DIGIT Core
PlatformDomainsAcademyDesign SystemFeedback
2.8
2.8
  • ☑️Introducing DIGIT Platform
    • DIGIT - Value Proposition
  • Platform
    • 🔎Overview
      • Principles
      • Architecture
        • Service Architecture
        • Infrastructure Architecture
        • Deployment Architecture
      • Technology
        • API Gateway
        • Open Source Tools
      • Checklists
        • API Checklist
        • Security Checklist
          • Security Guidelines Handbook
          • Security Flow - Exemplar
        • Performance Checklist
        • Deployment Checklist
      • UI Frameworks
        • React UI Framework
    • 🔧Core Services
      • Workflow Service
        • Setting Up Workflows
        • Configuring Workflows For An Entity
        • Workflow Auto Escalation
        • Migration To Workflow 2.0
      • Location Services
      • User Services
      • Access Control Services
      • PDF Generation Service
      • MDMS (Master Data Management Service)
        • Setting up Master Data
          • MDMS Overview
          • MDMS Rewritten
          • Configuring Tenants
          • Configuring Master Data
          • Adding New Master
          • State Level Vs City Level Master
      • Payment Gateway Service
      • User Session Management
      • Indexer Service
        • Indexer Configuration
      • URL Shortening Service
      • XState Core Chatbot
        • Xstate-Chatbot Message Localisation
        • XState-Chatbot Integration Document
      • NLP Engine Service
        • NLP Chatbot
      • SMS Template Approval Process
      • Telemetry Service
      • Document Uploader Service
      • Notification Enhancement Based On Different Channel
      • Report Service
        • Configuring New Reports
          • Impact Of Heavy Reports On Platform
          • Types Of Reports Used In Report Service
      • SMS Notification Service
        • Setting Up SMS Gateway
          • Using The Generic GET & POST SMS Gateway Interface
      • Survey Service
      • Persister Service
        • Persister Configuration
      • Encryption Service
        • Encryption Client Library
        • User Data Security Architecture
        • Guidelines for supporting User Privacy in a module
      • FileStore Service
      • ID Generation Service
      • Localization Service
        • Configuring Localization
          • Setup Base Product Localization
          • Configure SMS and Email
      • Email Notification Service
      • Searcher Service
      • Zuul Service
      • User OTP Service
      • OTP Service
      • Chatbot Service
      • National Dashboard Ingest
        • National Dashboard API Performance Testing Specs and Benchmark
        • National Dashboard: Steps for Index Creation
        • National Dashboard Adaptor Service
          • Deployment of Airflow DAG
          • Trigger Airflow DAG
          • Configure Airflow
          • Insert & Delete Data - Steps
          • Important Links & Credentials
          • Code Structure
          • KT Sessions
          • Pre-requisites For Enabling Adaptor
        • Revenue Maximisation
      • Audit Service
        • Signed Audit Performance Testing Results
      • Service Request
      • Self Contained Service Architecture (HLD)
      • Accelerators
        • Inbox Service
    • ✏️API Specifications
      • User
      • Access Control
      • Employee
      • Location
      • Localisation
      • Encryption
      • Indexer
      • File Store
      • Collection
      • DSS Ingest
      • HRMS
      • National Dashboard Ingest
      • WhatsApp Chatbot
      • Master Data Management
      • ID Generation
      • URL Shortner
      • Workflow Service
      • Workflow v2
      • Document Uploader Service
      • OTP Service
      • Reporting Service
      • PDF Generation Service
      • Payment Gateway Service
    • 🔐Data Protection & Privacy
      • Data Protection & Privacy Definitions
      • Legal Obligations For Privacy - eGov
      • Data Protection & Privacy - Global Best Practices
      • Guidelines
        • Platform Owner Guidelines
        • Implementing Agencies Guidelines
        • Admin Guidelines
        • Program Owner Guidelines
        • Data Security and Data Privacy
      • Data Privacy Policy Templates
        • eGov Data Privacy Policy
        • Implementing Agency Privacy Policy
        • Admin & Program Owner Privacy Policy
        • Supporting Agency Privacy Policy
      • Global Standards For All Roles
    • ▶️Get Started
      • Install DIGIT
      • Access DIGIT
      • Sandbox
      • Training and Certification
        • Training Resources
    • ⚒️Integrations
      • Payment
      • Notification
      • Transaction
      • Verification
      • View
      • Calculation
    • 🛣️Roadmap
    • 🎬Open Events
    • 👩‍💻Source Code
    • 👁️Project Plan
    • 📋Discussion Board
    • 🤝Contribute
  • Guides
    • 📓Installation Guide
      • DIGIT Deployment
      • Quick Setup
        • DIGIT Installation on Azure
        • DIGIT Installation on AWS
      • Production Setup
        • AWS
          • 1. Pre-requisites
          • 2. Understanding EKS
          • 3. Setup AWS Account
          • 4. Provisioning Infra Using Terraform
          • 5. Prepare Deployment Config
          • 6. Deploy DIGIT
          • 7. Bootstrap DIGIT
          • 8. Productionize DIGIT
          • FAQ
        • Azure
          • 1. Azure Pre-requisites
          • 2. Understanding AKS
          • 3. Infra-as-code (Terraform)
        • SDC
          • 1. SDC Pre-requisites
          • 2. Infra-as-code (Kubespray)
          • CI/CD Setup On SDC
        • CI/CD Set Up
          • CI/CD Build Job Pipeline Setup
        • Prepare Helm Release Chart
        • Deployment - Key Concepts
          • Security Practices
          • Readiness & Liveness
          • Resource Requests & Limits
          • Deploying DIGIT Services
          • Deployment Architecture
          • Routing Traffic
          • Backbone Deployment
    • 💽Data Setup Guide
      • User Module
      • Localisation Module
      • Location Module
    • 🚥Design Guide
      • Model Requirements
      • Design Services
      • Design User Interface
      • Checklists
    • ⚒️Developer Guide
      • Pre-requisites Training Resources
      • Backend Developer Guide
        • Section 0: Prep
          • Development Pre-requisites
          • Design Inputs
            • High Level Design
            • Low Level Design
          • Development Environment Setup
        • Section 1: Create Project
          • Generate Project Using API Specs
          • Create Database
          • Configure Application Properties
          • Import Core Models
          • Implement Repository Layer
          • Create Validation & Enrichment Layers
          • Implement Service Layer
          • Build The Web Layer
        • Section 2: Integrate Persister & Kafka
          • Add Kafka Configuration
          • Implement Kafka Producer & Consumer
          • Add Persister Configuration
          • Enable Signed Audit
          • Run Application
        • Section 3: Integrate Microservices
          • Integrate IDGen Service
          • Integrate User Service
          • Add MDMS Configuration
          • Integrate MDMS Service
          • Add Workflow Configuration
          • Integrate Workflow Service
          • Integrate URL Shortener Service
        • Section 4: Integrate Billing & Payment
          • Custom Calculator Service
          • Integrate Calculator Service
          • Payment Back Update
        • Section 5: Other Advanced Integrations
          • Add Indexer Configuration
          • Certificate Generation
        • Section 6: Run Final Application
        • Section 7: Build & Deploy Instructions
        • FAQs
      • Flutter UI Developer Guide
        • Introduction to Flutter
          • Flutter - Key Features
          • Flutter Architecture & Approach
          • Flutter Pre-Requisites
        • Setup Development Environment
          • Flutter Installation & Setup Guide
          • Setup Device Emulators/Simulators
          • Run Application
        • Build User Interfaces
          • Create Form Screen
        • Build Deploy & Publish
          • Build & Deploy Flutter Web Application
          • Generate Android APKs & App Bundles
          • Publishing App Bundle To Play Store
        • State Management With Provider & Bloc
          • Provider State Management
          • BloC State Management
        • Best Practices & Tips
        • Troubleshooting
      • UI Developer Guide
        • DIGIT-UI
        • Android Web View & How To Generate APK
        • DIGIT UI Development Pre-requisites
        • UI Configuration (DevOps)
        • Local Development Setup
        • Run Application
        • Create New Screen In DIGIT-UI
          • Create Screen (FormComposer)
          • Inbox/Search Screen
          • Workflow Component
        • Customisation
          • Integrate External Web Application/UI With DIGIT UI
          • Utility - Pre-Process MDMS Configuration
          • CSS Customisation
        • Citizen Module Setup
          • Sample screenshots
          • Project Structure
          • Install Dependency
          • Import Required Components
          • Write Citizen Module Code
          • Citizen Landing Screen
        • Employee Module Setup
          • Write Employee Module Code
        • Build & Deploy
        • Setup Monitoring Tools
        • FAQs
          • Troubleshoot Using Browser Network Tab
          • Debug Android App Using Chrome Browser
    • 🔄Operations Guide
      • DIGIT - Infra Overview
      • Setup Central Instance Infra
      • Central Monitoring Dashboard Setup
      • Kubernetes
        • RBAC Management
        • DB Dump - Playground
      • Setup Jenkins - Docker way
      • GitOps
        • Git Client installation
        • GitHub organization creation
        • Adding new SSH key to it
        • GitHub repo creation
        • GitHub Team creation
        • Enabling Branch protection:
        • CODEOWNER Reviewers
        • Adding Users to the Git
        • Setting up an OAuth with GitHub
        • Fork (Fork the mdms,config repo with a tenant-specific branch)
      • Working with Kubernetes
        • Installation of Kubectl
      • Containerizing application using Docker
        • Creation of Dockerhub account
      • Infra provisioning using Terraform
        • Installation of Terraform
      • Customization of existing tf templates
      • Cert-Manager
        • Obtaining SSL certificates with the help of cluster-issuer
      • Moving Docker Images
      • Pre and post deployment checklist
      • Multi-tenancy Setup
      • Availability
        • Infrastructure
        • Backbone services
          • Database
          • Kafka
          • Kafka Connect
          • Elastic search
            • ElasticSearch Direct Upgrade
            • Elastic Search Rolling Upgrade
        • Core services
        • DIGIT apps
        • DSS dashboard
      • Observability
        • ES-Curator to clear old logs/indices
        • Monitoring
        • Tracing
        • Jaeger Tracing Setup
        • Logging
        • eGov Monitoring & Alerting Setup
        • eGov Logging Setup
      • Performance
        • What to monitor?
          • Infrastructure
          • Backbone services
          • Core services
        • Identifying bottlenecks
        • Solutions
      • Handling errors
      • Security
      • Reliability and disaster recovery
      • Privacy
      • Skillsets/hiring
      • Incident management processes
      • Kafka Troubleshooting Guide
        • How to clean up Kafka logs
        • How to change or reset consumer offset in Kafka?
      • SRE Rituals
      • FAQs
        • I am unable to login to the citizen or employee portal. The UI shows a spinner.
        • My DSS dashboard is not reflecting accurate numbers? What can I do?
      • Deployment using helm
        • Helm installation:
        • Helm chart creation
        • Helm chart customization
      • How to Dump Elasticsearch Indexes
      • Deploy Nginx-Ingress-Controller
      • Deployment Job Pipeline Setup
      • OAuth2-Proxy Setup
      • Jira Ticket Creation
  • Reference
    • 👉Setup Basics
      • Setup Requirements
        • Tech Enablement Training - Essential Skills and Pre-requisites
        • Tech Enablement Training (eDCR) - Essential Skills and Prerequisites
          • Development Control Rules (Digit-DCR)
          • eDCR Approach Guide
        • DIGIT Rollout Program Governance
        • DevOps Skills Requirements
        • Infra Requirements
        • Team Composition for DIGIT Implementation
        • Infra Best Practices
        • Operational Best Practices
        • Why Kubernetes For DIGIT
      • Supported Clouds
        • Google Cloud
        • Azure
        • AWS
        • VSphere
        • SDC
      • Deployment - Key Concepts
        • Security Practices
        • CI/CD
        • Readiness & Liveness
        • Resource Requests & Limits
      • Understanding ERP Stack
        • ERP Monolithic Architecture
        • ERP Hybrid Architecture
        • ERP Coexistence Architecture
        • APMDP-HYBRID-INFRA ARCHITECTURE
        • eGov SmartCity eGovernance Suite
        • ERP Deployment Process
        • ERP Release Process
        • ERP User Guide
      • Deploying DIGIT Services
        • Deployment Architecture
        • Routing Traffic
        • Backbone Deployment
      • Troubleshooting
        • Distributed Tracing
        • Logging
        • Monitoring & Alerts
    • 📥Reference Reads
      • Analytics
      • DevSecOps
      • Low Code No Code
        • Application Specification
      • Beneficiary Eligibility
      • Government and Open Digital Platforms
      • Microservices and Low Code No Code
      • Registries
      • Platform Orientation - Overview
    • 🔏Data Security
      • Signed Data Audit
      • Encryption Techniques
      • Approaches to handle Encrypted Data
    • ❕Privacy
    • 🕹️DevOps
      • 1. How DNS works
      • 2. Load Balancer
      • 3. SSL/Cert-manager
      • 4.Ingress,WAF
      • 5.VPC
      • 6.Subnets
      • 7.EKS
      • 8.Worker Node Group
      • 9.RDS
      • 10.NAT
      • 11.Internet Gateway
      • 12.Block Storage (EBS Volumes)
      • 13.Object Storage (S3)
      • 14. Telemetry
Powered by GitBook

All content on this page by eGov Foundation is licensed under a Creative Commons Attribution 4.0 International License.

On this page
  • Introduction
  • What is needed to build a meaningful logging system in MSA?
  • 1. Use a Unique Id to correlate Requests
  • 2. Centralise Logging data in one place
  • 3. Define the format for logging
  • 4. Log useful/meaningful data
  • 5. Consider storing Personally identifiable information (PII) of your end-users
  • Logging approaches in MSA

Was this helpful?

  1. Reference
  2. Setup Basics
  3. Troubleshooting

Logging

A good/meaningful logging system is a system that everyone can use and understand. How Digit Logging is configured.

PreviousDistributed TracingNextMonitoring & Alerts

Last updated 2 years ago

Was this helpful?

Introduction

The logging concern is one of the most complicated parts of our microservices. Microservices should stay as pure as possible. So, we shouldn’t use any library if we can (like logging, monitoring, resilience library dependencies). It means, every dependency can change any time and then usually, we must do that change for the other microservices. There is a lot of work here. Instead of that, we need to handle these dependencies with a more generic way. For logging, the way is the stdout logging. For most of the programming languages, logging to stdout is the default way and probably no additional change required at the beginning.

What is needed to build a meaningful logging system in MSA?

1. Use a Unique Id to correlate Requests

In MSA, services interact with each other through an HTTP endpoint. End users only know about API Contract (Request/Response), and don’t know how exactly do services work.

“A service” will call “B service” and “C service”. Once the request chain is complete, “X service” might be able to respond to the end-user who initiated the request. Let’s say you already have a logging system that captures error logs for each service. If you find an error in “X service”, it would be better if you know exactly whether the error was caused by “A service” or “C service”. If the error is informative enough for you. But if that isn’t the case, the correct way to reproduce that error is to know all requests and services that involved. Once you implement Correlation Id, you only need to look for that ID in the logging system. And you will get all logs from services that were part of the main request to the system.

2. Centralise Logging data in one place

The application usually adds more features as time goes by. Go along with this, there are so many services will be created new (my project started with 12 services, and now we have 20). These services could be hosted on different servers. Let’s imagine, what will happen if you store logging on different servers? — you will have to access to each individual server to read logs, then trying to correlate problems. Instead, you have everything that you need in one dashboard by centralized logging data in one place. If would save your time so much.

3. Define the format for logging

Applying MSA allows you to use different technology stacks for each service. For example, you can use .Net Core for Buy service, Java for Shipping service and Python for Inventory service. However, it also impacts to log format of each service. It’s even more complicated as some logs need more fields than others.

Based on my experience, I’d like to suggest JSON as a standard format for logging data. JSON allows you to have multiple levels for your data so that, when necessary, you can get more semantic info in a single log event.

4. Log useful/meaningful data

When we see the log one would want to know everything! What? When? Where?… even Who? — don’t think that we need to know exactly which person causes the problem to blame them :) Because, contacting the right person also helps you to resolve issues quicker. You can log all the data that you get. However, let us give some specific fields. This might help to figure out what really need to log.

  • When? — Time (with full date format): It doesn’t require using UTC format. But the timezone has to be the same for everyone that needs to look at the logs.

  • What? — Stack errors: All exception objects should be passed to the logging system.

  • Where? — Besides service name as we using MSA. We also need function name, class or file name where the error occurred. — Don’t guess anything, it might waste your time.

  • Who? — The IP address of the client and user name if any. Make sure don’t use this information to blame your teammates :)

Bear in mind that, logging system is not only for developers. It’s also used by others (system admin, tester…) So, you should consider logging data that everyone can use and understand.

5. Consider storing Personally identifiable information (PII) of your end-users

Logging approaches in MSA

There are two techniques for logging in MSA. Each service will implement the logging mechanism by itself and using one logging service for all services. Both of them have Good and Not Good points. — I’m using both these approaches in my project.

  1. Implement Logging in each service

With this approach, we can easily define the logging strategy/library for each service. For example, with service written by java we can use Log4j.

The problem with this approach is that it requires each service to implement its own logging methods. Not only is this redundant, but it also adds complexity and increases the difficulty of changing logging behaviour across multiple services.

2. Implement central Logging service

If you don’t want to implement logging in each service separately. You can consider implementing a central service for logging. This service will help you with processing, formatting and storing log data.

This approach might help to reduce the complexity of your application. However, you might get lost your log data if that service is down.

Sometimes, you log requests from end-users that contain PII. We need to be careful, it might violate .

Image for post
Image for post
👉
GDPR