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
|
#!/usr/bin/python3
import argparse
import os
import shutil
import subprocess
import sys
import tempfile
import yaml
KERNELS = {
"amd64": "linux-image-amd64",
"arm64": "linux-image-arm64",
"armhf": "linux-image-armmp-lpae",
"i386": "linux-image-686",
"ppc64el": "linux-image-powerpc64le",
}
QEMUS = {
"amd64": "qemu-system-x86_64",
}
class Config:
def __init__(self):
p = argparse.ArgumentParser()
p.add_argument("--dump", action="store_true")
p.add_argument("--vmdb", action="store")
p.add_argument("--tarball-directory", action="store", default=".")
p.add_argument("--debian-release", action="store")
p.add_argument("--grub", action="store", choices=["bios", "uefi", "ieee1275"])
p.add_argument("--mklabel", action="store", choices=["msdos", "gpt"])
p.add_argument("--arch", action="store")
p.add_argument("--boot", action="store_true")
p.add_argument("--maybe-boot", action="store_true")
p.add_argument("--verbose", action="store_true")
args = p.parse_args()
self.dump = args.dump
self.tarball_directory = args.tarball_directory
self.vmdb_filename = args.vmdb
self.vmdb = yaml.safe_load(open(self.vmdb_filename))
self.boot = args.boot
self.maybe_boot = args.maybe_boot
self.verbose = args.verbose
if args.arch:
arch = args.arch
else:
arch = self.default_arch()
self.qemu = QEMUS.get(arch)
if self.boot and not self.qemu:
sys.exit(
f"Can't boot architecture {arch}: don't know of an emulator for it"
)
mklabel = self._step("mklabel")
debootstrap = self._step("debootstrap")
grub = self._step("grub")
if args.debian_release is not None:
debootstrap["debootstrap"] = args.debian_release
if args.arch is not None:
debootstrap["arch"] = args.arch
debootstrap["include"] = debootstrap.get("include", []) + [
KERNELS[args.arch]
]
if args.mklabel is not None:
mklabel["mklabel"] = args.mklabel
if args.grub is not None:
grub["grub"] = args.grub
def _step(self, wanted):
for item in self.vmdb["steps"]:
if wanted in item:
return item
assert 0
def debootstrap_release(self):
for item in self.vmdb["steps"]:
if "debootstrap" in item:
return item["debootstrap"]
assert 0
def arch(self):
for item in self.vmdb["steps"]:
if "debootstrap" in item:
return item.get("arch", self.default_arch())
assert 0
def default_arch(self):
p = subprocess.run(
["dpkg", "--print-architecture"], check=True, capture_output=True
)
return p.stdout.decode().strip()
def log(self):
log = f"{self.debootstrap_release()}_{self.arch()}.log"
return os.path.join(self.tarball_directory, log)
def image(self):
image = f"{self.debootstrap_release()}_{self.arch()}.img"
return os.path.join(self.tarball_directory, image)
def tarball(self):
tarball = f"{self.debootstrap_release()}_{self.arch()}.tar.gz"
return os.path.join(self.tarball_directory, tarball)
def write_vmdb(self, filename):
with open(filename, "w") as f:
yaml.safe_dump(self.vmdb, stream=f, indent=4)
def run_vmdb2(config):
print(f"building image {config.image()}")
fd, vmdb = tempfile.mkstemp(dir=config.tarball_directory, suffix=".vmdb")
config.write_vmdb(vmdb)
os.close(fd)
argv = [
"./vmdb2",
"--rootfs-tarball",
config.tarball(),
"--verbose",
"--log",
config.log(),
"--output",
config.image(),
vmdb,
]
subprocess.run(argv, check=True, capture_output=not config.verbose)
os.remove(vmdb)
print(f"built image {config.image()} OK")
def smoke_test(config):
print(f"booting image {config.image()}")
assert config.qemu
tmp = tempfile.mkdtemp()
qemu_sh = os.path.join(tmp, "run.sh")
expect_txt = os.path.join(tmp, "expect.txt")
qemu_script = f"""\
#!/bin/bash
set -euo pipefail
cd {tmp}
cp /usr/share/OVMF/OVMF_VARS.fd .
qemu-system-x86_64 \
-m 1024 \
-drive if=pflash,format=raw,unit=0,file=/usr/share/ovmf/OVMF.fd,readonly=on \
-drive if=pflash,format=raw,unit=1,file=OVMF_VARS.fd \
-drive format=raw,file="{config.image()}" \
-nographic
"""
expect_script = f"""\
set timeout 300
proc abort {{}} {{
puts "ERROR ERROR\n"
exit 1
}}
spawn {qemu_sh}
expect "login: "
send "root\n"
expect "# "
send "poweroff\r"
set timeout 5
expect {{
"reboot: Power down" {{puts poweroffing\n}}
eof abort
timeout abort
}}
expect eof
"""
with open(qemu_sh, "w") as f:
f.write(qemu_script)
os.chmod(qemu_sh, 0o755)
with open(expect_txt, "w") as f:
f.write(expect_script)
p = subprocess.run(
["expect", "-d", expect_txt], check=False, capture_output=not config.verbose
)
shutil.rmtree(tmp)
if p.returncode != 0:
sys.stderr.write(p.stderr.decode())
sys.exit(f"{config.image()} failed to boot")
print(f"verified that {config.image()} boots OK")
def main():
config = Config()
if config.dump:
config.write_vmdb("/dev/stdout")
else:
run_vmdb2(config)
if config.boot:
smoke_test(config)
elif config.maybe_boot and config.qemu:
smoke_test(config)
main()
|
