mirror of https://github.com/istio/istio.io.git
37 lines
1.8 KiB
Markdown
37 lines
1.8 KiB
Markdown
---
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title: Pilot
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description: Introduces Pilot, the component responsible for managing a distributed deployment of Envoy proxies in the service mesh.
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weight: 10
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keywords: [traffic-management,pilot]
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aliases:
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- /docs/concepts/traffic-management/manager.html
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---
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Pilot is responsible for the lifecycle of Envoy instances deployed
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across the Istio service mesh.
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{{< image width="60%" ratio="72.17%"
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link="./PilotAdapters.svg"
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caption="Pilot Architecture"
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>}}
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As illustrated in the figure above, Pilot maintains a canonical
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representation of services in the mesh that is independent of the underlying
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platform. Platform-specific adapters in Pilot are responsible for
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populating this canonical model appropriately. For example, the Kubernetes
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adapter in Pilot implements the necessary controllers to watch the
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Kubernetes API server for changes to the pod registration information, ingress
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resources, and third party resources that store traffic management rules.
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This data is translated into the canonical representation. Envoy-specific
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configuration is generated based on the canonical representation.
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Pilot exposes APIs for [service discovery](https://www.envoyproxy.io/docs/envoy/latest/api-v1/cluster_manager/sds),
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dynamic updates to [load balancing pools](https://www.envoyproxy.io/docs/envoy/latest/configuration/cluster_manager/cds)
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and [routing tables](https://www.envoyproxy.io/docs/envoy/latest/configuration/http_conn_man/rds).
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These APIs decouple Envoy from platform-specific nuances, simplifying the
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design and increasing portability across platforms.
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Operators can specify high-level traffic management rules through
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[Pilot's Rules API](/docs/reference/config/istio.routing.v1alpha1/). These rules are translated into low-level
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configurations and distributed to Envoy instances via the discovery API.
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