Expand All @@ -33,8 +34,6 @@ In the project root folder, run this command to compile the plugin and create th
npm run tsc
```

## Usage

To use this import public-api and create new **PluginFactoryLedgerConnector**. Then use it to create a connector.
```typescript
const factory = new PluginFactoryLedgerConnector({
Expand Down Expand Up @@ -80,6 +79,45 @@ enum Web3SigningCredentialType {
```
> Extensive documentation and examples in the [readthedocs](https://readthedocs.org/projects/hyperledger-cactus/) (WIP)
## Prometheus Exporter

This class creates a prometheus exporter, which scrapes the transactions (total transaction count) for the use cases incorporating the use of Besu connector plugin.

### Usage
The prometheus exporter object is initialized in the `PluginLedgerConnectorBesu` class constructor itself, so instantiating the object of the `PluginLedgerConnectorBesu` class, gives access to the exporter object.
You can also initialize the prometheus exporter object seperately and then pass it to the `IPluginLedgerConnectorBesuOptions` interface for `PluginLedgerConnectoBesu` constructor.

`getPrometheusExporterMetricsV1` function returns the prometheus exporter metrics, currently displaying the total transaction count, which currently increments everytime the `transact()` method of the `PluginLedgerConnectorBesu` class is called.

### Prometheus Integration
To use Prometheus with this exporter make sure to install [Prometheus main component](https://prometheus.io/download/).
Once Prometheus is setup, the corresponding scrape_config needs to be added to the prometheus.yml

```(yaml)
- job_name: 'besu_ledger_connector_exporter'
metrics_path: api/v1/plugins/@hyperledger/cactus-plugin-ledger-connector-besu/get-prometheus-exporter-metrics
scrape_interval: 5s
static_configs:
- targets: ['{host}:{port}']
```

Here the `host:port` is where the prometheus exporter metrics are exposed. The test cases (For example, packages/cactus-plugin-ledger-connector-besu/src/test/typescript/integration/plugin-ledger-connector-besu/deploy-contract/deploy-contract-from-json.test.ts) exposes it over `0.0.0.0` and a random port(). The random port can be found in the running logs of the test case and looks like (42379 in the below mentioned URL)
`Metrics URL: http://0.0.0.0:42379/api/v1/plugins/@hyperledger/cactus-plugin-ledger-connector-besu/get-prometheus-exporter-metrics`

Once edited, you can start the prometheus service by referencing the above edited prometheus.yml file.
On the prometheus graphical interface (defaulted to http://localhost:9090), choose **Graph** from the menu bar, then select the **Console** tab. From the **Insert metric at cursor** drop down, select **cactus_besu_total_tx_count** and click **execute**

### Helper code

###### response.type.ts
This file contains the various responses of the metrics.

###### data-fetcher.ts
This file contains functions encasing the logic to process the data points

###### metrics.ts
This file lists all the prometheus metrics and what they are used for.

## Running the tests

To check that all has been installed correctly and that the pugin has no errors run the tests:
Expand All @@ -99,4 +137,4 @@ Please review [CONTIRBUTING.md](../../CONTRIBUTING.md) to get started.

This distribution is published under the Apache License Version 2.0 found in the [LICENSE](../../LICENSE) file.

## Acknowledgments
## Acknowledgments
21 changes: 21 additions & 0 deletions packages/cactus-plugin-ledger-connector-besu/package-lock.json

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6 changes: 5 additions & 1 deletion packages/cactus-plugin-ledger-connector-besu/package.json
Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,10 @@
"ignore": [
"src/**/generated/*"
],
"extensions": ["ts", "json"],
"extensions": [
"ts",
"json"
],
"quiet": true,
"verbose": false,
"runOnChangeOnly": true
Expand Down Expand Up @@ -87,6 +90,7 @@
"express": "4.17.1",
"joi": "14.3.1",
"openapi-types": "7.0.1",
"prom-client": "13.1.0",
"typescript-optional": "2.0.1",
"web3": "1.2.7",
"web3-eea": "0.10.0"
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -651,6 +651,10 @@
"nullable": false
}
}
},
"PrometheusExporterMetricsResponse": {
"type": "string",
"nullable": false
}
}
},
Expand Down Expand Up @@ -829,6 +833,31 @@
}
}
}
},
"/api/v1/plugins/@hyperledger/cactus-plugin-ledger-connector-besu/get-prometheus-exporter-metrics": {
"get": {
"x-hyperledger-cactus": {
"http": {
"verbLowerCase": "get",
"path": "/api/v1/plugins/@hyperledger/cactus-plugin-ledger-connector-besu/get-prometheus-exporter-metrics"
}
},
"operationId": "getPrometheusExporterMetricsV1",
"summary": "Get the Prometheus Metrics",
"parameters": [],
"responses": {
"200": {
"description": "OK",
"content": {
"text/plain": {
"schema": {
"$ref": "#/components/schemas/PrometheusExporterMetricsResponse"
}
}
}
}
}
}
}
}
}
Original file line number Diff line number Diff line change
Expand Up @@ -784,6 +784,42 @@ export const DefaultApiAxiosParamCreator = function (configuration?: Configurati
options: localVarRequestOptions,
};
},
/**
*
* @summary Get the Prometheus Metrics
* @param {*} [options] Override http request option.
* @throws {RequiredError}
*/
getPrometheusExporterMetricsV1: async (options: any = {}): Promise<RequestArgs> => {
const localVarPath = `/api/v1/plugins/@hyperledger/cactus-plugin-ledger-connector-besu/get-prometheus-exporter-metrics`;
// use dummy base URL string because the URL constructor only accepts absolute URLs.
const localVarUrlObj = new URL(localVarPath, 'https://example.com');
let baseOptions;
if (configuration) {
baseOptions = configuration.baseOptions;
}
const localVarRequestOptions = { method: 'GET', ...baseOptions, ...options};
const localVarHeaderParameter = {} as any;
const localVarQueryParameter = {} as any;



const query = new URLSearchParams(localVarUrlObj.search);
for (const key in localVarQueryParameter) {
query.set(key, localVarQueryParameter[key]);
}
for (const key in options.query) {
query.set(key, options.query[key]);
}
localVarUrlObj.search = (new URLSearchParams(query)).toString();
let headersFromBaseOptions = baseOptions && baseOptions.headers ? baseOptions.headers : {};
localVarRequestOptions.headers = {...localVarHeaderParameter, ...headersFromBaseOptions, ...options.headers};

return {
url: localVarUrlObj.pathname + localVarUrlObj.search + localVarUrlObj.hash,
options: localVarRequestOptions,
};
},
/**
* Obtain signatures of ledger from the corresponding transaction hash.
* @summary Obtain signatures of ledger from the corresponding transaction hash.
Expand Down Expand Up @@ -894,6 +930,19 @@ export const DefaultApiFp = function(configuration?: Configuration) {
return axios.request(axiosRequestArgs);
};
},
/**
*
* @summary Get the Prometheus Metrics
* @param {*} [options] Override http request option.
* @throws {RequiredError}
*/
async getPrometheusExporterMetricsV1(options?: any): Promise<(axios?: AxiosInstance, basePath?: string) => AxiosPromise<string>> {
const localVarAxiosArgs = await DefaultApiAxiosParamCreator(configuration).getPrometheusExporterMetricsV1(options);
return (axios: AxiosInstance = globalAxios, basePath: string = BASE_PATH) => {
const axiosRequestArgs = {...localVarAxiosArgs.options, url: basePath + localVarAxiosArgs.url};
return axios.request(axiosRequestArgs);
};
},
/**
* Obtain signatures of ledger from the corresponding transaction hash.
* @summary Obtain signatures of ledger from the corresponding transaction hash.
Expand Down Expand Up @@ -957,6 +1006,15 @@ export const DefaultApiFactory = function (configuration?: Configuration, basePa
apiV2BesuInvokeContract(invokeContractV2Request?: InvokeContractV2Request, options?: any): AxiosPromise<InvokeContractV2Response> {
return DefaultApiFp(configuration).apiV2BesuInvokeContract(invokeContractV2Request, options).then((request) => request(axios, basePath));
},
/**
*
* @summary Get the Prometheus Metrics
* @param {*} [options] Override http request option.
* @throws {RequiredError}
*/
getPrometheusExporterMetricsV1(options?: any): AxiosPromise<string> {
return DefaultApiFp(configuration).getPrometheusExporterMetricsV1(options).then((request) => request(axios, basePath));
},
/**
* Obtain signatures of ledger from the corresponding transaction hash.
* @summary Obtain signatures of ledger from the corresponding transaction hash.
Expand Down Expand Up @@ -1025,6 +1083,17 @@ export class DefaultApi extends BaseAPI {
return DefaultApiFp(this.configuration).apiV2BesuInvokeContract(invokeContractV2Request, options).then((request) => request(this.axios, this.basePath));
}

/**
*
* @summary Get the Prometheus Metrics
* @param {*} [options] Override http request option.
* @throws {RequiredError}
* @memberof DefaultApi
*/
public getPrometheusExporterMetricsV1(options?: any) {
return DefaultApiFp(this.configuration).getPrometheusExporterMetricsV1(options).then((request) => request(this.axios, this.basePath));
}

/**
* Obtain signatures of ledger from the corresponding transaction hash.
* @summary Obtain signatures of ledger from the corresponding transaction hash.
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -59,13 +59,19 @@ import { InvokeContractEndpoint } from "./web-services/invoke-contract-endpoint"
import { InvokeContractEndpointV2 } from "./web-services/invoke-contract-endpoint-v2";
import { isWeb3SigningCredentialNone } from "./model-type-guards";
import { BesuSignTransactionEndpointV1 } from "./web-services/sign-transaction-endpoint-v1";
import { PrometheusExporter } from "./prometheus-exporter/prometheus-exporter";
import {
GetPrometheusExporterMetricsEndpointV1,
IGetPrometheusExporterMetricsEndpointV1Options,
} from "./web-services/get-prometheus-exporter-metrics-endpoint-v1";

export const E_KEYCHAIN_NOT_FOUND = "cactus.connector.besu.keychain_not_found";

export interface IPluginLedgerConnectorBesuOptions
extends ICactusPluginOptions {
rpcApiHttpHost: string;
pluginRegistry: PluginRegistry;
prometheusExporter?: PrometheusExporter;
logLevel?: LogLevelDesc;
contractsPath?: string;
}
Expand All @@ -81,6 +87,7 @@ export class PluginLedgerConnectorBesu
ICactusPlugin,
IPluginWebService {
private readonly instanceId: string;
public prometheusExporter: PrometheusExporter;
private readonly log: Logger;
private readonly web3: Web3;
private readonly pluginRegistry: PluginRegistry;
Expand Down Expand Up @@ -114,6 +121,25 @@ export class PluginLedgerConnectorBesu
this.instanceId = options.instanceId;
this.pluginRegistry = options.pluginRegistry;
this.contractsPath = options.contractsPath;
this.prometheusExporter =
options.prometheusExporter ||
new PrometheusExporter({ pollingIntervalInMin: 1 });
Checks.truthy(
this.prometheusExporter,
`${fnTag} options.prometheusExporter`,
);

this.prometheusExporter.startMetricsCollection();
}

public getPrometheusExporter(): PrometheusExporter {
return this.prometheusExporter;
}

public async getPrometheusExporterMetrics(): Promise<string> {
const res: string = await this.prometheusExporter.getPrometheusMetrics();
this.log.debug(`getPrometheusExporterMetrics() response: %o`, res);
return res;
}

public getInstanceId(): string {
Expand Down Expand Up @@ -176,6 +202,15 @@ export class PluginLedgerConnectorBesu
endpoint.registerExpress(expressApp);
endpoints.push(endpoint);
}
{
const opts: IGetPrometheusExporterMetricsEndpointV1Options = {
connector: this,
logLevel: this.options.logLevel,
};
const endpoint = new GetPrometheusExporterMetricsEndpointV1(opts);
endpoint.registerExpress(expressApp);
endpoints.push(endpoint);
}
return endpoints;
}

Expand Down Expand Up @@ -365,6 +400,7 @@ export class PluginLedgerConnectorBesu
this.log.debug(`${fnTag} Web3 sendSignedTransaction failed`, receipt);
throw receipt;
} else {
this.prometheusExporter.addCurrentTransaction();
return { transactionReceipt: receipt };
}
}
Expand Down
Original file line number Diff line number Diff line change
@@ -0,0 +1,8 @@
import { Transactions } from "./response.type";

import { totalTxCount, K_CACTUS_BESU_TOTAL_TX_COUNT } from "./metrics";

export async function collectMetrics(transactions: Transactions) {
transactions.counter++;
totalTxCount.labels(K_CACTUS_BESU_TOTAL_TX_COUNT).set(transactions.counter);
}
Original file line number Diff line number Diff line change
@@ -0,0 +1,9 @@
import { Gauge } from "prom-client";

export const K_CACTUS_BESU_TOTAL_TX_COUNT = "cactus_besu_total_tx_count";

export const totalTxCount = new Gauge({
name: "cactus_besu_total_tx_count",
help: "Total transactions executed",
labelNames: ["type"],
});
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