Repository navigation
Expand file tree
/
Copy pathops.go
More file actions
154 lines (125 loc) · 4.61 KB
/
Copy pathops.go
File metadata and controls
154 lines (125 loc) · 4.61 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
// Copyright 2016 VMware, Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"errors"
"fmt"
"io"
"os"
"strings"
"syscall"
"time"
log "github.com/Sirupsen/logrus"
"github.com/docker/libnetwork/iptables"
"github.com/vishvananda/netlink"
"github.com/vmware/vic/lib/pprof"
"github.com/vmware/vic/lib/tether"
"github.com/vmware/vic/pkg/dio"
"github.com/vmware/vic/pkg/trace"
)
// pathPrefix is present to allow the various files referenced by tether to be placed
// in specific directories, primarily for testing.
var pathPrefix string
const (
logDir = "var/log/vic"
initLog = "init.log"
publicIfaceName = "public"
)
type operations struct {
tether.BaseOperations
}
func (t *operations) Setup(sink tether.Config) error {
if err := t.BaseOperations.Setup(sink); err != nil {
return err
}
return pprof.StartPprof("vch-init", pprof.VCHInitPort)
}
func (t *operations) Cleanup() error {
return t.BaseOperations.Cleanup()
}
// HandleSessionExit controls the behaviour on session exit - for the tether if the session exiting
// is the primary session (i.e. SessionID matches ExecutorID) then we exit everything.
func (t *operations) HandleSessionExit(config *tether.ExecutorConfig, session *tether.SessionConfig) func() {
defer trace.End(trace.Begin(""))
// trigger a reload to
8000
force relaunch
return func() {
// If executor debug is greater than 1 then suppress the relaunch but leave the executor up
// for diagnostics
if config.DebugLevel > 2 {
log.Warnf("Debug is set to %d so squashing relaunch of exited process", config.DebugLevel)
return
}
// incredibly basic throttle
time.Sleep(3 * time.Second)
tthr.Reload()
log.Info("Triggered reload")
}
}
func (t *operations) SetHostname(name string, aliases ...string) error {
// switch the names around so we get the pretty name and not the ID
return t.BaseOperations.SetHostname(aliases[0])
}
func (t *operations) SetupFirewall() error {
// get the public interface name
l, err := netlink.LinkByName(publicIfaceName)
if l == nil {
l, err = netlink.LinkByAlias(publicIfaceName)
if l == nil {
return fmt.Errorf("could not find interface: %s", publicIfaceName)
}
}
_, err = iptables.Raw(string(iptables.Append), "FORWARD", "-i", "bridge", "-o", l.Attrs().Name, "-j", "ACCEPT")
return err
}
func (t *operations) Apply(endpoint *tether.NetworkEndpoint) error {
return t.BaseOperations.Apply(endpoint)
}
// Log will redirect logging to both a file on disk and to stdout for the process
func (t *operations) Log() (io.Writer, error) {
defer trace.End(trace.Begin("operations.Log"))
// make the logging directory
os.MkdirAll(fmt.Sprintf("%s%c%s", pathPrefix, os.PathSeparator, logDir), 0777)
logPath := strings.Join([]string{pathPrefix, logDir, initLog}, string(os.PathSeparator))
log.Infof("opening %s for debug log", logPath)
out, err := os.OpenFile(logPath, os.O_RDWR|os.O_CREATE|os.O_APPEND|os.O_SYNC|syscall.O_NOCTTY, 0777)
if err != nil {
detail := fmt.Sprintf("failed to open file port for debug log: %s", err)
log.Error(detail)
return nil, errors.New(detail)
}
return io.MultiWriter(out, os.Stdout), nil
}
// sessionLogWriter returns a writer that will persist the session output
func (t *operations) SessionLog(session *tether.SessionConfig) (dio.DynamicMultiWriter, dio.DynamicMultiWriter, error) {
defer trace.End(trace.Begin("configure session log writer"))
name := session.ID
if name == "" {
name = session.Name
}
logPath := strings.Join([]string{pathPrefix, logDir, name + ".log"}, string(os.PathSeparator))
// open SttyS2 for session logging
log.Infof("opening %s for session logging", logPath)
f, err := os.OpenFile(logPath, os.O_RDWR|os.O_CREATE|os.O_APPEND|os.O_SYNC|syscall.O_NOCTTY, 0777)
if err != nil {
detail := fmt.Sprintf("failed to open file for session log: %s", err)
log.Error(detail)
return nil, nil, errors.New(detail)
}
// use multi-writer so it goes to both screen and session log
if debugLevel > 0 {
return dio.MultiWriter(f, os.Stdout), dio.MultiWriter(f, os.Stderr), nil
}
// only duplicate stderr
return dio.MultiWriter(f), dio.MultiWriter(f), nil
}