aboutsummaryrefslogtreecommitdiff
path: root/pkg/machine/ignition.go
blob: 1393189772b2e4b379f0ad008431d3b3d4d6150c (plain)
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
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
// +build amd64 arm64

package machine

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net/url"
	"path/filepath"
)

/*
	If this file gets too nuts, we can perhaps use existing go code
	to create ignition files.  At this point, the file is so simple
	that I chose to use structs and not import any code as I was
	concerned (unsubstantiated) about too much bloat coming in.

	https://github.com/openshift/machine-config-operator/blob/master/pkg/server/server.go
*/

// Convenience function to convert int to ptr
func intToPtr(i int) *int {
	return &i
}

// Convenience function to convert string to ptr
func strToPtr(s string) *string {
	return &s
}

// Convenience function to convert bool to ptr
func boolToPtr(b bool) *bool {
	return &b
}

func getNodeUsr(usrName string) NodeUser {
	return NodeUser{Name: &usrName}
}

func getNodeGrp(grpName string) NodeGroup {
	return NodeGroup{Name: &grpName}
}

type DynamicIgnition struct {
	Name      string
	Key       string
	TimeZone  string
	VMName    string
	WritePath string
}

// NewIgnitionFile
func NewIgnitionFile(ign DynamicIgnition) error {
	if len(ign.Name) < 1 {
		ign.Name = DefaultIgnitionUserName
	}
	ignVersion := Ignition{
		Version: "3.2.0",
	}

	ignPassword := Passwd{
		Users: []PasswdUser{
			{
				Name:              ign.Name,
				SSHAuthorizedKeys: []SSHAuthorizedKey{SSHAuthorizedKey(ign.Key)},
			},
			{
				Name:              "root",
				SSHAuthorizedKeys: []SSHAuthorizedKey{SSHAuthorizedKey(ign.Key)},
			},
		},
	}

	ignStorage := Storage{
		Directories: getDirs(ign.Name),
		Files:       getFiles(ign.Name),
		Links:       getLinks(ign.Name),
	}

	// Add or set the time zone for the machine
	if len(ign.TimeZone) > 0 {
		var (
			err error
			tz  string
		)
		// local means the same as the host
		// lookup where it is pointing to on the host
		if ign.TimeZone == "local" {
			tz, err = getLocalTimeZone()
			if err != nil {
				return err
			}
		} else {
			tz = ign.TimeZone
		}
		tzLink := Link{
			Node: Node{
				Group:     getNodeGrp("root"),
				Path:      "/etc/localtime",
				Overwrite: boolToPtr(false),
				User:      getNodeUsr("root"),
			},
			LinkEmbedded1: LinkEmbedded1{
				Hard:   boolToPtr(false),
				Target: filepath.Join("/usr/share/zoneinfo", tz),
			},
		}
		ignStorage.Links = append(ignStorage.Links, tzLink)
	}

	// ready is a unit file that sets up the virtual serial device
	// where when the VM is done configuring, it will send an ack
	// so a listening host knows it can being interacting with it
	ready := `[Unit]
Requires=dev-virtio\\x2dports-%s.device
After=remove-moby.service sshd.socket sshd.service
OnFailure=emergency.target
OnFailureJobMode=isolate
[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/sh -c '/usr/bin/echo Ready >/dev/%s'
[Install]
RequiredBy=default.target
`
	deMoby := `[Unit]
Description=Remove moby-engine
# Run once for the machine
After=systemd-machine-id-commit.service
Before=zincati.service
ConditionPathExists=!/var/lib/%N.stamp

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/usr/bin/rpm-ostree override remove moby-engine
ExecStart=/usr/bin/rpm-ostree ex apply-live --allow-replacement
ExecStartPost=/bin/touch /var/lib/%N.stamp

[Install]
WantedBy=default.target
 `
	_ = ready
	ignSystemd := Systemd{
		Units: []Unit{
			{
				Enabled: boolToPtr(true),
				Name:    "podman.socket",
			},
			{
				Enabled:  boolToPtr(true),
				Name:     "ready.service",
				Contents: strToPtr(fmt.Sprintf(ready, "vport1p1", "vport1p1")),
			},
			{
				Enabled: boolToPtr(false),
				Name:    "docker.service",
				Mask:    boolToPtr(true),
			},
			{
				Enabled: boolToPtr(false),
				Name:    "docker.socket",
				Mask:    boolToPtr(true),
			},
			{
				Enabled:  boolToPtr(true),
				Name:     "remove-moby.service",
				Contents: &deMoby,
			},
		}}
	ignConfig := Config{
		Ignition: ignVersion,
		Passwd:   ignPassword,
		Storage:  ignStorage,
		Systemd:  ignSystemd,
	}
	b, err := json.Marshal(ignConfig)
	if err != nil {
		return err
	}
	return ioutil.WriteFile(ign.WritePath, b, 0644)
}

func getDirs(usrName string) []Directory {
	// Ignition has a bug/feature? where if you make a series of dirs
	// in one swoop, then the leading dirs are creates as root.
	newDirs := []string{
		"/home/" + usrName + "/.config",
		"/home/" + usrName + "/.config/containers",
		"/home/" + usrName + "/.config/systemd",
		"/home/" + usrName + "/.config/systemd/user",
		"/home/" + usrName + "/.config/systemd/user/default.target.wants",
	}
	var (
		dirs = make([]Directory, len(newDirs))
	)
	for i, d := range newDirs {
		newDir := Directory{
			Node: Node{
				Group: getNodeGrp(usrName),
				Path:  d,
				User:  getNodeUsr(usrName),
			},
			DirectoryEmbedded1: DirectoryEmbedded1{Mode: intToPtr(0755)},
		}
		dirs[i] = newDir
	}

	// Issue #11489: make sure that we can inject a custom registries.conf
	// file on the system level to force a single search registry.
	// The remote client does not yet support prompting for short-name
	// resolution, so we enforce a single search registry (i.e., docker.io)
	// as a workaround.
	dirs = append(dirs, Directory{
		Node: Node{
			Group: getNodeGrp("root"),
			Path:  "/etc/containers/registries.conf.d",
			User:  getNodeUsr("root"),
		},
		DirectoryEmbedded1: DirectoryEmbedded1{Mode: intToPtr(0755)},
	})

	return dirs
}

func getFiles(usrName string) []File {
	var (
		files []File
	)

	lingerExample := `[Unit]
Description=A systemd user unit demo
After=network-online.target
Wants=network-online.target podman.socket
[Service]
ExecStart=/usr/bin/sleep infinity
`
	containers := `[containers]
netns="bridge"
rootless_networking="cni"
`
	rootContainers := `[engine]
machine_enabled=true
`

	// Add a fake systemd service to get the user socket rolling
	files = append(files, File{
		Node: Node{
			Group: getNodeGrp(usrName),
			Path:  "/home/" + usrName + "/.config/systemd/user/linger-example.service",
			User:  getNodeUsr(usrName),
		},
		FileEmbedded1: FileEmbedded1{
			Append: nil,
			Contents: Resource{
				Source: encodeDataURLPtr(lingerExample),
			},
			Mode: intToPtr(0744),
		},
	})

	// Set containers.conf up for core user to use cni networks
	// by default
	files = append(files, File{
		Node: Node{
			Group: getNodeGrp(usrName),
			Path:  "/home/" + usrName + "/.config/containers/containers.conf",
			User:  getNodeUsr(usrName),
		},
		FileEmbedded1: FileEmbedded1{
			Append: nil,
			Contents: Resource{
				Source: encodeDataURLPtr(containers),
			},
			Mode: intToPtr(0744),
		},
	})
	// Add a file into linger
	files = append(files, File{
		Node: Node{
			Group: getNodeGrp(usrName),
			Path:  "/var/lib/systemd/linger/core",
			User:  getNodeUsr(usrName),
		},
		FileEmbedded1: FileEmbedded1{Mode: intToPtr(0644)},
	})

	// Set machine_enabled to true to indicate we're in a VM
	files = append(files, File{
		Node: Node{
			Group: getNodeGrp("root"),
			Path:  "/etc/containers/containers.conf",
			User:  getNodeUsr("root"),
		},
		FileEmbedded1: FileEmbedded1{
			Append: nil,
			Contents: Resource{
				Source: encodeDataURLPtr(rootContainers),
			},
			Mode: intToPtr(0644),
		},
	})

	// Issue #11489: make sure that we can inject a custom registries.conf
	// file on the system level to force a single search registry.
	// The remote client does not yet support prompting for short-name
	// resolution, so we enforce a single search registry (i.e., docker.io)
	// as a workaround.
	files = append(files, File{
		Node: Node{
			Group: getNodeGrp("root"),
			Path:  "/etc/containers/registries.conf.d/999-podman-machine.conf",
			User:  getNodeUsr("root"),
		},
		FileEmbedded1: FileEmbedded1{
			Append: nil,
			Contents: Resource{
				Source: encodeDataURLPtr("unqualified-search-registries=[\"docker.io\"]\n"),
			},
			Mode: intToPtr(0644),
		},
	})

	files = append(files, File{
		Node: Node{
			Path: "/etc/tmpfiles.d/podman-docker.conf",
		},
		FileEmbedded1: FileEmbedded1{
			Append: nil,
			// Create a symlink from the docker socket to the podman socket.
			// Taken from https://github.com/containers/podman/blob/main/contrib/systemd/system/podman-docker.conf
			Contents: Resource{
				Source: encodeDataURLPtr("L+  /run/docker.sock   -    -    -     -   /run/podman/podman.sock\n"),
			},
			Mode: intToPtr(0644),
		},
	})

	setDockerHost := `export DOCKER_HOST="unix://$(podman info -f "{{.Host.RemoteSocket.Path}}")"
`

	files = append(files, File{
		Node: Node{
			Group: getNodeGrp("root"),
			Path:  "/etc/profile.d/docker-host.sh",
			User:  getNodeUsr("root"),
		},
		FileEmbedded1: FileEmbedded1{
			Append: nil,
			Contents: Resource{
				Source: encodeDataURLPtr(setDockerHost),
			},
			Mode: intToPtr(0644),
		},
	})

	return files
}

func getLinks(usrName string) []Link {
	return []Link{{
		Node: Node{
			Group: getNodeGrp(usrName),
			Path:  "/home/" + usrName + "/.config/systemd/user/default.target.wants/linger-example.service",
			User:  getNodeUsr(usrName),
		},
		LinkEmbedded1: LinkEmbedded1{
			Hard:   boolToPtr(false),
			Target: "/home/" + usrName + "/.config/systemd/user/linger-example.service",
		},
	}, {
		Node: Node{
			Group:     getNodeGrp("root"),
			Path:      "/usr/local/bin/docker",
			Overwrite: boolToPtr(true),
			User:      getNodeUsr("root"),
		},
		LinkEmbedded1: LinkEmbedded1{
			Hard:   boolToPtr(false),
			Target: "/usr/bin/podman",
		},
	}}
}

func encodeDataURLPtr(contents string) *string {
	return strToPtr(fmt.Sprintf("data:,%s", url.PathEscape(contents)))
}