open-consul/agent/consul/util_test.go

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package consul
import (
"errors"
"fmt"
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"net"
"regexp"
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"testing"
"github.com/hashicorp/go-version"
"github.com/hashicorp/serf/serf"
"github.com/stretchr/testify/require"
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)
func TestGetPrivateIP(t *testing.T) {
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t.Parallel()
ip, _, err := net.ParseCIDR("10.1.2.3/32")
if err != nil {
t.Fatalf("failed to parse private cidr: %v", err)
}
pubIP, _, err := net.ParseCIDR("8.8.8.8/32")
if err != nil {
t.Fatalf("failed to parse public cidr: %v", err)
}
tests := []struct {
addrs []net.Addr
expected net.IP
err error
}{
{
addrs: []net.Addr{
&net.IPAddr{
IP: ip,
},
&net.IPAddr{
IP: pubIP,
},
},
expected: ip,
},
{
addrs: []net.Addr{
&net.IPAddr{
IP: pubIP,
},
},
err: errors.New("No private IP address found"),
},
{
addrs: []net.Addr{
&net.IPAddr{
IP: ip,
},
&net.IPAddr{
IP: ip,
},
&net.IPAddr{
IP: pubIP,
},
},
err: errors.New("Multiple private IPs found. Please configure one."),
},
}
for _, test := range tests {
ip, err := getPrivateIP(test.addrs)
switch {
case test.err != nil && err != nil:
if err.Error() != test.err.Error() {
t.Fatalf("unexpected error: %v != %v", test.err, err)
}
case (test.err == nil && err != nil) || (test.err != nil && err == nil):
t.Fatalf("unexpected error: %v != %v", test.err, err)
default:
if !test.expected.Equal(ip) {
t.Fatalf("unexpected ip: %v != %v", ip, test.expected)
}
}
}
}
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func TestIsPrivateIP(t *testing.T) {
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t.Parallel()
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if !isPrivateIP("192.168.1.1") {
t.Fatalf("bad")
}
if !isPrivateIP("172.16.45.100") {
t.Fatalf("bad")
}
if !isPrivateIP("10.1.2.3") {
t.Fatalf("bad")
}
if !isPrivateIP("100.115.110.19") {
t.Fatalf("bad")
}
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if isPrivateIP("8.8.8.8") {
t.Fatalf("bad")
}
if !isPrivateIP("127.0.0.1") {
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t.Fatalf("bad")
}
}
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func TestUtil_CanServersUnderstandProtocol(t *testing.T) {
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t.Parallel()
var members []serf.Member
// All empty list cases should return false.
for v := ProtocolVersionMin; v <= ProtocolVersionMax; v++ {
grok, err := CanServersUnderstandProtocol(members, v)
if err != nil {
t.Fatalf("err: %v", err)
}
if grok {
t.Fatalf("empty list should always return false")
}
}
// Add a non-server member.
members = append(members, serf.Member{
Tags: map[string]string{
"vsn_min": fmt.Sprintf("%d", ProtocolVersionMin),
"vsn_max": fmt.Sprintf("%d", ProtocolVersionMax),
},
})
// Make sure it doesn't get counted.
for v := ProtocolVersionMin; v <= ProtocolVersionMax; v++ {
grok, err := CanServersUnderstandProtocol(members, v)
if err != nil {
t.Fatalf("err: %v", err)
}
if grok {
t.Fatalf("non-server members should not be counted")
}
}
// Add a server member.
members = append(members, serf.Member{
Tags: map[string]string{
"role": "consul",
"vsn_min": fmt.Sprintf("%d", ProtocolVersionMin),
"vsn_max": fmt.Sprintf("%d", ProtocolVersionMax),
},
})
// Now it should report that it understands.
for v := ProtocolVersionMin; v <= ProtocolVersionMax; v++ {
grok, err := CanServersUnderstandProtocol(members, v)
if err != nil {
t.Fatalf("err: %v", err)
}
if !grok {
t.Fatalf("server should grok")
}
}
// Nobody should understand anything from the future.
for v := uint8(ProtocolVersionMax + 1); v <= uint8(ProtocolVersionMax+10); v++ {
grok, err := CanServersUnderstandProtocol(members, v)
if err != nil {
t.Fatalf("err: %v", err)
}
if grok {
t.Fatalf("server should not grok")
}
}
// Add an older server.
members = append(members, serf.Member{
Tags: map[string]string{
"role": "consul",
"vsn_min": fmt.Sprintf("%d", ProtocolVersionMin),
"vsn_max": fmt.Sprintf("%d", ProtocolVersionMax-1),
},
})
// The servers should no longer understand the max version.
for v := ProtocolVersionMin; v <= ProtocolVersionMax; v++ {
grok, err := CanServersUnderstandProtocol(members, v)
if err != nil {
t.Fatalf("err: %v", err)
}
expected := v < ProtocolVersionMax
if grok != expected {
t.Fatalf("bad: %v != %v", grok, expected)
}
}
// Try a version that's too low for the minimum.
{
grok, err := CanServersUnderstandProtocol(members, 0)
if err != nil {
t.Fatalf("err: %v", err)
}
if grok {
t.Fatalf("server should not grok")
}
}
}
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func TestIsConsulNode(t *testing.T) {
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t.Parallel()
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m := serf.Member{
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Tags: map[string]string{
"role": "node",
"dc": "east-aws",
},
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}
valid, dc := isConsulNode(m)
if !valid || dc != "east-aws" {
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t.Fatalf("bad: %v %v", valid, dc)
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}
}
func TestByteConversion(t *testing.T) {
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t.Parallel()
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var val uint64 = 2 << 50
raw := uint64ToBytes(val)
if bytesToUint64(raw) != val {
t.Fatalf("no match")
}
}
func TestGenerateUUID(t *testing.T) {
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t.Parallel()
prev := generateUUID()
for i := 0; i < 100; i++ {
id := generateUUID()
if prev == id {
t.Fatalf("Should get a new ID!")
}
matched, err := regexp.MatchString(
"[\\da-f]{8}-[\\da-f]{4}-[\\da-f]{4}-[\\da-f]{4}-[\\da-f]{12}", id)
if !matched || err != nil {
t.Fatalf("expected match %s %v %s", id, matched, err)
}
}
}
func TestGetPublicIPv6(t *testing.T) {
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t.Parallel()
ip, _, err := net.ParseCIDR("fe80::1/128")
if err != nil {
t.Fatalf("failed to parse link-local cidr: %v", err)
}
ip2, _, err := net.ParseCIDR("::1/128")
if err != nil {
t.Fatalf("failed to parse loopback cidr: %v", err)
}
ip3, _, err := net.ParseCIDR("fc00::1/128")
if err != nil {
t.Fatalf("failed to parse ULA cidr: %v", err)
}
pubIP, _, err := net.ParseCIDR("2001:0db8:85a3::8a2e:0370:7334/128")
if err != nil {
t.Fatalf("failed to parse public cidr: %v", err)
}
tests := []struct {
addrs []net.Addr
expected net.IP
err error
}{
{
addrs: []net.Addr{
&net.IPAddr{
IP: ip,
},
&net.IPAddr{
IP: ip2,
},
&net.IPAddr{
IP: ip3,
},
&net.IPAddr{
IP: pubIP,
},
},
expected: pubIP,
},
{
addrs: []net.Addr{
&net.IPAddr{
IP: ip,
},
&net.IPAddr{
IP: ip2,
},
&net.IPAddr{
IP: ip3,
},
},
err: errors.New("No public IPv6 address found"),
},
{
addrs: []net.Addr{
&net.IPAddr{
IP: ip,
},
&net.IPAddr{
IP: ip,
},
&net.IPAddr{
IP: pubIP,
},
&net.IPAddr{
IP: pubIP,
},
},
err: errors.New("Multiple public IPv6 addresses found. Please configure one."),
},
}
for _, test := range tests {
ip, err := getPublicIPv6(test.addrs)
switch {
case test.err != nil && err != nil:
if err.Error() != test.err.Error() {
t.Fatalf("unexpected error: %v != %v", test.err, err)
}
case (test.err == nil && err != nil) || (test.err != nil && err == nil):
t.Fatalf("unexpected error: %v != %v", test.err, err)
default:
if !test.expected.Equal(ip) {
t.Fatalf("unexpected ip: %v != %v", ip, test.expected)
}
}
}
}
func TestServersMeetMinimumVersion(t *testing.T) {
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t.Parallel()
makeMember := func(version string) serf.Member {
return serf.Member{
Name: "foo",
Addr: net.IP([]byte{127, 0, 0, 1}),
Tags: map[string]string{
"role": "consul",
"id": "asdf",
"dc": "east-aws",
"port": "10000",
"build": version,
"wan_join_port": "1234",
"vsn": "1",
"expect": "3",
"raft_vsn": "3",
},
Status: serf.StatusAlive,
}
}
cases := []struct {
members []serf.Member
ver *version.Version
expected bool
}{
// One server, meets reqs
{
members: []serf.Member{
makeMember("0.7.5"),
},
ver: version.Must(version.NewVersion("0.7.5")),
expected: true,
},
// One server, doesn't meet reqs
{
members: []serf.Member{
makeMember("0.7.5"),
},
ver: version.Must(version.NewVersion("0.8.0")),
expected: false,
},
// Multiple servers, meets req version
{
members: []serf.Member{
makeMember("0.7.5"),
makeMember("0.8.0"),
},
ver: version.Must(version.NewVersion("0.7.5")),
expected: true,
},
// Multiple servers, doesn't meet req version
{
members: []serf.Member{
makeMember("0.7.5"),
makeMember("0.8.0"),
},
ver: version.Must(version.NewVersion("0.8.0")),
expected: false,
},
}
for _, tc := range cases {
result := ServersMeetMinimumVersion(tc.members, tc.ver)
if result != tc.expected {
t.Fatalf("bad: %v, %v, %v", result, tc.ver.String(), tc)
}
}
}
func TestInterpolateHIL(t *testing.T) {
for _, test := range []struct {
name string
in string
vars map[string]string
exp string
ok bool
}{
// valid HIL
{
"empty",
"",
map[string]string{},
"",
true,
},
{
"no vars",
"nothing",
map[string]string{},
"nothing",
true,
},
{
"just var",
"${item}",
map[string]string{"item": "value"},
"value",
true,
},
{
"var in middle",
"before ${item}after",
map[string]string{"item": "value"},
"before valueafter",
true,
},
{
"two vars",
"before ${item}after ${more}",
map[string]string{"item": "value", "more": "xyz"},
"before valueafter xyz",
true,
},
{
"missing map val",
"${item}",
map[string]string{"item": ""},
"",
true,
},
// "weird" HIL, but not technically invalid
{
"just end",
"}",
map[string]string{},
"}",
true,
},
{
"var without start",
" item }",
map[string]string{"item": "value"},
" item }",
true,
},
{
"two vars missing second start",
"before ${ item }after more }",
map[string]string{"item": "value", "more": "xyz"},
"before valueafter more }",
true,
},
// invalid HIL
{
"just start",
"${",
map[string]string{},
"",
false,
},
{
"backwards",
"}${",
map[string]string{},
"",
false,
},
{
"no varname",
"${}",
map[string]string{},
"",
false,
},
{
"missing map key",
"${item}",
map[string]string{},
"",
false,
},
{
"var without end",
"${ item ",
map[string]string{"item": "value"},
"",
false,
},
{
"two vars missing first end",
"before ${ item after ${ more }",
map[string]string{"item": "value", "more": "xyz"},
"",
false,
},
} {
t.Run(test.name, func(t *testing.T) {
out, err := InterpolateHIL(test.in, test.vars)
if test.ok {
require.NoError(t, err)
require.Equal(t, test.exp, out)
} else {
require.NotNil(t, err)
require.Equal(t, out, "")
}
})
}
}