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constellation/joinservice
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renovate[bot] 78fd2abc5f
Update gcr.io/distroless/static Docker digest to ea2ed73 (#920) 
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
2023-01-10 07:59:58 +01:00
..
cmd upgrade: support Kubernetes components (#839) 2023-01-03 12:09:53 +01:00
internal internal: move components into their own package 2023-01-09 12:16:54 +01:00
joinproto joinservice: use configmap for k8s components 2022-12-02 14:34:38 +01:00
Dockerfile Update gcr.io/distroless/static Docker digest to ea2ed73 (#920) 2023-01-10 07:59:58 +01:00
README.md Use CMake project version across all places & remove obsolete build tags 2022-09-09 15:33:16 +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=0.0.0
DOCKER_BUILDKIT=1 docker build --build-arg PROJECT_VERSION=${VERSION} -t ghcr.io/edgelesssys/constellation/join-service:v${VERSION} -f joinservice/Dockerfile .