# istio/istio

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38,037 stars · 8,243 forks · Go · apache-2.0

## Links

- GitHub: https://github.com/istio/istio
- Homepage: https://istio.io
- awesome-repositories: https://awesome-repositories.com/repository/istio-istio.md

## Topics

`api-management` `circuit-breaker` `consul` `enforce-policies` `envoy` `fault-injection` `kubernetes` `lyft-envoy` `microservice` `microservices` `nomad` `polyglot-microservices` `proxies` `request-routing` `resiliency` `service-mesh`

## Description

Istio is a service mesh infrastructure that provides a centralized control plane to manage, secure, and observe communication between distributed microservices. It functions as a policy-driven network traffic controller, enabling developers to route, balance, and secure service-to-service traffic without requiring modifications to application code. The system enforces zero-trust security by utilizing mutual transport layer authentication to verify cryptographic identities for every network request.

The project distinguishes itself through a sidecar-less proxy architecture, which offloads networking tasks to shared infrastructure proxies rather than requiring individual proxies for every container. This approach is complemented by waypoint proxies, which perform deep packet inspection and enforce granular access policies at the application layer. Furthermore, the platform provides a unified connectivity fabric that synchronizes service registry data across multiple clusters, allowing for consistent traffic management and security policy enforcement across disparate network boundaries.

The system operates on a declarative model where a centralized management component continuously reconciles the desired state with the underlying network infrastructure. It supports both transport-layer and application-layer authorization, allowing for precise control over service access based on service accounts and specific request methods. The architecture is designed to simplify operational management and reduce resource overhead while maintaining consistent network behavior across complex, multi-cluster environments.

## Tags

### DevOps & Infrastructure

- [Service Mesh Control Planes](https://awesome-repositories.com/f/devops-infrastructure/service-mesh-control-planes.md) — Provides a centralized control plane to push declarative traffic and security policies to distributed proxies.
- [Service Meshes](https://awesome-repositories.com/f/devops-infrastructure/service-meshes.md) — Provides a control plane for managing communication, security, and observability across distributed microservices.
- [Sidecarless Service Meshes](https://awesome-repositories.com/f/devops-infrastructure/sidecarless-service-meshes.md) — Intercepts traffic using shared infrastructure proxies to reduce resource overhead.
- [Ambient Mesh Deployments](https://awesome-repositories.com/f/devops-infrastructure/ambient-mesh-deployments.md) — Deploys a service mesh architecture that removes sidecar proxies to simplify operations. ([source](https://istio.io/latest/docs/ambient/))
- [Microservice Traffic Management](https://awesome-repositories.com/f/devops-infrastructure/microservice-traffic-management.md) — Directs and balances network traffic between distributed services to ensure reliable communication.
- [Network Traffic Controllers](https://awesome-repositories.com/f/devops-infrastructure/network-traffic-controllers.md) — Routes, secures, and monitors application traffic flows between services without requiring code changes.
- [Sidecarless Network Architectures](https://awesome-repositories.com/f/devops-infrastructure/sidecarless-network-architectures.md) — Optimizes infrastructure performance by offloading networking tasks to shared proxies.
- [Multicluster Service Meshes](https://awesome-repositories.com/f/devops-infrastructure/multicluster-service-meshes.md) — Unifies multiple clusters into a single service mesh environment for cross-cluster traffic management. ([source](https://istio.io/latest/docs/ambient/install/multicluster/))
- [Waypoint Proxies](https://awesome-repositories.com/f/devops-infrastructure/waypoint-proxies.md) — Directs application-level traffic through specialized proxies for granular access control and inspection.
- [Declarative Infrastructure Reconciliation](https://awesome-repositories.com/f/devops-infrastructure/declarative-infrastructure-reconciliation.md) — Continuously monitors desired state and updates network infrastructure to match requirements.
- [Infrastructure Proxy Orchestrators](https://awesome-repositories.com/f/devops-infrastructure/infrastructure-proxy-orchestrators.md) — Deploys and configures network proxies to handle traffic at the infrastructure level.
- [Mesh Traffic Policy Management](https://awesome-repositories.com/f/devops-infrastructure/mesh-traffic-policy-management.md) — Manages service mesh traffic and security policies via a centralized control plane. ([source](https://istio.io/latest/docs/ambient/architecture/control-plane/))
- [Service Mesh Migration Tools](https://awesome-repositories.com/f/devops-infrastructure/service-mesh-migration-tools.md) — Migrates namespaces to ambient mode by reconfiguring traffic flows and removing sidecar injection. ([source](https://istio.io/latest/docs/ambient/migrate/enable-ambient-mode/))

### Security & Cryptography

- [Zero Trust Networking](https://awesome-repositories.com/f/security-cryptography/zero-trust-networking.md) — Enforces strict identity-based access controls and encryption for all service-to-service communication.
- [Mutual TLS Implementations](https://awesome-repositories.com/f/security-cryptography/mutual-tls-implementations.md) — Authenticates services using cryptographic identities verified at the transport layer.
- [Zero Trust Frameworks](https://awesome-repositories.com/f/security-cryptography/zero-trust-frameworks.md) — Enforces mutual authentication and granular access control policies for every network request between microservices.
- [Layer 4 Authorization Policies](https://awesome-repositories.com/f/security-cryptography/layer-4-authorization-policies.md) — Restricts network access by validating service accounts at the transport layer. ([source](https://istio.io/latest/docs/ambient/getting-started/enforce-auth-policies/))
- [Layer 7 Authorization Policies](https://awesome-repositories.com/f/security-cryptography/layer-7-authorization-policies.md) — Restricts application-level traffic by enforcing policies based on HTTP methods and service operations. ([source](https://istio.io/latest/docs/ambient/getting-started/enforce-auth-policies/))

### Networking & Communication

- [Cross-Cluster Service Discovery](https://awesome-repositories.com/f/networking-communication/cross-cluster-service-discovery.md) — Synchronizes service registry data across multiple network boundaries to enable seamless cross-cluster communication.
- [Multi-Cluster Connectivity Fabrics](https://awesome-repositories.com/f/networking-communication/multi-cluster-connectivity-fabrics.md) — Links disparate service environments into a unified, addressable network for cross-cluster communication.
- [Multi-Cluster Service Connectivity](https://awesome-repositories.com/f/networking-communication/multi-cluster-service-connectivity.md) — Links services across different clusters into a unified network for seamless communication.
- [Multi-Network Connectivity Tools](https://awesome-repositories.com/f/networking-communication/multi-network-connectivity-tools.md) — Configures individual cluster networks and gateways to enable cross-cluster communication. ([source](https://istio.io/latest/docs/ambient/install/multicluster/multi-primary_multi-network/))