func TestGetFirstRangeDescriptor(t *testing.T) {
n := gossip.NewSimulationNetwork(3, "unix", gossip.DefaultTestGossipInterval)
kv := NewDistKV(n.Nodes[0].Gossip)
if _, err := kv.getFirstRangeDescriptor(); err == nil {
t.Errorf("expected not to find first range descriptor")
}
expectedDesc := &proto.RangeDescriptor{}
expectedDesc.StartKey = engine.Key("a")
expectedDesc.EndKey = engine.Key("c")
// Add first RangeDescriptor to a node different from the node for this kv
// and ensure that this kv has the information within a given time.
n.Nodes[1].Gossip.AddInfo(
gossip.KeyFirstRangeMetadata, *expectedDesc, time.Hour)
maxCycles := 10
n.SimulateNetwork(func(cycle int, network *gossip.SimulationNetwork) bool {
desc, err := kv.getFirstRangeDescriptor()
if err != nil {
if cycle >= maxCycles {
t.Errorf("could not get range descriptor after %d cycles", cycle)
return false
}
return true
}
if !bytes.Equal(desc.StartKey, expectedDesc.StartKey) ||
!bytes.Equal(desc.EndKey, expectedDesc.EndKey) {
t.Errorf("expected first range descriptor %v, instead was %v",
expectedDesc, desc)
}
return false
})
n.Stop()
}
func main() {
// Seed the random number generator for non-determinism across
// multiple runs.
rand.Seed(time.Now().UTC().UnixNano())
if f := flag.Lookup("alsologtostderr"); f != nil {
fmt.Println("Starting simulation. Add -alsologtostderr to see progress.")
}
flag.Parse()
dirName, err := ioutil.TempDir("", "gossip-simulation-")
if err != nil {
log.Fatalf("could not create temporary directory for gossip simulation output: %s", err)
}
// Simulation callbacks to run the simulation for cycleCount
// cycles. At each cycle % outputEvery, a dot file showing the
// state of the network graph is output.
nodeCount := 3
gossipInterval := simGossipInterval
numCycles := 10
outputEvery := 1
switch *size {
case "tiny":
// Use default parameters.
case "small":
nodeCount = 10
case "medium":
nodeCount = 25
case "large":
nodeCount = 50
gossipInterval = time.Millisecond * 250
case "huge":
nodeCount = 100
gossipInterval = time.Second
numCycles = 20
outputEvery = 2
case "ginormous":
nodeCount = 250
gossipInterval = time.Second * 3
numCycles = 20
outputEvery = 2
default:
log.Fatalf("unknown simulation size: %s", *size)
}
edgeSet := make(map[string]edge)
n := gossip.NewSimulationNetwork(nodeCount, *networkType, gossipInterval)
n.SimulateNetwork(
func(cycle int, network *gossip.SimulationNetwork) bool {
if cycle == numCycles {
return false
}
// Update infos.
nodes := network.Nodes
for i := 0; i < len(nodes); i++ {
node := nodes[i].Gossip
if err := node.AddInfo(nodes[i].Addr.String(), int64(cycle), time.Hour); err != nil {
log.Infof("error updating infos addr: %s cycle: %v: %s",
nodes[i].Addr.String(), cycle, err)
}
}
// Output dot graph periodically.
if (cycle+1)%outputEvery == 0 {
dotFN := fmt.Sprintf("%s/sim-cycle-%d.dot", dirName, cycle)
outputDotFile(dotFN, cycle, network, edgeSet)
}
return true
})
n.Stop()
// Output instructions for viewing graphs.
fmt.Printf("To view simulation graph output run (you must install graphviz):\n\nfor f in %s/*.dot ; do circo $f -Tpng -o $f.png ; echo $f.png ; done\n", dirName)
}
func TestVerifyPermissions(t *testing.T) {
n := gossip.NewSimulationNetwork(1, "unix", gossip.DefaultTestGossipInterval)
kv := NewDistKV(n.Nodes[0].Gossip)
config1 := &proto.PermConfig{
Read: []string{"read1", "readAll", "rw", "rwAll"},
Write: []string{"write1", "writeAll", "rw", "rwAll"}}
config2 := &proto.PermConfig{
Read: []string{"read2", "readAll", "rw2", "rwAll"},
Write: []string{"write2", "writeAll", "rw2", "rwAll"}}
configs := []*storage.PrefixConfig{
{engine.KeyMin, nil, config1},
{engine.Key("a"), nil, config2},
}
configMap, err := storage.NewPrefixConfigMap(configs)
if err != nil {
t.Fatalf("failed to make prefix config map, err: %s", err.Error())
}
kv.gossip.AddInfo(gossip.KeyConfigPermission, configMap, time.Hour)
readMethods := storage.ReadMethods
writeMethods := storage.WriteMethods
readOnlyMethods := make([]string, 0, len(readMethods))
writeOnlyMethods := make([]string, 0, len(writeMethods))
readWriteMethods := make([]string, 0, len(readMethods)+len(writeMethods))
for _, readM := range readMethods {
if storage.IsReadOnly(readM) {
readOnlyMethods = append(readOnlyMethods, readM)
} else {
readWriteMethods = append(readWriteMethods, readM)
}
}
for _, writeM := range writeMethods {
if !storage.NeedReadPerm(writeM) {
writeOnlyMethods = append(writeOnlyMethods, writeM)
}
}
testData := []struct {
// Permission-based db methods from the storage package.
methods []string
user string
startKey, endKey engine.Key
hasPermission bool
}{
// Test permissions within a single range
{readOnlyMethods, "read1", engine.KeyMin, engine.KeyMin, true},
{readOnlyMethods, "rw", engine.KeyMin, engine.KeyMin, true},
{readOnlyMethods, "write1", engine.KeyMin, engine.KeyMin, false},
{readOnlyMethods, "random", engine.KeyMin, engine.KeyMin, false},
{readWriteMethods, "rw", engine.KeyMin, engine.KeyMin, true},
{readWriteMethods, "read1", engine.KeyMin, engine.KeyMin, false},
{readWriteMethods, "write1", engine.KeyMin, engine.KeyMin, false},
{writeOnlyMethods, "write1", engine.KeyMin, engine.KeyMin, true},
{writeOnlyMethods, "rw", engine.KeyMin, engine.KeyMin, true},
{writeOnlyMethods, "read1", engine.KeyMin, engine.KeyMin, false},
{writeOnlyMethods, "random", engine.KeyMin, engine.KeyMin, false},
// Test permissions across both ranges
{readOnlyMethods, "readAll", engine.KeyMin, engine.Key("b"), true},
{readOnlyMethods, "read1", engine.KeyMin, engine.Key("b"), false},
{readOnlyMethods, "read2", engine.KeyMin, engine.Key("b"), false},
{readOnlyMethods, "random", engine.KeyMin, engine.Key("b"), false},
{readWriteMethods, "rwAll", engine.KeyMin, engine.Key("b"), true},
{readWriteMethods, "rw", engine.KeyMin, engine.Key("b"), false},
{readWriteMethods, "random", engine.KeyMin, engine.Key("b"), false},
{writeOnlyMethods, "writeAll", engine.KeyMin, engine.Key("b"), true},
{writeOnlyMethods, "write1", engine.KeyMin, engine.Key("b"), false},
{writeOnlyMethods, "write2", engine.KeyMin, engine.Key("b"), false},
{writeOnlyMethods, "random", engine.KeyMin, engine.Key("b"), false},
// Test permissions within and around the boundaries of a range,
// representatively using rw methods.
{readWriteMethods, "rw2", engine.Key("a"), engine.Key("b"), true},
{readWriteMethods, "rwAll", engine.Key("a"), engine.Key("b"), true},
{readWriteMethods, "rw2", engine.Key("a"), engine.Key("a"), true},
{readWriteMethods, "rw2", engine.Key("a"), engine.Key("a1"), true},
{readWriteMethods, "rw2", engine.Key("a"), engine.Key("b1"), false},
{readWriteMethods, "rw2", engine.Key("a3"), engine.Key("a4"), true},
{readWriteMethods, "rw2", engine.Key("a3"), engine.Key("b1"), false},
}
for _, test := range testData {
for _, method := range test.methods {
err := kv.verifyPermissions(
method,
&proto.RequestHeader{
User: test.user, Key: test.startKey, EndKey: test.endKey})
if err != nil && test.hasPermission {
t.Errorf("user: %s should have had permission to %s, err: %s",
test.user, method, err.Error())
} else if err == nil && !test.hasPermission {
t.Errorf("user: %s should not have had permission to %s",
test.user, method)
}
}
}
n.Stop()
}
