Ejemplo n.º 1
0
func addVLANs(c *Cluster, p *pb.Cluster) {
	for _, v := range p.Vlan {
		h := protoToHost(v.Host)
		c.AddVLAN(&seesaw.VLAN{
			ID:           uint16(*v.VlanId),
			Host:         h,
			BackendCount: make(map[seesaw.AF]uint),
			VIPCount:     make(map[seesaw.AF]uint),
		})
	}

	// Determine number of backend and VIP addresses in each VLAN.
	backends := make(map[seesaw.IP]bool)
	vips := make(map[seesaw.IP]bool)
	for _, vs := range p.Vserver {
		host := protoToHost(vs.GetEntryAddress())
		if host.IPv4Addr != nil {
			vips[seesaw.NewIP(host.IPv4Addr)] = true
		}
		if host.IPv6Addr != nil {
			vips[seesaw.NewIP(host.IPv6Addr)] = true
		}
		for _, backend := range vs.Backend {
			host := protoToHost(backend.GetHost())
			if host.IPv4Addr != nil {
				backends[seesaw.NewIP(host.IPv4Addr)] = true
			}
			if host.IPv6Addr != nil {
				backends[seesaw.NewIP(host.IPv6Addr)] = true
			}
		}
	}
	for _, v := range c.VLANs {
		for bip := range backends {
			if v.IPv4Net().Contains(bip.IP()) {
				v.BackendCount[seesaw.IPv4]++
			}
			if v.IPv6Net().Contains(bip.IP()) {
				v.BackendCount[seesaw.IPv6]++
			}
		}
		for vip := range vips {
			if v.IPv4Net().Contains(vip.IP()) {
				v.VIPCount[seesaw.IPv4]++
			}
			if v.IPv6Net().Contains(vip.IP()) {
				v.VIPCount[seesaw.IPv6]++
			}
		}
	}
}
Ejemplo n.º 2
0
// expandFWMServices returns a list of services that have been expanded from the
// vserver configuration for a firewall mark based vserver.
func (v *vserver) expandFWMServices() map[serviceKey]*service {
	svcs := make(map[serviceKey]*service)
	for _, af := range seesaw.AFs() {
		var ip net.IP
		switch af {
		case seesaw.IPv4:
			ip = v.config.Host.IPv4Addr
		case seesaw.IPv6:
			ip = v.config.Host.IPv6Addr
		}
		if ip == nil {
			continue
		}

		// Persistence, etc., is stored in the VserverEntry. For FWM services, these
		// values must be the same for all VserverEntries, so just use the first
		// one.
		var ventry *config.VserverEntry
		for _, entry := range v.config.Entries {
			ventry = entry
			break
		}

		if v.fwm[af] == 0 {
			mark, err := v.engine.fwmAlloc.get()
			if err != nil {
				log.Fatalf("%v: failed to get mark: %v", v, err)
			}
			v.fwm[af] = mark
		}
		svc := &service{
			serviceKey: serviceKey{
				af:  af,
				fwm: v.fwm[af],
			},
			ip:      seesaw.NewIP(ip),
			ventry:  ventry,
			vserver: v,
			stats:   &seesaw.ServiceStats{},
		}
		svc.ipvsSvc = svc.ipvsService()
		svcs[svc.serviceKey] = svc
	}
	return svcs
}
Ejemplo n.º 3
0
// expandServices returns a list of services that have been expanded from the
// vserver configuration.
func (v *vserver) expandServices() map[serviceKey]*service {
	if v.config.UseFWM {
		return v.expandFWMServices()
	}

	svcs := make(map[serviceKey]*service)
	for _, af := range seesaw.AFs() {
		var ip net.IP
		switch af {
		case seesaw.IPv4:
			ip = v.config.Host.IPv4Addr
		case seesaw.IPv6:
			ip = v.config.Host.IPv6Addr
		}
		if ip == nil {
			continue
		}
		for _, entry := range v.config.Entries {
			svc := &service{
				serviceKey: serviceKey{
					af:    af,
					proto: entry.Proto,
					port:  entry.Port,
				},
				ip:      seesaw.NewIP(ip),
				ventry:  entry,
				vserver: v,
				dests:   make(map[destinationKey]*destination, 0),
				stats:   &seesaw.ServiceStats{},
			}
			svc.ipvsSvc = svc.ipvsService()
			svcs[svc.serviceKey] = svc
		}
	}
	return svcs
}
Ejemplo n.º 4
0
func TestWatermarks(t *testing.T) {
	vserver := newTestVserver(nil)
	vsConfig := vserverConfig
	entriesCopy := make(map[string]*config.VserverEntry)
	vsConfig.Entries = entriesCopy
	for k, vse := range vserverConfig.Entries {
		vseCopy := *vse
		vseCopy.HighWatermark = 0.51
		vseCopy.LowWatermark = 0.49
		vsConfig.Entries[k] = &vseCopy
	}
	vserver.handleConfigUpdate(&vsConfig)

	// Both backends must be healthy for the service to come up.
	ipv4 := seesaw.NewIP(backend1.IPv4Addr)
	ipv6 := seesaw.NewIP(backend1.IPv6Addr)
	for _, c := range vserver.checks {
		if c.key.backendIP.Equal(ipv4) || c.key.backendIP.Equal(ipv6) {
			n := &checkNotification{key: c.key, status: statusHealthy}
			vserver.handleCheckNotification(n)
		}
	}
	for _, err := range checkAllDown(vserver) {
		t.Error(err)
	}
	for _, c := range vserver.checks {
		n := &checkNotification{key: c.key, status: statusHealthy}
		vserver.handleCheckNotification(n)
	}
	for _, err := range checkAllUp(vserver) {
		t.Error(err)
	}
	// One backend goes down, one stays up, service should still be up.
	for _, c := range vserver.checks {
		if c.key.backendIP.Equal(ipv4) || c.key.backendIP.Equal(ipv6) {
			n := &checkNotification{key: c.key, status: statusUnhealthy}
			vserver.handleCheckNotification(n)
		}
	}
	for _, err := range checkAllUp(vserver) {
		t.Error(err)
	}
	// Remaining dests go unhealthy, service should go down.
	for _, c := range vserver.checks {
		if !c.key.backendIP.Equal(ipv4) && !c.key.backendIP.Equal(ipv6) {
			n := &checkNotification{key: c.key, status: statusUnhealthy}
			vserver.handleCheckNotification(n)
		}
	}
	for _, err := range checkAllDown(vserver) {
		t.Error(err)
	}

	// Check edge condition: high/low watermark = 50% and one backend becomes
	// healthy => service should come up.
	vserver = newTestVserver(nil)
	for k, vse := range vserverConfig.Entries {
		vseCopy := *vse
		vseCopy.LowWatermark = 0.5
		vseCopy.HighWatermark = vseCopy.LowWatermark
		vsConfig.Entries[k] = &vseCopy
	}
	vserver.handleConfigUpdate(&vsConfig)
	for _, c := range vserver.checks {
		if c.key.backendIP.Equal(ipv4) || c.key.backendIP.Equal(ipv6) {
			n := &checkNotification{key: c.key, status: statusHealthy}
			vserver.handleCheckNotification(n)
		}
	}
	for _, err := range checkAllUp(vserver) {
		t.Error(err)
	}

	// More than two backends...
	vserver = newTestVserver(nil)
	vsConfig = vserverConfig
	vsConfig.Entries = entriesCopy
	for k, vse := range vserverConfig.Entries {
		vseCopy := *vse
		vseCopy.LowWatermark = 0.4
		vseCopy.HighWatermark = vseCopy.LowWatermark
		vsConfig.Entries[k] = &vseCopy
	}
	vsConfig.Backends = map[string]*seesaw.Backend{
		backend1.Hostname: backend1,
		backend2.Hostname: backend2,
		backend3.Hostname: backend3,
		backend4.Hostname: backend4,
		backend5.Hostname: backend5,
	}
	vserver.handleConfigUpdate(&vsConfig)
	for _, c := range vserver.checks {
		n := &checkNotification{key: c.key, status: statusHealthy}
		vserver.handleCheckNotification(n)
	}
	for _, err := range checkAllUp(vserver) {
		t.Error(err)
	}
	t.Logf("All backends healthy, vserver has been brought up")

	// Now take them down one at a time, the tipping point should be
	// when we only have one remaining backend.
	i := len(vsConfig.Backends)
	for _, b := range vsConfig.Backends {
		t.Logf("Taking down %s (%d)", b.Hostname, i)
		for _, c := range vserver.checks {
			if b.IPv4Addr.Equal(c.key.backendIP.IP()) || b.IPv6Addr.Equal(c.key.backendIP.IP()) {
				n := &checkNotification{key: c.key, status: statusUnhealthy}
				vserver.handleCheckNotification(n)
			}
		}
		i--
		var errs []error
		if i <= 1 {
			t.Logf("Expecting vserver to be down")
			errs = checkAllDown(vserver)
		} else {
			t.Logf("Expecting vserver to be up")
			errs = checkAllUp(vserver)
		}
		for _, err := range errs {
			t.Error(err)
		}
	}

	// Now bring them up again one at a time, the tipping point should be
	// when we have at least two healthy backends.
	i = 1
	for _, b := range vsConfig.Backends {
		t.Logf("Bringing up %s (%d)", b.Hostname, i)
		for _, c := range vserver.checks {
			if b.IPv4Addr.Equal(c.key.backendIP.IP()) || b.IPv6Addr.Equal(c.key.backendIP.IP()) {
				n := &checkNotification{key: c.key, status: statusHealthy}
				vserver.handleCheckNotification(n)
			}
		}
		var errs []error
		if i <= 1 {
			t.Logf("Expecting vserver to be down")
			errs = checkAllDown(vserver)
		} else {
			t.Logf("Expecting vserver to be up")
			errs = checkAllUp(vserver)
		}
		i++
		for _, err := range errs {
			t.Error(err)
		}
	}
}
Ejemplo n.º 5
0
// newDestinationKey returns a new destinationKey.
func newDestinationKey(ip net.IP) destinationKey {
	return destinationKey{seesaw.NewIP(ip)}
}
Ejemplo n.º 6
0
					"HTTP/16767_0": {
						Name:      "HTTP/16767_0",
						Mode:      seesaw.HCModeDSR,
						Type:      seesaw.HCTypeHTTPS,
						Port:      16767,
						Interval:  time.Duration(10 * time.Second), // protobuf default
						Timeout:   time.Duration(5 * time.Second),  // protobuf default
						TLSVerify: false,
						Send:      "/healthz",
						Receive:   "Ok",
						Code:      200,
					},
				},
				map[string]*seesaw.VIP{
					"192.168.255.1 (Anycast)": {
						seesaw.NewIP(net.ParseIP("192.168.255.1")),
						seesaw.AnycastVIP,
					},
				},
				true,
				false,
				nil,
			},
			"dns.resolver@au-syd": {
				"dns.resolver@au-syd",
				seesaw.Host{
					Hostname: "dns-vip1.example.com.",
					IPv4Addr: net.ParseIP("192.168.36.1").To4(),
					IPv4Mask: net.CIDRMask(26, 32),
					IPv6Addr: net.ParseIP("2015:cafe:36::a800:1ff:ffee:dd01"),
					IPv6Mask: net.CIDRMask(64, 128),