# Service Mesh & Istio (DevOps) > Traffic management, observability, security, sidecars, virtual services, gateways, perbandingan Linkerd - 24 pertanyaan wawancara - Senior - [Pertanyaan Wawancara: DevOps](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara.md) ## 1. Apa peran utama service mesh seperti Istio dalam arsitektur microservices? **Jawaban** Service mesh mengelola komunikasi antar microservices dengan menyediakan fitur traffic management, observability, dan security tanpa memodifikasi kode aplikasi. Istio menyuntikkan sidecar proxy (Envoy) di samping setiap pod untuk mengintersep dan mengelola semua lalu lintas jaringan. Ini memusatkan konfigurasi retry, timeout, circuit breaking, mTLS, dan distributed tracing di tingkat infrastruktur, bukan di tingkat aplikasi. ## 2. Bagaimana cara kerja pola sidecar di Istio dan proxy mana yang digunakan secara default? **Jawaban** Istio secara otomatis menyuntikkan container Envoy proxy sebagai sidecar ke setiap pod aplikasi melalui mutating admission webhook. Sidecar ini mengintersep semua lalu lintas masuk dan keluar dari container aplikasi, memungkinkan kebijakan traffic management, security, dan observability tanpa perubahan kode. Envoy dipilih karena kinerjanya yang tinggi, dukungan protokol modern (HTTP/2, gRPC), dan kemampuan menangani dynamic configuration melalui xDS APIs. ## 3. Apa perbedaan antara control plane dan data plane di Istio? **Jawaban** Control plane (Istiod) mengelola konfigurasi, menemukan layanan, dan mendistribusikan aturan ke proxy melalui xDS APIs. Berisi Pilot untuk service discovery, Citadel untuk certificate management, dan Galley untuk configuration validation. Data plane terdiri dari sidecar Envoy yang menjalankan aturan lalu lintas dengan mengintersep dan merutekan permintaan antar layanan. Istiod tidak pernah menyentuh lalu lintas aplikasi, hanya sidecar yang melakukannya. ## 21 pertanyaan lagi tersedia - Apa peran VirtualService di Istio? - Apa perbedaan antara Gateway dan VirtualService di Istio? Daftar gratis: https://sharpskill.dev/id/login ## Topik wawancara DevOps lainnya - [Kontrol Versi & Git](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/version-control-git.md): 20 pertanyaan, Junior - [Dasar-dasar Linux](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/linux-fundamentals.md): 22 pertanyaan, Junior - [Shell Scripting & Bash](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/shell-scripting-bash.md): 20 pertanyaan, Mid-Level - [Dasar-Dasar Networking](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/networking-basics.md): 22 pertanyaan, Junior - [Dasar-Dasar Docker](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/docker-fundamentals.md): 24 pertanyaan, Junior - [Dasar-Dasar CI/CD](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/ci-cd-fundamentals.md): 18 pertanyaan, Junior - [GitHub Actions](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/github-actions.md): 22 pertanyaan, Mid-Level - [GitLab CI/CD](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/gitlab-ci.md): 22 pertanyaan, Mid-Level - [Jenkins](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/jenkins.md): 22 pertanyaan, Mid-Level - [Dasar-dasar Kubernetes](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/kubernetes-basics.md): 26 pertanyaan, Mid-Level - [Networking Kubernetes](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/kubernetes-networking.md): 24 pertanyaan, Mid-Level - [Kubernetes Lanjutan](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/kubernetes-advanced.md): 24 pertanyaan, Mid-Level - [Ingress & API Gateway](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/ingress-api-gateway.md): 20 pertanyaan, Mid-Level - [Dasar-dasar Terraform](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/terraform-basics.md): 22 pertanyaan, Mid-Level - [Terraform Lanjutan](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/terraform-advanced.md): 22 pertanyaan, Mid-Level - [Ansible & Configuration Management](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/ansible-configuration.md): 20 pertanyaan, Mid-Level - [Dasar-Dasar AWS](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/aws-essentials.md): 26 pertanyaan, Mid-Level - [Dasar-Dasar Azure](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/azure-fundamentals.md): 22 pertanyaan, Mid-Level - [Dasar-Dasar GCP](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/gcp-fundamentals.md): 22 pertanyaan, Mid-Level - [Monitoring & Prometheus](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/monitoring-prometheus.md): 22 pertanyaan, Mid-Level - [Logging & ELK Stack](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/logging-elk.md): 20 pertanyaan, Mid-Level - [Alerting & Incident Response](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/alerting-incident-response.md): 20 pertanyaan, Mid-Level - [Cloud Identity & Secrets](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/cloud-identity-secrets.md): 22 pertanyaan, Mid-Level - [Keamanan Pipeline CI/CD](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/cicd-pipeline-security.md): 20 pertanyaan, Mid-Level - [Helm & Kubernetes](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/helm-kubernetes.md): 20 pertanyaan, Mid-Level - [Keamanan Runtime & Cluster](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/runtime-cluster-security.md): 24 pertanyaan, Senior - [Container Supply Chain Security](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/container-supply-chain.md): 22 pertanyaan, Senior - [GitOps & ArgoCD](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/gitops-argocd.md): 22 pertanyaan, Senior - [Progressive Delivery](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/progressive-delivery.md): 20 pertanyaan, Senior - [Observability Terdistribusi](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/observability-distributed.md): 22 pertanyaan, Senior - [Disaster Recovery & Backup](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/disaster-recovery.md): 20 pertanyaan, Senior - [Optimasi Performa](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/performance-optimization.md): 22 pertanyaan, Senior - [Optimasi Biaya Cloud](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/infrastructure-cost.md): 20 pertanyaan, Senior - [Prinsip SRE](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/sre-principles.md): 24 pertanyaan, Senior - [Chaos Engineering](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/chaos-engineering.md): 20 pertanyaan, Senior - [Platform Engineering](https://sharpskill.dev/id/technologies/devops/pertanyaan-wawancara/platform-engineering.md): 22 pertanyaan, Senior --- Source: SharpSkill (https://sharpskill.dev), tech interview preparation for your real stack. 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