open-consul/command/agent/remote_exec_test.go

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package agent
import (
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"bytes"
"encoding/json"
"fmt"
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"reflect"
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"testing"
"time"
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"github.com/hashicorp/consul/api"
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"github.com/hashicorp/consul/consul/structs"
"github.com/hashicorp/go-uuid"
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)
func generateUUID() (ret string) {
var err error
if ret, err = uuid.GenerateUUID(); err != nil {
panic(fmt.Sprintf("Unable to generate a UUID, %v", err))
}
return ret
}
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func TestRexecWriter(t *testing.T) {
t.Parallel()
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writer := &rexecWriter{
BufCh: make(chan []byte, 16),
BufSize: 16,
BufIdle: 10 * time.Millisecond,
CancelCh: make(chan struct{}),
}
// Write short, wait for idle
start := time.Now()
n, err := writer.Write([]byte("test"))
if err != nil {
t.Fatalf("err: %v", err)
}
if n != 4 {
t.Fatalf("bad: %v", n)
}
select {
case b := <-writer.BufCh:
if len(b) != 4 {
t.Fatalf("Bad: %v", b)
}
if time.Now().Sub(start) < writer.BufIdle {
t.Fatalf("too early")
}
case <-time.After(2 * writer.BufIdle):
t.Fatalf("timeout")
}
// Write in succession to prevent the timeout
writer.Write([]byte("test"))
time.Sleep(writer.BufIdle / 2)
writer.Write([]byte("test"))
time.Sleep(writer.BufIdle / 2)
start = time.Now()
writer.Write([]byte("test"))
select {
case b := <-writer.BufCh:
if len(b) != 12 {
t.Fatalf("Bad: %v", b)
}
if time.Now().Sub(start) < writer.BufIdle {
t.Fatalf("too early")
}
case <-time.After(2 * writer.BufIdle):
t.Fatalf("timeout")
}
// Write large values, multiple flushes required
writer.Write([]byte("01234567890123456789012345678901"))
select {
case b := <-writer.BufCh:
if string(b) != "0123456789012345" {
t.Fatalf("bad: %s", b)
}
default:
t.Fatalf("should have buf")
}
select {
case b := <-writer.BufCh:
if string(b) != "6789012345678901" {
t.Fatalf("bad: %s", b)
}
default:
t.Fatalf("should have buf")
}
}
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func TestRemoteExecGetSpec(t *testing.T) {
t.Parallel()
testRemoteExecGetSpec(t, nil)
}
func TestRemoteExecGetSpec_ACLToken(t *testing.T) {
t.Parallel()
cfg := TestConfig()
cfg.ACLDatacenter = "dc1"
cfg.ACLToken = "root"
cfg.ACLDefaultPolicy = "deny"
testRemoteExecGetSpec(t, cfg)
}
func testRemoteExecGetSpec(t *testing.T, c *Config) {
a := NewTestAgent(t.Name(), nil)
defer a.Shutdown()
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event := &remoteExecEvent{
Prefix: "_rexec",
Session: makeRexecSession(t, a.Agent),
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}
defer destroySession(t, a.Agent, event.Session)
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spec := &remoteExecSpec{
Command: "uptime",
Script: []byte("#!/bin/bash"),
Wait: time.Second,
}
buf, err := json.Marshal(spec)
if err != nil {
t.Fatalf("err: %v", err)
}
key := "_rexec/" + event.Session + "/job"
setKV(t, a.Agent, key, buf)
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var out remoteExecSpec
if !a.remoteExecGetSpec(event, &out) {
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t.Fatalf("bad")
}
if !reflect.DeepEqual(spec, &out) {
t.Fatalf("bad spec")
}
}
func TestRemoteExecWrites(t *testing.T) {
t.Parallel()
testRemoteExecWrites(t, nil)
}
func TestRemoteExecWrites_ACLToken(t *testing.T) {
t.Parallel()
cfg := TestConfig()
cfg.ACLDatacenter = "dc1"
cfg.ACLToken = "root"
cfg.ACLDefaultPolicy = "deny"
testRemoteExecWrites(t, cfg)
}
func testRemoteExecWrites(t *testing.T, c *Config) {
a := NewTestAgent(t.Name(), nil)
defer a.Shutdown()
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event := &remoteExecEvent{
Prefix: "_rexec",
Session: makeRexecSession(t, a.Agent),
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}
defer destroySession(t, a.Agent, event.Session)
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if !a.remoteExecWriteAck(event) {
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t.Fatalf("bad")
}
output := []byte("testing")
if !a.remoteExecWriteOutput(event, 0, output) {
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t.Fatalf("bad")
}
if !a.remoteExecWriteOutput(event, 10, output) {
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t.Fatalf("bad")
}
exitCode := 1
if !a.remoteExecWriteExitCode(event, &exitCode) {
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t.Fatalf("bad")
}
key := "_rexec/" + event.Session + "/" + a.Config.NodeName + "/ack"
d := getKV(t, a.Agent, key)
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if d == nil || d.Session != event.Session {
t.Fatalf("bad ack: %#v", d)
}
key = "_rexec/" + event.Session + "/" + a.Config.NodeName + "/out/00000"
d = getKV(t, a.Agent, key)
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if d == nil || d.Session != event.Session || !bytes.Equal(d.Value, output) {
t.Fatalf("bad output: %#v", d)
}
key = "_rexec/" + event.Session + "/" + a.Config.NodeName + "/out/0000a"
d = getKV(t, a.Agent, key)
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if d == nil || d.Session != event.Session || !bytes.Equal(d.Value, output) {
t.Fatalf("bad output: %#v", d)
}
key = "_rexec/" + event.Session + "/" + a.Config.NodeName + "/exit"
d = getKV(t, a.Agent, key)
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if d == nil || d.Session != event.Session || string(d.Value) != "1" {
t.Fatalf("bad output: %#v", d)
}
}
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func testHandleRemoteExec(t *testing.T, command string, expectedSubstring string, expectedReturnCode string) {
a := NewTestAgent(t.Name(), nil)
defer a.Shutdown()
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event := &remoteExecEvent{
Prefix: "_rexec",
Session: makeRexecSession(t, a.Agent),
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}
defer destroySession(t, a.Agent, event.Session)
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spec := &remoteExecSpec{
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Command: command,
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Wait: time.Second,
}
buf, err := json.Marshal(spec)
if err != nil {
t.Fatalf("err: %v", err)
}
key := "_rexec/" + event.Session + "/job"
setKV(t, a.Agent, key, buf)
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buf, err = json.Marshal(event)
if err != nil {
t.Fatalf("err: %v", err)
}
msg := &UserEvent{
ID: generateUUID(),
Payload: buf,
}
// Handle the event...
a.handleRemoteExec(msg)
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// Verify we have an ack
key = "_rexec/" + event.Session + "/" + a.Config.NodeName + "/ack"
d := getKV(t, a.Agent, key)
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if d == nil || d.Session != event.Session {
t.Fatalf("bad ack: %#v", d)
}
// Verify we have output
key = "_rexec/" + event.Session + "/" + a.Config.NodeName + "/out/00000"
d = getKV(t, a.Agent, key)
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if d == nil || d.Session != event.Session ||
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!bytes.Contains(d.Value, []byte(expectedSubstring)) {
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t.Fatalf("bad output: %#v", d)
}
// Verify we have an exit code
key = "_rexec/" + event.Session + "/" + a.Config.NodeName + "/exit"
d = getKV(t, a.Agent, key)
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if d == nil || d.Session != event.Session || string(d.Value) != expectedReturnCode {
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t.Fatalf("bad output: %#v", d)
}
}
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func TestHandleRemoteExec(t *testing.T) {
t.Parallel()
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testHandleRemoteExec(t, "uptime", "load", "0")
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}
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func TestHandleRemoteExecFailed(t *testing.T) {
t.Parallel()
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testHandleRemoteExec(t, "echo failing;exit 2", "failing", "2")
}
func makeRexecSession(t *testing.T, a *Agent) string {
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args := structs.SessionRequest{
Datacenter: a.config.Datacenter,
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Op: structs.SessionCreate,
Session: structs.Session{
Node: a.config.NodeName,
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LockDelay: 15 * time.Second,
},
}
var out string
if err := a.RPC("Session.Apply", &args, &out); err != nil {
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t.Fatalf("err: %v", err)
}
return out
}
func destroySession(t *testing.T, a *Agent, session string) {
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args := structs.SessionRequest{
Datacenter: a.config.Datacenter,
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Op: structs.SessionDestroy,
Session: structs.Session{
ID: session,
},
}
var out string
if err := a.RPC("Session.Apply", &args, &out); err != nil {
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t.Fatalf("err: %v", err)
}
}
func setKV(t *testing.T, a *Agent, key string, val []byte) {
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write := structs.KVSRequest{
Datacenter: a.config.Datacenter,
Op: api.KVSet,
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DirEnt: structs.DirEntry{
Key: key,
Value: val,
},
}
write.Token = a.config.ACLToken
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var success bool
if err := a.RPC("KVS.Apply", &write, &success); err != nil {
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t.Fatalf("err: %v", err)
}
}
func getKV(t *testing.T, a *Agent, key string) *structs.DirEntry {
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req := structs.KeyRequest{
Datacenter: a.config.Datacenter,
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Key: key,
}
req.Token = a.config.ACLToken
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var out structs.IndexedDirEntries
if err := a.RPC("KVS.Get", &req, &out); err != nil {
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t.Fatalf("err: %v", err)
}
if len(out.Entries) > 0 {
return out.Entries[0]
}
return nil
}