mirror of https://github.com/edgelesssys/constellation.git synced 2024-10-01 01:36:09 -04:00

History

Malte Poll 3a5753045e goleak: ignore rules_go SIGTERM handler rules_go added a SIGTERM handler that has a goroutine that survives the scope of the goleak check. Currently, the best known workaround is to ignore this goroutine. https://github.com/uber-go/goleak/issues/119 https://github.com/bazelbuild/rules_go/pull/3749 https://github.com/bazelbuild/rules_go/pull/3827#issuecomment-1894002120		2024-01-22 13:11:58 +01:00
..
cmd	joinservice: cache certificates for Azure SEV-SNP attestation (#2336 )	2023-09-29 14:29:50 +02:00
internal	goleak: ignore rules_go SIGTERM handler	2024-01-22 13:11:58 +01:00
joinproto	versions: consolidate various types of Components	2023-12-11 14:26:54 +01:00
README.md	bazel: remove apko and Dockerfile where Bazel is used to build container images	2023-04-18 15:35:15 +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 keyservice. 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.

Docker image

Build the image:

bazel build //joinservice/cmd:joinservice
bazel build //bazel/release:joinservice_sum
bazel build //bazel/release:joinservice_tar
bazel run //bazel/release:joinservice_push