This commit entirely replaces NAT in Kilo with a few iproute2 rules. Previously, Kilo would source-NAT the majority of packets in order to avoid problems with strict source checks in cloud providers causing packets to be considered martians. This source-NAT-ing made it difficult to correctly apply Kuberenetes NetworkPolicies based on source IPs. This rewrite instead relies on a handful of iproute2 rules to ensure that packets get encapsulated in certain scenarios based on the source network and/or source interface. This has the benefit of avoiding extra iptables bloat as well as enabling better compatibility with NetworkPolicies. Signed-off-by: Lucas Servén Marín <lserven@gmail.com>
818 lines
23 KiB
Go
818 lines
23 KiB
Go
// Copyright 2019 the Kilo authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package mesh
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"net"
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"os"
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"sync"
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"time"
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"github.com/go-kit/kit/log"
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"github.com/go-kit/kit/log/level"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/vishvananda/netlink"
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"github.com/squat/kilo/pkg/encapsulation"
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"github.com/squat/kilo/pkg/iproute"
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"github.com/squat/kilo/pkg/iptables"
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"github.com/squat/kilo/pkg/route"
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"github.com/squat/kilo/pkg/wireguard"
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)
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const resyncPeriod = 30 * time.Second
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const (
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// KiloPath is the directory where Kilo stores its configuration.
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KiloPath = "/var/lib/kilo"
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// PrivateKeyPath is the filepath where the WireGuard private key is stored.
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PrivateKeyPath = KiloPath + "/key"
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// ConfPath is the filepath where the WireGuard configuration is stored.
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ConfPath = KiloPath + "/conf"
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// DefaultKiloInterface is the default iterface created and used by Kilo.
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DefaultKiloInterface = "kilo0"
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// DefaultKiloPort is the default UDP port Kilo uses.
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DefaultKiloPort = 51820
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// DefaultCNIPath is the default path to the CNI config file.
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DefaultCNIPath = "/etc/cni/net.d/10-kilo.conflist"
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)
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// DefaultKiloSubnet is the default CIDR for Kilo.
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var DefaultKiloSubnet = &net.IPNet{IP: []byte{10, 4, 0, 0}, Mask: []byte{255, 255, 0, 0}}
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// Granularity represents the abstraction level at which the network
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// should be meshed.
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type Granularity string
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const (
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// LogicalGranularity indicates that the network should create
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// a mesh between logical locations, e.g. data-centers, but not between
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// all nodes within a single location.
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LogicalGranularity Granularity = "location"
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// FullGranularity indicates that the network should create
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// a mesh between every node.
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FullGranularity Granularity = "full"
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)
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// Node represents a node in the network.
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type Node struct {
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ExternalIP *net.IPNet
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Key []byte
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InternalIP *net.IPNet
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// LastSeen is a Unix time for the last time
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// the node confirmed it was live.
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LastSeen int64
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// Leader is a suggestion to Kilo that
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// the node wants to lead its segment.
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Leader bool
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Location string
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Name string
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PersistentKeepalive int
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Subnet *net.IPNet
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WireGuardIP *net.IPNet
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}
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// Ready indicates whether or not the node is ready.
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func (n *Node) Ready() bool {
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// Nodes that are not leaders will not have WireGuardIPs, so it is not required.
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return n != nil && n.ExternalIP != nil && n.Key != nil && n.InternalIP != nil && n.Subnet != nil && time.Now().Unix()-n.LastSeen < int64(resyncPeriod)*2/int64(time.Second)
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}
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// Peer represents a peer in the network.
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type Peer struct {
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wireguard.Peer
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Name string
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}
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// Ready indicates whether or not the peer is ready.
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func (p *Peer) Ready() bool {
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return p != nil && p.AllowedIPs != nil && len(p.AllowedIPs) != 0 && p.PublicKey != nil
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}
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// EventType describes what kind of an action an event represents.
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type EventType string
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const (
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// AddEvent represents an action where an item was added.
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AddEvent EventType = "add"
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// DeleteEvent represents an action where an item was removed.
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DeleteEvent EventType = "delete"
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// UpdateEvent represents an action where an item was updated.
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UpdateEvent EventType = "update"
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)
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// NodeEvent represents an event concerning a node in the cluster.
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type NodeEvent struct {
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Type EventType
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Node *Node
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Old *Node
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}
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// PeerEvent represents an event concerning a peer in the cluster.
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type PeerEvent struct {
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Type EventType
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Peer *Peer
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Old *Peer
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}
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// Backend can create clients for all of the
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// primitive types that Kilo deals with, namely:
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// * nodes; and
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// * peers.
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type Backend interface {
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Nodes() NodeBackend
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Peers() PeerBackend
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}
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// NodeBackend can get nodes by name, init itself,
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// list the nodes that should be meshed,
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// set Kilo properties for a node,
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// clean up any changes applied to the backend,
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// and watch for changes to nodes.
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type NodeBackend interface {
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CleanUp(string) error
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Get(string) (*Node, error)
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Init(<-chan struct{}) error
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List() ([]*Node, error)
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Set(string, *Node) error
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Watch() <-chan *NodeEvent
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}
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// PeerBackend can get peers by name, init itself,
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// list the peers that should be in the mesh,
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// set fields for a peer,
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// clean up any changes applied to the backend,
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// and watch for changes to peers.
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type PeerBackend interface {
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CleanUp(string) error
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Get(string) (*Peer, error)
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Init(<-chan struct{}) error
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List() ([]*Peer, error)
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Set(string, *Peer) error
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Watch() <-chan *PeerEvent
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}
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// Mesh is able to create Kilo network meshes.
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type Mesh struct {
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Backend
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cleanUpIface bool
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cni bool
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cniPath string
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enc encapsulation.Encapsulator
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externalIP *net.IPNet
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granularity Granularity
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hostname string
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internalIP *net.IPNet
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ipTables *iptables.Controller
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kiloIface int
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key []byte
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local bool
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port uint32
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priv []byte
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privIface int
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pub []byte
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pubIface int
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stop chan struct{}
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subnet *net.IPNet
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table *route.Table
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wireGuardIP *net.IPNet
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// nodes and peers are mutable fields in the struct
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// and needs to be guarded.
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nodes map[string]*Node
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peers map[string]*Peer
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mu sync.Mutex
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errorCounter *prometheus.CounterVec
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nodesGuage prometheus.Gauge
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peersGuage prometheus.Gauge
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reconcileCounter prometheus.Counter
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logger log.Logger
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}
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// New returns a new Mesh instance.
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func New(backend Backend, enc encapsulation.Encapsulator, granularity Granularity, hostname string, port uint32, subnet *net.IPNet, local, cni bool, cniPath, iface string, cleanUpIface bool, logger log.Logger) (*Mesh, error) {
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if err := os.MkdirAll(KiloPath, 0700); err != nil {
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return nil, fmt.Errorf("failed to create directory to store configuration: %v", err)
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}
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private, err := ioutil.ReadFile(PrivateKeyPath)
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private = bytes.Trim(private, "\n")
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if err != nil {
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level.Warn(logger).Log("msg", "no private key found on disk; generating one now")
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if private, err = wireguard.GenKey(); err != nil {
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return nil, err
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}
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}
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public, err := wireguard.PubKey(private)
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if err != nil {
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return nil, err
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}
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if err := ioutil.WriteFile(PrivateKeyPath, private, 0600); err != nil {
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return nil, fmt.Errorf("failed to write private key to disk: %v", err)
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}
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cniIndex, err := cniDeviceIndex()
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if err != nil {
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return nil, fmt.Errorf("failed to query netlink for CNI device: %v", err)
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}
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privateIP, publicIP, err := getIP(hostname, enc.Index(), cniIndex)
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if err != nil {
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return nil, fmt.Errorf("failed to find public IP: %v", err)
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}
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ifaces, err := interfacesForIP(privateIP)
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if err != nil {
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return nil, fmt.Errorf("failed to find interface for private IP: %v", err)
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}
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privIface := ifaces[0].Index
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ifaces, err = interfacesForIP(publicIP)
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if err != nil {
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return nil, fmt.Errorf("failed to find interface for public IP: %v", err)
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}
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pubIface := ifaces[0].Index
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kiloIface, _, err := wireguard.New(iface)
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if err != nil {
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return nil, fmt.Errorf("failed to create WireGuard interface: %v", err)
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}
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if enc.Strategy() != encapsulation.Never {
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if err := enc.Init(privIface); err != nil {
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return nil, fmt.Errorf("failed to initialize encapsulator: %v", err)
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}
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}
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level.Debug(logger).Log("msg", fmt.Sprintf("using %s as the private IP address", privateIP.String()))
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level.Debug(logger).Log("msg", fmt.Sprintf("using %s as the public IP address", publicIP.String()))
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ipTables, err := iptables.New(len(subnet.IP))
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if err != nil {
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return nil, fmt.Errorf("failed to IP tables controller: %v", err)
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}
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return &Mesh{
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Backend: backend,
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cleanUpIface: cleanUpIface,
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cni: cni,
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cniPath: cniPath,
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enc: enc,
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externalIP: publicIP,
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granularity: granularity,
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hostname: hostname,
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internalIP: privateIP,
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ipTables: ipTables,
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kiloIface: kiloIface,
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nodes: make(map[string]*Node),
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peers: make(map[string]*Peer),
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port: port,
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priv: private,
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privIface: privIface,
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pub: public,
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pubIface: pubIface,
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local: local,
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stop: make(chan struct{}),
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subnet: subnet,
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table: route.NewTable(),
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errorCounter: prometheus.NewCounterVec(prometheus.CounterOpts{
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Name: "kilo_errors_total",
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Help: "Number of errors that occurred while administering the mesh.",
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}, []string{"event"}),
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nodesGuage: prometheus.NewGauge(prometheus.GaugeOpts{
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Name: "kilo_nodes",
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Help: "Number of nodes in the mesh.",
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}),
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peersGuage: prometheus.NewGauge(prometheus.GaugeOpts{
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Name: "kilo_peers",
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Help: "Number of peers in the mesh.",
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}),
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reconcileCounter: prometheus.NewCounter(prometheus.CounterOpts{
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Name: "kilo_reconciles_total",
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Help: "Number of reconciliation attempts.",
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}),
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logger: logger,
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}, nil
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}
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// Run starts the mesh.
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func (m *Mesh) Run() error {
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if err := m.Nodes().Init(m.stop); err != nil {
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return fmt.Errorf("failed to initialize node backend: %v", err)
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}
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// Try to set the CNI config quickly.
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if n, err := m.Nodes().Get(m.hostname); err == nil {
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if n != nil && n.Subnet != nil {
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m.nodes[m.hostname] = n
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m.updateCNIConfig()
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}
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}
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if err := m.Peers().Init(m.stop); err != nil {
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return fmt.Errorf("failed to initialize peer backend: %v", err)
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}
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ipTablesErrors, err := m.ipTables.Run(m.stop)
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if err != nil {
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return fmt.Errorf("failed to watch for IP tables updates: %v", err)
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}
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routeErrors, err := m.table.Run(m.stop)
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if err != nil {
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return fmt.Errorf("failed to watch for route table updates: %v", err)
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}
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go func() {
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for {
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var err error
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select {
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case err = <-ipTablesErrors:
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case err = <-routeErrors:
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case <-m.stop:
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return
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}
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if err != nil {
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level.Error(m.logger).Log("error", err)
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m.errorCounter.WithLabelValues("run").Inc()
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}
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}
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}()
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defer m.cleanUp()
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t := time.NewTimer(resyncPeriod)
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nw := m.Nodes().Watch()
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pw := m.Peers().Watch()
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var ne *NodeEvent
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var pe *PeerEvent
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for {
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select {
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case ne = <-nw:
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m.syncNodes(ne)
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case pe = <-pw:
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m.syncPeers(pe)
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case <-t.C:
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m.checkIn()
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if m.cni {
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m.updateCNIConfig()
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}
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m.syncEndpoints()
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m.applyTopology()
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t.Reset(resyncPeriod)
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case <-m.stop:
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return nil
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}
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}
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}
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// WireGuard updates the endpoints of peers to match the
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// last place a valid packet was received from.
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// Periodically we need to syncronize the endpoints
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// of peers in the backend to match the WireGuard configuration.
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func (m *Mesh) syncEndpoints() {
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link, err := linkByIndex(m.kiloIface)
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if err != nil {
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level.Error(m.logger).Log("error", err)
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m.errorCounter.WithLabelValues("endpoints").Inc()
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return
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}
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conf, err := wireguard.ShowConf(link.Attrs().Name)
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if err != nil {
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level.Error(m.logger).Log("error", err)
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m.errorCounter.WithLabelValues("endpoints").Inc()
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return
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}
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m.mu.Lock()
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defer m.mu.Unlock()
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c := wireguard.Parse(conf)
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var key string
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var tmp *Peer
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for i := range c.Peers {
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// Peers are indexed by public key.
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key = string(c.Peers[i].PublicKey)
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if p, ok := m.peers[key]; ok {
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tmp = &Peer{
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Name: p.Name,
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Peer: *c.Peers[i],
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}
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if !peersAreEqual(tmp, p) {
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p.Endpoint = tmp.Endpoint
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if err := m.Peers().Set(p.Name, p); err != nil {
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level.Error(m.logger).Log("error", err)
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m.errorCounter.WithLabelValues("endpoints").Inc()
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}
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}
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}
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}
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}
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func (m *Mesh) syncNodes(e *NodeEvent) {
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logger := log.With(m.logger, "event", e.Type)
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level.Debug(logger).Log("msg", "syncing nodes", "event", e.Type)
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if isSelf(m.hostname, e.Node) {
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level.Debug(logger).Log("msg", "processing local node", "node", e.Node)
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m.handleLocal(e.Node)
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return
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}
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var diff bool
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m.mu.Lock()
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if !e.Node.Ready() {
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level.Debug(logger).Log("msg", "received incomplete node", "node", e.Node)
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// An existing node is no longer valid
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// so remove it from the mesh.
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if _, ok := m.nodes[e.Node.Name]; ok {
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level.Info(logger).Log("msg", "node is no longer ready", "node", e.Node)
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diff = true
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}
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} else {
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switch e.Type {
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case AddEvent:
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fallthrough
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case UpdateEvent:
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if !nodesAreEqual(m.nodes[e.Node.Name], e.Node) {
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diff = true
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}
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// Even if the nodes are the same,
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// overwrite the old node to update the timestamp.
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m.nodes[e.Node.Name] = e.Node
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case DeleteEvent:
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delete(m.nodes, e.Node.Name)
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diff = true
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}
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}
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m.mu.Unlock()
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if diff {
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level.Info(logger).Log("node", e.Node)
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m.applyTopology()
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}
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}
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func (m *Mesh) syncPeers(e *PeerEvent) {
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logger := log.With(m.logger, "event", e.Type)
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level.Debug(logger).Log("msg", "syncing peers", "event", e.Type)
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var diff bool
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m.mu.Lock()
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// Peers are indexed by public key.
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key := string(e.Peer.PublicKey)
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if !e.Peer.Ready() {
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level.Debug(logger).Log("msg", "received incomplete peer", "peer", e.Peer)
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// An existing peer is no longer valid
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// so remove it from the mesh.
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if _, ok := m.peers[key]; ok {
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level.Info(logger).Log("msg", "peer is no longer ready", "peer", e.Peer)
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diff = true
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}
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} else {
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switch e.Type {
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case AddEvent:
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fallthrough
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case UpdateEvent:
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if e.Old != nil && key != string(e.Old.PublicKey) {
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delete(m.peers, string(e.Old.PublicKey))
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diff = true
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}
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if !peersAreEqual(m.peers[key], e.Peer) {
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m.peers[key] = e.Peer
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diff = true
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}
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case DeleteEvent:
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delete(m.peers, key)
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diff = true
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}
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}
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m.mu.Unlock()
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if diff {
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level.Info(logger).Log("peer", e.Peer)
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m.applyTopology()
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}
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}
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// checkIn will try to update the local node's LastSeen timestamp
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// in the backend.
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func (m *Mesh) checkIn() {
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m.mu.Lock()
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defer m.mu.Unlock()
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n := m.nodes[m.hostname]
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if n == nil {
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level.Debug(m.logger).Log("msg", "no local node found in backend")
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return
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}
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oldTime := n.LastSeen
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n.LastSeen = time.Now().Unix()
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if err := m.Nodes().Set(m.hostname, n); err != nil {
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level.Error(m.logger).Log("error", fmt.Sprintf("failed to set local node: %v", err), "node", n)
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m.errorCounter.WithLabelValues("checkin").Inc()
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// Revert time.
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n.LastSeen = oldTime
|
|
return
|
|
}
|
|
level.Debug(m.logger).Log("msg", "successfully checked in local node in backend")
|
|
}
|
|
|
|
func (m *Mesh) handleLocal(n *Node) {
|
|
// Allow the IPs to be overridden.
|
|
if n.ExternalIP == nil {
|
|
n.ExternalIP = m.externalIP
|
|
}
|
|
if n.InternalIP == nil {
|
|
n.InternalIP = m.internalIP
|
|
}
|
|
// Compare the given node to the calculated local node.
|
|
// Take leader, location, and subnet from the argument, as these
|
|
// are not determined by kilo.
|
|
local := &Node{
|
|
ExternalIP: n.ExternalIP,
|
|
Key: m.pub,
|
|
InternalIP: n.InternalIP,
|
|
LastSeen: time.Now().Unix(),
|
|
Leader: n.Leader,
|
|
Location: n.Location,
|
|
Name: m.hostname,
|
|
Subnet: n.Subnet,
|
|
WireGuardIP: m.wireGuardIP,
|
|
}
|
|
if !nodesAreEqual(n, local) {
|
|
level.Debug(m.logger).Log("msg", "local node differs from backend")
|
|
if err := m.Nodes().Set(m.hostname, local); err != nil {
|
|
level.Error(m.logger).Log("error", fmt.Sprintf("failed to set local node: %v", err), "node", local)
|
|
m.errorCounter.WithLabelValues("local").Inc()
|
|
return
|
|
}
|
|
level.Debug(m.logger).Log("msg", "successfully reconciled local node against backend")
|
|
}
|
|
m.mu.Lock()
|
|
|
|
n = m.nodes[m.hostname]
|
|
if n == nil {
|
|
n = &Node{}
|
|
}
|
|
m.mu.Unlock()
|
|
if !nodesAreEqual(n, local) {
|
|
m.mu.Lock()
|
|
m.nodes[local.Name] = local
|
|
m.mu.Unlock()
|
|
m.applyTopology()
|
|
}
|
|
}
|
|
|
|
func (m *Mesh) applyTopology() {
|
|
m.reconcileCounter.Inc()
|
|
m.mu.Lock()
|
|
defer m.mu.Unlock()
|
|
// Ensure only ready nodes are considered.
|
|
nodes := make(map[string]*Node)
|
|
var readyNodes float64
|
|
for k := range m.nodes {
|
|
if !m.nodes[k].Ready() {
|
|
continue
|
|
}
|
|
nodes[k] = m.nodes[k]
|
|
readyNodes++
|
|
}
|
|
// Ensure only ready nodes are considered.
|
|
peers := make(map[string]*Peer)
|
|
var readyPeers float64
|
|
for k := range m.peers {
|
|
if !m.peers[k].Ready() {
|
|
continue
|
|
}
|
|
peers[k] = m.peers[k]
|
|
readyPeers++
|
|
}
|
|
m.nodesGuage.Set(readyNodes)
|
|
m.peersGuage.Set(readyPeers)
|
|
// We cannot do anything with the topology until the local node is available.
|
|
if nodes[m.hostname] == nil {
|
|
return
|
|
}
|
|
t, err := NewTopology(nodes, peers, m.granularity, m.hostname, m.port, m.priv, m.subnet)
|
|
if err != nil {
|
|
level.Error(m.logger).Log("error", err)
|
|
m.errorCounter.WithLabelValues("apply").Inc()
|
|
return
|
|
}
|
|
// Update the node's WireGuard IP.
|
|
m.wireGuardIP = t.wireGuardCIDR
|
|
conf := t.Conf()
|
|
buf, err := conf.Bytes()
|
|
if err != nil {
|
|
level.Error(m.logger).Log("error", err)
|
|
m.errorCounter.WithLabelValues("apply").Inc()
|
|
}
|
|
if err := ioutil.WriteFile(ConfPath, buf, 0600); err != nil {
|
|
level.Error(m.logger).Log("error", err)
|
|
m.errorCounter.WithLabelValues("apply").Inc()
|
|
return
|
|
}
|
|
ipRules := iptables.ForwardRules(m.subnet)
|
|
// If we are handling local routes, ensure the local
|
|
// tunnel has an IP address and IPIP traffic is allowed.
|
|
if m.enc.Strategy() != encapsulation.Never && m.local {
|
|
var cidrs []*net.IPNet
|
|
for _, s := range t.segments {
|
|
if s.location == nodes[m.hostname].Location {
|
|
for i := range s.privateIPs {
|
|
cidrs = append(cidrs, oneAddressCIDR(s.privateIPs[i]))
|
|
}
|
|
break
|
|
}
|
|
}
|
|
ipRules = append(ipRules, m.enc.Rules(cidrs)...)
|
|
|
|
// If we are handling local routes, ensure the local
|
|
// tunnel has an IP address.
|
|
if err := m.enc.Set(oneAddressCIDR(newAllocator(*nodes[m.hostname].Subnet).next().IP)); err != nil {
|
|
level.Error(m.logger).Log("error", err)
|
|
m.errorCounter.WithLabelValues("apply").Inc()
|
|
return
|
|
}
|
|
}
|
|
if err := m.ipTables.Set(ipRules); err != nil {
|
|
level.Error(m.logger).Log("error", err)
|
|
m.errorCounter.WithLabelValues("apply").Inc()
|
|
return
|
|
}
|
|
// Find the Kilo interface name.
|
|
link, err := linkByIndex(m.kiloIface)
|
|
if err != nil {
|
|
level.Error(m.logger).Log("error", err)
|
|
m.errorCounter.WithLabelValues("apply").Inc()
|
|
return
|
|
}
|
|
if t.leader {
|
|
if err := iproute.SetAddress(m.kiloIface, t.wireGuardCIDR); err != nil {
|
|
level.Error(m.logger).Log("error", err)
|
|
m.errorCounter.WithLabelValues("apply").Inc()
|
|
return
|
|
}
|
|
oldConf, err := wireguard.ShowConf(link.Attrs().Name)
|
|
if err != nil {
|
|
level.Error(m.logger).Log("error", err)
|
|
m.errorCounter.WithLabelValues("apply").Inc()
|
|
return
|
|
}
|
|
// Setting the WireGuard configuration interrupts existing connections
|
|
// so only set the configuration if it has changed.
|
|
equal := conf.Equal(wireguard.Parse(oldConf))
|
|
if !equal {
|
|
level.Info(m.logger).Log("msg", "WireGuard configurations are different")
|
|
if err := wireguard.SetConf(link.Attrs().Name, ConfPath); err != nil {
|
|
level.Error(m.logger).Log("error", err)
|
|
m.errorCounter.WithLabelValues("apply").Inc()
|
|
return
|
|
}
|
|
}
|
|
if err := iproute.Set(m.kiloIface, true); err != nil {
|
|
level.Error(m.logger).Log("error", err)
|
|
m.errorCounter.WithLabelValues("apply").Inc()
|
|
return
|
|
}
|
|
} else {
|
|
level.Debug(m.logger).Log("msg", "local node is not the leader")
|
|
if err := iproute.Set(m.kiloIface, false); err != nil {
|
|
level.Error(m.logger).Log("error", err)
|
|
m.errorCounter.WithLabelValues("apply").Inc()
|
|
return
|
|
}
|
|
}
|
|
// We need to add routes last since they may depend
|
|
// on the WireGuard interface.
|
|
routes, rules := t.Routes(link.Attrs().Name, m.kiloIface, m.privIface, m.enc.Index(), m.local, m.enc)
|
|
if err := m.table.Set(routes, rules); err != nil {
|
|
level.Error(m.logger).Log("error", err)
|
|
m.errorCounter.WithLabelValues("apply").Inc()
|
|
}
|
|
}
|
|
|
|
// RegisterMetrics registers Prometheus metrics on the given Prometheus
|
|
// registerer.
|
|
func (m *Mesh) RegisterMetrics(r prometheus.Registerer) {
|
|
r.MustRegister(
|
|
m.errorCounter,
|
|
m.nodesGuage,
|
|
m.peersGuage,
|
|
m.reconcileCounter,
|
|
)
|
|
}
|
|
|
|
// Stop stops the mesh.
|
|
func (m *Mesh) Stop() {
|
|
close(m.stop)
|
|
}
|
|
|
|
func (m *Mesh) cleanUp() {
|
|
if err := m.ipTables.CleanUp(); err != nil {
|
|
level.Error(m.logger).Log("error", fmt.Sprintf("failed to clean up IP tables: %v", err))
|
|
m.errorCounter.WithLabelValues("cleanUp").Inc()
|
|
}
|
|
if err := m.table.CleanUp(); err != nil {
|
|
level.Error(m.logger).Log("error", fmt.Sprintf("failed to clean up routes: %v", err))
|
|
m.errorCounter.WithLabelValues("cleanUp").Inc()
|
|
}
|
|
if err := os.Remove(ConfPath); err != nil {
|
|
level.Error(m.logger).Log("error", fmt.Sprintf("failed to delete configuration file: %v", err))
|
|
m.errorCounter.WithLabelValues("cleanUp").Inc()
|
|
}
|
|
if m.cleanUpIface {
|
|
if err := iproute.RemoveInterface(m.kiloIface); err != nil {
|
|
level.Error(m.logger).Log("error", fmt.Sprintf("failed to remove WireGuard interface: %v", err))
|
|
m.errorCounter.WithLabelValues("cleanUp").Inc()
|
|
}
|
|
}
|
|
if err := m.Nodes().CleanUp(m.hostname); err != nil {
|
|
level.Error(m.logger).Log("error", fmt.Sprintf("failed to clean up node backend: %v", err))
|
|
m.errorCounter.WithLabelValues("cleanUp").Inc()
|
|
}
|
|
if err := m.Peers().CleanUp(m.hostname); err != nil {
|
|
level.Error(m.logger).Log("error", fmt.Sprintf("failed to clean up peer backend: %v", err))
|
|
m.errorCounter.WithLabelValues("cleanUp").Inc()
|
|
}
|
|
if err := m.enc.CleanUp(); err != nil {
|
|
level.Error(m.logger).Log("error", fmt.Sprintf("failed to clean up encapsulator: %v", err))
|
|
m.errorCounter.WithLabelValues("cleanUp").Inc()
|
|
}
|
|
}
|
|
|
|
func isSelf(hostname string, node *Node) bool {
|
|
return node != nil && node.Name == hostname
|
|
}
|
|
|
|
func nodesAreEqual(a, b *Node) bool {
|
|
if !(a != nil) == (b != nil) {
|
|
return false
|
|
}
|
|
if a == b {
|
|
return true
|
|
}
|
|
// Ignore LastSeen when comparing equality we want to check if the nodes are
|
|
// equivalent. However, we do want to check if LastSeen has transitioned
|
|
// between valid and invalid.
|
|
return ipNetsEqual(a.ExternalIP, b.ExternalIP) && string(a.Key) == string(b.Key) && ipNetsEqual(a.WireGuardIP, b.WireGuardIP) && ipNetsEqual(a.InternalIP, b.InternalIP) && a.Leader == b.Leader && a.Location == b.Location && a.Name == b.Name && subnetsEqual(a.Subnet, b.Subnet) && a.Ready() == b.Ready()
|
|
}
|
|
|
|
func peersAreEqual(a, b *Peer) bool {
|
|
if !(a != nil) == (b != nil) {
|
|
return false
|
|
}
|
|
if a == b {
|
|
return true
|
|
}
|
|
if !(a.Endpoint != nil) == (b.Endpoint != nil) {
|
|
return false
|
|
}
|
|
if a.Endpoint != nil {
|
|
if !a.Endpoint.IP.Equal(b.Endpoint.IP) || a.Endpoint.Port != b.Endpoint.Port {
|
|
return false
|
|
}
|
|
}
|
|
if len(a.AllowedIPs) != len(b.AllowedIPs) {
|
|
return false
|
|
}
|
|
for i := range a.AllowedIPs {
|
|
if !ipNetsEqual(a.AllowedIPs[i], b.AllowedIPs[i]) {
|
|
return false
|
|
}
|
|
}
|
|
return string(a.PublicKey) == string(b.PublicKey) && a.PersistentKeepalive == b.PersistentKeepalive
|
|
}
|
|
|
|
func ipNetsEqual(a, b *net.IPNet) bool {
|
|
if a == nil && b == nil {
|
|
return true
|
|
}
|
|
if (a != nil) != (b != nil) {
|
|
return false
|
|
}
|
|
if a.Mask.String() != b.Mask.String() {
|
|
return false
|
|
}
|
|
return a.IP.Equal(b.IP)
|
|
}
|
|
|
|
func subnetsEqual(a, b *net.IPNet) bool {
|
|
if a == nil && b == nil {
|
|
return true
|
|
}
|
|
if (a != nil) != (b != nil) {
|
|
return false
|
|
}
|
|
if a.Mask.String() != b.Mask.String() {
|
|
return false
|
|
}
|
|
if !a.Contains(b.IP) {
|
|
return false
|
|
}
|
|
if !b.Contains(a.IP) {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
func linkByIndex(index int) (netlink.Link, error) {
|
|
link, err := netlink.LinkByIndex(index)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to get interface: %v", err)
|
|
}
|
|
return link, nil
|
|
}
|