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Copy pathdebug.go
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163 lines (150 loc) · 4.08 KB
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// Copyright (c) 2015-2023 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package grid
import (
"context"
"fmt"
"net"
"net/http"
"net/http/httptest"
"sync"
"time"
"github.com/minio/mux"
)
//go:generate stringer -type=debugMsg $GOFILE
// debugMsg is a debug message for testing purposes.
// may only be used for tests.
type debugMsg int
const (
debugPrint = false
debugReqs = false
)
const (
debugShutdown debugMsg = iota
debugKillInbound
debugKillOutbound
debugWaitForExit
debugSetConnPingDuration
debugSetClientPingDuration
debugAddToDeadline
)
// TestGrid contains a grid of servers for testing purposes.
type TestGrid struct {
Servers []*httptest.Server
Listeners []net.Listener
Managers []*Manager
Mux []*mux.Router
Hosts []string
cleanupOnce sync.Once
cancel context.CancelFunc
}
// SetupTestGrid creates a new grid for testing purposes.
// Select the number of hosts to create.
// Call (TestGrid).Cleanup() when done.
func SetupTestGrid(n int) (*TestGrid, error) {
hosts, listeners, err := getHosts(n)
if err != nil {
return nil, err
}
dialer := &net.Dialer{
Timeout: 5 * time.Second,
}
var res TestGrid
res.Hosts = hosts
ready := make(chan struct{})
ctx, cancel := context.WithCancel(context.Background())
res.cancel = cancel
for i, host := range hosts {
manager, err := NewManager(ctx, ManagerOptions{
Dialer: dialer.DialContext,
Local: host,
Hosts: hosts,
AuthRequest: func(r *http.Request) error {
return nil
},
AddAuth: func(aud string) string { return aud },
BlockConnect: ready,
})
if err != nil {
return nil, err
}
m := mux.NewRouter()
m.Handle(RoutePath, manager.Handler())
res.Managers = append(res.Managers, manager)
res.Servers = append(res.Servers, startHTTPServer(listeners[i], m))
res.Listeners = append(res.Listeners, listeners[i])
res.Mux = append(res.Mux, m)
}
close(ready)
for _, m := range res.Managers {
for _, remote := range m.Targets() {
if err := m.Connection(remote).WaitForConnect(ctx); err != nil {
return nil, err
}
}
}
return &res, nil
}
// Cleanup will clean up the test grid.
func (t *TestGrid) Cleanup() {
t.cancel()
t.cleanupOnce.Do(func() {
for _, manager := range t.Managers {
manager.debugMsg(debugShutdown)
}
for _, server := range t.Servers {
server.Close()
}
for _, listener := range t.Listeners {
listener.Close()
}
})
}
// WaitAllConnect will wait for all connections to be established.
func (t *TestGrid) WaitAllConnect(ctx context.Context) {
for _, manager := range t.Managers {
for _, remote := range manager.Targets() {
if manager.HostName() == remote {
continue
}
if err := manager.Connection(remote).WaitForConnect(ctx); err != nil {
panic(err)
}
}
}
}
func getHosts(n int) (hosts []string, listeners []net.Listener, err error) {
for i := 0; i < n; i++ {
l, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
if l, err = net.Listen("tcp6", "[::1]:0"); err != nil {
return nil, nil, fmt.Errorf("httptest: failed to listen on a port: %v", err)
}
}
addr := l.Addr()
hosts = append(hosts, "http://"+addr.String())
listeners = append(listeners, l)
}
return
}
func startHTTPServer(listener net.Listener, handler http.Handler) (server *httptest.Server) {
server = httptest.NewUnstartedServer(handler)
server.Config.Addr = listener.Addr().String()
server.Listener = listener
server.Start()
return server
}