322 lines
10 KiB
Go
322 lines
10 KiB
Go
package consul
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/hashicorp/consul/api"
|
|
"github.com/hashicorp/nomad/helper/testlog"
|
|
"github.com/hashicorp/nomad/nomad/structs"
|
|
)
|
|
|
|
// checkRestartRecord is used by a testFakeCtx to record when restarts occur
|
|
// due to a watched check.
|
|
type checkRestartRecord struct {
|
|
timestamp time.Time
|
|
source string
|
|
reason string
|
|
failure bool
|
|
}
|
|
|
|
// fakeCheckRestarter is a test implementation of TaskRestarter.
|
|
type fakeCheckRestarter struct {
|
|
// restarts is a slice of all of the restarts triggered by the checkWatcher
|
|
restarts []checkRestartRecord
|
|
|
|
// need the checkWatcher to re-Watch restarted tasks like TaskRunner
|
|
watcher *checkWatcher
|
|
|
|
// check to re-Watch on restarts
|
|
check *structs.ServiceCheck
|
|
allocID string
|
|
taskName string
|
|
checkName string
|
|
}
|
|
|
|
// newFakeCheckRestart creates a new TaskRestarter. It needs all of the
|
|
// parameters checkWatcher.Watch expects.
|
|
func newFakeCheckRestarter(w *checkWatcher, allocID, taskName, checkName string, c *structs.ServiceCheck) *fakeCheckRestarter {
|
|
return &fakeCheckRestarter{
|
|
watcher: w,
|
|
check: c,
|
|
allocID: allocID,
|
|
taskName: taskName,
|
|
checkName: checkName,
|
|
}
|
|
}
|
|
|
|
// Restart implements part of the TaskRestarter interface needed for check
|
|
// watching and is normally fulfilled by a TaskRunner.
|
|
//
|
|
// Restarts are recorded in the []restarts field and re-Watch the check.
|
|
func (c *fakeCheckRestarter) Restart(source, reason string, failure bool) {
|
|
c.restarts = append(c.restarts, checkRestartRecord{time.Now(), source, reason, failure})
|
|
|
|
// Re-Watch the check just like TaskRunner
|
|
c.watcher.Watch(c.allocID, c.taskName, c.checkName, c.check, c)
|
|
}
|
|
|
|
// String for debugging
|
|
func (c *fakeCheckRestarter) String() string {
|
|
s := fmt.Sprintf("%s %s %s restarts:\n", c.allocID, c.taskName, c.checkName)
|
|
for _, r := range c.restarts {
|
|
s += fmt.Sprintf("%s - %s: %s (failure: %t)\n", r.timestamp, r.source, r.reason, r.failure)
|
|
}
|
|
return s
|
|
}
|
|
|
|
// checkResponse is a response returned by the fakeChecksAPI after the given
|
|
// time.
|
|
type checkResponse struct {
|
|
at time.Time
|
|
id string
|
|
status string
|
|
}
|
|
|
|
// fakeChecksAPI implements the Checks() method for testing Consul.
|
|
type fakeChecksAPI struct {
|
|
// responses is a map of check ids to their status at a particular
|
|
// time. checkResponses must be in chronological order.
|
|
responses map[string][]checkResponse
|
|
}
|
|
|
|
func newFakeChecksAPI() *fakeChecksAPI {
|
|
return &fakeChecksAPI{responses: make(map[string][]checkResponse)}
|
|
}
|
|
|
|
// add a new check status to Consul at the given time.
|
|
func (c *fakeChecksAPI) add(id, status string, at time.Time) {
|
|
c.responses[id] = append(c.responses[id], checkResponse{at, id, status})
|
|
}
|
|
|
|
func (c *fakeChecksAPI) Checks() (map[string]*api.AgentCheck, error) {
|
|
now := time.Now()
|
|
result := make(map[string]*api.AgentCheck, len(c.responses))
|
|
|
|
// Use the latest response for each check
|
|
for k, vs := range c.responses {
|
|
for _, v := range vs {
|
|
if v.at.After(now) {
|
|
break
|
|
}
|
|
result[k] = &api.AgentCheck{
|
|
CheckID: k,
|
|
Name: k,
|
|
Status: v.status,
|
|
}
|
|
}
|
|
}
|
|
|
|
return result, nil
|
|
}
|
|
|
|
// testWatcherSetup sets up a fakeChecksAPI and a real checkWatcher with a test
|
|
// logger and faster poll frequency.
|
|
func testWatcherSetup(t *testing.T) (*fakeChecksAPI, *checkWatcher) {
|
|
fakeAPI := newFakeChecksAPI()
|
|
cw := newCheckWatcher(testlog.HCLogger(t), fakeAPI)
|
|
cw.pollFreq = 10 * time.Millisecond
|
|
return fakeAPI, cw
|
|
}
|
|
|
|
func testCheck() *structs.ServiceCheck {
|
|
return &structs.ServiceCheck{
|
|
Name: "testcheck",
|
|
Interval: 100 * time.Millisecond,
|
|
Timeout: 100 * time.Millisecond,
|
|
CheckRestart: &structs.CheckRestart{
|
|
Limit: 3,
|
|
Grace: 100 * time.Millisecond,
|
|
IgnoreWarnings: false,
|
|
},
|
|
}
|
|
}
|
|
|
|
// TestCheckWatcher_Skip asserts unwatched checks are ignored.
|
|
func TestCheckWatcher_Skip(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a check with restarting disabled
|
|
check := testCheck()
|
|
check.CheckRestart = nil
|
|
|
|
cw := newCheckWatcher(testlog.HCLogger(t), newFakeChecksAPI())
|
|
restarter1 := newFakeCheckRestarter(cw, "testalloc1", "testtask1", "testcheck1", check)
|
|
cw.Watch("testalloc1", "testtask1", "testcheck1", check, restarter1)
|
|
|
|
// Check should have been dropped as it's not watched
|
|
if n := len(cw.checkUpdateCh); n != 0 {
|
|
t.Fatalf("expected 0 checks to be enqueued for watching but found %d", n)
|
|
}
|
|
}
|
|
|
|
// TestCheckWatcher_Healthy asserts healthy tasks are not restarted.
|
|
func TestCheckWatcher_Healthy(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
fakeAPI, cw := testWatcherSetup(t)
|
|
|
|
check1 := testCheck()
|
|
restarter1 := newFakeCheckRestarter(cw, "testalloc1", "testtask1", "testcheck1", check1)
|
|
cw.Watch("testalloc1", "testtask1", "testcheck1", check1, restarter1)
|
|
|
|
check2 := testCheck()
|
|
check2.CheckRestart.Limit = 1
|
|
check2.CheckRestart.Grace = 0
|
|
restarter2 := newFakeCheckRestarter(cw, "testalloc2", "testtask2", "testcheck2", check2)
|
|
cw.Watch("testalloc2", "testtask2", "testcheck2", check2, restarter2)
|
|
|
|
// Make both checks healthy from the beginning
|
|
fakeAPI.add("testcheck1", "passing", time.Time{})
|
|
fakeAPI.add("testcheck2", "passing", time.Time{})
|
|
|
|
// Run
|
|
ctx, cancel := context.WithTimeout(context.Background(), 500*time.Millisecond)
|
|
defer cancel()
|
|
cw.Run(ctx)
|
|
|
|
// Ensure restart was never called
|
|
if n := len(restarter1.restarts); n > 0 {
|
|
t.Errorf("expected check 1 to not be restarted but found %d:\n%s", n, restarter1)
|
|
}
|
|
if n := len(restarter2.restarts); n > 0 {
|
|
t.Errorf("expected check 2 to not be restarted but found %d:\n%s", n, restarter2)
|
|
}
|
|
}
|
|
|
|
// TestCheckWatcher_HealthyWarning asserts checks in warning with
|
|
// ignore_warnings=true do not restart tasks.
|
|
func TestCheckWatcher_HealthyWarning(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
fakeAPI, cw := testWatcherSetup(t)
|
|
|
|
check1 := testCheck()
|
|
check1.CheckRestart.Limit = 1
|
|
check1.CheckRestart.Grace = 0
|
|
check1.CheckRestart.IgnoreWarnings = true
|
|
restarter1 := newFakeCheckRestarter(cw, "testalloc1", "testtask1", "testcheck1", check1)
|
|
cw.Watch("testalloc1", "testtask1", "testcheck1", check1, restarter1)
|
|
|
|
// Check is always in warning but that's ok
|
|
fakeAPI.add("testcheck1", "warning", time.Time{})
|
|
|
|
// Run
|
|
ctx, cancel := context.WithTimeout(context.Background(), 200*time.Millisecond)
|
|
defer cancel()
|
|
cw.Run(ctx)
|
|
|
|
// Ensure restart was never called on check 1
|
|
if n := len(restarter1.restarts); n > 0 {
|
|
t.Errorf("expected check 1 to not be restarted but found %d", n)
|
|
}
|
|
}
|
|
|
|
// TestCheckWatcher_Flapping asserts checks that flap from healthy to unhealthy
|
|
// before the unhealthy limit is reached do not restart tasks.
|
|
func TestCheckWatcher_Flapping(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
fakeAPI, cw := testWatcherSetup(t)
|
|
|
|
check1 := testCheck()
|
|
check1.CheckRestart.Grace = 0
|
|
restarter1 := newFakeCheckRestarter(cw, "testalloc1", "testtask1", "testcheck1", check1)
|
|
cw.Watch("testalloc1", "testtask1", "testcheck1", check1, restarter1)
|
|
|
|
// Check flaps and is never failing for the full 200ms needed to restart
|
|
now := time.Now()
|
|
fakeAPI.add("testcheck1", "passing", now)
|
|
fakeAPI.add("testcheck1", "critical", now.Add(100*time.Millisecond))
|
|
fakeAPI.add("testcheck1", "passing", now.Add(250*time.Millisecond))
|
|
fakeAPI.add("testcheck1", "critical", now.Add(300*time.Millisecond))
|
|
fakeAPI.add("testcheck1", "passing", now.Add(450*time.Millisecond))
|
|
|
|
ctx, cancel := context.WithTimeout(context.Background(), 600*time.Millisecond)
|
|
defer cancel()
|
|
cw.Run(ctx)
|
|
|
|
// Ensure restart was never called on check 1
|
|
if n := len(restarter1.restarts); n > 0 {
|
|
t.Errorf("expected check 1 to not be restarted but found %d\n%s", n, restarter1)
|
|
}
|
|
}
|
|
|
|
// TestCheckWatcher_Unwatch asserts unwatching checks prevents restarts.
|
|
func TestCheckWatcher_Unwatch(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
fakeAPI, cw := testWatcherSetup(t)
|
|
|
|
// Unwatch immediately
|
|
check1 := testCheck()
|
|
check1.CheckRestart.Limit = 1
|
|
check1.CheckRestart.Grace = 100 * time.Millisecond
|
|
restarter1 := newFakeCheckRestarter(cw, "testalloc1", "testtask1", "testcheck1", check1)
|
|
cw.Watch("testalloc1", "testtask1", "testcheck1", check1, restarter1)
|
|
cw.Unwatch("testcheck1")
|
|
|
|
// Always failing
|
|
fakeAPI.add("testcheck1", "critical", time.Time{})
|
|
|
|
ctx, cancel := context.WithTimeout(context.Background(), 300*time.Millisecond)
|
|
defer cancel()
|
|
cw.Run(ctx)
|
|
|
|
// Ensure restart was never called on check 1
|
|
if n := len(restarter1.restarts); n > 0 {
|
|
t.Errorf("expected check 1 to not be restarted but found %d\n%s", n, restarter1)
|
|
}
|
|
}
|
|
|
|
// TestCheckWatcher_MultipleChecks asserts that when there are multiple checks
|
|
// for a single task, all checks should be removed when any of them restart the
|
|
// task to avoid multiple restarts.
|
|
func TestCheckWatcher_MultipleChecks(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
fakeAPI, cw := testWatcherSetup(t)
|
|
|
|
check1 := testCheck()
|
|
check1.CheckRestart.Limit = 1
|
|
restarter1 := newFakeCheckRestarter(cw, "testalloc1", "testtask1", "testcheck1", check1)
|
|
cw.Watch("testalloc1", "testtask1", "testcheck1", check1, restarter1)
|
|
|
|
check2 := testCheck()
|
|
check2.CheckRestart.Limit = 1
|
|
restarter2 := newFakeCheckRestarter(cw, "testalloc1", "testtask1", "testcheck2", check2)
|
|
cw.Watch("testalloc1", "testtask1", "testcheck2", check2, restarter2)
|
|
|
|
check3 := testCheck()
|
|
check3.CheckRestart.Limit = 1
|
|
restarter3 := newFakeCheckRestarter(cw, "testalloc1", "testtask1", "testcheck3", check3)
|
|
cw.Watch("testalloc1", "testtask1", "testcheck3", check3, restarter3)
|
|
|
|
// check 2 & 3 fail long enough to cause 1 restart, but only 1 should restart
|
|
now := time.Now()
|
|
fakeAPI.add("testcheck1", "critical", now)
|
|
fakeAPI.add("testcheck1", "passing", now.Add(150*time.Millisecond))
|
|
fakeAPI.add("testcheck2", "critical", now)
|
|
fakeAPI.add("testcheck2", "passing", now.Add(150*time.Millisecond))
|
|
fakeAPI.add("testcheck3", "passing", time.Time{})
|
|
|
|
// Run
|
|
ctx, cancel := context.WithTimeout(context.Background(), 500*time.Millisecond)
|
|
defer cancel()
|
|
cw.Run(ctx)
|
|
|
|
// Ensure that restart was only called once on check 1 or 2. Since
|
|
// checks are in a map it's random which check triggers the restart
|
|
// first.
|
|
if n := len(restarter1.restarts) + len(restarter2.restarts); n != 1 {
|
|
t.Errorf("expected check 1 & 2 to be restarted 1 time but found %d\ncheck 1:\n%s\ncheck 2:%s",
|
|
n, restarter1, restarter2)
|
|
}
|
|
|
|
if n := len(restarter3.restarts); n != 0 {
|
|
t.Errorf("expected check 3 to not be restarted but found %d:\n%s", n, restarter3)
|
|
}
|
|
}
|