The Istio mixer provides three distinct features:

• Precondition Checking. The Check method enables the caller to verify a number of preconditions before responding to an incoming request from a service consumer. Preconditions can include whether the service consumer is on the service's whitelist, whether the service consumer has the right access privilege, and more.

• Telemetry Reporting. The Report method enables services to produce logging and monitoring streams intended for service consumers.

• Quota Management. The Quota method enables services to allocate and free quota on a number of dimensions, Quotas are used as a relatively simple resource management tool to provide some fairness between service consumers when contending for limited service resources.

To learn more...

• Mixer user guide
• Using the mixer API
• Contributing to the project

If you have a question about the Istio mixer or have a problem using it, please file an issue.