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constellation/joinservice
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Moritz Eckert b95f3dbc91
Add docs to repo (#38)
2022-09-02 11:52:42 +02:00
..
cmd Move cloud metadata packages and kubernetes resources marshaling to internal 2022-08-29 16:07:55 +02:00
internal AB#2333: Add AMD SNP-based attestation 2022-08-29 16:29:33 +02:00
joinproto AB#2200 Merge Owner and Cluster ID (#282) 2022-07-26 10:58:39 +02:00
Dockerfile Simplify joinproto 2022-07-14 17:25:18 +02:00
README.md Add docs to repo (#38) 2022-09-02 11:52:42 +02:00

README.md

Join Service

Implementation for Constellation's node flow to join an existing cluster.

The join service runs on each control-plane node of the Kubernetes cluster. New nodes (at cluster start, or later through autoscaling) send an IssueJoinTicket request to the service over aTLS. The join service verifies the new nodes certificate and attestation statement. If attestation is successful, the new node is supplied with a disk encryption key for its state disk, and a Kubernetes bootstrap token, so it may join the cluster.

Packages

joinproto

Proto definitions for the join service.

internal/server

The server implements gRPC endpoints for joining the cluster and holds the main application logic.

Connections between the join service and joining nodes are secured using aTLS

sequenceDiagram
    participant New Node
    participant Join Service
    New Node-->>Join Service: aTLS Handshake (server side verification)
    Join Service-->>New Node: #
    New Node->>+Join Service: grpc::IssueJoinTicket(DiskUUID, NodeName, IsControlPlane)
    Join Service->>+KMS: grpc::GetDataKey(DiskUUID)
    KMS->>-Join Service: DiskEncryptionKey
    Join Service->>-New Node: [DiskEncryptionKey, KubernetesJoinToken, ...]

internal/kms

Implements interaction with Constellation's key management service. This is needed for fetching data encryption keys for joining nodes.

internal/kubeadm

Implements interaction with the Kubernetes API to create join tokens for new nodes.

Dockerfile

export VERSION=1.0.0
DOCKER_BUILDKIT=1 docker build --build-arg PROJECT_VERSION=${VERSION} -t ghcr.io/edgelesssys/constellation/join-service:v${VERSION} -f joinservice/Dockerfile .