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buildserver: auto-detect and use libvirt's QEMU+KVM

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For running in QEMU/KVM guests like on jenkins.debian.net, this sets up the
whole process automatically.  This only really covers the case where this
is running in a KVM guest, and the original case of running VirtualBox on
bare metal.  It could be extended to cover more cases if someone wanted to.
This commit is contained in:
Hans-Christoph Steiner 2016-09-15 11:12:18 +02:00
parent f306e32636
commit 68ec7c2e88
2 changed files with 48 additions and 0 deletions
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8
examples/makebuildserver.config.py
View file

@ -48,3 +48,11 @@
# about the timeout, extend the timeout here. (default: 600 seconds) # about the timeout, extend the timeout here. (default: 600 seconds)
# #
# boot_timeout = 1200 # boot_timeout = 1200
# By default, this whole process uses VirtualBox as the provider, but
# QEMU+KVM is also supported via the libvirt plugin to vagrant. If
# this is run within a KVM guest, then libvirt's QEMU+KVM will be used
# automatically. It can also be manually enabled by uncommenting
# below:
#
# vm_provider = 'libvirt'

40
makebuildserver
View file

@ -64,8 +64,20 @@ config = {
'cpus': 1, 'cpus': 1,
'memory': 1024, 'memory': 1024,
'hwvirtex': 'off', 'hwvirtex': 'off',
'vm_provider': 'virtualbox',
} }
if os.path.isfile('/usr/bin/systemd-detect-virt'):
try:
virt = subprocess.check_output('/usr/bin/systemd-detect-virt').strip().decode('utf-8')
except subprocess.CalledProcessError as e:
virt = 'none'
if virt == 'qemu' or virt == 'kvm':
print('Running in a VM guest, defaulting to QEMU/KVM via libvirt')
config['vm_provider'] = 'libvirt'
elif virt != 'none':
print('Running in an unsupported VM guest (' + virt + ')!')
# load config file, if present # load config file, if present
if os.path.exists('makebuildserver.config.py'): if os.path.exists('makebuildserver.config.py'):
exec(compile(open('makebuildserver.config.py').read(), 'makebuildserver.config.py', 'exec'), config) exec(compile(open('makebuildserver.config.py').read(), 'makebuildserver.config.py', 'exec'), config)
@ -346,6 +358,7 @@ elif os.path.exists('/proc/cpuinfo'):
vf = os.path.join(serverdir, 'Vagrantfile.yaml') vf = os.path.join(serverdir, 'Vagrantfile.yaml')
writevf = True writevf = True
if os.path.exists(vf): if os.path.exists(vf):
print('Halting', serverdir)
vagrant(['halt'], serverdir) vagrant(['halt'], serverdir)
with open(vf, 'r', encoding='utf-8') as f: with open(vf, 'r', encoding='utf-8') as f:
oldconfig = yaml.load(f) oldconfig = yaml.load(f)
@ -361,6 +374,33 @@ if writevf:
with open(vf, 'w', encoding='utf-8') as f: with open(vf, 'w', encoding='utf-8') as f:
yaml.dump(config, f) yaml.dump(config, f)
if config['vm_provider'] == 'libvirt':
returncode, out = vagrant(['box', 'list'], serverdir, printout=options.verbose)
found_basebox = False
needs_mutate = False
for line in out.splitlines():
if line.startswith(config['basebox']):
found_basebox = True
if line.split('(')[1].split(',')[0] != 'libvirt':
needs_mutate = True
continue
if not found_basebox:
if isinstance(config['baseboxurl'], str):
baseboxurl = config['baseboxurl']
else:
baseboxurl = config['baseboxurl'][0]
print('Adding', config['basebox'], 'from', baseboxurl)
vagrant(['box', 'add', '--name', config['basebox'], baseboxurl],
serverdir, printout=options.verbose)
needs_mutate = True
if needs_mutate:
print('Converting', config['basebox'], 'to libvirt format')
vagrant(['mutate', config['basebox'], 'libvirt'],
serverdir, printout=options.verbose)
print('Removing virtualbox format copy of', config['basebox'])
vagrant(['box', 'remove', '--provider', 'virtualbox', config['basebox']],
serverdir, printout=options.verbose)
print("Configuring build server VM") print("Configuring build server VM")
returncode, out = vagrant(['up', '--provision'], serverdir, printout=True) returncode, out = vagrant(['up', '--provision'], serverdir, printout=True)
with open(os.path.join(serverdir, 'up.log'), 'w') as log: with open(os.path.join(serverdir, 'up.log'), 'w') as log: