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bongoDev | Production Troubleshooting Pro - Knowledge Hub

Knowledge Hub/Production Troubleshooting Pro

Englishবাংলা

Learning path

Production Troubleshooting Pro

Evidence-driven troubleshooting across applications, Linux, networking, DNS, TLS, containers, Kubernetes, cloud, databases, Redis, queues/Kafka, storage, CI/CD, GitOps, configuration, dependencies, performance, capacity, distributed systems and production-safe mitigation.

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৳ 320.00৳ 120.00Save ৳ 200.00

Lessons

48 published lessons · 1 free preview

Some lessons are not available in this language yet. Those lessons open in English.

01Production Troubleshooting Mental Model: Evidence Before ActionBuild a disciplined troubleshooting loop that moves from user impact to evidence, hypothesis, safe test, mitigation and verification.শুরুর স্তর · 30 মিনিটের পাঠফ্রি প্রিভিউফ্রি প্রিভিউ
02Troubleshooting vs Incident Response vs Root Cause Analysis

Separate live diagnosis, coordinated incident response and post-incident causal analysis so each activity happens at the right time.

শুরুর স্তর · 24 মিনিটের পাঠ

লক করা

লক করা

03Hypothesis-Driven Troubleshooting: Use the Scientific MethodUse falsifiable hypotheses and predicted evidence to replace random debugging with controlled learning.শুরুর স্তর · 28 মিনিটের পাঠলক করালক করা

04Scope, Timeline & Recent Change: Establish the Shape of the FailureDetermine who is affected, where, when, how much and what changed before going deep into any subsystem.শুরুর স্তর · 30 মিনিটের পাঠলক করালক করা

05Trace the Critical Request Path: Edge → Service → Dependency → DataMap the full request path so symptoms are tested layer by layer instead of blamed on the nearest visible component.মাঝারি · 32 মিনিটের পাঠলক করালক করা

06Observability Evidence: Correlate Metrics, Logs, Traces & EventsCombine metrics, logs, traces and change events to answer different troubleshooting questions without relying on a single telemetry type.মাঝারি · 32 মিনিটের পাঠলক করালক করা

07Evidence Hygiene: Timestamps, Vantage Points, Baselines & State PreservationCollect trustworthy evidence with clear timestamps, source, baseline and limitations while protecting sensitive data and volatile state.মাঝারি · 28 মিনিটের পাঠলক করালক করা

08Production Triage Decision Tree: Classify Before You DiveClassify symptoms into traffic, compute, memory, storage, network, dependency, data or change domains to choose the highest-value next test.মাঝারি · 30 মিনিটের পাঠলক করালক করা

09Linux Host Triage: Establish Host Health in Five MinutesUse a bounded Linux triage sequence to determine whether CPU, memory, storage, process, network or kernel conditions are constraining the service.মাঝারি · 34 মিনিটের পাঠলক করালক করা

10CPU Saturation, Load, Scheduler Pressure & ThrottlingDistinguish true CPU saturation from load, throttling, lock contention and I/O wait, then choose the correct mitigation.উন্নত · 34 মিনিটের পাঠলক করালক করা

11Memory Pressure, OOM, Leaks, Swap & Garbage CollectionDiagnose memory exhaustion without confusing Linux cache usage, application heap pressure, container limits and OOM kills.উন্নত · 36 মিনিটের পাঠলক করালক করা

12Disk, Filesystems, Inodes & I/O LatencyTroubleshoot storage failures caused by full filesystems, inode exhaustion, read-only mounts, device latency, IOPS limits and noisy I/O.উন্নত · 36 মিনিটের পাঠলক করালক করা

13Processes, Threads, File Descriptors & Socket ExhaustionFind process-level exhaustion such as stuck threads, zombie processes, file-descriptor limits, connection leaks and runaway child processes.উন্নত · 34 মিনিটের পাঠলক করালক করা

14systemd, Journald, Kernel & Boot-Time FailuresDiagnose service startup, dependency, permission, unit, kernel and boot issues using systemd and journald evidence.মাঝারি · 30 মিনিটের পাঠলক করালক করা

15Network Path Troubleshooting: Layer by LayerTroubleshoot connectivity by proving name resolution, route, reachability, transport, TLS and application response in sequence.মাঝারি · 34 মিনিটের পাঠলক করালক করা

16DNS Troubleshooting: Resolution, Delegation, Caching & Split-HorizonDiagnose DNS failures involving wrong answers, stale caches, search domains, delegation, TTLs, private/public zones and Kubernetes DNS.উন্নত · 36 মিনিটের পাঠলক করালক করা

17TCP, Ports & Connection States: Refused vs Timeout vs ResetInterpret TCP connection failures and socket states to distinguish missing listeners, filtering, resets, backlog pressure and connection leaks.উন্নত · 36 মিনিটের পাঠলক করালক করা

18TLS, Certificates, SNI & mTLS TroubleshootingDiagnose handshake, trust, hostname, expiration, chain, SNI and mutual-TLS failures without disabling verification.উন্নত · 38 মিনিটের পাঠলক করালক করা

19HTTP & API Troubleshooting: Status, Headers, Timeouts & PayloadsUse HTTP semantics and timing to distinguish authentication, routing, application, upstream and timeout failures.মাঝারি · 34 মিনিটের পাঠলক করালক করা

20CDN, WAF, Proxies & Load BalancersTroubleshoot edge and proxy layers including health checks, target registration, routing, headers, WAF rules, draining and upstream timeout behavior.উন্নত · 36 মিনিটের পাঠলক করালক করা

21Docker & Container Runtime TroubleshootingDiagnose image, startup, filesystem, network, healthcheck, resource and exit failures inside containers without treating containers as opaque boxes.মাঝারি · 36 মিনিটের পাঠলক করালক করা

22Kubernetes Pod & Container Lifecycle TroubleshootingInterpret Pod phase, container state, readiness, probes, restart reasons, events and rollout state to find workload failures.উন্নত · 40 মিনিটের পাঠলক করালক করা

23Kubernetes Services, DNS, CNI & NetworkPolicy TroubleshootingTroubleshoot pod-to-service traffic through Service selectors, EndpointSlices, DNS, kube-proxy/data plane, CNI and NetworkPolicy.উন্নত · 42 মিনিটের পাঠলক করালক করা

24Kubernetes Nodes, Scheduling, Evictions & Resource PressureDiagnose Pending pods, taints/affinity conflicts, node pressure, eviction, kubelet issues and resource fragmentation.উন্নত · 40 মিনিটের পাঠলক করালক করা

25Cloud Troubleshooting: IAM, Network, Quotas & Managed ServicesUse a cloud-layer checklist for identity, networking, quotas, control-plane state and managed-service limits across AWS, Azure or GCP.উন্নত · 40 মিনিটের পাঠলক করালক করা

26Database Troubleshooting: Connections, Locks, Slow Queries & ReplicasTroubleshoot database-backed incidents through connection pools, session limits, locks, query latency, replication and storage pressure.উন্নত · 42 মিনিটের পাঠলক করালক করা

27Redis & Cache Troubleshooting: Latency, Memory, Eviction & Hot KeysDiagnose cache incidents involving hit rate, memory pressure, eviction, hot keys, blocked clients, persistence and failover behavior.উন্নত · 38 মিনিটের পাঠলক করালক করা

28Queues, Kafka & Event Pipeline TroubleshootingTroubleshoot asynchronous systems through producer success, broker health, backlog, consumer lag, poison messages, retries and downstream bottlenecks.উন্নত · 40 মিনিটের পাঠলক করালক করা

29Storage Troubleshooting: Block, File, Object & Persistent VolumesReason about storage by semantics—block, file, object and Kubernetes PVs—so capacity, latency, mount and consistency failures are diagnosed correctly.উন্নত · 36 মিনিটের পাঠলক করালক করা

30CI/CD & Deployment Troubleshooting: When Production Breaks After ChangeTroubleshoot release failures by comparing artifact, configuration, rollout state, environment and runtime behavior without blaming the pipeline generically.উন্নত · 38 মিনিটের পাঠলক করালক করা

31GitOps & Argo CD Troubleshooting: Desired State vs Live StateDistinguish Git/repository, manifest-generation, diff, sync, Kubernetes and workload-health failures in GitOps deployments.উন্নত · 38 মিনিটের পাঠলক করালক করা

32Configuration, Secrets, Feature Flags & Environment DriftDiagnose failures caused by missing, stale, malformed or environment-specific configuration while keeping secrets protected.উন্নত · 38 মিনিটের পাঠলক করালক করা

33Dependency Failures, Timeouts, Retries & Cascading OutagesIdentify when a downstream dependency turns into an upstream outage through timeout mismatch, retry amplification, exhausted pools and missing isolation.উন্নত · 42 মিনিটের পাঠলক করালক করা

34Latency & Performance Troubleshooting: Find Where the Time GoesBreak latency into queueing, CPU, network, dependency, lock and storage time using percentiles and request-path evidence.উন্নত · 42 মিনিটের পাঠলক করালক করা

35Capacity, Autoscaling, Throttling & Rate-Limit TroubleshootingDiagnose when demand exceeds safe capacity or scaling/control mechanisms respond too late, too little or in the wrong dimension.উন্নত · 40 মিনিটের পাঠলক করালক করা

36Concurrency, Locks, Thread Pools & Race ConditionsTroubleshoot stalls and intermittent failures caused by lock contention, thread-pool exhaustion, deadlocks and race-sensitive timing.উন্নত · 42 মিনিটের পাঠলক করালক করা

37Time, Clock Skew, NTP, Token & Certificate FailuresRecognize failures caused by incorrect time, timezone assumptions, clock skew, expiry windows and distributed timestamp interpretation.উন্নত · 30 মিনিটের পাঠলক করালক করা

38Data Correctness, Stale Reads & Corruption TroubleshootingTroubleshoot cases where the service is available but returns stale, inconsistent, duplicated or corrupted data.উন্নত · 40 মিনিটের পাঠলক করালক করা

39Distributed-System Partial Failure & Consistency ProblemsReason about partial failure, partitions, duplicate delivery, leader changes, stale replicas and inconsistent views without expecting one global truth instantly.উন্নত · 42 মিনিটের পাঠলক করালক করা

40“Works Here, Fails There”: Environment & Vantage-Point TroubleshootingSystematically compare identity, network, DNS, version, configuration and data when a request succeeds in one environment or location but fails in another.মাঝারি · 34 মিনিটের পাঠলক করালক করা

41Production-Safe Mitigation: Restart, Rollback, Scale, Drain or Fail Over?Choose mitigation based on failure mode, reversibility, blast radius and evidence instead of using restart as the universal response.উন্নত · 40 মিনিটের পাঠলক করালক করা

42Escalation, Vendor Evidence & Knowing When to Stop DiggingEscalate with a concise evidence packet when ownership boundaries, access or time make further local debugging inefficient or unsafe.মাঝারি · 30 মিনিটের পাঠলক করালক করা

43Lab 1 — Slow API After Deployment: Find the BottleneckRun a realistic investigation where latency rises after deployment but the newest code is not automatically the root cause.উন্নত · 50 মিনিটের পাঠলক করালক করা

44Lab 2 — 502/503 Across Kubernetes & Load BalancerDiagnose an edge failure that crosses load balancer health checks, Kubernetes Service routing and application readiness.উন্নত · 50 মিনিটের পাঠলক করালক করা

45Lab 3 — Database Saturation, Cache Miss Storm & Queue BacklogTroubleshoot a cascading production failure where a cache event amplifies database load and creates asynchronous backlog.উন্নত · 55 মিনিটের পাঠলক করালক করা

46Cross-Stack Production Troubleshooting PlaybookUse one consistent cross-stack sequence to move from user impact to the failing layer across Linux, network, Kubernetes, cloud and data systems.উন্নত · 46 মিনিটের পাঠলক করালক করা

47Production Troubleshooting Command & Evidence PlaybookConnect common Linux, network, Kubernetes, Docker, database, Redis and Kafka commands to the exact question each can and cannot answer.উন্নত · 48 মিনিটের পাঠলক করালক করা

48Production Troubleshooting Pro CheatsheetA compact field reference for evidence-driven troubleshooting across application, host, network, Kubernetes, cloud and data layers.মাঝারি · 34 মিনিটের পাঠলক করালক করা