11 from string import Template
13 import sliver_libvirt as lv
15 class Sliver_LXC(lv.Sliver_Libvirt):
16 """This class wraps LXC commands"""
20 # Need to add a tag at myplc to actually use this account
23 REF_IMG_BASE_DIR = '/vservers/.lvref'
24 CON_BASE_DIR = '/vservers'
27 def create(name, rec=None):
28 ''' Create dirs, copy fs image, lxc_create '''
29 logger.verbose ('sliver_lxc: %s create'%(name))
30 conn = lv.getConnection(Sliver_LXC.TYPE)
32 # Get the type of image from vref myplc tags specified as:
38 logger.log('sliver_libvirt: %s: WARNING - no vref attached defaults to lxc-f14' % (name))
39 vref = "lxc-f14-x86_64"
41 refImgDir = os.path.join(Sliver_LXC.REF_IMG_BASE_DIR, vref)
42 containerDir = os.path.join(Sliver_LXC.CON_BASE_DIR, name)
44 # check the template exists -- there's probably a better way..
45 if not os.path.isdir(refImgDir):
46 logger.log('sliver_lxc: %s: ERROR Could not create sliver - reference image %s not found' % (name,vref))
47 logger.log('sliver_lxc: %s: ERROR ctd expected reference image in %s'%(name,refImgDir))
50 # Template for libvirt sliver configuration
51 template_filename = Sliver_LXC.REF_IMG_BASE_DIR + '/config_template.xml'
53 with open(template_filename) as f:
54 template = Template(f.read())
55 xml = template.substitute(name=name, xid=xid)
57 logger.log('Cannot find XML template file %s'%template_filename)
60 # Snapshot the reference image fs (assume the reference image is in its own
62 command = ['btrfs', 'subvolume', 'snapshot', refImgDir, containerDir]
63 logger.log_call(command, timeout=15*60)
64 command = ['chmod', '755', containerDir]
65 logger.log_call(command, timeout=15*60)
69 # Set hostname. A valid hostname cannot have '_'
70 #with open(os.path.join(containerDir, 'etc/hostname'), 'w') as f:
71 # print >>f, name.replace('_', '-')
73 # Add slices group if not already present
74 command = ['/usr/sbin/groupadd', 'slices']
75 logger.log_call(command, timeout=15*60)
77 # Add unix account (TYPE is specified in the subclass)
78 command = ['/usr/sbin/useradd', '-g', 'slices', '-s', Sliver_LXC.SHELL, name, '-p', '*']
79 logger.log_call(command, timeout=15*60)
80 command = ['mkdir', '/home/%s/.ssh'%name]
81 logger.log_call(command, timeout=15*60)
83 # Create PK pair keys to connect from the host to the guest without
84 # password... maybe remove the need for authentication inside the
86 command = ['su', '-s', '/bin/bash', '-c', 'ssh-keygen -t rsa -N "" -f /home/%s/.ssh/id_rsa'%(name)]
87 logger.log_call(command, timeout=15*60)
89 command = ['chown', '-R', '%s.slices'%name, '/home/%s/.ssh'%name]
90 logger.log_call(command, timeout=15*60)
92 command = ['mkdir', '%s/root/.ssh'%containerDir]
93 logger.log_call(command, timeout=15*60)
95 command = ['cp', '/home/%s/.ssh/id_rsa.pub'%name, '%s/root/.ssh/authorized_keys'%containerDir]
96 logger.log_call(command, timeout=15*60)
98 # Lookup for xid and create template after the user is created so we
99 # can get the correct xid based on the name of the slice
100 xid = bwlimit.get_xid(name)
102 # Lookup for the sliver before actually
103 # defining it, just in case it was already defined.
105 dom = conn.lookupByName(name)
107 dom = conn.defineXML(xml)
108 logger.verbose('lxc_create: %s -> %s'%(name, lv.debuginfo(dom)))
113 logger.verbose ('sliver_lxc: %s destroy'%(name))
114 conn = lv.getConnection(Sliver_LXC.TYPE)
116 containerDir = Sliver_LXC.CON_BASE_DIR + '/%s'%(name)
119 # Destroy libvirt domain
120 dom = conn.lookupByName(name)
122 logger.verbose('sliver_lxc: Domain %s does not exist! UNEXPECTED'%name)
128 logger.verbose('sliver_lxc: Domain %s not running... continuing.'%name)
132 # Remove user after destroy domain to force logout
133 command = ['/usr/sbin/userdel', '-f', '-r', name]
134 logger.log_call(command, timeout=15*60)
136 # Remove rootfs of destroyed domain
137 command = ['btrfs', 'subvolume', 'delete', containerDir]
138 logger.log_call(command, timeout=15*60)
140 logger.verbose('sliver_libvirt: %s destroyed.'%name)