mirror of
https://github.com/edgelesssys/constellation.git
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342 lines
10 KiB
Go
342 lines
10 KiB
Go
package storewrapper
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import (
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"encoding/json"
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"errors"
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"fmt"
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"net/netip"
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"strconv"
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"strings"
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"github.com/edgelesssys/constellation/coordinator/peer"
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"github.com/edgelesssys/constellation/coordinator/state"
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"github.com/edgelesssys/constellation/coordinator/store"
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kms "github.com/edgelesssys/constellation/kms/server/setup"
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kubeadm "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1beta3"
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)
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// variables which will be used as a store-prefix start with prefix[...].
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// variables which will be used as a store-key start with key[...].
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const (
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keyHighestAvailableCoordinatorIP = "highestAvailableCoordinatorIP"
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keyHighestAvailableNodeIP = "highestAvailableNodeIP"
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keyKubernetesJoinCommand = "kubeJoin"
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keyPeersResourceVersion = "peersResourceVersion"
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keyMasterSecret = "masterSecret"
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keyKubeConfig = "kubeConfig"
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keyClusterID = "clusterID"
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keyKMSData = "KMSData"
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keyKEKID = "kekID"
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prefixFreeCoordinatorIPs = "freeCoordinatorVPNIPs"
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prefixPeerLocation = "peerPrefix"
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prefixFreeNodeIPs = "freeNodeVPNIPs"
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)
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var (
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coordinatorIPRangeStart = netip.AddrFrom4([4]byte{10, 118, 0, 1})
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coordinatorIPRangeEnd = netip.AddrFrom4([4]byte{10, 118, 0, 10})
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nodeIPRangeStart = netip.AddrFrom4([4]byte{10, 118, 0, 11})
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nodeIPRangeEnd = netip.AddrFrom4([4]byte{10, 118, 255, 254})
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)
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// StoreWrapper is a wrapper for the store interface.
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type StoreWrapper struct {
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Store interface {
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Get(string) ([]byte, error)
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Put(string, []byte) error
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Delete(string) error
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Iterator(string) (store.Iterator, error)
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}
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}
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// GetState returns the state from store.
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func (s StoreWrapper) GetState() (state.State, error) {
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rawState, err := s.Store.Get("state")
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if err != nil {
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return 0, err
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}
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currState, err := strconv.Atoi(string(rawState))
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if err != nil {
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return 0, err
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}
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return state.State(currState), nil
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}
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// PutState saves the state to store.
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func (s StoreWrapper) PutState(currState state.State) error {
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rawState := []byte(strconv.Itoa(int(currState)))
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return s.Store.Put("state", rawState)
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}
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// PutPeer puts a single peer in the store, with a unique key derived form the VPNIP.
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func (s StoreWrapper) PutPeer(peer peer.Peer) error {
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if len(peer.VPNIP) == 0 {
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return errors.New("unique ID of peer not set")
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}
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jsonPeer, err := json.Marshal(peer)
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if err != nil {
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return err
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}
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return s.Store.Put(prefixPeerLocation+peer.VPNIP, jsonPeer)
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}
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// RemovePeer removes a peer from the store.
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func (s StoreWrapper) RemovePeer(peer peer.Peer) error {
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return s.Store.Delete(prefixPeerLocation + peer.VPNIP)
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}
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// GetPeers returns all peers in the store.
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func (s StoreWrapper) GetPeers() ([]peer.Peer, error) {
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return s.getPeersByPrefix(prefixPeerLocation)
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}
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// IncrementPeersResourceVersion increments the version of the stored peers.
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// Should be called in a transaction together with Add/Remove operation(s).
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func (s StoreWrapper) IncrementPeersResourceVersion() error {
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val, err := s.GetPeersResourceVersion()
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var unsetErr *store.ValueUnsetError
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if errors.As(err, &unsetErr) {
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val = 0
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} else if err != nil {
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return err
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}
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return s.Store.Put(keyPeersResourceVersion, []byte(strconv.Itoa(val+1)))
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}
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// GetPeersResourceVersion returns the current version of the stored peers.
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func (s StoreWrapper) GetPeersResourceVersion() (int, error) {
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raw, err := s.Store.Get(keyPeersResourceVersion)
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if err != nil {
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return 0, err
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}
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val, err := strconv.Atoi(string(raw))
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if err != nil {
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return 0, err
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}
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return val, nil
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}
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func (s StoreWrapper) getPeersByPrefix(prefix string) ([]peer.Peer, error) {
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peerKeys, err := s.Store.Iterator(prefix)
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if err != nil {
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return nil, err
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}
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var peers []peer.Peer
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for peerKeys.HasNext() {
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storeKey, err := peerKeys.GetNext()
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if err != nil {
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return nil, err
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}
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marshalPeer, err := s.Store.Get(storeKey)
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if err != nil {
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return nil, err
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}
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var peer peer.Peer
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if err := json.Unmarshal(marshalPeer, &peer); err != nil {
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return nil, err
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}
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peers = append(peers, peer)
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}
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return peers, nil
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}
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// GetKubernetesJoinArgs returns the Kubernetes join command from store.
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func (s StoreWrapper) GetKubernetesJoinArgs() (*kubeadm.BootstrapTokenDiscovery, error) {
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rawJoinCommand, err := s.Store.Get(keyKubernetesJoinCommand)
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if err != nil {
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return nil, err
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}
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joinCommand := kubeadm.BootstrapTokenDiscovery{}
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if err := json.Unmarshal(rawJoinCommand, &joinCommand); err != nil {
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return nil, err
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}
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return &joinCommand, nil
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}
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// GetKubernetesConfig returns the Kubernetes kubeconfig file to authenticate with the Kubernetes API.
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func (s StoreWrapper) GetKubernetesConfig() ([]byte, error) {
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return s.Store.Get(keyKubeConfig)
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}
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// PutKubernetesConfig saves the Kubernetes kubeconfig file command to store.
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func (s StoreWrapper) PutKubernetesConfig(kubeConfig []byte) error {
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return s.Store.Put(keyKubeConfig, kubeConfig)
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}
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// GetMasterSecret returns the Constellation master secret from store.
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func (s StoreWrapper) GetMasterSecret() ([]byte, error) {
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return s.Store.Get(keyMasterSecret)
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}
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// PutMasterSecret saves the Constellation master secret to store.
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func (s StoreWrapper) PutMasterSecret(masterSecret []byte) error {
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return s.Store.Put(keyMasterSecret, masterSecret)
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}
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// GetKEKID returns the key encryption key ID from store.
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func (s StoreWrapper) GetKEKID() (string, error) {
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kekID, err := s.Store.Get(keyKEKID)
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return string(kekID), err
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}
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// PutKEKID saves the key encryption key ID to store.
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func (s StoreWrapper) PutKEKID(kekID string) error {
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return s.Store.Put(keyKEKID, []byte(kekID))
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}
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// GetKMSData returns the KMSData from the store.
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func (s StoreWrapper) GetKMSData() (kms.KMSInformation, error) {
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storeData, err := s.Store.Get(keyKMSData)
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if err != nil {
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return kms.KMSInformation{}, err
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}
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data := kms.KMSInformation{}
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if err := json.Unmarshal(storeData, &data); err != nil {
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return kms.KMSInformation{}, err
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}
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return data, nil
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}
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// PutKMSData puts the KMSData in the store.
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func (s StoreWrapper) PutKMSData(kmsInfo kms.KMSInformation) error {
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byteKMSInfo, err := json.Marshal(kmsInfo)
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if err != nil {
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return err
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}
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return s.Store.Put(keyKMSData, byteKMSInfo)
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}
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// GetClusterID returns the unique identifier of the cluster from store.
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func (s StoreWrapper) GetClusterID() ([]byte, error) {
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return s.Store.Get(keyClusterID)
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}
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// PutClusterID saves the unique identifier of the cluster to store.
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func (s StoreWrapper) PutClusterID(clusterID []byte) error {
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return s.Store.Put(keyClusterID, clusterID)
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}
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func (s StoreWrapper) InitializeStoreIPs() error {
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if err := s.PutNextNodeIP(nodeIPRangeStart); err != nil {
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return err
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}
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return s.PutNextCoordinatorIP(coordinatorIPRangeStart)
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}
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// PutNextCoordinatorIP puts the last used ip into the store.
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func (s StoreWrapper) PutNextCoordinatorIP(ip netip.Addr) error {
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return s.Store.Put(keyHighestAvailableCoordinatorIP, ip.AsSlice())
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}
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// getNextCoordinatorIP generates addresses from a /16 subnet.
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func (s StoreWrapper) getNextCoordinatorIP() (netip.Addr, error) {
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byteIP, err := s.Store.Get(keyHighestAvailableCoordinatorIP)
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if err != nil {
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return netip.Addr{}, errors.New("could not obtain IP from store")
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}
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ip, ok := netip.AddrFromSlice(byteIP)
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if !ok {
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return netip.Addr{}, fmt.Errorf("ip addr malformed %v", byteIP)
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}
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if !ip.IsValid() || ip.Compare(coordinatorIPRangeEnd) == 1 {
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return netip.Addr{}, errors.New("no ips left to assign")
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}
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nextIP := ip.Next()
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if err := s.PutNextCoordinatorIP(nextIP); err != nil {
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return netip.Addr{}, errors.New("could not put IP to store")
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}
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return ip, nil
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}
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// PopNextFreeCoordinatorIP return the next free IP, these could be a old one from a removed peer
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// or a newly generated IP.
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func (s StoreWrapper) PopNextFreeCoordinatorIP() (netip.Addr, error) {
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vpnIP, err := s.getFreedVPNIP(prefixFreeCoordinatorIPs)
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var noElementsError *store.NoElementsLeftError
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if errors.As(err, &noElementsError) {
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return s.getNextCoordinatorIP()
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}
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if err != nil {
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return netip.Addr{}, err
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}
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return vpnIP, nil
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}
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// PutFreedCoordinatorVPNIP puts a already generated VPNIP (IP < highestAvailableCoordinatorIP ),
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// which is currently unused, into the store.
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// The IP is saved at a specific prefix and will be used with priority when we
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// request a new Coordinator IP.
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func (s StoreWrapper) PutFreedCoordinatorVPNIP(vpnIP string) error {
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return s.Store.Put(prefixFreeCoordinatorIPs+vpnIP, nil)
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}
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// PutNextNodeIP puts the last used ip into the store.
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func (s StoreWrapper) PutNextNodeIP(ip netip.Addr) error {
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return s.Store.Put(keyHighestAvailableNodeIP, ip.AsSlice())
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}
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// getNextNodeIP generates addresses from a /16 subnet.
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func (s StoreWrapper) getNextNodeIP() (netip.Addr, error) {
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byteIP, err := s.Store.Get(keyHighestAvailableNodeIP)
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if err != nil {
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return netip.Addr{}, errors.New("could not obtain IP from store")
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}
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ip, ok := netip.AddrFromSlice(byteIP)
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if !ok {
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return netip.Addr{}, fmt.Errorf("ip addr malformed %v", byteIP)
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}
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if !ip.IsValid() || ip.Compare(nodeIPRangeEnd) == 1 {
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return netip.Addr{}, errors.New("no ips left to assign")
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}
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nextIP := ip.Next()
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if err := s.PutNextNodeIP(nextIP); err != nil {
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return netip.Addr{}, errors.New("could not put IP to store")
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}
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return ip, nil
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}
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// PopNextFreeNodeIP return the next free IP, these could be a old one from a removed peer
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// or a newly generated IP.
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func (s StoreWrapper) PopNextFreeNodeIP() (netip.Addr, error) {
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vpnIP, err := s.getFreedVPNIP(prefixFreeNodeIPs)
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var noElementsError *store.NoElementsLeftError
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if errors.As(err, &noElementsError) {
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return s.getNextNodeIP()
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}
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if err != nil {
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return netip.Addr{}, err
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}
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return vpnIP, nil
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}
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// PutFreedNodeVPNIP puts a already generated VPNIP (IP < highestAvailableNodeIP ),
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// which is currently unused, into the store.
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// The IP is saved at a specific prefix and will be used with priority when we
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// request a new Node IP.
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func (s StoreWrapper) PutFreedNodeVPNIP(vpnIP string) error {
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return s.Store.Put(prefixFreeNodeIPs+vpnIP, nil)
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}
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// getFreedVPNIP reclaims a VPNIP from the store and removes it from there.
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func (s StoreWrapper) getFreedVPNIP(prefix string) (netip.Addr, error) {
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iter, err := s.Store.Iterator(prefix)
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if err != nil {
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return netip.Addr{}, err
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}
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vpnIPWithPrefix, err := iter.GetNext()
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if err != nil {
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return netip.Addr{}, err
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}
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stringVPNIP := strings.TrimPrefix(vpnIPWithPrefix, prefix)
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vpnIP, err := netip.ParseAddr(stringVPNIP)
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if err != nil {
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return netip.Addr{}, fmt.Errorf("ip addr malformed %v, %w", stringVPNIP, err)
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}
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return vpnIP, s.Store.Delete(vpnIPWithPrefix)
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}
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