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Keep original server names in HAproxy backends #59

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9 changes: 5 additions & 4 deletions consul/config.go
View file
Original file line number Diff line number Diff line change
@@ -32,13 +32,14 @@ func (n Upstream) Equal(o Upstream) bool {
}

type UpstreamNode struct {
Host string
Port int
Weight int
Name string
Address string
Port int
Weight int
}

func (n UpstreamNode) ID() string {
return fmt.Sprintf("%s:%d", n.Host, n.Port)
return fmt.Sprintf("%s:%d", n.Address, n.Port)
}

func (n UpstreamNode) Equal(o UpstreamNode) bool {
16 changes: 10 additions & 6 deletions consul/watcher.go
View file
Original file line number Diff line number Diff line change
@@ -454,9 +454,12 @@ func (w *Watcher) genCfg() Config {
}
for _, s := range up.Nodes {
serviceInstancesTotal++
host := s.Service.Address
if host == "" {
host = s.Node.Address

name := s.Node.Node
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name would not be unique: the proxy might try to target several instances of the same service on 1 single node


address := s.Service.Address
if address == "" {
address = s.Node.Address
}

weight := 1
@@ -474,9 +477,10 @@ func (w *Watcher) genCfg() Config {
serviceInstancesAlive++

upstream.Nodes = append(upstream.Nodes, UpstreamNode{
Host: host,
Port: s.Service.Port,
Weight: weight,
Name: name,
Address: address,
Port: s.Service.Port,
Weight: weight,
})
}

8 changes: 4 additions & 4 deletions haproxy/dataplane/backend.go
View file
Original file line number Diff line number Diff line change
@@ -58,15 +58,15 @@ func (t *tnx) CreateServer(beName string, srv models.Server) error {
return t.client.makeReq(http.MethodPost, fmt.Sprintf("/v1/services/haproxy/configuration/servers?backend=%s&transaction_id=%s", beName, t.txID), srv, nil)
}

func (t *tnx) ReplaceServer(beName string, srv models.Server) error {
func (t *tnx) ReplaceServer(beName string, oldSrvName string, newSrv models.Server) error {
t.After(func() error {
return t.client.ReplaceServer(beName, srv)
return t.client.ReplaceServer(beName, oldSrvName, newSrv)
})
return nil
}

func (c *Dataplane) ReplaceServer(beName string, srv models.Server) error {
err := c.makeReq(http.MethodPut, fmt.Sprintf("/v1/services/haproxy/configuration/servers/%s?backend=%s&version=%d", srv.Name, beName, c.version), srv, nil)
func (c *Dataplane) ReplaceServer(beName string, oldSrvName string, newSrv models.Server) error {
err := c.makeReq(http.MethodPut, fmt.Sprintf("/v1/services/haproxy/configuration/servers/%s?backend=%s&version=%d", oldSrvName, beName, c.version), newSrv, nil)
if err != nil {
return err
}
2 changes: 1 addition & 1 deletion haproxy/state/apply.go
View file
Original file line number Diff line number Diff line change
@@ -151,7 +151,7 @@ func applyBackends(ha HAProxy, old, new []Backend) error {
continue
}

err := ha.ReplaceServer(newBack.Backend.Name, s)
err := ha.ReplaceServer(newBack.Backend.Name, oldServers[i].Name, s)
if err != nil {
return err
}
40 changes: 20 additions & 20 deletions haproxy/state/apply_backend_test.go
View file
Original file line number Diff line number Diff line change
@@ -65,7 +65,7 @@ func TestNoChangeBackend(t *testing.T) {
},
Servers: []models.Server{
models.Server{
Name: "srv_0",
Name: "some-server",
Address: "1.2.3.4",
Port: int64p(8080),
Maintenance: models.ServerMaintenanceDisabled,
@@ -82,7 +82,7 @@ func TestNoChangeBackend(t *testing.T) {
},
Servers: []models.Server{
models.Server{
Name: "srv_0",
Name: "some-server",
Address: "1.2.3.4",
Port: int64p(8080),
Maintenance: models.ServerMaintenanceDisabled,
@@ -138,7 +138,7 @@ func TestAddServerDifferentSize(t *testing.T) {
},
Servers: []models.Server{
models.Server{
Name: "srv_0",
Name: "some-server",
Address: "1.2.3.4",
Port: int64p(8080),
Maintenance: models.ServerMaintenanceDisabled,
@@ -156,7 +156,7 @@ func TestAddServerDifferentSize(t *testing.T) {
ha.RequireOps(t,
RequireOp(haOpDeleteBackend, "back"),
RequireOp(haOpCreateBackend, "back"),
RequireOp(haOpCreateServer, "srv_0"),
RequireOp(haOpCreateServer, "some-server"),
)
}

@@ -169,13 +169,13 @@ func TestAddServerSameSize(t *testing.T) {
},
Servers: []models.Server{
models.Server{
Name: "srv_0",
Name: "some-server",
Address: "1.2.3.4",
Port: int64p(8080),
Maintenance: models.ServerMaintenanceDisabled,
},
models.Server{
Name: "srv_1",
Name: "disabled_server_0",
Address: "127.0.0.1",
Port: int64p(1),
Maintenance: models.ServerMaintenanceEnabled,
@@ -192,13 +192,13 @@ func TestAddServerSameSize(t *testing.T) {
},
Servers: []models.Server{
models.Server{
Name: "srv_0",
Name: "some-server",
Address: "1.2.3.4",
Port: int64p(8080),
Maintenance: models.ServerMaintenanceDisabled,
},
models.Server{
Name: "srv_1",
Name: "different-server",
Address: "1.2.3.5",
Port: int64p(8081),
Maintenance: models.ServerMaintenanceDisabled,
@@ -214,7 +214,7 @@ func TestAddServerSameSize(t *testing.T) {
require.Nil(t, err)

ha.RequireOps(t,
RequireOp(haOpReplaceServer, "srv_1"),
RequireOp(haOpReplaceServer, "disabled_server_0"),
)
}

@@ -227,13 +227,13 @@ func TestRemoveServerSameSize(t *testing.T) {
},
Servers: []models.Server{
models.Server{
Name: "srv_0",
Name: "some-server",
Address: "1.2.3.4",
Port: int64p(8080),
Maintenance: models.ServerMaintenanceDisabled,
},
models.Server{
Name: "srv_1",
Name: "different-server",
Address: "1.2.3.5",
Port: int64p(8081),
Maintenance: models.ServerMaintenanceDisabled,
@@ -250,13 +250,13 @@ func TestRemoveServerSameSize(t *testing.T) {
},
Servers: []models.Server{
models.Server{
Name: "srv_0",
Name: "disabled_server_0",
Address: "127.0.0.1",
Port: int64p(1),
Maintenance: models.ServerMaintenanceEnabled,
},
models.Server{
Name: "srv_1",
Name: "different-server",
Address: "1.2.3.5",
Port: int64p(8081),
Maintenance: models.ServerMaintenanceDisabled,
@@ -272,7 +272,7 @@ func TestRemoveServerSameSize(t *testing.T) {
require.Nil(t, err)

ha.RequireOps(t,
RequireOp(haOpReplaceServer, "srv_0"),
RequireOp(haOpReplaceServer, "some-server"),
)
}

@@ -285,7 +285,7 @@ func TestDifferentCerts(t *testing.T) {
},
Servers: []models.Server{
models.Server{
Name: "srv_0",
Name: "some-server",
Address: "1.2.3.4",
Port: int64p(8080),
Maintenance: models.ServerMaintenanceDisabled,
@@ -304,7 +304,7 @@ func TestDifferentCerts(t *testing.T) {
},
Servers: []models.Server{
models.Server{
Name: "srv_0",
Name: "some-server",
Address: "1.2.3.4",
Port: int64p(8080),
Maintenance: models.ServerMaintenanceDisabled,
@@ -324,7 +324,7 @@ func TestDifferentCerts(t *testing.T) {
ha.RequireOps(t,
RequireOp(haOpDeleteBackend, "back"),
RequireOp(haOpCreateBackend, "back"),
RequireOp(haOpCreateServer, "srv_0"),
RequireOp(haOpCreateServer, "some-server"),
)
}

@@ -337,7 +337,7 @@ func TestBackendChange(t *testing.T) {
},
Servers: []models.Server{
models.Server{
Name: "srv_0",
Name: "some-server",
Address: "1.2.3.4",
Port: int64p(8080),
Maintenance: models.ServerMaintenanceDisabled,
@@ -355,7 +355,7 @@ func TestBackendChange(t *testing.T) {
},
Servers: []models.Server{
models.Server{
Name: "srv_0",
Name: "some-server",
Address: "1.2.3.4",
Port: int64p(8080),
Maintenance: models.ServerMaintenanceDisabled,
@@ -373,6 +373,6 @@ func TestBackendChange(t *testing.T) {
ha.RequireOps(t,
RequireOp(haOpDeleteBackend, "back"),
RequireOp(haOpCreateBackend, "back"),
RequireOp(haOpCreateServer, "srv_0"),
RequireOp(haOpCreateServer, "some-server"),
)
}
4 changes: 2 additions & 2 deletions haproxy/state/fake_ha_test.go
View file
Original file line number Diff line number Diff line change
@@ -98,10 +98,10 @@ func (h *fakeHA) CreateServer(beName string, srv models.Server) error {
return nil
}

func (h *fakeHA) ReplaceServer(beName string, srv models.Server) error {
func (h *fakeHA) ReplaceServer(beName string, oldSrvName string, newSrv models.Server) error {
h.ops = append(h.ops, fakeHAOp{
Type: haOpReplaceServer,
Name: srv.Name,
Name: oldSrvName,
})
return nil
}
70 changes: 38 additions & 32 deletions haproxy/state/snapshot_test.go
View file
Original file line number Diff line number Diff line change
@@ -26,14 +26,16 @@ func GetTestConsulConfig() consul.Config {
LocalBindPort: 10000,
Nodes: []consul.UpstreamNode{
consul.UpstreamNode{
Host: "1.2.3.4",
Port: 8080,
Weight: 5,
Name: "some-server",
Address: "1.2.3.4",
Port: 8080,
Weight: 5,
},
consul.UpstreamNode{
Host: "1.2.3.5",
Port: 8081,
Weight: 8,
Name: "different-server",
Address: "1.2.3.5",
Port: 8081,
Weight: 8,
},
},
},
@@ -155,7 +157,7 @@ func GetTestHAConfig(baseCfg string) State {
},
Servers: []models.Server{
models.Server{
Name: "srv_0",
Name: "some-server",
Address: "1.2.3.4",
Port: int64p(8080),
Weight: int64p(5),
@@ -166,7 +168,7 @@ func GetTestHAConfig(baseCfg string) State {
Maintenance: models.ServerMaintenanceDisabled,
},
models.Server{
Name: "srv_1",
Name: "different-server",
Address: "1.2.3.5",
Port: int64p(8081),
Weight: int64p(8),
@@ -234,36 +236,40 @@ func TestServerUpdate(t *testing.T) {
consulCfg := GetTestConsulConfig()
consulCfg.Upstreams[0].Nodes = consulCfg.Upstreams[0].Nodes[1:]

oldState := GetTestHAConfig("/")

// remove first server
expectedNewState := GetTestHAConfig("/")
expectedNewState.Backends[1].Servers[0].Maintenance = models.ServerMaintenanceEnabled
expectedNewState.Backends[1].Servers[0].Address = "127.0.0.1"
expectedNewState.Backends[1].Servers[0].Port = int64p(1)
expectedNewState.Backends[1].Servers[0].Weight = int64p(1)
expectedRemovedFirstServer := GetTestHAConfig("/")
expectedRemovedFirstServer.Backends[1].Servers[0].Maintenance = models.ServerMaintenanceEnabled
expectedRemovedFirstServer.Backends[1].Servers[0].Name = "disabled_server_0"
expectedRemovedFirstServer.Backends[1].Servers[0].Address = "127.0.0.1"
expectedRemovedFirstServer.Backends[1].Servers[0].Port = int64p(1)
expectedRemovedFirstServer.Backends[1].Servers[0].Weight = int64p(1)

originalState := GetTestHAConfig("/")
actualRemovedFirstServer, err := Generate(TestOpts, TestCertStore, originalState, consulCfg)

generated, err := Generate(TestOpts, TestCertStore, oldState, consulCfg)
require.Nil(t, err)
require.Equal(t, expectedNewState, generated)
require.Equal(t, expectedRemovedFirstServer, actualRemovedFirstServer)

// re-add first server
generated, err = Generate(TestOpts, TestCertStore, generated, GetTestConsulConfig())
require.Nil(t, err)
require.Equal(t, GetTestHAConfig("/"), generated)
originalConsulCfg := GetTestConsulConfig()
readdedFirstServer, err2 := Generate(TestOpts, TestCertStore, actualRemovedFirstServer, originalConsulCfg)

require.Nil(t, err2)
require.Equal(t, originalState, readdedFirstServer)

// add another one
consulCfg = GetTestConsulConfig()
consulCfg.Upstreams[0].Nodes = append(consulCfg.Upstreams[0].Nodes, consul.UpstreamNode{
Host: "1.2.3.6",
Port: 8082,
Weight: 10,
addedOneServerConsulCfg := GetTestConsulConfig()
addedOneServerConsulCfg.Upstreams[0].Nodes = append(addedOneServerConsulCfg.Upstreams[0].Nodes, consul.UpstreamNode{
Name: "even-different-server",
Address: "1.2.3.6",
Port: 8082,
Weight: 10,
})

expectedNewState = GetTestHAConfig("/")
expectedNewState.Backends[1].Servers = append(expectedNewState.Backends[1].Servers,
expectedAddedOneServer := GetTestHAConfig("/")
expectedAddedOneServer.Backends[1].Servers = append(expectedAddedOneServer.Backends[1].Servers,
models.Server{
Name: "srv_2",
Name: "even-different-server",
Address: "1.2.3.6",
Port: int64p(8082),
Weight: int64p(10),
@@ -273,8 +279,8 @@ func TestServerUpdate(t *testing.T) {
Verify: models.BindVerifyRequired,
Maintenance: models.ServerMaintenanceDisabled,
},
models.Server{
Name: "srv_3",
models.Server{ // because we always make slot for one more
Name: "disabled_server_3",
Address: "127.0.0.1",
Port: int64p(1),
Weight: int64p(1),
@@ -286,9 +292,9 @@ func TestServerUpdate(t *testing.T) {
},
)

generated, err = Generate(TestOpts, TestCertStore, generated, consulCfg)
actualAddedOneServer, err := Generate(TestOpts, TestCertStore, expectedAddedOneServer, addedOneServerConsulCfg)
require.Nil(t, err)
require.Equal(t, expectedNewState, generated)
require.Equal(t, expectedAddedOneServer, actualAddedOneServer)
}

type fakeCertStore struct{}
2 changes: 1 addition & 1 deletion haproxy/state/states.go
View file
Original file line number Diff line number Diff line change
@@ -28,7 +28,7 @@ type HAProxy interface {
DeleteBackend(name string) error
CreateBackend(be models.Backend) error
CreateServer(beName string, srv models.Server) error
ReplaceServer(beName string, srv models.Server) error
ReplaceServer(beName string, oldSrvName string, newSrv models.Server) error
DeleteServer(beName string, name string) error
CreateFilter(parentType, parentName string, filter models.Filter) error
CreateTCPRequestRule(parentType, parentName string, rule models.TCPRequestRule) error
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