⚡ Init

.gitignore

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+# package directories
+node_modules
+yarn.lock
+
+# Serverless directories
+.serverless
+.webpack
+.env
+.docker

.npmignore

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+.travis.yml

.travis.yml

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+language: node_js
+node_js:
+- 4.3.2
+deploy:
+  provider: npm
+  email: [email protected]
+  api_key:
+    secure: "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"
+  on:
+    tags: true
+    repo: keboola/serverless-papertrail-logging
+    branch: master

LICENSE

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+The MIT License (MIT)
+Copyright (c) 2017 Keboola
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

package.json

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+{
+  "name": "serverless-papertrail-logging",
+  "version": "1.0.0",
+  "description": "Serverless Plugin for log delivery from CloudWatch Logs to Papertrail using a lambda function with log groups subscription",
+  "main": "src/index.js",
+  "repository": "https://github.com/keboola/serverless-papertrail-logging",
+  "author": "Jakub Matejka <[email protected]>",
+  "license": "MIT",
+  "publishConfig": {
+    "access": "public"
+  },
+  "dependencies": {
+    "lodash": "^4.17.4",
+    "winston": "^2.4.0",
+    "winston-papertrail": "^1.0.5",
+    "zlib": "^1.0.5"
+  },
+  "peerDependencies": {
+    "serverless": "^1.24.1"
+  }
+}

src/index.js

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+'use strict';
+
+const _ = require('lodash');
+const fs = require('fs');
+const path = require('path');
+
+class PapertrailLogging {
+  constructor(serverless) {
+    this.serverless = serverless;
+    this.service = serverless.service;
+
+    this.provider = this.serverless.getProvider('aws');
+
+    this.hooks = {
+      'before:deploy:createDeploymentArtifacts': this.beforeDeployCreateDeploymentArtifacts.bind(this),
+      'deploy:compileEvents': this.deployCompileEvents.bind(this),
+      'after:deploy:deploy': this.afterDeployDeploy.bind(this),
+    };
+  }
+
+  static getFunctionName() {
+    return 'papertrailLogger';
+  }
+
+  static getFunctionFilename() {
+    return 'papertrail-logger-function';
+  }
+
+  getEnvFilePath() {
+    return path.join(this.serverless.config.servicePath, LogSubscription.getFunctionFilename());
+  }
+
+  beforeDeployCreateDeploymentArtifacts() {
+    this.serverless.cli.log('Creating temporary logger function...');
+    let functionPath = this.getEnvFilePath();
+
+    if (!fs.existsSync(functionPath)) {
+      fs.mkdirSync(functionPath);
+    }
+
+    _.merge(
+      this.service.provider.compiledCloudFormationTemplate.Resources,
+      {
+        PapertrailLoggerLogGroup: {
+          Type: "AWS::Logs::LogGroup",
+          Properties: {
+            LogGroupName: `/aws/lambda/${this.service.service}-${this.service.provider.stage}-${LogSubscription.getFunctionName()}`
+          }
+        }
+      }
+    );
+
+    let templatePath = path.resolve(__dirname, './logger.handler.js');
+    let templateFile = fs.readFileSync(templatePath, 'utf-8');
+
+    let handlerFunction = templateFile
+      .replace('%papertrailPort%', this.service.custom.papertrail.port)
+      .replace('%papertrailHostname%', this.service.service)
+      .replace('%papertrailProgram%', this.service.provider.stage);
+    fs.writeFileSync(path.join(functionPath, 'handler.js'), handlerFunction);
+    this.service.functions[LogSubscription.getFunctionName()] = {
+      handler: `${LogSubscription.getFunctionFilename()}/handler.handler`,
+      name: `${this.service.service}-${this.service.provider.stage}-${LogSubscription.getFunctionName()}`,
+      tags: _.has(this.service.provider, 'stackTags') ? this.service.provider.stackTags : {},
+      events: []
+    };
+  }
+
+  deployCompileEvents() {
+    this.serverless.cli.log('Creating log subscriptions...');
+
+    const loggerLogicalId = this.provider.naming.getLambdaLogicalId(LogSubscription.getFunctionName());
+
+    _.each(this.service.provider.compiledCloudFormationTemplate.Resources, (item, key) => {
+      if (_.has(item, 'Type') && item.Type === 'AWS::Logs::LogGroup') {
+        this.service.provider.compiledCloudFormationTemplate.Resources[key].Properties.RetentionInDays = 30;
+      }
+    });
+
+    _.merge(
+      this.service.provider.compiledCloudFormationTemplate.Resources,
+      {
+        LambdaPermissionForSubscription: {
+          Type: 'AWS::Lambda::Permission',
+          Properties: {
+            FunctionName: { 'Fn::GetAtt': [loggerLogicalId, 'Arn'] },
+            Action: 'lambda:InvokeFunction',
+            Principal: { 'Fn::Sub': 'logs.${AWS::Region}.amazonaws.com' },
+            SourceArn: { 'Fn::Sub': 'arn:aws:logs:${AWS::Region}:${AWS::AccountId}:log-group:/aws/lambda/*' },
+          },
+          DependsOn: [loggerLogicalId]
+        }
+      }
+    );
+
+    const functions = this.service.getAllFunctions();
+    functions.forEach((functionName) => {
+      if (functionName !== LogSubscription.getFunctionName()) {
+        const functionData = this.service.getFunction(functionName);
+        const normalizedFunctionName = this.provider.naming.getNormalizedFunctionName(functionName);
+        _.merge(
+          this.service.provider.compiledCloudFormationTemplate.Resources,
+          {
+            [`${normalizedFunctionName}SubscriptionFilter`]: {
+              Type: 'AWS::Logs::SubscriptionFilter',
+              Properties: {
+                DestinationArn: { 'Fn::GetAtt': [loggerLogicalId, "Arn"] },
+                FilterPattern: '',
+                LogGroupName: `/aws/lambda/${functionData.name}`,
+              },
+              DependsOn: ['LambdaPermissionForSubscription']
+            }
+          }
+        );
+      }
+    });
+  }
+
+  afterDeployDeploy() {
+    this.serverless.cli.log('Removing temporary logger function');
+    let functionPath = this.getEnvFilePath();
+
+    try {
+      if (fs.existsSync(functionPath)) {
+        if (fs.existsSync(path.join(functionPath, 'handler.js'))) {
+          fs.unlinkSync(path.join(functionPath, 'handler.js'));
+        }
+        fs.rmdirSync(functionPath);
+      }
+    } catch (err) {
+      throw new Error(err);
+    }
+  }
+}
+
+module.exports = PapertrailLogging;

src/logger.handler.js

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+'use strict';
+
+const _ = require('lodash');
+const papertrail = require('winston-papertrail').Papertrail;
+const winston = require('winston');
+const zlib = require('zlib');
+
+exports.handler = function (event, context, callback) {
+  const logger = new (winston.Logger)({
+    transports: [],
+  });
+  logger.add(papertrail, {
+    host: 'logs.papertrailapp.com',
+    port: '%papertrailPort%',
+    hostname: '%papertrailHostname%',
+    program: '%papertrailProgram%',
+    flushOnClose: true,
+    includeMetaInMessage: false,
+    handleExceptions: true,
+    humanReadableUnhandledException: false,
+    logFormat: (level, message) => {
+      const consoleLog = message.split('\t');
+      if (consoleLog.length === 3) {
+        try {
+          const logData = JSON.parse(consoleLog[2]);
+          if (_.has(logData.event, 'body') && _.isString(logData.event.body)) {
+            logData.event.body = JSON.parse(logData.event.body);
+          }
+          return JSON.stringify(logData);
+        } catch (e) {
+          return JSON.stringify({ requestId: consoleLog[1], log: consoleLog[2] });
+        }
+      }
+
+      try {
+        const logData = JSON.parse(message);
+        if (!_.has(logData, 'statusCode')) {
+          logData.statusCode = 500;
+        }
+        return JSON.stringify(logData);
+      } catch (e) {
+        return message;
+      }
+    },
+  });
+
+  const payload = new Buffer(event.awslogs.data, 'base64');
+  zlib.gunzip(payload, (err, result) => {
+    if (err) {
+      return callback(err);
+    }
+
+    const logData = JSON.parse(result.toString('utf8'));
+    if (logData.messageType === 'CONTROL_MESSAGE') {
+      return callback();
+    }
+
+    logData.logEvents.forEach((line) => {
+      if (line.message && !_.startsWith(line.message, 'START RequestId') && !_.startsWith(line.message, 'END RequestId')
+        && !_.startsWith(line.message, 'REPORT RequestId')) {
+        logger.info(line.message);
+      }
+    });
+
+    logger.close();
+    return callback();
+  });
+};