Sonic Operator

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Overview ​

sonic-operator is a Kubernetes-native, declarative operator for onboarding and managing the lifecycle of bare-metal network switches.

Architecture ​

  • Controller manager runs in the cluster, reconciles CRDs, and maintains status.
  • Switch agent runs on the switch and exposes device/port/interface operations via gRPC.
  • Provisioning server serves ZTP scripts and ONIE installer artifacts over HTTP.

Reconciliation flow ​

  1. A Switch CR is created to represent a physical switch and its management endpoint.
  2. The controller connects to the switch agent and observes device state.
  3. The controller creates/updates SwitchInterface CRs based on discovered interfaces.
  4. Interface admin state in SwitchInterface.spec is enforced on the device.
  5. Status fields are updated on Switch, SwitchInterface based on observed state.

Provisioning flow ​

  • ZTP scripts are rendered from templates and served at GET /ztp.
  • ONIE installers are served from a configured directory at HTTP root (/).
  • The provisioning server can run embedded in the manager or as a standalone binary.
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