forked from kubernetes/minikube
/
none.go
232 lines (200 loc) · 5.48 KB
/
none.go
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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
/*
Copyright 2016 The Kubernetes Authors 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 none
import (
"bytes"
"fmt"
"os/exec"
"strings"
"github.com/golang/glog"
"github.com/docker/machine/libmachine/drivers"
"github.com/docker/machine/libmachine/state"
"github.com/pkg/errors"
"k8s.io/apimachinery/pkg/util/net"
pkgdrivers "k8s.io/minikube/pkg/drivers"
"k8s.io/minikube/pkg/minikube/constants"
)
const driverName = "none"
const dockerstopcmd = `docker kill $(docker ps -a --filter="name=k8s_" --format="{{.ID}}")`
var dockerkillcmd = fmt.Sprintf(`docker rm $(%s)`, dockerstopcmd)
// none Driver is a driver designed to run localkube w/o a VM
type Driver struct {
*drivers.BaseDriver
*pkgdrivers.CommonDriver
URL string
}
func NewDriver(hostName, storePath string) *Driver {
return &Driver{
BaseDriver: &drivers.BaseDriver{
MachineName: hostName,
StorePath: storePath,
},
}
}
// PreCreateCheck checks for correct priviledges and dependencies
func (d *Driver) PreCreateCheck() error {
// check that docker is on path
_, err := exec.LookPath("docker")
if err != nil {
return errors.Wrap(err, "docker cannot be found on the path for this machine. "+
"A docker installation is a requirement for using the none driver")
}
return nil
}
func (d *Driver) Create() error {
// creation for the none driver is handled by commands.go
return nil
}
// DriverName returns the name of the driver
func (d *Driver) DriverName() string {
return driverName
}
func (d *Driver) GetIP() (string, error) {
ip, err := net.ChooseBindAddress(nil)
if err != nil {
return "", err
}
return ip.String(), nil
}
func (d *Driver) GetSSHHostname() (string, error) {
return "", fmt.Errorf("driver does not support ssh commands")
}
func (d *Driver) GetSSHPort() (int, error) {
return 0, fmt.Errorf("driver does not support ssh commands")
}
func (d *Driver) GetURL() (string, error) {
ip, err := d.GetIP()
if err != nil {
return "", err
}
return fmt.Sprintf("tcp://%s:2376", ip), nil
}
func (d *Driver) GetState() (state.State, error) {
var statuscmd = fmt.Sprintf("if [[ `systemctl` =~ -\\.mount ]] &>/dev/null; "+`then
sudo systemctl is-active kubelet localkube &>/dev/null && echo "Running" || echo "Stopped"
else
if ps $(cat %s) &>/dev/null; then
echo "Running"
else
echo "Stopped"
fi
fi
`, constants.LocalkubePIDPath)
out, err := runCommand(statuscmd, true)
if err != nil {
return state.None, err
}
s := strings.TrimSpace(out)
if state.Running.String() == s {
return state.Running, nil
} else if state.Stopped.String() == s {
return state.Stopped, nil
} else {
return state.None, fmt.Errorf("Error: Unrecognize output from GetLocalkubeStatus: %s", s)
}
}
func (d *Driver) Kill() error {
for _, cmdStr := range [][]string{
{"systemctl", "stop", "localkube.service"},
{"rm", "-rf", "/var/lib/localkube"},
} {
cmd := exec.Command("sudo", cmdStr...)
if out, err := cmd.CombinedOutput(); err != nil {
glog.Warningf("Error %s running command: %s. Output: %s", err, cmdStr, string(out))
}
}
return nil
}
func (d *Driver) Remove() error {
rmCmd := `for svc in "localkube" "kubelet"; do
sudo systemctl stop "$svc".service
done
sudo rm -rf /data
sudo rm -rf /etc/kubernetes/manifests
sudo rm -rf /var/lib/localkube || true`
for _, cmdStr := range []string{rmCmd, dockerkillcmd} {
if out, err := runCommand(cmdStr, true); err != nil {
glog.Warningf("Error %s running command: %s, Output: %s", err, cmdStr, out)
}
}
return nil
}
func (d *Driver) Restart() error {
restartCmd := `for svc in "localkube" "kubelet"; do
if systemctl is-active $svc.service; then
sudo systemctl restart "$svc".service
fi
done`
cmd := exec.Command(restartCmd)
if err := cmd.Start(); err != nil {
return err
}
return nil
}
func (d *Driver) Start() error {
var err error
d.IPAddress, err = d.GetIP()
if err != nil {
return err
}
d.URL, err = d.GetURL()
if err != nil {
return err
}
return nil
}
func (d *Driver) Stop() error {
var stopcmd = fmt.Sprintf("if [[ `systemctl` =~ -\\.mount ]] &>/dev/null; "+`then
for svc in "localkube" "kubelet"; do
sudo systemctl stop "$svc".service || true
done
else
sudo kill $(cat %s)
fi
`, constants.LocalkubePIDPath)
_, err := runCommand(stopcmd, false)
if err != nil {
return err
}
for {
s, err := d.GetState()
if err != nil {
return err
}
if s != state.Running {
break
}
}
if out, err := runCommand(dockerstopcmd, false); err != nil {
glog.Warningf("Error %s running command %s. Output: %s", err, dockerstopcmd, out)
}
return nil
}
func (d *Driver) RunSSHCommandFromDriver() error {
return fmt.Errorf("driver does not support ssh commands")
}
func runCommand(command string, sudo bool) (string, error) {
cmd := exec.Command("/bin/bash", "-c", command)
if sudo {
cmd = exec.Command("sudo", "/bin/bash", "-c", command)
}
var out bytes.Buffer
var stderr bytes.Buffer
cmd.Stdout = &out
cmd.Stderr = &stderr
err := cmd.Run()
if err != nil {
return "", errors.Wrap(err, stderr.String())
}
return out.String(), nil
}