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Consul is a distributed, highly available, and data center aware solution to connect and configure applications across dynamic, distributed infrastructure.
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consul/agent/sidecar_service_test.go

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package agent
import (
"fmt"
"testing"
"time"
"github.com/stretchr/testify/require"
"github.com/hashicorp/consul/agent/structs"
)
func TestAgent_sidecarServiceFromNodeService(t *testing.T) {
if testing.Short() {
t.Skip("too slow for testing.Short")
}
tests := []struct {
name string
maxPort int
preRegister *structs.ServiceDefinition
sd *structs.ServiceDefinition
token string
autoPortsDisabled bool
wantNS *structs.NodeService
wantChecks []*structs.CheckType
wantToken string
wantErr string
}{
{
name: "no sidecar",
sd: &structs.ServiceDefinition{
Name: "web",
Port: 1111,
},
token: "foo",
wantNS: nil,
wantChecks: nil,
wantToken: "",
wantErr: "", // Should NOT error
},
{
name: "all the defaults",
sd: &structs.ServiceDefinition{
ID: "web1",
Name: "web",
Port: 1111,
Connect: &structs.ServiceConnect{
SidecarService: &structs.ServiceDefinition{},
},
},
token: "foo",
wantNS: &structs.NodeService{
EnterpriseMeta: *structs.DefaultEnterpriseMeta(),
Kind: structs.ServiceKindConnectProxy,
ID: "web1-sidecar-proxy",
Service: "web-sidecar-proxy",
Port: 2222,
LocallyRegisteredAsSidecar: true,
Proxy: structs.ConnectProxyConfig{
DestinationServiceName: "web",
DestinationServiceID: "web1",
LocalServiceAddress: "127.0.0.1",
LocalServicePort: 1111,
},
},
wantChecks: []*structs.CheckType{
{
Name: "Connect Sidecar Listening",
TCP: "127.0.0.1:2222",
Interval: 10 * time.Second,
},
{
Name: "Connect Sidecar Aliasing web1",
AliasService: "web1",
},
},
wantToken: "foo",
},
{
name: "all the allowed overrides",
sd: &structs.ServiceDefinition{
ID: "web1",
Name: "web",
Port: 1111,
Tags: []string{"baz"},
Meta: map[string]string{"foo": "baz"},
Connect: &structs.ServiceConnect{
SidecarService: &structs.ServiceDefinition{
Name: "motorbike1",
Port: 3333,
Tags: []string{"foo", "bar"},
Address: "127.127.127.127",
Meta: map[string]string{"foo": "bar"},
Check: structs.CheckType{
ScriptArgs: []string{"sleep", "1"},
Interval: 999 * time.Second,
},
Token: "custom-token",
EnableTagOverride: true,
Proxy: &structs.ConnectProxyConfig{
DestinationServiceName: "web",
DestinationServiceID: "web1",
LocalServiceAddress: "127.0.127.0",
LocalServicePort: 9999,
Config: map[string]interface{}{"baz": "qux"},
Upstreams: structs.TestUpstreams(t),
},
},
},
},
token: "foo",
wantNS: &structs.NodeService{
EnterpriseMeta: *structs.DefaultEnterpriseMeta(),
Kind: structs.ServiceKindConnectProxy,
ID: "web1-sidecar-proxy",
Service: "motorbike1",
Port: 3333,
Tags: []string{"foo", "bar"},
Address: "127.127.127.127",
Meta: map[string]string{
"foo": "bar",
},
LocallyRegisteredAsSidecar: true,
EnableTagOverride: true,
Proxy: structs.ConnectProxyConfig{
DestinationServiceName: "web",
DestinationServiceID: "web1",
LocalServiceAddress: "127.0.127.0",
LocalServicePort: 9999,
Config: map[string]interface{}{"baz": "qux"},
Upstreams: structs.TestAddDefaultsToUpstreams(t, structs.TestUpstreams(t)),
},
},
wantChecks: []*structs.CheckType{
{
ScriptArgs: []string{"sleep", "1"},
Interval: 999 * time.Second,
},
},
wantToken: "custom-token",
},
{
name: "no auto ports available",
// register another sidecar consuming our 1 and only allocated auto port.
preRegister: &structs.ServiceDefinition{
Kind: structs.ServiceKindConnectProxy,
Name: "api-proxy-sidecar",
Port: 2222, // Consume the one available auto-port
Proxy: &structs.ConnectProxyConfig{
DestinationServiceName: "api",
},
},
sd: &structs.ServiceDefinition{
ID: "web1",
Name: "web",
Port: 1111,
Connect: &structs.ServiceConnect{
SidecarService: &structs.ServiceDefinition{},
},
},
token: "foo",
wantErr: "none left in the configured range [2222, 2222]",
},
{
name: "auto ports disabled",
autoPortsDisabled: true,
sd: &structs.ServiceDefinition{
ID: "web1",
Name: "web",
Port: 1111,
Connect: &structs.ServiceConnect{
SidecarService: &structs.ServiceDefinition{},
},
},
token: "foo",
wantErr: "auto-assignment disabled in config",
},
{
name: "inherit tags and meta",
sd: &structs.ServiceDefinition{
ID: "web1",
Name: "web",
Port: 1111,
Tags: []string{"foo"},
Meta: map[string]string{"foo": "bar"},
Connect: &structs.ServiceConnect{
SidecarService: &structs.ServiceDefinition{},
},
},
wantNS: &structs.NodeService{
EnterpriseMeta: *structs.DefaultEnterpriseMeta(),
Kind: structs.ServiceKindConnectProxy,
ID: "web1-sidecar-proxy",
Service: "web-sidecar-proxy",
Port: 2222,
Tags: []string{"foo"},
Meta: map[string]string{"foo": "bar"},
LocallyRegisteredAsSidecar: true,
Proxy: structs.ConnectProxyConfig{
DestinationServiceName: "web",
DestinationServiceID: "web1",
LocalServiceAddress: "127.0.0.1",
LocalServicePort: 1111,
},
},
wantChecks: []*structs.CheckType{
{
Name: "Connect Sidecar Listening",
TCP: "127.0.0.1:2222",
Interval: 10 * time.Second,
},
{
Name: "Connect Sidecar Aliasing web1",
AliasService: "web1",
},
},
},
{
name: "invalid check type",
sd: &structs.ServiceDefinition{
ID: "web1",
Name: "web",
Port: 1111,
Connect: &structs.ServiceConnect{
SidecarService: &structs.ServiceDefinition{
Check: structs.CheckType{
TCP: "foo",
// Invalid since no interval specified
},
},
},
},
token: "foo",
wantErr: "Interval must be > 0",
},
{
name: "invalid meta",
sd: &structs.ServiceDefinition{
ID: "web1",
Name: "web",
Port: 1111,
Connect: &structs.ServiceConnect{
SidecarService: &structs.ServiceDefinition{
Meta: map[string]string{
"consul-reserved-key-should-be-rejected": "true",
},
},
},
},
token: "foo",
wantErr: "reserved for internal use",
},
{
name: "re-registering same sidecar with no port should pick same one",
// Allow multiple ports to be sure we get the right one
maxPort: 2500,
// Pre register the sidecar we want
preRegister: &structs.ServiceDefinition{
Kind: structs.ServiceKindConnectProxy,
ID: "web1-sidecar-proxy",
Name: "web-sidecar-proxy",
Port: 2222,
Proxy: &structs.ConnectProxyConfig{
DestinationServiceName: "web",
DestinationServiceID: "web1",
LocalServiceAddress: "127.0.0.1",
LocalServicePort: 1111,
},
},
// Register same again but with different service port
sd: &structs.ServiceDefinition{
ID: "web1",
Name: "web",
Port: 1112,
Connect: &structs.ServiceConnect{
SidecarService: &structs.ServiceDefinition{},
},
},
token: "foo",
wantNS: &structs.NodeService{
EnterpriseMeta: *structs.DefaultEnterpriseMeta(),
Kind: structs.ServiceKindConnectProxy,
ID: "web1-sidecar-proxy",
Service: "web-sidecar-proxy",
Port: 2222, // Should claim the same port as before
LocallyRegisteredAsSidecar: true,
Proxy: structs.ConnectProxyConfig{
DestinationServiceName: "web",
DestinationServiceID: "web1",
LocalServiceAddress: "127.0.0.1",
LocalServicePort: 1112,
},
},
wantChecks: []*structs.CheckType{
{
Name: "Connect Sidecar Listening",
TCP: "127.0.0.1:2222",
Interval: 10 * time.Second,
},
{
Name: "Connect Sidecar Aliasing web1",
AliasService: "web1",
},
},
wantToken: "foo",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// Set port range to be tiny (one availabl) to test consuming all of it.
// This allows a single assigned port at 2222 thanks to being inclusive at
// both ends.
if tt.maxPort == 0 {
tt.maxPort = 2222
}
hcl := fmt.Sprintf(`
ports {
sidecar_min_port = 2222
sidecar_max_port = %d
}
`, tt.maxPort)
if tt.autoPortsDisabled {
hcl = `
ports {
sidecar_min_port = 0
sidecar_max_port = 0
}
`
}
require := require.New(t)
a := StartTestAgent(t, TestAgent{Name: "jones", HCL: hcl})
defer a.Shutdown()
if tt.preRegister != nil {
err := a.addServiceFromSource(tt.preRegister.NodeService(), nil, false, "", ConfigSourceLocal)
require.NoError(err)
}
ns := tt.sd.NodeService()
err := ns.Validate()
require.NoError(err, "Invalid test case - NodeService must validate")
gotNS, gotChecks, gotToken, err := a.sidecarServiceFromNodeService(ns, tt.token)
if tt.wantErr != "" {
require.Error(err)
require.Contains(err.Error(), tt.wantErr)
return
}
require.NoError(err)
require.Equal(tt.wantNS, gotNS)
require.Equal(tt.wantChecks, gotChecks)
require.Equal(tt.wantToken, gotToken)
})
}
}