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package rubyserver
import (
"testing"
"time"
"github.com/stretchr/testify/require"
"gitlab.com/gitlab-org/gitaly/internal/config"
"gitlab.com/gitlab-org/gitaly/internal/supervisor"
)
func TestWorker(t *testing.T) {
restartDelay := 100 * time.Millisecond
defer func(old time.Duration) {
config.Config.Ruby.RestartDelay = old
}(config.Config.Ruby.RestartDelay)
config.Config.Ruby.RestartDelay = restartDelay
events := make(chan supervisor.Event)
addr := "the address"
w := newWorker(&supervisor.Process{Name: "testing"}, addr, events)
mustIgnore := func(e supervisor.Event) {
nothing := ¬hingBalancer{t}
w.balancerUpdate <- nothing
t.Logf("sending Event %+v, expect nothing to happen", e)
events <- e
// This second balancer update is used to synchronize with the monitor
// goroutine. When the channel send finishes, we know the event we sent
// before must have been processed.
w.balancerUpdate <- nothing
}
mustAdd := func(e supervisor.Event) {
add := newAdd(t, addr)
w.balancerUpdate <- add
t.Logf("sending Event %+v, expect balancer add", e)
events <- e
add.wait()
}
mustRemove := func(e supervisor.Event) {
remove := newRemove(t, addr)
w.balancerUpdate <- remove
t.Logf("sending Event %+v, expect balancer remove", e)
events <- e
remove.wait()
}
firstPid := 123
mustAdd(upEvent(firstPid))
t.Log("ignore repeated up event")
mustIgnore(upEvent(firstPid))
t.Log("send mem high events but too fast to trigger restart")
for i := 0; i < 5; i++ {
mustIgnore(memHighEvent(firstPid))
}
t.Log("mem low resets mem high counter")
mustIgnore(memLowEvent(firstPid))
t.Log("send mem high events but too fast to trigger restart")
for i := 0; i < 5; i++ {
mustIgnore(memHighEvent(firstPid))
}
time.Sleep(2 * restartDelay)
t.Log("this mem high should push us over the threshold")
mustRemove(memHighEvent(firstPid))
secondPid := 456
t.Log("time for a new PID")
mustAdd(upEvent(secondPid))
t.Log("ignore mem high events for the previous pid")
mustIgnore(memHighEvent(firstPid))
time.Sleep(2 * restartDelay)
mustIgnore(memHighEvent(firstPid))
t.Log("start high memory timer")
mustIgnore(memHighEvent(secondPid))
t.Log("ignore mem low event for wrong pid")
mustIgnore(memLowEvent(firstPid))
t.Log("send mem high count over the threshold")
time.Sleep(2 * restartDelay)
mustRemove(memHighEvent(secondPid))
}
func waitFail(t *testing.T, done chan struct{}) {
select {
case <-time.After(1 * time.Second):
t.Fatal("timeout waiting for balancer method call")
case <-done:
}
}
func upEvent(pid int) supervisor.Event {
return supervisor.Event{Type: supervisor.Up, Pid: pid}
}
func memHighEvent(pid int) supervisor.Event {
return supervisor.Event{Type: supervisor.MemoryHigh, Pid: pid}
}
func memLowEvent(pid int) supervisor.Event {
return supervisor.Event{Type: supervisor.MemoryLow, Pid: pid}
}
func newAdd(t *testing.T, addr string) *addBalancer {
return &addBalancer{
t: t,
addr: addr,
done: make(chan struct{}),
}
}
type addBalancer struct {
addr string
t *testing.T
done chan struct{}
}
func (ab *addBalancer) RemoveAddress(string) bool {
ab.t.Fatal("unexpected RemoveAddress call")
return false
}
func (ab *addBalancer) AddAddress(s string) {
require.Equal(ab.t, ab.addr, s, "addBalancer expected AddAddress argument")
close(ab.done)
}
func (ab *addBalancer) wait() {
waitFail(ab.t, ab.done)
}
func newRemove(t *testing.T, addr string) *removeBalancer {
return &removeBalancer{
t: t,
addr: addr,
done: make(chan struct{}),
}
}
type removeBalancer struct {
addr string
t *testing.T
done chan struct{}
}
func (rb *removeBalancer) RemoveAddress(s string) bool {
require.Equal(rb.t, rb.addr, s, "removeBalancer expected RemoveAddress argument")
close(rb.done)
return false
}
func (rb *removeBalancer) AddAddress(s string) {
rb.t.Fatal("unexpected AddAddress call")
}
func (rb *removeBalancer) wait() {
waitFail(rb.t, rb.done)
}
type nothingBalancer struct {
t *testing.T
}
func (nb *nothingBalancer) RemoveAddress(s string) bool {
nb.t.Fatal("unexpected RemoveAddress call")
return false
}
func (nb *nothingBalancer) AddAddress(s string) {
nb.t.Fatal("unexpected AddAddress call")
}
|
