Mirror of Istio: Connect, secure, control, and observe services.
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
Chris Wilson 338a788766 Respect pod injection annotation for injection analysis (#18810) 6 hours ago
.github Update to latest version of istio.io/pkg (#15103) 4 months ago
bin Fix protoc.sh to output retry logging on stderr (#18669) 6 days ago
cmd/istiod Istiod agent (#18314) 3 days ago
common Updating image to match prow. (#18811) 2 days ago
common-protos Update generated files. (#17576) 1 month ago
docker Add dockerfile to istiod (#18125) 3 weeks ago
galley Respect pod injection annotation for injection analysis (#18810) 6 hours ago
install Don't set `request.host` as label for ingress (#18821) 2 days ago
istioctl cleanup remote secrets when the cluster's discovery is not registered (#18724) 3 days ago
licenses fix(mixer): remove signalfx adapter (#18760) 3 days ago
mixer fix(mixer): remove signalfx adapter (#18760) 3 days ago
pilot fix condition for skipping eds updates (#18846) 9 hours ago
pkg break loop if collection and peerAddr exists (#18727) 19 hours ago
prow Bump operator and release builder (#18742) 3 days ago
release - Add new beta pattern to the exclusion list (#18608) 1 week ago
samples Add its own service account for httpbin (#18444) 4 days ago
security Extra checks to avoid breaking ingress - which is not yet fully switched (#18794) 3 days ago
sidecar-injector Support run as non-root for pilot/galley/mixer/sidecar-injection/citadel (#16014) 3 weeks ago
tests istio-iptables: Fix golden files for golang implementation (#18610) 2 days ago
tools istio-iptables: Add option to use iptables-restore (#18622) 1 day ago
.codecov.yml Include js/css files into static folder (#12983) 7 months ago
.gitattributes Update common files. (#16989) 2 months ago
.gitignore Get rid of demo-auth (#17043) 1 month ago
BUGS-AND-FEATURE-REQUESTS.md Update common files. (#14914) 4 months ago
CODEOWNERS @istio/wg-user-experience-maintainers should own istioctl integration tests (#18299) 2 weeks ago
CONTRIBUTING.md Add a local CONTRIBUTING.md file that points to the main one on istio/community. (#1871) 1 year ago
LICENSE Import common files into this repo. (#14473) 5 months ago
Makefile Updating image to match prow. (#18811) 2 days ago
Makefile.core.mk Workaround nondeterministic linting (#18579) 6 days ago
Makefile.overrides.mk Update golangci-lint to 1.21 (#18279) 2 weeks ago
README.md Dummy change to trigger postsubmit. 2 weeks ago
SUPPORT.md Update common files. (#16989) 2 months ago
codecov.skip Remove unused security tests and integration_old (#18395) 1 week ago
codecov.threshold Use random seeds for jitter in node agent and update test coverage threshold (#17630) 1 month ago
go.mod fix(mixer): remove signalfx adapter (#18760) 3 days ago
go.sum fix(mixer): remove signalfx adapter (#18760) 3 days ago
istio.deps Update proxy SHA (#18768) 3 days ago


Go Report Card GoDoc codecov.io GolangCI


An open platform to connect, manage, and secure microservices.

  • For in-depth information about how to use Istio, visit istio.io
  • To ask questions and get assistance from our community, visit discuss.istio.io
  • To learn how to participate in our overall community, visit our community page

In this README:

In addition, here are some other documents you may wish to read:

You’ll find many other useful documents on our Wiki.


Istio is an open platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio’s control plane provides an abstraction layer over the underlying cluster management platform, such as Kubernetes.

Istio is composed of these components:

  • Envoy - Sidecar proxies per microservice to handle ingress/egress traffic between services in the cluster and from a service to external services. The proxies form a secure microservice mesh providing a rich set of functions like discovery, rich layer-7 routing, circuit breakers, policy enforcement and telemetry recording/reporting functions.

Note: The service mesh is not an overlay network. It simplifies and enhances how microservices in an application talk to each other over the network provided by the underlying platform.

  • Mixer - Central component that is leveraged by the proxies and microservices to enforce policies such as authorization, rate limits, quotas, authentication, request tracing and telemetry collection.

  • Pilot - A component responsible for configuring the proxies at runtime.

  • Citadel - A centralized component responsible for certificate issuance and rotation.

  • Citadel Agent - A per-node component responsible for certificate issuance and rotation.

  • Galley- Central component for validating, ingesting, aggregating, transforming and distributing config within Istio.

Istio currently supports Kubernetes and Consul-based environments. We plan support for additional platforms such as Cloud Foundry, and Mesos in the near future.


The Istio project is divided across a few GitHub repositories.

  • istio/istio. This is the main repository that you are currently looking at. It hosts Istio’s core components and also the sample programs and the various documents that govern the Istio open source project. It includes:

    • security. This directory contains security related code, including Citadel (acting as Certificate Authority), citadel agent, etc.

    • pilot. This directory contains platform-specific code to populate the abstract service model, dynamically reconfigure the proxies when the application topology changes, as well as translate routing rules into proxy specific configuration.

    • istioctl. This directory contains code for the istioctl command line utility.

    • mixer. This directory contains code to enforce various policies for traffic passing through the proxies, and collect telemetry data from proxies and services. There are plugins for interfacing with various cloud platforms, policy management services, and monitoring services.

  • istio/api. This repository defines component-level APIs and common configuration formats for the Istio platform.

  • istio/proxy. The Istio proxy contains extensions to the Envoy proxy (in the form of Envoy filters), that allow the proxy to delegate policy enforcement decisions to Mixer.

Issue management

We use GitHub combined with ZenHub to track all of our bugs and feature requests. Each issue we track has a variety of metadata:

  • Epic. An epic represents a feature area for Istio as a whole. Epics are fairly broad in scope and are basically product-level things. Each issue is ultimately part of an epic.

  • Milestone. Each issue is assigned a milestone. This is 0.1, 0.2, …, or ‘Nebulous Future’. The milestone indicates when we think the issue should get addressed.

  • Priority/Pipeline. Each issue has a priority which is represented by the Pipeline field within GitHub. Priority can be one of P0, P1, P2, or >P2. The priority indicates how important it is to address the issue within the milestone. P0 says that the milestone cannot be considered achieved if the issue isn’t resolved.

We don’t annotate issues with Releases; Milestones are used instead. We don’t use GitHub projects at all, that support is disabled for our organization.