cluster: migrate to using pkg/rings for Addresses [WIP]

Signed-off-by: Alejandro Mery <amery@jpi.io>
This commit is contained in:
2024-06-03 14:28:38 +00:00
parent 0409cc5e66
commit 9aee20f36f
14 changed files with 216 additions and 163 deletions
+44 -95
View File
@@ -5,13 +5,13 @@ import (
"io/fs"
"net/netip"
"darvaza.org/core"
"git.jpi.io/amery/jpictl/pkg/rings"
"git.jpi.io/amery/jpictl/pkg/wireguard"
)
const (
// RingsCount indicates how many wireguard rings we have
RingsCount = 2
// RingZeroPort is the port wireguard uses for ring0
RingZeroPort = 51800
// RingOnePort is the port wireguard uses for ring1
@@ -21,7 +21,7 @@ const (
// RingInfo contains represents the Wireguard endpoint details
// for a Machine on a particular ring
type RingInfo struct {
Ring int
Ring rings.RingID
Enabled bool
Keys wireguard.KeyPair
}
@@ -51,7 +51,7 @@ func (ri *RingInfo) unsafeMerge(alter *RingInfo) error {
ri.Enabled = true
}
// fill the gaps on our keypair
// fill the gaps on our key pair
if ri.Keys.PrivateKey.IsZero() {
ri.Keys.PrivateKey = alter.Keys.PrivateKey
}
@@ -76,100 +76,34 @@ func canMergeKeyPairs(p1, p2 wireguard.KeyPair) bool {
// RingAddressEncoder provides encoder/decoder access for a particular
// Wireguard ring
type RingAddressEncoder struct {
ID int
ID rings.RingID
Port uint16
Encode func(zoneID rings.ZoneID, nodeID rings.NodeID) (netip.Addr, bool)
Decode func(addr netip.Addr) (zoneID rings.ZoneID, nodeID rings.NodeID, ok bool)
Encode func(rings.RegionID, rings.ZoneID, rings.NodeID) (netip.Addr, error)
Decode func(addr netip.Addr) (rings.RegionID, rings.ZoneID, rings.NodeID, bool)
}
var (
// RingZero is a wg0 address encoder/decoder
RingZero = RingAddressEncoder{
ID: 0,
ID: rings.RingZeroID,
Port: RingZeroPort,
Decode: ParseRingZeroAddress,
Encode: RingZeroAddress,
Decode: rings.DecodeRingZeroAddress,
Encode: rings.RingZeroAddress,
}
// RingOne is a wg1 address encoder/decoder
RingOne = RingAddressEncoder{
ID: 1,
ID: rings.RingOneID,
Port: RingOnePort,
Decode: ParseRingOneAddress,
Encode: RingOneAddress,
Decode: rings.DecodeRingOneAddress,
Encode: rings.RingOneAddress,
}
// Rings provides indexed access to the ring address encoders
Rings = [RingsCount]RingAddressEncoder{
Rings = []RingAddressEncoder{
RingZero,
RingOne,
}
)
// ValidZoneID checks if the given zoneID is a valid 4 bit zone number.
//
// 0 is reserved, and only allowed when composing CIDRs.
func ValidZoneID(zoneID rings.ZoneID) bool {
return zoneID == 0 || zoneID.Valid()
}
// ValidNodeID checks if the given nodeID is a valid 8 bit number.
// nodeID is unique within a Zone.
// 0 is reserved, and only allowed when composing CIDRs.
func ValidNodeID(nodeID rings.NodeID) bool {
return nodeID == 0 || nodeID.Valid()
}
// ParseRingZeroAddress extracts zone and node ID from a wg0 [netip.Addr]
// wg0 addresses are of the form `10.0.{{zoneID}}.{{nodeID}}`
func ParseRingZeroAddress(addr netip.Addr) (zoneID rings.ZoneID, nodeID rings.NodeID, ok bool) {
if addr.IsValid() {
a4 := addr.As4()
if a4[0] == 10 && a4[1] == 0 {
zoneID = rings.ZoneID(a4[2])
nodeID = rings.NodeID(a4[3])
return zoneID, nodeID, true
}
}
return 0, 0, false
}
// RingZeroAddress returns a wg0 IP address
func RingZeroAddress(zoneID rings.ZoneID, nodeID rings.NodeID) (netip.Addr, bool) {
switch {
case !ValidZoneID(zoneID) || !ValidNodeID(nodeID):
return netip.Addr{}, false
default:
a4 := [4]uint8{10, 0, uint8(zoneID), uint8(nodeID)}
return netip.AddrFrom4(a4), true
}
}
// ParseRingOneAddress extracts zone and node ID from a wg1 [netip.Addr]
// wg1 addresses are of the form `10.{{zoneID << 4}}.{{nodeID}}`
func ParseRingOneAddress(addr netip.Addr) (zoneID rings.ZoneID, nodeID rings.NodeID, ok bool) {
if addr.IsValid() {
a4 := addr.As4()
if a4[0] == 10 && a4[2] == 0 {
zoneID = rings.ZoneID(a4[1] >> 4)
nodeID = rings.NodeID(a4[3])
return zoneID, nodeID, true
}
}
return 0, 0, false
}
// RingOneAddress returns a wg1 IP address
func RingOneAddress(zoneID rings.ZoneID, nodeID rings.NodeID) (netip.Addr, bool) {
switch {
case !ValidZoneID(zoneID) || !ValidNodeID(nodeID):
return netip.Addr{}, false
default:
a4 := [4]uint8{10, uint8(zoneID << 4), 0, uint8(nodeID)}
return netip.AddrFrom4(a4), true
}
}
var (
_ MachineIterator = (*Ring)(nil)
_ ZoneIterator = (*Ring)(nil)
@@ -192,7 +126,8 @@ func (r *Ring) AddPeer(p *Machine) bool {
nodeID := p.ID
zoneID := p.Zone()
addr, _ := r.Encode(zoneID, nodeID)
regionID := p.Region()
addr, _ := r.Encode(regionID, zoneID, nodeID)
rp := &RingPeer{
Node: p,
@@ -222,27 +157,27 @@ func (r *Ring) AddPeer(p *Machine) bool {
}
func (r *Ring) setRingZeroAllowedIPs(rp *RingPeer) {
zoneID, _, _ := r.Decode(rp.Address)
regionID, zoneID, _, _ := r.Decode(rp.Address)
// everyone on ring0 is a gateway to ring1
addr, _ := RingOneAddress(zoneID, 0)
rp.AllowCIDR(addr, 12)
subnet, _ := rings.RingOnePrefix(regionID, zoneID)
rp.AllowSubnet(subnet)
// peer
rp.AllowCIDR(rp.Address, 32)
}
func (r *Ring) setRingOneGatewayAllowedIPs(rp *RingPeer) {
zoneID, _, _ := r.Decode(rp.Address)
regionID, zoneID, _, _ := r.Decode(rp.Address)
// peer
rp.AllowCIDR(rp.Address, 32)
// ring1 gateways connect to all other ring1 networks
r.ForEachZone(func(z *Zone) bool {
if z.ID != zoneID {
addr, _ := r.Encode(z.ID, 0)
rp.AllowCIDR(addr, 12)
if !z.Is(regionID, zoneID) {
subnet := z.RingOnePrefix()
rp.AllowSubnet(subnet)
}
return false
})
@@ -251,7 +186,7 @@ func (r *Ring) setRingOneGatewayAllowedIPs(rp *RingPeer) {
r.ForEachZone(func(z *Zone) bool {
z.ForEachMachine(func(p *Machine) bool {
if p.IsGateway() {
addr, _ := RingZeroAddress(z.ID, p.ID)
addr, _ := p.RingZeroAddress()
rp.AllowCIDR(addr, 32)
}
return false
@@ -318,15 +253,29 @@ type RingPeer struct {
// AllowCIDR allows an IP range via this peer
func (rp *RingPeer) AllowCIDR(addr netip.Addr, bits int) {
cidr := netip.PrefixFrom(addr, bits)
rp.PeerConfig.AllowedIPs = append(rp.PeerConfig.AllowedIPs, cidr)
rp.AllowSubnet(netip.PrefixFrom(addr, bits))
}
// AllowSubnet allows an IP range via this peer
func (rp *RingPeer) AllowSubnet(subnet netip.Prefix) {
rp.PeerConfig.AllowedIPs = append(rp.PeerConfig.AllowedIPs, subnet)
}
// NewRing composes a new Ring for Wireguard setup
func NewRing(z ZoneIterator, m MachineIterator, ring int) (*Ring, error) {
r := &Ring{
RingAddressEncoder: Rings[ring],
ZoneIterator: z,
func NewRing(z ZoneIterator, m MachineIterator, ringID rings.RingID) (*Ring, error) {
var r *Ring
for _, ring := range Rings {
if ring.ID == ringID {
r = &Ring{
RingAddressEncoder: ring,
ZoneIterator: z,
}
break
}
}
if r == nil {
return nil, core.QuietWrap(fs.ErrInvalid, "invalid ring (%v)", ringID)
}
m.ForEachMachine(func(p *Machine) bool {